Digital Logic Design MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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What does a NOR gate output when both inputs are true?
A. False
B. True
C. Zero
D. Undefined
Answer: False
Which logic gate is used to perform addition in binary arithmetic?
A. XOR gate
B. AND gate
C. OR gate
D. NAND gate
Answer: XOR gate
What is the main function of a multiplexer?
A. To select one of many input signals and forward it to a single output line
B. To store data
C. To perform arithmetic operations
D. To invert signals
Answer: To select one of many input signals and forward it to a single output line
What is the characteristic of a combinational logic circuit?
A. Its output depends only on the current inputs
B. Its output depends on the previous inputs
C. It has memory elements
D. It can store data
Answer: Its output depends only on the current inputs
Which of the following is a type of flip-flop?
A. D flip-flop
B. NAND gate
C. NOR gate
D. AND gate
Answer: D flip-flop
Which gate outputs true only when exactly one of its inputs is true?
A. XOR gate
B. AND gate
C. OR gate
D. NOR gate
Answer: XOR gate
What is the purpose of a flip-flop in digital circuits?
A. To store binary data
B. To amplify signals
C. To filter signals
D. To convert analog to digital signals
Answer: To store binary data
What does a NOT gate do to its input signal?
A. Inverts it
B. Passes it unchanged
C. Doubles it
D. Halves it
Answer: Inverts it
Which logic gate performs the inverse operation of an AND gate?
A. NAND gate
B. NOR gate
C. XOR gate
D. AND gate
Answer: NAND gate