## 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

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