Important MCQs of DLD

Important MCQs of DLD

1. Why we use demultiplexer?

A. Route the data from single input to one of many outputs
B. Select data from several inputs and route it to a single output
C. Perform serial to parallel conversion
D. Both a and b

Answer - Click Here:
D

2. Which is an example of synchronous inputs?

A. Preset input (PRE)
B. EN input
C. J-K input
D. Clear Input (CLR)

Answer - Click Here:
C

3. Which one is the Second step of making transition table?

A. determining feedback loop
B. designating output of loops
C. deriving functions of Y
D. plotting 

Answer - Click Here:
B

4. We can be imagined that an or gate is look like ____________

A. Switches connected in parallel
B. Switches connected in series
C. MOS transistors connected in series
D. None of these

Answer - Click Here:
A

5. The change from a current state to the next state is determined by

A. Previous state and outputs
B. Current state and outputs
C. Current state and the inputs
D. Previous state and inputs

Answer - Click Here:
C

6. Each gate take time for delay ______________

A. 2 to 10 ns
B. 3 to 10 ns
C. 1 to 5 ns
D. 3 to 5 ns

Answer - Click Here:
A

7. In Which combination of gates the arbitrary Boolean function is not possible?

A. OR gates and exclusive OR gate only
B. NAND gates only
C. OR gates and NOT gates only
D. OR gates and AND gates only

Answer - Click Here:
D

8. Which one of the following is used to simplify the circuit that determines the next state?

A. State diagram
B. State assignment
C. State reduction
D. Next state table

Answer - Click Here:
A

9. When both inputs are ____________ then NAND latch works.

A. inverted
B. 0
C. 1
D. don’t cares

Answer - Click Here:
C

10.____________adders are needed to construct an m-bit parallel adder.

A. m+1
B. m-1
C. m
D. m/2

Answer - Click Here:
B

11. ________________ is converted by a multiplexer with a register circuit.

A. Serial data to serial
B. Serial data to parallel
C. Parallel data to serial
D. Parallel data to parallel

Answer - Click Here:
C

12. changing in input more than one state is called _______________

A. undefined condition
B. ideal condition
C. reset condition
D. race condition

Answer - Click Here:
D