DIGITAL ELECTRONICS MCQS SET 05

DIGITAL ELECTRONICS MCQS SET 05

1. The resolution of an n bit DAC with a maximum input of 5 V is 5 mV. The value of n is …….
1. 8          2. 9         3. 10          4. 11
Answer: 3

2. 2’s complement of binary number 0101 is ………..
1. 1011        2. 1111        3. 1101       4. 1110
Answer: 1

3. An OR gate has 4 inputs. One input is high and the other three are low. The output is …….
1. Low      
2. High         
3. Alternately high and low
4. May be high or low depending on relative magnitude of inputs
Answer: 2

4. Decimal number 10 is eual to binary number ……………
1. 1110      2. 1010     3. 1001     4. 1000
Answer: 2

5. Both OR and AND gates can have only two inputs.
1. True            2. False
Answer: 2

6. A device which converts BCD to seven segments is called ……..
1. Encoder        2. Decoder      3. Multiplexer        4. None of these
Answer: 2

7. In 2’s complement representation the number 11100101 represents the decimal number ……………
1. +37       2. -31         3. +27             4. -27
Answer: 4

8. A decade counter skips ………..
1. binary states 1000 to 1111               2. binary states 0000 to 0011
3. binary states 1010 to 1111                4. binary states 1111 to higher
Answer: 3
 

9. BCD input 1000 is fed to a 7 segment display through a BCD to 7 segment decoder/driver. The segments which will lit up are ………….
1. a, b, d       2. a, b, c        3. all           4. a, b, g, c, d
Answer: 3

10. A ring counter with 5 flip flops will have ………. states.
1. 5         2. 10            3. 32          4. Infinite
Answer: 1