# Universal gates (NAND, NOR) Gat MCQs

What is the symbol for the NAND gate?

A) ∧
B) ∨
C) ⊕
D) ↑
What is the output of a NAND gate if both inputs are HIGH (1)?

A) HIGH (1)
B) LOW (0)
C) Unknown
D) Depends on gate configuration
What is the symbol for the NOR gate?

A) ∧
B) ∨
C) ⊕
D) ↓
What is the output of a NOR gate if both inputs are LOW (0)?

A) HIGH (1)
B) LOW (0)
C) Unknown
D) Depends on gate configuration
Which of the following gates is considered a universal gate?

A) AND gate
B) OR gate
C) NAND gate
D) NOR gate
What is the output of a NAND gate if one input is LOW (0) and the other is HIGH (1)?

A) HIGH (1)
B) LOW (0)
C) Unknown
D) Depends on gate configuration
What is the output of a NOR gate if one input is HIGH (1) and the other is LOW (0)?

A) HIGH (1)
B) LOW (0)
C) Unknown
D) Depends on gate configuration
Which gate can be used to implement any logic function?

A) NAND gate
B) NOR gate
C) XOR gate
D) NOT gate
Which gate is also known as a universal building block in digital circuits?

A) NAND gate
B) NOR gate
C) XOR gate
D) NOT gate
What is the output of a NAND gate if both inputs are LOW (0)?

A) HIGH (1)
B) LOW (0)
C) Unknown
D) Depends on gate configuration
What is the output of a NOR gate if one input is LOW (0) and the other is HIGH (1)?

A) HIGH (1)
B) LOW (0)
C) Unknown
D) Depends on gate configuration
Which gate has the complement of its output equivalent to the AND gate?

A) NAND gate
B) NOR gate
C) XOR gate
D) NOT gate
Which gate has the complement of its output equivalent to the OR gate?

A) NAND gate
B) NOR gate
C) XOR gate
D) NOT gate
The output of a NAND gate is LOW (0) only when:

A) Both inputs are LOW (0)
B) Both inputs are HIGH (1)
C) One input is LOW (0) and the other is HIGH (1)
D) One input is HIGH (1) and the other is LOW (0)
The output of a NOR gate is HIGH (1) only when:

A) Both inputs are LOW (0)
B) Both inputs are HIGH (1)
C) One input is LOW (0) and the other is HIGH (1)
D) One input is HIGH (1) and the other is LOW (0)
Which gate is commonly used for simplifying logic expressions?

A) NAND gate
B) NOR gate
C) XOR gate
D) NOT gate
Which gate is commonly used for implementing memory devices?

A) NAND gate
B) NOR gate
C) XOR gate
D) NOT gate
What is the output of a NAND gate if one input is LOW (0) and the other is HIGH (1)?

A) HIGH (1)
B) LOW (0)
C) Unknown
D) Depends on gate configuration
What is the output of a NOR gate if one input is HIGH (1) and the other is LOW (0)?

A) HIGH (1)
B) LOW (0)
C) Unknown
D) Depends on gate configuration
Which gate can be used to implement any logic function, making it universal?

A) NAND gate
B) NOR gate
C) XOR gate
D) NOT gate

## MCQs of Digital Logic Design (DLD)

Introduction to Digital Systems

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

Combinational Circuits

Sequential Logic

Flip-Flops and Latches

Counters and Registers

State Machines

Finite State Machines (FSMs)

1. Moore and Mealy machines MCQs

Memory and Programmable Logic MCQs

Memory Devices

## More MCQs of Digital Logic Design (DLD)

MCQs collection of solved and repeated MCQs with answers for the preparation of competitive exams, admission test and job of PPSC, FPSC, UPSC, AP, APPSC, APSC, BPSC, PSC, GOA, GPSC, HPSC, HP, JKPSC, JPSC, KPSC, KERALAPSC, MPPSC, MPSC, MPSCMANIPUR, MPSC, NPSC, OPSC, RPSC, SPSCSKM, TNPSC, TSPSC, TPSC, UPPSC, UKPSC, SPSC, KPPSC, BPSC, AJKPSC ALPSC, NPSC, LPSC, SCPSC, DPSC, DCPSC, PSC, UPSC, WVPSC, PSCW, and WPSC.