# Home / ECE / Digital Electronics :: Section 1

### ECE :: Digital Electronics

1. The resolution of an n bit DAC with a maximum input of 5 V is 5 mV. The value of n is

2.  A. 8 B. 9 C. 10 D. 11   3. 2's complement of binary number 0101 is

4.  A. 1011 B. 1111 C. 1101 D. 1110   5. An OR gate has 4 inputs. One input is high and the other three are low. The output

6.  A. is low B. is high C. is alternately high and low D. may be high or low depending on relative magnitude of inputs   7. Decimal number 10 is equal to binary number

8.  A. 1110 B. 1010 C. 1001 D. 1000   9. Both OR and AND gates can have only two inputs.

10.  A. True B. False   11. A device which converts BCD to seven segment is called

12.  A. encoder B. decoder C. multiplexer D. none of these   13. In 2's complement representation the number 11100101 represents the decimal number

14.  A. +37 B. -31 C. +27 D. -27   16.  A. binary states 1000 to 1111 B. binary states 0000 to 0011 C. binary states 1010 to 1111 D. binary states 1111 to higher   17. 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

18.  A. a, b, d B. a, b, c C. all D. a, b, g, c, d   19. A ring counter with 5 flip flops will have

20.  A. 5 states B. 10 states C. 32 states D. infinite states   