Digital logic and design MCQS

Here Are 50 Quizzes / Multiple-Choice Questions (Mcqs) Related To

DIGITAL ELECTRONICS
Along With Their Correct Answers



1. **Question:** What is the fundamental building block of digital circuits?

- A) Resistor

- B) Capacitor

- C) Transistor

- D) Inductor

- **Correct Answer:** C) Transistor



2. **Question:** In a binary number system, what are the possible digits?

- A) 0 and 1

- B) 0 and 9

- C) 1 and 2

- D) 0 and 2

- **Correct Answer:** A) 0 and 1



3. **Question:** Which logic gate performs the NOT operation?

- A) AND gate

- B) OR gate

- C) XOR gate

, - D) NOT gate

- **Correct Answer:** D) NOT gate



4. **Question:** What is the output of an AND gate when both inputs are 1?

- A) 0

- B) 1

- C) Undefined

- D) Depends on other factors

- **Correct Answer:** B) 1



5. **Question:** Which logic gate's output is 1 if and only if exactly one input is
1?

- A) AND gate

- B) OR gate

- C) XOR gate

- D) NOT gate

- **Correct Answer:** C) XOR gate



6. **Question:** How many inputs does a 4-input NAND gate have?

- A) 2

- B) 3

- C) 4

, - D) 5

- **Correct Answer:** C) 4



7. **Question:** Which type of flip-flop has two stable states and is often used
for storing one bit of memory?

- A) D flip-flop

- B) JK flip-flop

- C) SR flip-flop

- D) T flip-flop

- **Correct Answer:** C) SR flip-flop



8. **Question:** What is the purpose of a decoder in digital circuits?

- A) Converts analog to digital signals

- B) Converts binary to decimal numbers

- C) Converts binary code to a specific output line

- D) Converts high voltage to low voltage

- **Correct Answer:** C) Converts binary code to a specific output line



9. **Question:** Which type of memory retains its data even when the power is
turned off?

- A) RAM

- B) ROM