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# Quiz No 2 Data communication (CS601) Solution and Discussion Spring 2014 Due Date: June 04, 2014

Dear Students,

Quiz No. 2 of CS601 will be held on June 03, 2014 and will also remain open on June 04, 2014.

Lecture no. 11 to 20 will be included in the quiz.

You are required to attempt the quiz as early as possible once it is available to you.

Best of Luck! Regards,

Views: 5210

### Replies to This Discussion

6. Sampling means measuring ______________ of signal at equal intervals.

Amplitudes
Frequencies
Phases
Bits

7. _______encoding is almost obsolete today
Bipolar
Unipolar
Polar
Dual polar

8, The sampling rate must be at least _______ the highest frequency.
twice
half
thrice
once

9. There are _________ types of serial transmission.
3
4
2

10. In a time-domain plot, the horizontal axis is a measure of ________.

Phase
Signal Amplitude
Frequency
Time

6. Amplitudes
7. Unipolar
8. twice
9. 2
10. Frequency

Thank u so much

There are _________ types of serial transmission.

3

4

2

none

2

Quantization is a method of assigning __________ values in a specific range to sampled instances.

negatiuve

positive

bianry

integral

positive

There are ________ types of digital to digital encoding.

2

3

4

5

___________ rate is the number of bits transmitted during 1 s.

bit

baud

modulation

sampling

____ is a type of transmission impairment in which the signal loses strength due to the resistance of the transmission medium.

Attenuation

Noise

Distortion

Desibles

noise

psk

fsk

4psk

Analog To Analog Conversion Methods include ______.

AM, PM and FM

AM, FSK and PM

AM, PM and QAM

None

Asynchronous transmission is fast as compared to synchronous transmission.

true

false

The inversion of the level represents a 1 bit in ______ encoding

NRZ-I

NRZ-L

RZ

NRZ-I

Manchester

In _________ type of encoding, 1’s and 0’s generated by the computer are translated into voltage pulses that can be propagated over the wire

Digital/digital

Analog/digital

Digital/analog

Analog/analog

@ Rooman, well done, keep it up

@Ahmed.Thank you

jazak ALLAH khair

BIT rate ;no of bits transmitted during one secound page no 85 lecture 17

(CS601) Quiz 2 | Date: June 3, 2014 | Time: 08:00 PM

1. Sampling means measuring ______________ of signal at equal intervals.

amplitude
frequency
phases
bits

2. Frequency and period are ______.

propotional to each other
inverse
same
diffrent

3._______ describes the position of the waveform relative to time 0.

amplitude
frequecy
phase
voltage

4. Quantization is a method of assigning __________ values in a specific range to sampled instances.

negative
positive
binary
integral

5. Following characteristics fully describe ______________ Amplitude Period/ Frequency Phase

sine wave
digital signal
aperoidic signal
none

1. amplitude
2. inverse
3. phase
4. integral
5. sine wave

6. Bit rate is always _________to Baud rate.

less than
les than or equal to
greater than

7. ________ is the simplest type of bipolar encoding

AMI
NRZ
ARZ

8. _______ data are continuous and take continuous values.

digital
analog
both
frequency

9. Each time eight 0’s occur , _____ introduces changes in pattern based on polarity of previous 1 (the ‘1’ occurring just before zeros)

RZ
HDB3
B8ZS
AMI

1

2

3

4

5

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