Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Multiple Choice Questions
Q241: In the NAND-NOR universal gates implementation, how is a NAND gate created using NOR gates?
- A: By using three NOR gates
- B: By using four NOR gates
- C: By using two NOR gates
- D: By using one NOR gate
View Answer
B
Q242: Which gate outputs 1 when all its inputs are 0?
- A: NAND Gate
- B: NOR Gate
- C: AND Gate
- D: XOR Gate
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B
Q243: What does the XOR gate output when its inputs are both 1?
- A: 1
- B: zero
- C: Undefined
- D: High impedance
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B
Q244: What is the output of an XNOR gate when both inputs are the same?
- A: zero
- B: 1
- C: High impedance
- D: Undefined
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B
Q245: Which technology is characterized by high switching speed and high power consumption?
- A: CMOS
- B: TTL
- C: ECL
- D: PMOS
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B
Q246: What does the output of a 3-input NAND gate become when one input is 0?
- A: zero
- B: 1
- C: Undefined
- D: High impedance
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A
Q247: How many inputs does the 74XX86 IC have?
- A: Two
- B: Four
- C: Six
- D: Eight
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A
Q248: What is the main advantage of CMOS technology compared to TTL?
- A: Higher power consumption
- B: Slower switching speed
- C: Higher chip density
- D: Lower chip density
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C
Q249: What is the function of a NOT gate in digital logic circuits?
- A: Inverts the input signal
- B: Performs logical AND
- C: Performs logical OR
- D: Performs logical XOR
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A
Q250: In a washing machine controller using NOR gates, what does the NOR gate output indicate?
- A: Washing machine is functioning normally
- B: Washing machine needs maintenance
- C: Washing machine is overloaded
- D: Washing machine lid is open
View Answer
A