1. The 4-bit group that is used in excess 3 code is ?

0001

0011

0010

1110

Answer: 0011

Explanation:


2. Octal coding involves grouping of bits in ?

3's

5's

4's

6's

Answer: 3's

Explanation:


3. What is difference between binary coding and binary coded decimal ?

Binary coding is pure binary

Binary coding has a decimal format

BCD is pure binary

BCD has no decimal format

Answer: Binary coding is pure binary

Explanation:


4. The 'radix' of an octal system is ?

8

16

2

5

Answer: 8

Explanation:


5. The Excess-3 code of decimal 2 is ?

1010

1100

0101

0011

Answer: 0101

Explanation:


6. The Gray code for number 7 is ?

0100

1001

0110

1100

Answer: 1100

Explanation:


7. EBCDIC is abbreviated as ?

Extended Bit Coded Decimal Interchange Code

Extended Binary Coded Dectation Interchange Code

Extended Binary Color Decimal Interchange Code

Extended Binary Coded Decimal Interchange Code

Answer: Extended Binary Coded Decimal Interchange Code

Explanation:


8. Among the following mentioned codes which one is capable of both error detection and correction ?

Hamming code

Unicode

Repetition code

Both Hamming and Repetition code

Answer: Both Hamming and Repetition code

Explanation:


9. Odd parity generator uses ..... Logic ?

X-NOR

Sequential

XOR

OR

Answer: XOR

Explanation:


10. Which one of the following is a non-valid BCD code ?

0111 1001

0101 1011

0100 1000

0100 1001

Answer: 0101 1011

Explanation: