300+ TOP MCQs on Digital Electronics and Answers

NEET  Physics is the very imporatant paper in the Medical Entrance EXAM. So these NEET Physics MCQs with Answers for all Concepts as per the new syllabus. Practice daily with these NEET Physics objective questions on air pollution knowledge & problem-solving skills along with time management. NEET Physics Digital Electronics Multiple Choice Questions

MCQs on Digital Electronics :

1. The following truth table corresponds to the logic gate

Input Output
A B X
0 0 0
0 1 1
1 1 1
1 0 1

(A) NAND
(B) OR
(C) AND
(D) XOR

Answer

Answer: (B) OR

2. Boolean Algebra is essentially based on
(A) Truth
(B) Logic
(C) Symbol
(D) Numbers

Answer

Answer: (B) Logic

3. The logic behind NOR gate is that it gives
(A) HIgh output when both the inputs are low
(B) Low output when both the inputs are low
(C) HIgh output when both the inputs are high
(D) None of the above

Answer

Answer: (A) HIgh output when both the inputs are low

4. A logic gate is an electronic circuit which
(A) Makes logic decisions
(B) Allows electrons flow only in one direction
(C) Woks binary algebra
(D) Alternates between 0 and 1 values

Answer

Answer: (A) Makes logic decisions

5. How many NAND gates are used to form an AND gate?
(A) 1
(B) 2
(C) 3
(D) 4

Answer

Answer: (B) 2

6. Which logic gate is represented by the following combination of logic gates?
Digital Electronics MCQs For NEET
(A) OR
(B) NAND
(C) AND
(D) NOR

Answer

Answer: (C) AND

7. The output of OR gate is 1
(A) If both inputs are zero
(B) If either or both inputs are 1
(C) Only if both inputs are 1
(D) If either input is zero

Answer

Answer: (B) If either or both inputs are 1

8. Which of the following logic gate is a universal gate?
(A) OR
(B) NOT
(C) AND
(D) NOR

Answer

Answer: (D) NOR

9. A gate in which all the inputs must be low to get a high output is
(A) NAND gate
(B) Inverter
(C) NOR gate
(D) AND gate

Answer

Answer: (B) and (C) Inverter and NOR gate

10. The outputs of a NAND gate is 0
(A) If both inputs are 0
(B) If one input is 0 and the other input is 1
(C) If both inputs are 1
(D) If both inputs are 1 or one of the inputs is 1 and the other one is 0

Answer

Answer: (C) If both inputs are 1

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