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# Assignment No. 4 CS601 Data Communication Semester: Spring 2015 Due Date: August 5, 2015.

Assignment No. 4
Semester: Spring 2015
Data Communication - CS601
Total Marks: 10

Due Date: 05/08/2015

Objective:

To have the understanding of Error Detection And Correction Methods.

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Assignment

Question - 1
Consider the following group of bits along with odd parity LRC bits is sent to the receiver, but due to transmission impairments some bits of LRC are lost. You are required to identify the lost LRC bits and complete the given table.

Group of bits LRC bits
10101110 11001101 10101010 11110000 1 ? ? ? 0 ? ? 0

Question - 2
Find the binary equivalent of the Polynomial given in following table:

Polynomial Binary Equivalent
X3+X2+1 ?
X4+X+1 ?
X5+X2+1 ?
X6+X+1 ?
X3+X ?

Wish You All The Best

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### Replies to This Discussion

2nd question solution

1101

10011

100101

1000011

1010

Question - 1

Consider the following group of bits along with odd parity LRC bits is sent to the receiver, but due to transmission impairments some bits of LRC are lost. You are required to identify the lost LRC bits and complete the given table.

 Group of bits LRC bits 10101110 11001101 10101010 11110000 1 0 0 0 0 1 1 0

Question - 2

Find the binary equivalent of the Polynomial given in following table:

 Polynomial Binary Equivalent X3+X2+1 110+1 X4+X+1 1001+1 X5+X2+1 1001+1 X6+X+1 100001+1 X3+X 10+1

Assignment No 4

CS601

Spring 2015

Question - 1

Consider the following group of bits along with odd parity LRC bits is sent to the receiver, but due to transmission impairments some bits of LRC are lost. You are required to identify the lost LRC bits and complete the given table.

Solution

Given group of bits

10101110  11001101  10101010  11110000

Converts this group of bit in to LRC

LRC

10000110

Question - 2

Find the binary equivalent of the Polynomial given in following table:

Solution

 Polynomial Binary Equivalent X3+X2+1 1101 X4+X+1 10011 X5+X2+1 10011 X6+X+1 1000011 X3+X 1011

Second bit from left shouldn't be one?

could you explain this assignment plzzzzzz

1) how to find the polynomial?

2) how we calculate or identified LRC bits lost?

x^5+x^2+1

This equation has x^5 so 1 is written than it don't have x^4 a 0 is written again 0 for x^3 than x^2 is in the equation so a 1 is written than 0 for x and 1 for the constant as a constant is in the equation finally 100101

2. arrange 32 bits in 4x4 matrix than sum each column. for odd parity if answer of a bit is even add 1 else 0. For even parity if answer is odd add 1 else 0

Tariq sb you have pasted 2 different solutions. which one is correct?

Spring 2015
Assignment No. 03
Total Marks: 15
Objectives
To assess the students’ knowledge of stylistic accuracy and key concepts of Business English
Instructions
1. The assignments sent after the Due Date will not be accepted.
2. The corrupt files will be marked zero.
3. The assignments should be zoomed in at 100%.
4. Plagiarism will NOT be tolerated. Plagiarism means taking credit for someone else’s work by presenting it as your own.
5. No marks will be awarded for copied assignments and the case may be referred to the discipline committee for a suitable action.
6. No assignment will be accepted through e-mail.
7. The font color should be preferably black and font size should be 12 Times New Roman.
Q. 1. Recall the directions for writing INSTRUCTIONS and correct the sentences given in the table.

An example is given for guidance. (10)
Example:
Accidental covering of antenna area should be avoided as connectivity problems may be caused.
Correction:
Avoid accidental covering of antenna area as it may cause connectivity problems.

Sr. Instructions Corrections

1 Screen protector should not be used as it may cause breakdowns.
2 The power button should be pressed for locking or unlocking the device.
4 To start Web search the menu button should be touched and held on home screen.
5 Home button should be pressed to get back to main menu.

Question No.2
By removing the choppiness, improve the following sentences. (2,1,1,1 =5)
1. She took music classes. She had no sense of rhythm. She finally gave up the idea of becoming a musician.
2. The boy asked his father a question. The boy is five years old. The question was
3. I like dogs. Dogs make good pets. Dogs are friendly and loyal.
4. I like movies. I go to movies every weekend. I like action movies best.
Spring 2015
Assignment No. 03
Total Marks: 15
Objectives
To assess the students’ knowledge of stylistic accuracy and key concepts of Business English
Instructions
1. The assignments sent after the Due Date will not be accepted.
2. The corrupt files will be marked zero.
3. The assignments should be zoomed in at 100%.
4. Plagiarism will NOT be tolerated. Plagiarism means taking credit for someone else’s work by presenting it as your own.
5. No marks will be awarded for copied assignments and the case may be referred to the discipline committee for a suitable action.
6. No assignment will be accepted through e-mail.
7. The font color should be preferably black and font size should be 12 Times New Roman.
Q. 1. Recall the directions for writing INSTRUCTIONS and correct the sentences given in the table.

An example is given for guidance. (10)
Example:
Accidental covering of antenna area should be avoided as connectivity problems may be caused.
Correction:
Avoid accidental covering of antenna area as it may cause connectivity problems.

Sr. Instructions Corrections

1 Screen protector should not be used as it may cause breakdowns.
2 The power button should be pressed for locking or unlocking the device.
4 To start Web search the menu button should be touched and held on home screen.
5 Home button should be pressed to get back to main menu.

Question No.2
By removing the choppiness, improve the following sentences. (2,1,1,1 =5)
1. She took music classes. She had no sense of rhythm. She finally gave up the idea of becoming a musician.
2. The boy asked his father a question. The boy is five years old. The question was
3. I like dogs. Dogs make good pets. Dogs are friendly and loyal.
4. I like movies. I go to movies every weekend. I like action movies best.
Spring 2015
Assignment No. 03
Total Marks: 15
Objectives
To assess the students’ knowledge of stylistic accuracy and key concepts of Business English
Instructions
1. The assignments sent after the Due Date will not be accepted.
2. The corrupt files will be marked zero.
3. The assignments should be zoomed in at 100%.
4. Plagiarism will NOT be tolerated. Plagiarism means taking credit for someone else’s work by presenting it as your own.
5. No marks will be awarded for copied assignments and the case may be referred to the discipline committee for a suitable action.
6. No assignment will be accepted through e-mail.
7. The font color should be preferably black and font size should be 12 Times New Roman.
Q. 1. Recall the directions for writing INSTRUCTIONS and correct the sentences given in the table.

An example is given for guidance. (10)
Example:
Accidental covering of antenna area should be avoided as connectivity problems may be caused.
Correction:
Avoid accidental covering of antenna area as it may cause connectivity problems.

Sr. Instructions Corrections

1 Screen protector should not be used as it may cause breakdowns.
2 The power button should be pressed for locking or unlocking the device.
4 To start Web search the menu button should be touched and held on home screen.
5 Home button should be pressed to get back to main menu.

Question No.2
By removing the choppiness, improve the following sentences. (2,1,1,1 =5)
1. She took music classes. She had no sense of rhythm. She finally gave up the idea of becoming a musician.
2. The boy asked his father a question. The boy is five years old. The question was
3. I like dogs. Dogs make good pets. Dogs are friendly and loyal.
4. I like movies. I go to movies every weekend. I like action movies best.

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2

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