In this blog you will find the correct answer of the Coursera quiz Fundamentals of Network Communication Coursera Week 4 Quiz mixsaver always try to brings best blogs and best coupon codes
 

Week- 4

Practice Assessment – Error Control

 

1. Given a 7-bit information frame (0, 1, 0, 1, 1, 0, 1), what is the even parity bit?

 

  • 1
  • 0
  • None of the above

2. Which of following statements are true for single-bit parity error detection?

 

  • It can detect all single bit errors in an information frame
  • It can detect all double bit errors in an information frame
  • It can detect all tripe bit errors in an information frame
  • None of the above

3. Which of following statements are true for two-dimensional parity error detection?

 

  • It can detect all single bit errors in an information frame
  • It can correct all single bit errors in an information frame
  • It can detect all double bit errors in an information frame
  • All of the above

4. Assume bit errors occur at random. If each bit has 50% probability to be in error by transmission. What is the probability of a four-bit frame to be in error by transmission?

 

  • 1/4
  • 1/8
  • 1/16
  • None of the above

5. What is the binary sequence that corresponds to polynomial code X^3 + x^2 + 1?

 

  • 0111
  • 1101
  • 111
  • 1110

6. Block codes are generated using _____.

 

  • Generator matrix
  • Generator polynomial
  • Both of the mentioned
  • None of the mentioned

7. Which of the following is true for two-dimensional parity check

 

  • Arrange information in columns
  • Arrange information in rows
  • More parity bit to improve coverage
  • Add multiple parity bits to each column

8. Polynomial codes are implemented using shift register circuits

 

  • True
  • False

9. What is the binary equivalent of the following polynomial arithmetic

x7 + x6 + x5 + x2 + 1

 

  • 11100111
  • 11011101
  • 11101101
  • 11100101

10. Using Euclidean Division, what will be the remainder of 70 by 999 where 70 is the divisor and 999 is the dividend

 

  • 14
  • 19
  • 21
  • 17

 

 

Graded Assessment – Error Control

 

1. Given an information polynomial code I(x) = X^7 + x^6 + x^1 + 1, which is its corresponding per-bit information frame?

 

  • 11000011
  • 01100011
  • None of the above
  • 10100010

2. What is the remainder obtained by dividing x^7 + x^5 + 1 by the generator polynomial x^3 + 1?

 

  • x^2 + x + 1
  • x^2 + x
  • x^2 + 1
  • None of the above

3. Given a generator polynomial g(x) = x^3 + x + 1. Consider the information sequence 1001. By CRC method, what is the resulted codeword for transmission?

 

  • 1001000
  • 1010110
  • 1001110
  • 1001111

4. Which of following generator polynomial can detect all single bit errors in an information frame?

 

  • g(x) = x
  • g(x) = x^2
  • g(x) = x + 1
  • All of the above

5. Internet protocols use check bits to detect errors, instead of using CRC polynomial. The primary rationale is

 

  • Strength of error detection capability
  • Simplicity of implementation
  • CRC polynomial cannot work for Internet protocols
  • None of the above

6. The two basic approaches in error control are error prevention and detection, and error correction and re-transmission

 

  • True
  • False

7. Find parity bit for 1001011

 

  • 0
  • 1
  • 2
  • None of the above

8. The divisor in a cyclic code is normally called the _________.

 

  • Degree
  • Redundancy
  • Generator
  • None of the above

9. The checksum of 0000 and 0000 is

 

  • 0101
  • 1010
  • 1111
  • 0000

10. In ASCII, a single parity bit code can detect ________ errors.

 

  • An even number of
  • No errors
  • An odd number of
  • Two

 

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