Digital Electronics Logic Gates Questions and Answers
Digital Electronics Logic Gates questions with answers form the base of circuit design and digital systems. Students preparing for GATE, DRDO, and BARC exams must understand AND, OR, NOT, NAND, NOR, XOR, and XNOR gate operations. Practicing these electronics MCQs improves problem-solving accuracy in truth tables, Boolean algebra, and logic circuit simplification. These programming-style questions with explanations are ideal for both technical interviews and competitive electronics exams.
Covers types and functions of logic gates. Complement with digital electronics combinational logic circuits and boolean algebra
Digital Electronics Logic Gates
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78 questions
31. One advantage TTL has over CMOS is that TTL is ________.
- less expensive
- not sensitive to electrostatic discharge
- faster
- more widely available
32. A 2-input NOR gate is equivalent to a ________.
- negative-OR gate
- negative-AND gate
- negative-NAND gate
- none of the above
33. If a 3-input OR gate has eight input possibilities, how many of those possibilities will result in a HIGH output?
- 1
- 2
- 7
- 8
34. Fan-out is specified in terms of ________.
- voltage
- current
- wattage
- unit loads
35. How many input combinations would a truth table have for a six-input AND gate?
- 32
- 48
- 64
- 128
36. What is the circuit number of the IC that contains four two-input AND gates in standard TTL?
- 7402
- 7404
- 7408
- 7432
37. The terms "low speed" and "high speed," applied to logic circuits, refer to the ________.
- rise time
- fall time
- propagation delay time
- clock speed
38. The NOR logic gate is the same as the operation of the ________ gate with an inverter connected to the output.
- OR
- AND
- NAND
- none of the above
39. With regard to an AND gate, which statement is true?
- An AND gate has two inputs and one output.
- An AND gate has two or more inputs and two outputs.
- If one input to a 2-input AND gate is HIGH, the output reflects the other input.
- A 2-input AND gate has eight input possibilities.
40. The term "hex inverter" refers to:
- an inverter that has six inputs
- six inverters in a single package
- a six-input symbolic logic device
- an inverter that has a history of failure