Latest Activity In Study Groups

Join Your Study Groups

VU Past Papers, MCQs and More

We non-commercial site working hard since 2009 to facilitate learning Read More. We can't keep up without your support. Donate.

CS401 Grand Quiz + Mid Term Quiz Fall 2020 Prepartion Material Due Date: 27-12-2020

Dear Students, please share your Current Midterm Paper (Grand Quiz) Fall 2020. This will be helpful for many students who are looking for help/assistance regarding there Grand Quiz.

Let's help each other in Grand Quiz and make vustudents into a better community for VU students.

Just copy text of each MCQ of your Grand Quiz and paste here or save in a MS Word/PDF file and upload in replies.

 

VU Students team will post here Grand quiz about this subject, to help VU Students. Let's discuss here abouth Grand QUIZ, clear your concepts, improve learning and help each other. Good luck 

Views: 10225

Replies to This Discussion

Question # 3 of 10 Total Marks: 1

Peripheral address space is selected when which of the following instructions is given to the processor?

Select correct option:

MOV

DEC

IN

ADD

Question # 4 of 10 Total Marks: 1

Creation of threads can be Select correct option:

Static

Dynamic

Both

None of the above

Question # 5 of 10 Total Marks: 1

Which of the following IRQs is used by the parallel port?

Select correct option:

IRQ 4

5

6

7

Question # 6 of 10 Total Marks: 1 Priority of IRQ 0 interrupt is Select correct option: Highest low

medium

None of the above

Question # 7 of 10 Total Marks: 1

The number of pins in a parallel port connector are?

Select correct option:

20

25

30

35

Question # 8 of 10 Total Marks: 1 The interrupt call loads new values in CS, IP and Select correct option:

DS

SS

FLAG Bookmark

Question # 9 of 10 Total Marks: 1 All the registers and stacks are saved in Select correct option:

Multitasking

Multi Processing

Function Call

BIOS

Question # 10 of 10 Total Marks: 1

In 9 pin DB connector ,which pin is assigned to TD.

Select correct option:

1

2

3

4

  1. Assembly language is not a low level language.
  2. True

b.            False

  1. In case of COM File first command parameter is stored at ______ offset of program segment prefix.

a. 0x80 (Not Confirm)

  1. 0x82
  2. 0x84
  3. 0x86
  4. Address always goes from
  5. Processor to meory

b. Memory to processor

  1. Memory to memory
  2. None of the above
  3. The source register in OUT is

a.        AL or AX

  1. BL or BX
  2. CL or CX
  3. DL or DX
  4. By default CS is associated with
  5. SS
  6. BP
  7. CX

d.              IP

  1. Which of the following pins of parallel port are grounded
  2. 10-18

b.            18-25

  1. 25-32
  2. 32-39
  3. In the instruction mov word [es:160], 0x1230, 30 represents the character
  4. A
  5. B

c.                0

  1. 1
  2. On executing 0x21 0x3D, if file cant be opened then

a.  CF will contain 1

  1. CF will contain 0
  2. ZF will contain 1
  3. ZF will contain 0
  4. Which of the following IRQ is cascading interrupt
  5. IRQ 0
  6. IRQ 1

c.            IRQ 2

  1. IRQ 3
  2. The execution of instruction mov word [es:160], 0x1230, will print a character on the screen at

a. First column of second row

  1. Second column of first row
  2. Second column of second row
  3. First column of third row

Question No: 1 ( Marks: 1 ) - Please choose one To transfer control back the RET instruction take

  • 1 argument· 1 argument
  • 3 arguments
  • No arguments

Question No: 2                                                            ( Marks: 1 ) - Please choose one

In STOSB instruction SI is decremented or incremented by

4

1

2

3

Question No: 3                                                            ( Marks: 1 ) - Please choose one

CMPS instruction subtracts the source location ______from the destination location.

DS:SI DS:DI

ES:SI

ES:DI

Question No: 4                                                            ( Marks: 1 ) - Please choose one

Regarding assembler, which statement is true:

Assembler converts mnemonics to the corresponding OPCODE

Assembler converts OPCODE to the corresponding mnemonics

Assembler executes the assembly code all at once

Assembler executes the assembly code step by step

Question No: 5                                                            ( Marks: 1 ) - Please choose one

If “BB” is the OPCODE of the instruction which states to “move a constant value to AX register”, the hexadecimal representation (Using little Endian notation) of the instruction “Mov AX,336” (“150” in hexadecimal number system) will be:

  • 0xBB0150
  • 0x5001BB
  • 0x01BB50
  • 0xBB5001

Question No: 6                                                            ( Marks: 1 ) - Please choose one

In the instruction  MOV AX, 5 the number of operands are

  • 1
  • 2
  • 3
  • 4

Question No: 7                                                            ( Marks: 1 ) - Please choose one

The maximum parameters a subroutine can receive (with the help of registers) are

  • 6
  • 7
  • 8
  • 9

Question No: 8                                                            ( Marks: 1 ) - Please choose one

In assembly the CX register is used normally as a ______________register.

  • source
  • counter
  • index
  • pointer

Question No: 9                                                            ( Marks: 1 ) - Please choose one

All the addressing mechanisms in iAPX 8 8 return a number called _ _ _ _ _ _ _ _ _ _ _ _ _ address .

  • effective
  • faulty
  • indirect
  • direct

Question No: 10                                                             ( Marks: 1 ) - Please choose one

When a 16 bit number is divided by an 8 bit number, the dividend will be in

  • AX
  • BX
  • CX
  • DX

Question No: 11                                                             ( Marks: 1 ) - Please choose one

in Left-Shift-Operation the left most bit _______

  • will drop
  • will go into CF
  • Will come to the right most
  • will be always 1

Question No: 12                                                             ( Marks: 1 ) - Please choose one

Suppose the decimal number "35" after shifting its binary two bits to left, the new value becomes _________

  • 35
  • 70
  • 140
  • 17

Question No: 13                                                             ( Marks: 1 ) - Please choose one

When divide overflow occurs processor will be interrupted this type of interrupt is called

  • Hardware interrupt
  • Software interrupt
  • Processor exception
  • Logical interrupts

Question No: 14                                                             ( Marks: 1 ) - Please choose one

Which mathematical operation is dominant during the execution of SCAS instruction

  • Division
  • Multiplication
  • Addition
  • Subtraction

Question No: 15                                                             ( Marks: 1 ) - Please choose one

After the execution of REP instruction CX will be decremented then which of the following flags will be affected?

  • CF· OF
  • DF
  • No flags will be affected

Question No: 16                                                             ( Marks: 1 ) - Please choose one

_________ is one of the reasons due to which string instructions are used in 8088

  • Efficiency and accuracy
  • Reduction in code size and accuracy
  • Reduction in code size and speed
  • Reduction in code size and efficiency

Question No: 1    ( Marks: 1 )    - Please choose one

The physical address of the stack is obtained by

► SS:SI combination

► SS:SP combination

► ES:BP combination

► ES:SP combination

Question No: 2    ( Marks: 1 )    - Please choose one

After the execution of instruction “RET ”

► SP is incremented by 2

► SP is decremented by 2

► SP is incremented by 1

► SP is decremented by 1

Question No: 3    ( Marks: 1 )    - Please choose one

The second byte in the word designated for one screen location holds

► The dimensions of the screen

► Character position on the screen

► Character color on the screen

► ASCII code of the character

Question No: 4    ( Marks: 1 )    - Please choose one

REP will always

► Increment CX by 1

► Increment CX by 2

► Decrement CX by 1

► Decrement CX by 2

Question No: 5    ( Marks: 1 )    - Please choose one

The basic function of SCAS instruction is to

► Compare

► Scan

► Sort

► Move data

Question No: 6    ( Marks: 1 )    - Please choose one Index registers are used to store __________ ►Data

►Intermediate result

►Address

►Both data and addresses

Question No: 7    ( Marks: 1 )    - Please choose one

The bits of the _____________ work independently and individually ►index register

►base register

►flags register ►accumulator

Question No: 8    ( Marks: 1 )    - Please choose one To convert any digit to its ASCII representation

► Add 0x30 in the digit

► Subtract 0x30 from the digit        ► Add 0x61 in the digit

► Subtract 0x61 from the digit

Question No: 9    ( Marks: 1 )    - Please choose one

When a 32 bit number is divided by a 16 bit number, the quotient is of        ► 32 bits

► 16 bits

► 8 bits

► 4 bits

Question No: 10    ( Marks: 1 )    - Please choose one

When a 16 bit number is divided by an 8 bit number, the quotient will be in        ► AX

► AL

► AH        ► DX

Question No: 11    ( Marks: 1 )    - Please choose one

Which mathematical operation is dominant during the execution of SCAS instruction        ► Division

► Multiplication

► Addition

► Subtraction

Question No: 12    ( Marks: 1 )    - Please choose one

If AX contains decimal -2 and BX contains decimal 2 then after the execution of instructions:

CMP  AX, BX  JA label

► Jump will be taken

► Zero flag will set

► ZF will contain value -4

► Jump will not be taken

Question No: 13    ( Marks: 1 )    - Please choose one

The execution of the instruction “mov word [ES : 160],  0x1230” will print a character “0” on the screen at

► Second column of first row

► First column of second row

► Second column of second row

► First column of third row

Question No: 14    ( Marks: 1 )    - Please choose one

If the direction of the processing of a string is from higher addresses towards lower addresses then

► ZF is cleared

► DF is cleared

► ZF is set

► DF is set

Question No: 15    ( Marks: 1 )    - Please choose one

The instruction ADC has________   Operand(s)

► 0

► 1

► 2

► 3

Question No: 16    ( Marks: 1 )    - Please choose one

Which bit of the attributes byte represents the red component of background color ?

► 3

► 4

► 5

► 6

Q=1:

Which bit of attributes byte represents the blue component of foreground color? 0

  • 1
  • 2
  • 3

Q=2:

The clear screen operation initializes the whole block of video memory to:

  • 0417
  • 0714
  • 0741
  • 0720

Q=3:

When the operand of DIV instruction is of 16 bit then implied dividend will be of

  • 64-bit
  • 32-bits
  • 16-bits
  • 8--bits

Q=4

Which of the following is the pair of register used to access memory in string instruction:

  • DI and BP
  • SI and  BP
  • DI and SI
  • DS and Si

Q=5

A fat32 file system directory entry in DOS consist of how many bytes?

  • 16
  • 24
  • 32
  • 64

Q=6:

Which register is generally used to specify the services number of an interrupt?

DX

AX

BX

CX

………………………………………………………………………………………….

Q=7:

In 9 pin db  9 connector ,which pin is assigned to RD(received data)

  • 1
  • 2
  • 3
  • 4

Q=8

In case of COM file, maximum length of parameters passed through command line can be……….

  • 63 bytes
  • 127bytes
  • 255 bytes
  • 511 bytes

Q=9

We can access the DOS service using;

  • Int 0x21
  • Int 0x13
  • Int 0x 10
  • Int 0x 08

Q=10

In 9 pin 9 connector,which pin is assigned to signal ground

  • 3
  • 4
  • 5
  • 6

Q=11:

BPB stands for

  • Basic parameter block
  • Bios precise block
  • Basic precise block
  • Bios parameter block

Q=12

Int 13-bios disk service “generally uses which register to return the error flag?

  • CF ·       DL
  • AH
  • AL

Q=13:

The first sector on the hard disk contains the

  • Hard disk size
  • Partition table
  • Data size
  • Sector size

Q=14

Operating system organize data in the form of

  • Folder
  • Batch file
  • File
  • None of above

………

Q=15

In 9 pin db 9 connector, which pin is assigned to TD(transmitted data)

  • 1
  • 2
  • 3
  • 4

Q=16”

Device derive can be divided into ----------major categories.

·

5

·

4

·

3

·

2

  1. BL contains 5 decimal then after right shift , BL will become
  • 3
  • 2.5
  • 5
  • 10
  1. 8 * 16 font is stored in ________ bytes.
  • 3
  • 4
  • 8
  • 16
  1. In DOS input buffer , number of characters actually read on return is stored in
  • First byte
  • Second byte
  • Third byte
  • Fourth byte
  1. IRQ 0 has priority
  • Low
  • High
  • Highest
  • Medium
  1. Thread registration code initialize PCB and add to linked list so that _____ will give itturn.
  • Assembler
  • Linker
  • Scheduler
  • Debugger
  1. Traditional calling conventions are in ______ number
  • 1
  • 2
  • 3
  • 4
  1. VESA VEB 2.0 is standard for
  • High Resolution Mode
  • Low Resolution Mode
  • Very High Resolution Mode
  • Medium Resolution Mode
  1. To clear direction flag which instruction is used
  • Cld
  • Clrd
  • Cl df
  • Clr df
  1. In STOSW instruction , When DI is cleared , SI is
  • Incremented by 1
  • Incremented by 2
  • Decremented by 1
  • Decremented by 2
  1. Interrupt that is used in debugging with help of trap flag is
  • INT 0
  • INT 1
  • INT 2
  • INT 3
  1. INT for arithmetic overflow is
  • INT 1
  • INT 2
  • INT 3
  • INT 4
  1. IRQ referred as
  • Eight Input signals
  • One Input signal
  • Eight Output signals
  • One output signal
  1. IRQ for keyboard is ____1_____
  2. IRQ for sound card is ______5_______
  3. IRQ for floppy disk is ______6_______
  4. IRQ with highest priority is
  • Keyboard IRQ
  • Timer IRQ
  • Sound Card
  • Floppy Disk
  1. Pin for parallel port ground is
  • 10-18
  • 18-25
  • 25-32
  • 32-39
  1. The physical address of Interrupt Descriptor Table (IDT) is stored in
  • GDTR
  • IDTR
  • IVT
  • IDTT
  1. Execution of “RET 2” results in?
  2. CX register is· Count register
  • Data register
  • Index register
  • Base register
  1. OUT instruction uses __AX_____ as source register.
  2. IN DB-9 connector the Data Set ready pin is at
  • 5
  • 6
  • 7
  • 8
  1. If two devices uses same IRQ then there is
  • IRQ collision
  • IRQ conflict
  • IRQ drop
  1. VESA organizes 16 bit color for every pixel in ratio
  • 5:5:5
  • 5:6:5
  • 6:5:6
  • 5:6:7
  1. Division by zero is done by which interrupt.Interrupt 0.

Question No: 1    ( Marks: 1 )    - Please choose one

After the execution of SAR instruction

► The msb is replaced by a 0

► The msb is replaced by 1

► The msb retains its original value

► The msb is replaced by the value of CF

Question No: 2    ( Marks: 1 )    - Please choose one

RETF will pop the offset in the

► BP

► IP

► SP

► SI

Question No: 3    ( Marks: 1 )    - Please choose one

The routine that executes in response to an INT instruction  is called

► ISR

► IRS

► ISP

► IRT

Question No: 4    ( Marks: 1 )    - Please choose one

The first instruction of “COM” file must be at offset:

► 0x0010

► 0x0100

► 0x1000

► 0x0000

Question No: 5    ( Marks: 1 )    - Please choose one

“Far” jump is not position relative but is _______________

► memory   dependent

► Absolute

► temporary

► indirect

Question No: 6    ( Marks: 1 )    - Please choose one

Only ___________ instructions allow moving data from memory to memory.

► string

► word

► indirect

► stack

Question No: 7    ( Marks: 1 )    - Please choose one

After the execution of instruction “RET 2”

► SP is incremented by 2

► SP is decremented by 2

► SP is incremented by 4

► SP is decremented by 4

Question No: 8    ( Marks: 1 )    - Please choose one

DIV instruction has

► Two forms

► Three forms

► Four forms

► Five forms

Question No: 9    ( Marks: 1 )    - Please choose one

When the operand of DIV instruction is of 16 bits then implied dividend will be of

► 8 bits

► 16 bits

► 32 bits

► 64 bits

Question No: 10    ( Marks: 1 )    - Please choose one

After the execution of MOVS instruction which of the following registers are updated        ► SI only

► DI only

► SI and DI only

► SI, DI and BP only

Question No: 11    ( Marks: 1 )    - Please choose one

In 8088 architecture, whenever an element is pushed on the stack

► SP is decremented by 1

► SP is decremented by 2        ► SP is decremented by 3

► SP is decremented by 4

Question No: 12    ( Marks: 1 )    - Please choose one

When a very large number is divided by very small number so that the quotient is larger than the space provided, this is called

► Divide logical error

► Divide overflow error

► Divide syntax error

► An illegal instruction

Question No: 13    ( Marks: 1 )    - Please choose one

In the word designated for one screen location, the higher address contains

► The character code

► The attribute byte

► The parameters

► The dimensions

Question No: 14    ( Marks: 1 )    - Please choose one

Which of the following options contain the set of instructions to open a window to  the video memory?

► mov AX, 0xb008 mov ES, AX

► mov AX, 0xb800 mov ES, AX

► mov AX, 0x8b00 mov ES, AX

► mov AX, 0x800b mov ES, AX

Question No: 15    ( Marks: 1 )    - Please choose one

In a video memory, each screen location corresponds to        ► One byte

► Two bytes        ► Four bytes

► Eight bytes

Question No: 16    ( Marks: 1 )    - Please choose one

The execution of the instruction “mov word [ES : 0],  0x0741” will print character  “A” on screen , background color of the screen will be

► Black

► White

► Red

► Blue

Question No: 1 ___( Marks: 1 ) - Please choose one Which of the following is not true about registers?

  • Their operation is very much like memory
  • Intermediate results may also be stored in registers.· They are also called scratch pad ram · None of given options.

Question No: 2 ___( Marks: 1 ) - Please choose one

move [bp], al moves the one byte content of the AL register to the address contained in BP register in the current

  • Stack segment
  • Code segment
  • Data segment
  • Extra segment

Question No: 3 ( Marks: 1 ) - Please choose one

In a rotate through carry right (RCR) instruction applied on a 16 bit word Effectively there is

  • 16 bits rotation
  • 1 bit rotation
  • 17 bits rotation
  • 8 bits rotation

Question No: 4__ ( Marks: 1 ) - Please

choose one The 8088 stack works on

  • Word sized elements
  • Byte sized elements
  • Double sized element
  • Nible sized element

Question No: 5 ( Marks: 1 ) - Please choose one

An 8 x 16 font is stored in………..Bytes

  • 2
  • 4
  • 8
  • 16

Question No: 6 ( Marks: 1 ) - Please

INT 10 is used for…………………services.

  • RAM
  • Disk
  • BIOS video
  • DOS video

Question No: 7 __ ( Marks: 1 ) - Please choose one

Priority of IRQ 0 interrupt is

  • medium
  • high
  • highest
  • low

Question No: 8 __ ( Marks: 1 ) - Please choose one

Threads can have function calls, parameters and ___________variables.

  • global
  • local
  • legal
  • illegal

Question No: 9 __ ( Marks: 1 ) - Please choose one How many prevalent calling conventions do……….exist

  • 1
  • 2
  • 3
  • 4

VERY IMPORTANT

Question No: 10 ( Marks: 1 ) - Please choose one In 9pin DB 9 DSR is assigned on pin number

  • 4
  • 5
  • 6
  • 7

Question No: 11

( Marks: 1 ) - Please

choose one In 9pin DB 9 CTS is assigned on pin number

  • 6
  • 7
  • 8
  • 9

Question No: 12__ ( Marks: 1 ) - Please choose one

In 9pin DB 9 CD is assigned on pin number

  • 1
  • 2
  • 3
  • 4

Question No: 13__ ( Marks: 1 ) - Please choose one

In 9pin DB 9 RD is assigned on pin number

  • 1
  • 2
  • 3
  • 4

Question No: 14 __ ( Marks: 1 ) - Please choose one

in device attribute word which of the following bit decides whether it is a cha rater · device or a block device

  • Bit 12 Bit 13
  • Bit 14
  • Bit 15

Question No: 15__ ( Marks: 1 ) - Please choose one

Video services are classified into ___________broad categories

  • 2
  • 3
  • 4
  • 5

Question No: 16 ( Marks: 1 ) - Please choose

one In STOSB instruction, when DF is clear, SI is

  • Incremented by 1
  • Incremented by 2
  • Decremented by 1
  • Decremented by 2

Question No: 17 ( Marks: 1 ) - Please choose one The process of sending signals back and forth is called

  • Activity
  • Hand-shaking
  • Interruption
  • Time clicking

Question No: 18 ( Marks: 1 ) - Please choose one which of the following is a special type of interrupt that returns to the same instruction instead of the next instruction

  • Divide overflow interrupt
  • Debug interrupt
  • Arithmetic overflow interrupt
  • Change of sign interrupt

Question No: 19 ___( Marks: 1 ) - Please choose one Which of the following IRQs is derived by a timer device?

  • IRQ 0
  • IRQ 1
  • IRQ 2
  • IRQ 3

Question No: 20 __ ( Marks: 1 ) - Please choose one

Which of the following interrupts is used for Arithmetic overflow

  • INT 1
  • INT 2
  • INT 3
  • INT 4

Question No: 21 __ ( Marks: 1 ) - Please choose one

Which of the following IRQs is connected to serial port COM 2?

  • IRQ 0
  • IRQ 1
  • IRQ 2
  • IRQ 3

Question No: 22 __ ( Marks: 1 ) - Please choose one

An End of Interrupt (EOI) signal is sent by

  • Handler
  • Processor
  • IRQ
  • PIC

Question No: 23 __ ( Marks: 1 ) - Please choose one The source registers in OUT is

  • AL or AX
  • BL or BX
  • CL or CX
  • DL or DX

Question No: 24 ( Marks: 1 ) - Please choose one

In programmable interrupt controller which of the following ports is used for selectively enabling or disabling interrupts

  • 19
  • 20

· 21

  • 22

Question No: 25 ( Marks: 1 ) - Please choose one The number of pins in a parallel port connector are?

  • 25
  • 30
  • 35
  • 45

Question No: 26 ( Marks: 1 ) - Please choose one

Which of the following pins of a parallel port connector are grounded?

  • 10-18
  • 18-25
  • 25-32
  • 32-39

Question No: 27 __ ( Marks: 1 ) - Please choose one

Suppose a decimal number 35 when its binary is shifted to write two places the

new number will become

  • 35
  • 70
  • 140
  • 17

Question No: 28 __ ( Marks: 1 ) - Please choose one

A 32bit address register can access upto ............................of memory so memory access has increased a lot.

  • 2GB
  • 4GB
  • 6GB
  • 8GB

Question No: 29 __ ( Marks: 1 ) - Please choose one

In NASM an imported symbol is declared with the ................................while and exported symbol is declared with the ......................................................................

  • Global directive, External directive· External directive, Global directive
  • Home Directive, Foreign Directive
  • Foreign Directive, Home Directive

Question No: 30 ( Marks: 1 ) - Please choose one Single step interrupt is

Question No: 1 ( Marks: 1 )

- Please choose one

Sun SPARC Processor has a fixed ______________ instruction size.

  • 16bit

· 32bit

  • 64bit
  • 20bit

Question No: 2 ( Marks: 1 )

- Please choose one

When the subprogram finishes, the ____________________ retrieves the return address from the stack and transfers control to that location.

· RET instruction

  • CALL instruction
  • POP instruction
  • Jump instruction

Question No: 3 ( Marks: 1 )

- Please choose one

A 32 bit address register can access upto __________ of memory.

  • 1 GB
  • 6 GB

· 4 GB

  • 2 GB

Question No: 4 ( Marks: 1 )

- Please choose one

The value of a segment register when the processor is running under protected mode is called

· segment descriptor

  • segment selector
  • global descriptor table
  • protected register

Question No: 5 ( Marks: 1 )

- Please choose one

FS and GS are two ___________________ in protected mode.

· segment registers

  • segment selectors
  • stack pointers
  • register pointers

Question No: 6 ( Marks: 1 )

- Please choose one

IRQ 0 interrupt have _______________ priority

  • low
  • medium

· highest

  • lowest

Question No: 7 ( Marks: 1 )

- Please choose one

IDT stands for ______________________.

  • interrupt descriptor table
  • individual descriptor table
  • inline data table

· interrupt descriptor table

Question No: 8 ( Marks: 1 )

- Please choose one

Every bit of line status in serial port conveys _____________ information.

· different

  • same
  • partial
  • full

Question No: 9 ( Marks: 1 )

- Please choose one

There are total _______________ bytes in a standard floppy disk.

  • 1444k

· 1440k

  • 1280k
  • 2480k

Question No: 10 ( Marks: 1 )

- Please choose one

An 8x16 font is stored in _________________ bytes.

  • 8

· 16

  • 4
  • 20

=============================================================

. Serial Port is also accessible via        I/O       ports ,        COM 1     is accessible via ports 3F8-3FF while    COM 2      is accessible via 2F8 -2FF.

The first register at 3F8 is the   Transmitter holding register if written to and the receiver buffer register if read from.

Other register of our interest include 3F9 whose     Bit  0 must be set to enable received data available interrupt and   Bit    1           must be set to enable transmitter holding register empty interrupt.

(Transmitter, COM 1, I/O ports , COM2. bit 0 , Buffer , 3FA)

====================================================

Question # 1

There are three busses to communicate the processor and memory named as _____________ 1) : address bus.,data bus and data bus.

2)   : addressing bus.,data bus and data bus.

3)   : address bus.,datamove bus and data bus.

4)   : address bus.,data bus and control bus..

Question # 2

The address bus is unidirectional and address always travels from processor to memory. 1) : TRUE

2) : FALSE

Question # 3

Data bus is bidirectional because________

1)   : To way

2)   : Data moves from both, processor to memory and memory to processor,

3)   : Data moves from both, processor to memory and memory to data Bus,

4)   : None of the Given

Correct Option : 3 From : Lecture 1

Question # 4

Control bus________ 1) : is Not Important.

2)   : is Important .

3)   : bidirectional.

4)   : unidirectional .

Correct Option : 3 From : Lecture 1

Question # 5

A memory cell is an n-bit location to store data, normally ________also called a byte

1)   : 4-bit

2)   : 8-bit

3)   : 6-bit

4)   : 80-bit

Correct Option : 2 From : Lecture 1

Question # 6

The number of bits in a cell is called the cell width.______________ define the memory completely.

1)   : Cell width and number of cells,

2)   : cell number and width of the cells,

3)   : width

4)   : Height

Correct Option : 1 From : Lecture 1

Question # 7

for memory we define two dimensions. The first dimension defines how many __________bits are there in a single memory cell.

1)   : parallel

2)   : Vertical

3)   : long

4)   : short

Correct Option : 1 From : Lecture 1

Question # 8

__________ operation requires the same size of data bus and memory cell width. 1) : Normal

2)   : Best and simplest

3)   : first

4)   : None of the Given

Correct Option : 2 From : Lecture 1

Question # 9

Control bus is only the mechanism. The responsibility of sending the appropriate signals on the control bus to the memory is of the_________________.

1)   : Data Bus

2)   : processor

3)   : Address Bus

4)   : None of the Given

Correct Option : 2 From : Lecture 1

Question # 10

In “total: dw 0 ” Opcode total is a ___________ 1) : Literal

2)   : Variable

3)   : Label

4)   : Starting point

Correct Option : 3 From : Lecture 10

Question # 11

| 0 |--›| 1 | 1 | 0 | 1 | 0 | 0 | 0 | --›| C | is a example of ______

1)   : Shl

2)   : sar

3)   : Shr

4)   : Sal

Correct Option : 3 From : Lecture 10

Question # 12

| C |‹--| 1 | 1 | 0 | 1 | 0 | 0 | 0 | ‹--| 0 | is a example of ______

1)   : Shl

2)   : sar

3)   : Shr

4)   : Sal

Correct Option : 1 From : Lecture 10

Question # 13

ADC has _________ operands.

1)   : two

2)   : three

3)   : Five

4)   : Zero

Correct Option : 2 From : Lecture 10

Question # 14

The basic purpose of a computer is to perform operations, and operations need ____________.

1)   : order

2)   : nothing

3)   : operands

4)   : bit

Correct Option : 3 From : Lecture 2

Question # 15

Registers are like a scratch pad ram inside the processor and their operation is very much like normal______________.

1)   : Number

2)   : opreations

3)   : memory cells

4)   : None of the Given

Correct Option : 3 From : Lecture 2

Question # 16

There is a central register in every processor called the _______ and The word size of a

processor is defined by the width of its__________.

1)   : accumulator,accumulator

2)   : data bus,accumulator

3)   : accumulator, Address Bus

4)   : accumulator,memory

Correct Option : 1 From : Lecture 2

Question # 17

___________does not hold data but holds the address of data

1)   : Pointer, Segment, or Base Register

2)   : Pointer, Index, or Base Register

3)   : General Registers

4)   : Instruction Pointer

Correct Option : 2 From : Lecture 2

Question # 18

“The program counter holds the address of the next instruction to be _____________” 1) : executed.

2)   : called

3)   : deleted

4)   : copy

Correct Option : 1 From : Lecture 2

Question # 19

There are _____ types of “instruction groups”

1) : 2) : 5

3)   : 3

4)   : 2

Correct Option : 1 From : Lecture 2

Question # 20

These instructions are used to move data from one place to another.

1) : TRUE 2) : FALSE

3)   :

4)   :

Correct Option : 1 From : Lecture 2

Question # 21

“mov” instruction is related to the _______ *****.

1)   : Arithmetic and Logic Instructions

2)   : Data Movement Instructions

3)   : Program Control Instructions

4)   : Special Instructions

Correct Option : 2 From : Lecture 2

Question # 22

______________allow changing specific processor behaviors and are used to play with it.

1)   : Special Instructions

2)   : Data Movement Instructions

3)   : Program Control Instructions

4)   : Arithmetic and Logic Instructions

Correct Option : 1 From : Lecture 2

Question # 23

8088 is a 16bit processor with its accumulator and all registers of __________.

1)   : 32 bits

2)   : 6 bits

3)   : 16 bits

4)   : 64 bits

Correct Option : 3 From : Lecture 2

Question # 24

The __________ of a processor means the organization and functionalities of the registers it contains and the instructions that are valid on the processor.

1)   : Manufactures

2)   : architecture

3)   : Deal

4)   : None of the Given

Correct Option : 2 From : Lecture 2

Question # 25

Intel IAPX88 Architecture is ___________

1)   : More then 25 old

2)   : New

3)   : Not Good

4)   : None of the Given

Correct Option : 1 From : Lecture 2

Question # 26

The iAPX88 architecture consists of______registers.

1)   : 13

2)   : 12

3)   : 9

4)   : 14

Correct Option : 4 From : Lecture 3

Question # 27

General Registers are ______________

1)   : AX, BX, CX, and DX

2)   : XA, BX, CX, and DX

3)   : SS,SI and DI

4)   : 3

Correct Option : 1 From : Lecture 3

Question # 28

AX means we are referring to the extended 16bit “A” register. Its upper and lower byte are separately accessible as ________________.

1)   : AH and AL

2)   : A Lower and A Upper

3)   : AL, AU

4)   : AX

Correct Option : 1 From : Lecture 3

Question # 29

AX is General purpose Register where A stands for__________.

1)   : Acadmic

2)   : Ado

3)   : Architecture

4)   : Accumulator

Correct Option : 4 From : Lecture 3

Question # 30

The B of BX stands for _________because of its role in memory addressing. 1) : Busy

2)   : Base

3)   : Better

4)   : None of the Given

Correct Option : 2 From : Lecture 3

Question # 31

The D of DX stands for Destination as it acts as the destination in _____________________.

1)   : I/O operations

2)   : operations

3)   : memory cells

4)   : Memory I/O operations

Correct Option : 1 From : Lecture 3

Question # 32

The C of CX stands for Counter as there are certain instructions that work with an automatic count in the ___________.

1)   : DI register

2)   : BX register

3)   : CX register

4)   : DX register

Correct Option : 3 From : Lecture 3

Question # 33

_________are the index registers of the Intel architecture which hold address of data and used in memory access.

1)   : SI and SS

2)   : PI and DI

3)   : SI and IP

4)   : SI and DI

Correct Option : 4 From : Lecture 3

Question # 34

In Intel IAPX88 architecture ___________ is the special register containing the address of the next instruction to be executed.

1)   : AX

2)   : PI

3)   : IP

4)   : SI

Correct Option : 3 From : Lecture 3

Question # 35

SP is a memory pointer and is used indirectly by a set of ____________.

1)   : instructions

2)   : Pointers

3)   : Indexes

4)   : Variables

Correct Option : 1 From : Lecture 3

Question # 36

___________is also a memory pointer containing the address in a special area of memory called the stack.

1)   : SP

2)   : BP

3)   : PB

4)   : AC

Correct Option : 2 From : Lecture 3

Question # 37

____________is bit wise significant and accordingly each bit is named separately. 1) : AX

2)   : FS

3)   : IP

4)   : Flags Register

Correct Option : 4 From : Lecture 3

Question # 38

When two 16bit numbers are added the answer can be 17 bits long, this extra bit that won’t fit in the target register is placed in the __________where it can be used and tested 1) : carry flag

2)   : Parity Flag

3)   : Auxiliary Carry

4)   : Zero Flag

Correct Option : 1 From : Lecture 3

Question # 39

Program is an ordered set of instructions for the processor.

1) : TRUE 2) : FALSE

3)   :

4)   :

Correct Option : 1 From : Lecture 3

Question # 40

For Intel Architecture “operation destination, source” is way of writing things.

1) : TRUE 2) : FALSE

3)   :

4)   :

Correct Option : 1 From : Lecture 3

Question # 41

Operation code “ add ax, bx ” ____________.

1)   : Add the bx to ax and change the bx

2)   : Add the ax to bx and change the ax

3)   : Add the bx to ax and change the ax

4)   : Add the bx to ax and change nothing

Correct Option : 3 From : Lecture 3

Question # 42

The maximum memory iAPX88 can access is________________.

1)   : 1MB

2)   : 2MB

3)   : 3MB

4)   : 128MB

Correct Option : 1 From : Lecture 4

Question # 43

The maximum memory iAPX88 can access is 1MB which can be accessed with _______________.

1)   : 18 bits

2)   : 20 bits

3)   : 16 bits

4)   : 2 bits

Correct Option : 2 From : Lecture 4

Question # 44

_____________address of 1DED0 where the opcode B80500 is placed.

1)   : physical memory

2)   : memory

3)   : efective

4)   : None of the Given

Correct Option : 1 From : Lecture 4

Question # 45

16 bit of Segment and Offset Addresses can be converted to 20bit Address i.e

Segment Address with lower four bits zero + Offset Address with ______ four bits zero = 20bit Physical Address

1)   : Middle

2)   : lower

3)   : Top

4)   : upper

Correct Option : 4 From : Lecture 4

Question # 46

When adding two 20bit Addresses a carry if generated is dropped without being stored anywhere and the phenomenon is called address______.

1)   : wraparound

2)   : mode

3)   : ping

4)   : error

Correct Option : 1 From : Lecture 4

Question # 47 segments can only be defined a 16byte boundaries called _____________ boundaries.

1)   : segment

2)   : paragraph

3)   : Cell

4)   : RAM

Correct Option : 1 From : Lecture 4

Question # 48

in a Program CS, DS, SS, and ES all had the same value in them. This is called _____________________.

1)   : equel memory

2)   : overlapping segments

3)   : segments hidding

4)   : overlapping SI

Correct Option : 2 From : Lecture 4

Question # 49

“db num1” size of the memory is _____________

1)   : 1byte

2)   : 4bit

3)   : 16bit

4)   : 2byte

Correct Option : 1 From : Lecture 5

Question # 50

“ 1------------[org 0x0100]

2------------mov ax, [num1] ; load first number in ax

3------------mov bx, [num2] ; load second number in bx

4------------add ax, bx _________________________________

5------------int 0x21

6------------

7------------num1: dw 5 8------------num2: dw 10

Comments for the 4 are :

1)   : No comments Will be

2)   : ; accumulate sum in add

3)   : ; accumulate sum in ax

4)   : ; accumulate sum in Bx

Correct Option : 3 From : Lecture 5

Question # 51

In “ mov ax, bx ” is _____________ Addressing Modes.

1)   : Immediate

2)   : Indirect

3)   : Direct

4)   : Register

Correct Option : 4 From : Lecture 5

Question # 52

In “mov ax, [bx] ” is _____________ Addressing Modes

1)   : Based Register Indirect

2)   : Indirect

3)   : Base Indirect

4)   : Immediate

Correct Option : 1 From : Lecture 5

Question # 53

In “mov ax, 5 ” is _____________ Addressing Modes

1)   : Immediate

2)   : Indirect

3)   : Indirect

4)   : Register

Correct Option : 1 From : Lecture 6

Question # 54

In “ mov ax, [num1+bx] ” is ___________ ADDRESSING

1)   : OFFSET+ Indirect

2)   : Register + Direct

3)   : Indirect + Reference

4)   : BASEd REGISTER + OFFSET

Correct Option : 4 From : Lecture 7

Question # 55

“base + offset addressing ” gives This number which came as the result of addition is called the _______. 1) : Address

2)   : mode

3)   : effective address

4)   : Physical Address

Correct Option : 3 From : Lecture 7

Question # 56

“mov ax, [cs:bx]” associates _________ for this one instruction

1)   : CS with BX

2)   : BX with CS 3) : BX with AX

4) : None of the Given

Correct Option : 2 From : Lecture 7

Question # 57

For example

BX=0100

DS=FFF0

And Opcode are; move [bx+0x0100], Ax

now what is the effective memory address;

1)  : 0020

2)  : 0200

3)  : 0300

4)  : 0x02

Correct Option : 2 From : Lecture 7

Question # 58

For example

BX=0100

DS=FFF0

And Opcode are; move [bx+0x0100], Ax

now what is the physical memory address;

1)  : 0020

2)  : 0x0100

3)  : 0x10100

4)  : 0x100100

Correct Option : 2 From : Lecture 7

Question # 59

In “ mov [1234], al ” is _____________ Addressing Modes.

1)   : Immediate

2)   : Indirect

3)   : Direct

4)   : Register

Correct Option : 3 From : Lecture 8

Question # 60

In “ mov [SI], AX ” is _____________ Addressing Modes.

1)   : Basef Register Indirect

2)   : Indirect

3)   : Indexed Register Indirect

4)   : Immediate

Correct Option : 3 From : Lecture 8

Question # 61

In “ mov ax, [bx - Si] ” is ___________ ADDRESSING

1)   : Basef Register Indirect

2)   : Indirect

3)   : Direct

4)   : illegal

Correct Option : 4 From : Lecture 8

Question # 62

In “ mov ax, [BL] ” there is error i.e. __________

1)   : Address must be 16bit

2)   : Address must be 8bit

3)   : Address must be 4bit

4)   : 8 bit to 16 bit move illegal

Correct Option : 4 From : Lecture 8

Question # 63

In “ mov ax, [SI+DI] ” there is error i.e. __________

1)   : Two indexes can’t use as Memory Address

2)   : index can’t use as Memory Address

3)   : I don't Know

4)   : None of the Given

Correct Option : 1 From : Lecture 8

Question # 64

In JNE and JNZ there is difference for only _____________;

1)   : Programmer or Logic

2)   : Assembler

3)   : Debugger

4)   : IAPX88

Correct Option : 1 From : Lecture 9

Question # 65

JMP is Instruction that on executing take jump regardless of the state of all flags is called__________

1)   : Jump

2)   : Conditional jump

3)   : Unconditional jump

4)   : Stay

Correct Option : 3 From : Lecture 9

Question # 66

When result of the source subtraction from the destination is zero, zero flag is set i.e. ZF=1 its mean that;

1)   : DEST = SRC

2)   : DEST != SRC

3)   : DEST < SRC

4)   : DEST > SRC

Correct Option : 1 From : Lecture 9

Question # 67

When an unsigned source is subtracted from an unsigned destination and the destination is smaller, borrow is needed which sets the ____________.

1)   : carry flag i.e CF = 0

2)   : carry flag i.e CF = 1

3)   : Carry Flag + ZF=1

4)   : None of the Given

Correct Option : 2 From : Lecture 9

Question # 68

In the case of unassigned source and destination when subtracting and in the result ZF =1 OR

CR=1 then _______

1)   : DEST = SRC

2)   : DEST != SRC

3)   : UDEST ? USRC

4)   : DEST < SRC

Correct Option : 3 From : Lecture 9

Question # 69

In the case of unassigned source and destination when subtracting and in the result ZF =0

AND CR=0 then _______

1)   : DEST = SRC

2)   : DEST != SRC

3)   : UDEST < USRC

4)   : UDEST > USRC

Correct Option : 4 From : Lecture 9

Question # 70

In the case of unassigned source and destination when subtracting and in the result CR=0 then _______ 1) : DEST = SRC

2)   : DEST != SRC

3)   : UDEST < USRC

4)   : UDEST ? USRC

Correct Option : 4 From : Lecture 9

Question # 71

______This jump is taken if the last arithmetic operation produced a zero in its destination.

After a CMP it is taken if both operands were equal.

1)   : Jump if zero(JZ)/Jump if equal(JE)

2)   : Jump if equal(JE)

3)   : Jump if zero(JZ)

4)   : No Jump fot This

Correct Option : 1 From : Lecture 9

Question # 72

_______This jump is taken after a CMP if the unsigned source is smaller than or equal to the unsigned destination.

1)   : JBE(Jump if not below or equal)

2)   : JNA(Jump if not above)/JBE(Jump if not below or equal)

3)   : JNA(Jump if not above)

4)   : No Jump fot This

Correct Option : 2 From : Lecture 9

Question # 73

Numbers of any size can be added using a proper combination of __________.

1)   : ADD and ADC

2)   : ABD and ADC3) : ADC and ADC

4) : None of the Given

Correct Option : 1 From : Lecture 11

Question # 74

Like addition with carry there is an instruction to subtract with borrows called____________.

1) : SwB 2) : SBB

3)   : SBC

4)   : SBBC

Correct Option : 2 From : Lecture 11

Question # 75

if “and ax, bx” instruction is given, There are _____________ operations as a result

1) : 16 AND 2) : 17 AND

3)   : 32 AND

4)   : 8 AND

Correct Option : 1 From : Lecture 12

  1. Assembly language is not a low level language.
  2. True
  3. False
  4. In case of COM File first command parameter is stored at ______ offset of program segment prefix.
  5. 0x80 (Not Confirm)
  6. 0x82
  7. 0x84
  8. 0x86

3. Address always goes from

  1. Processor to meory
  2. Memory to processor
  3. Memory to memory
  4. None of the above

4. The sourse register in OUT is

  1. AL or AX
  2. BL or BX
  3. CL or CX
  4. DL or DX

5. By default CS is associated with

  1. SS
  2. BP
  3. CX
  4. IP

6. Which of the following pins of parallel port are grounded

  1. 10-18
  2. 18-25
  3. 25-32
  4. 32-39

7. In the instruction mov word [es:160], 0x1230, 30 represents the character a. A

  1. B
  2. 0
  3. 1

8. On executing 0x21 0x3D, if file cant be opened then

  1. CF will contain 1
  2. CF will contain 0
  3. ZF will contain 1
  4. ZF will contain 0

9. Which of the following IRQ is cascading interrupt

  1. IRQ 0
  2. IRQ 1
  3. IRQ 2
  4. IRQ 3

10. The execution of instruction mov word [es:160], 0x1230, will print a character on the screen at

  1. First column of second row
  2. Second column of first row
  3. Second column of second row
  4. First column of third row

1)))SHR and SAL are same?

.True (correct)

.False

2)))mov ax,0 will set ZF flag

.True

.False

3)))In 9 pin DB connector ,which pic is assigned to TD.

.       1

.       2

.       3(correct)

.       4

4)))Lower 16 bits of EAX are labeled as

. AX(correct)

. BX

.EAX

.none of above

5))) which is the special prefix used for repeating a block

.rep(correct)

.repeat

.repb

.repe

6)) JA can not after cmp if unsigned destinition is greater than source

.true

.false

Q=1 Conditional jump can only:

  1. Far
  2. short
  3. near
  4. all of the given

q=2:

Address is always go from:

  1. Processor to memory
  2. Memory to processor
  3. Memory to memory
  4. None of given

Q=3;

Programmable interrupt controllers have two ports 20 and 21……port 20 is a control port while port 21 is ………..

  1. The interrupt make register
  2. Interrupt port
  3. Output port
  4. Input port

Q=4:

In the instruction “move word[es:160],0x1230 represent the charechter…………

1.....................................................................

2.....................................................................

 

  1. 0
  2. 1

Q=5:

The 8088 processor divides interrupts into how many classes?

  1. 2
  2. 3 3. 4
  3. 5

Q=6:

Which of the following is the pair of register used to access memory in string instruction?

  1. DI and BP
  2. SI and BP
  3. DI and SI
  4. DS and SI

Q=7:

In case of COM file,first command line parameter is stored at ………..offset of program segment prefix’

  1. 0x80 2. 0x82
  2. 0x84
  3. 0x86

Q=8:

The INT 0x13 service 0x03 is use to …

  1. Read disk sector
  2. Write disk sector
  3. Reset disk sector
  4. Get drive parameters

Q=9:

After the execution of STOSWB,the CX wil be……..

  1. Incremented by 1
  2. Incremented by 2
  3. Decremented by 1
  4. Decremented by 2

Q=10

The execution of the instruction “mov word [ES:160],0x1230”will print a character on the screen at:

  1. First column of second row
  2. Second column of first row
  3. Second column of second row
  4. First column of third row

                        

RSS

© 2022   Created by + M.Tariq Malik.   Powered by

Promote Us  |  Report an Issue  |  Privacy Policy  |  Terms of Service