## Binary Code MCQ

Binary Code MCQ, MCQ on Binary Code, Multiple Choice Questions on Binary Code, Objective Questions on Binary Code, Engineering MCQ, Digital Electronics MCQ,

### Objective Type Questions

Q.1. The code used in digital systems to represent decimal digits, letters, and other special characters such as +, -, ., *, etc. is

- hexadecimal
- octal
- natural BCD
- ASCII

**Answer: **ASCII

Q.2. The codes in which each successive code word differs from the preceding one in only one bit position are called

- BCD codes
- sequential codes
- self-complementing codes
- cyclic codes

**Answer: **cyclic codes

Q.3. Unit distance code is the other name of

- sequential code
- self-complementing code
- cyclic code
- XS-3 code

**Answer: **cyclic codes

Q.4. For mathematical operations the code must be a

- sequential code
- cyclic code
- self -complementing code
- unit distance code

**Answer: **sequential code

Q.5. (11011)_{2} in BCD 8421 code is

- 00011011
- 00100111
- 11011001
- 01101100

**Answer: **00100111

Q.6. (1D)_{16} in BCD 8421 code is

- 00011101
- 00101001
- 00011101
- 00100100

**Answer:** 00101001

Q.7. (44)_{8} in BCD 8421 code is

- 01000100
- 00100100
- 00110110
- 01100011

**Answer: **00110110

Q.8. For a code to be self-complementing, the sum of all its weights must be

- 6
- 9
- 10
- 12

**Answer: **9

Q.9. The following code is not a BCD code.

- Gray code
- XS-3 code
- 8421 code
- All of these

**Answer: **Gray code

Q.10. The parity of the binary number 11011001 is

- even
- not known
- odd
- same as the number of zeros

**Answer: **odd

Q.11. 2-out-of-5 code is

- weighted code
- self-complementing code
- non-weighted code
- alphanumeric code

**Answer: **non-weighted code

Q.12. 8421 code is

- self-complementing code
- weighted code
- non-weighted code
- alphanumeric code

**Answer: **weighted code

Q.13. 2421 code is

- weighted self-complementing code
- non-weighted self-complementing code
- weighted non-self-complementing code
- non-weighted and non-self-complementing code

**Answer: **weighted self-complementing code

Q.14. The minimum distance of ASCII code is

- 1
- 2
- 3
- 4

**Answer: **1

Q.15. A code with a minimum distance of 3 can

- detect double error and correct single error
- detect and correct double error
- detect single and correct double error
- not detect and correct any error

**Answer: **detect double error and correct single error

Q.16. The minimum distance required for a code to detect and correct single bit error is

- 1
- 2
- 3
- 4

**Answer:** 3

Q.17. The minimum distance of a straight binary 4-bit code is

- 0
- 1
- 2
- 3

**Answer:** 1

Q.18. The minimum distance of a straight binary 5-bit code is

- 0
- 1
- 2
- 3

**Answer:** 1

Q.19. The distance between the two binary words 01101101 and 00110100 is

- 2
- 3
- 4
- 5

**Answer:** 4

Q.20. For a code to be a single-bit error correcting code, the minimum distance of that code must be

- 1
- 2
- 3
- 4

**Answer:** 3

Q.21. For 2-bit error detection, the minimum distance of that code must be

- 2
- 3
- 4
- 6

**Answer:** 3

Q.22. The 7-bit Hamming code is used to transmit

- 3 data bits
- 4 data bits
- 7 data bits
- no data bits

**Answer: **4 data bits

Q.23. ASCII and EBCDIC codes are

- BCD codes
- numeric codes
- alphanumeric codes
- error correcting codes

**Answer: **alphanumeric codes

Q.24. ASCII code is a

- 5-bit code
- 7-bit code
- 8-bit code
- 10-bit code

**Answer: **7-bit code

Q.25. EBCDIC code is a

- 5-bit code
- 7-bit code
- 8-bit code
- 10-bit code

**Answer: **8-bit code

Q.26. A 15-bit Hamming code requires

- 4 parity bits
- 5 parity bits
- 15 parity bits
- none of these

**Answer: **4 parity bits

Q.27. How many bits are needed to encode all the letters (26), 10 symbols and all numerals (10)?

- 4
- 5
- 6
- 7

**Answer:** 7

Q.28. Which of the following codes is known as the 8421 code?

- Gray code
- XS-3 code
- ASCII code
- BCD code

**Answer: **BCD code

Q.29. ASCII

- is a subset of 8-bit EBCDIC
- is used only in western countries
- is version II of the ASC standard
- has 128 characters including control characters

**Answer: **has 128 characters including control characters

Q.30. The XS-3 code is a

- cyclic code
- weighted code
- self-complementing code
- error-correcting code

**Answer: **self-complementing code

Q.31. In which code do the successive code characters differ in only one position?

- Gray code
- XS-3 code
- 8421 code
- Hamming code

**Answer: **Gray code

Q.32. In which of the following codes do the successive characters differ in only 1-bit position?

- 8421 code
- 2421 code
- cyclic code
- binary code

**Answer: **cyclic code

Q.33. Which of the following is a self-complementing code?

- XS-3 code
- Gray code
- Hamming code
- cyclic code

**Answer: **XS-3 code

Q.34. The word length of the Hamming code to represent decimal digits is

- 4
- 5
- 6
- 7

**Answer: **7

Q.35. The number of parity bits in a 12-bit Hamming code is

- 4
- 5
- 6
- 8

**Answer: **4

Objective Questions on Number System