Basic logic operations (AND, OR, NOT) MCQ

By: Prof. Dr. Fazal Rehman | Last updated: June 8, 2024

What is the output of the AND operation when both inputs are 1?

A 0
B 1
C Depends on the inputs
D None of the above
Answer: B 1
What is the output of the OR operation when both inputs are 0?

A 0
B 1
C Depends on the inputs
D None of the above
Answer: A 0
What is the output of the NOT operation when the input is 1?

A 0
B 1
C Depends on the inputs
D None of the above
Answer: A 0
Which of the following is the truth table for the AND operation?

A 00->0, 01->1, 10->1, 11->1
B 00->0, 01->0, 10->0, 11->1
C 00->1, 01->1, 10->1, 11->0
D 00->1, 01->0, 10->0, 11->0
Answer: B 00->0, 01->0, 10->0, 11->1
Which of the following is the truth table for the OR operation?

A 00->0, 01->0, 10->0, 11->1
B 00->0, 01->1, 10->1, 11->1
C 00->1, 01->1, 10->1, 11->0
D 00->1, 01->0, 10->0, 11->0
Answer: B 00->0, 01->1, 10->1, 11->1
Which logic gate inverts its input?

A AND
B OR
C NOT
D NAND
Answer: C NOT
What is the result of the OR operation if one input is 1 and the other is 0?

A 0
B 1
C Depends on the inputs
D None of the above
Answer: B 1
What is the result of the AND operation if one input is 0 and the other is 1?

A 0
B 1
C Depends on the inputs
D None of the above
Answer: A 0
Which logic operation would you use to check if at least one of two conditions is true?

A AND
B OR
C NOT
D XOR
Answer: B OR
What is the binary result of NOT 0?

A 0
B 1
C Depends on the inputs
D None of the above
Answer: B 1
Which logic gate has the following truth table: 00->1, 01->1, 10->1, 11->0?

A AND
B OR
C NOR
D NAND
Answer: D NAND
What is the primary function of the AND gate?

A To invert the input signal
B To output high only if all inputs are high
C To output high if any input is high
D To add binary numbers
Answer: B To output high only if all inputs are high
Which of the following is the output of an OR gate with inputs 1 and 1?

A 0
B 1
C Depends on the inputs
D None of the above
Answer: B 1
What is the result of applying the NOT operation to the binary number 1010?

A 0101
B 1101
C 0010
D 1111
Answer: A 0101
Which logic gate would you use to ensure both conditions must be true for the output to be true?

A AND
B OR
C NOT
D NOR
Answer: A AND
What is the output of the OR operation if both inputs are 1?

A 0
B 1
C Depends on the inputs
D None of the above
Answer: B 1
Which gate outputs a 1 only if both inputs are different?

A AND
B OR
C XOR
D NOT
Answer: C XOR
What is the result of the AND operation on the binary numbers 1100 and 1010?

A 1110
B 1000
C 0100
D 1101
Answer: B 1000
Which gate’s output is true if and only if all its inputs are false?

A AND
B OR
C NOT
D NOR
Answer: D NOR
What is the output of the NOT operation if the input is 0?

A 0
B 1
C Depends on the inputs
D None of the above
Answer: B 1

MCQs of Digital Logic Design (DLD)

Introduction to Digital Systems

1. Analog vs. Digital signals MCQs
2. Binary numbers and arithmetic MCQs
3. Logic levels and noise margins MCQs

Boolean Algebra

1. Basic logic operations (AND, OR, NOT) MCQ
2. Laws and theorems of Boolean algebra MCQ
3. De Morgan’s Theorems MCQ
4. Canonical forms (Sum of Products, Product of Sums) MCQ
5. Simplification techniques (Karnaugh Maps, Quine-McCluskey method) MCQ

Combinational Logic

Logic Gates

1. Basic gates (AND, OR, NOT) Gat MCQ
2. Universal gates (NAND, NOR) Gat MCQs
3. XOR and XNOR gates MCQ

Combinational Circuits

1. Design and analysis of combinational circuits MCQ
2. Multiplexers and Demultiplexers MCQ
3. Encoders and Decoders MCQ
4. Binary Adders (Half adder, Full adder) MCQ
5. Subtractors and Arithmetic Logic Units (ALU) MCQ
6. Comparators MCQ in DLD

Sequential Logic

Flip-Flops and Latches

1. SR Latch, D Latch MCQ
2. Flip-Flops (SR, D, JK, T) MCQ
3. Characteristic equations and excitation tables MCQ
4. Edge-triggered vs. level-triggered devices MCQ

Counters and Registers

1. Synchronous, Asynchronous (ripple), Up/Down counters MCQs
2. Shift registers (SIPO, PISO, SISO, PIPO) MCQs

State Machines

Finite State Machines (FSMs)

1. Moore and Mealy machines MCQs

Memory and Programmable Logic MCQs

Memory Devices

1. Read-Only Memory (ROM)
2. Random Access Memory (RAM)
3. Programmable Logic Devices (PLDs) MCQs
4. Field Programmable Gate Arrays (FPGAs) MCQs

More MCQs of Digital Logic Design (DLD)

• • SET 1: DLD MCQs with answers (dld mcqs with answers)
  • SET 2: DLD MCQs (dld basic mcqs)
  • SET 3: DLD MCQs (solved mcqs of dld)
  • SET 4: DLD MCQs (dld repeated mcqs)
  • SET 5: DLD MCQs (dld important mcqs)
  • SET 6:DLD MCQs DLD Solved MCQs Answers PDF

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