Showing posts with label binary. Show all posts
Showing posts with label binary. Show all posts

Saturday, April 21, 2018

Digital Electronics MCQ


1. Which one is unary gate?
a. NOR                                    b. XNOR                                 c. NOT                                    d. XOR

2. Which binary number is same as 2’s complement of itself?
a. 1001                                   b. 0110                                   c. 1010                                   d. 1000

3. Which is/are used to reduce the Boolean expression?
a. Karnaugh map                                                                  b. Boolean algebra laws
c. Boolean properties                                                          d. All of these

4. What is the Boolean expression of given logic diagram?
a. AB
Image result for digital logic circuit
b. A’B’ + AB
c. (AB)’
d. All of these
5. Race around condition is associated with
a. RS flip flop                        b. JK flip flop                         c. MS flip flop                        d. none of these

6. If X is any input of flip flop, then the expression QX is of___________________________ flip flop.
a. Toggle Flip Flop               b. Delay Flip Flop                 c. MS Flip Flop                      d. RS Flip flop

7. How many flip flops are needed to design MOD-27 counter?
a. 5                                          b. 6                                          c. 4                                          d. 3

8. What is/are the difference between Sequential circuit and combinational circuit?
a. Feedback in sequential circuit                                     
b. Only Universal gates are used to design sequential circuit
c. Sequential circuits are used to design memory.
d. All of the above

9. How many RAM chips are needed to design the main memory capacity of 2MB, where one RAM chip is of the size 512 bytes?
a. 12                                        b. 16                                       c. 9                                          d. 11

10. Determine the effective access time, if the cache access time is 10ns and main memory access time is 110ns?
a. 19ns                                   b. 20ns                                   c. 18ns                                   d. 21ns

Search Aptipedia