Electronics Logic Gates Questions and Answers

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Q1
The output will be a LOW for any case when one or more inputs are zero in a(n):
  • A OR gate
  • B NOT gate
  • C AND gate
  • D NAND gate
Answer: Option C
Q2
If a signal passing through a gate is inhibited by sending a low into one of the inputs, and the output is HIGH, the gate is a(n):
  • A AND
  • B NAND
  • C NOR
  • D OR
Answer: Option B
Q3
A single transistor can be used to build which of the following digital logic gates?
  • A AND gates
  • B OR gates
  • C NOT gates
  • D NAND gates
Answer: Option C
Q4
The logic gate that will have HIGH or "1" at its output when any one of its inputs is HIGH is a(n):
  • A OR gate
  • B AND gate
  • C NOR gate
  • D NOT gate
Answer: Option A
Q5
How many NAND circuits are contained in a 7400 NAND IC?
  • A 1
  • B 2
  • C 4
  • D 8
Answer: Option C
Q6
Exclusive-OR (XOR) logic gates can be constructed from what other logic gates?
  • A OR gates only
  • B AND gates and NOT gates
  • C AND gates, OR gates, and NOT gates
  • D OR gates and NOT gates
Answer: Option C
Q7
How many truth table entries are necessary for a four-input circuit?
  • A 4
  • B 8
  • C 12
  • D 16
Answer: Option D
Q8
A NAND gate has:
  • A LOW inputs and a LOW output
  • B HIGH inputs and a HIGH output
  • C LOW inputs and a HIGH output
  • D None of the these
Answer: Option C
Q9
The basic logic gate whose output is the complement of the input is the:
  • A OR gate
  • B AND gate
  • C INVERTER gate
  • D comparator
Answer: Option C
Q10
What input values will cause an AND logic gate to produce a HIGH output?
  • A At least one input is HIGH.
  • B At least one input is LOW.
  • C All inputs are HIGH.
  • D All inputs are LOW.
Answer: Option C

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