Electronics and Communication Engineering - Digital Electronics

16.

Boolean expression for the output of XNOR (Equivalent) logic gate with inputs A and B is

A.	AB + AB
B.	AB + AB
C.	(A + B). (A + B)
D.	(A + B). (A + B)

Answer: Option C

Explanation:

(A + B) (A + B) = A ⊕ B.

17.

An SR flip flop can be built using NOR gates or NAND gates.

A.	True
B.	False

Answer: Option A

Explanation:

18.

In the given figure R_C = R_L = 1 kΩ, then V₀ =

A.	5 V
B.	2.5 V
C.	1 V
D.	0 V

Answer: Option B

Explanation:

Transistor is off. .

19.

A 14 pin NOT gate 1C has __________ NOT gates.

A.	8
B.	6
C.	5
D.	4

Answer: Option B

Explanation:

6 Input pins, 6 output pins, 1 supply pin and 1 ground pin. Hence 6 NOT gates.

20.

F's complement of (2BFD)_hex is

A.	E 304
B.	D 403
C.	D 402
D.	C 403

Answer: Option C

Explanation:

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