| 1. | A switch-tail ring counter is made by using a single D-FF, the following circuit is ? | |
|
T FF
|
||
|
D FF
|
||
|
S-R FF
|
||
|
J-K FF
|
||
View Answer
Discuss in Forum
Report Question| 2. | Master-slave flip flop consists of ________ flip-flop(s) ? | |
|
1
|
||
|
2
|
||
|
3
|
||
|
4
|
||
| 3. | In a T flip-flop no of input circuit is ? | |
|
1
|
||
|
2
|
||
|
3
|
||
|
4
|
||
| 4. | To add two m-bit numbers, the required number of half adders is ? | |
|
2m-1
|
||
|
2^m-1
|
||
|
2m +1
|
||
|
2 m
|
||
| 5. | Which of the following circuits come under the class of combinational logic circuits 1. Full adder. 2. Full subtracter. 3. Half adder. 4. J-K flip. 5. Counter. Select the correct answer from the codes given below ? | |
|
1 only
|
||
|
3 and 4
|
||
|
4 and 5
|
||
|
1, 2, and 3
|
||
| 6. | A gate is inhibited when its inhibit input is at '1'. The gate is ? | |
|
AND
|
||
|
NAND
|
||
|
OR
|
||
|
NOR
|
||
| 7. | The logic function; Out= ab + bc + ca defines: 1. The output of a 3-inputs XOR gate. 2. The output of a 3-inputs majority gate. 3. The sum output of a full adder. 4. The carry output of a full adder ? | |
|
1 and 2
|
||
|
2 and 3
|
||
|
3 and 4
|
||
|
2 and 4
|
||
| 8. | To add two four-bit numbers with high speed, minimum circuits needed are ? | |
|
4 full adders
|
||
|
5 full adders
|
||
|
3 full adders and one half adder
|
||
|
only one full adder
|
||
| 9. | Consider the following statements: For 3 input variables a, b, c; a Boolean function y= ab + bc + ca represents 1. a 3-input majority gate 2. a 3-input minority gate 3. carry output of a full adder 4. product circuit for a, b and c Which of the above statements are correct ? | |
|
1 and 4 only
|
||
|
2 and 3 only
|
||
|
1 and 3 only
|
||
|
3 and 4 only
|
||
| 10. | A full subtractor can be constructed from two half subtractors and ? | |
|
2-input NAND
|
||
|
2-input NOR
|
||
|
2-input OR
|
||
|
2-input AND
|
||