Digital Electronics MCQs (Part-2)

What is the binary equivalent of the decimal number 10?

A 1000
B 1010
C 1100
D 1110

Which logic gate has a high output when any of its inputs are high?

A AND
B OR
C XOR
D NOR

What is the purpose of a truth table in digital electronics?

A To amplify signals
B To simplify logic circuits
C To represent the output of a logic function for all possible inputs
D To design flip-flops

How many inputs are required for a full adder?

A 2
B 3
C 4
D 1

Which of the following is a sequential circuit?

A Multiplexer
B Decoder
C Flip-Flop
D Logic gate

What is the output of a NAND gate when all inputs are 1?

A 1
B 0
C Undefined
D Depends on the inputs

What is the binary equivalent of the decimal number 255?

A 11111110
B 11111111
C 11110000
D 11111101

What is the main characteristic of a combinational circuit?

A Outputs depend on past inputs
B Outputs depend only on current inputs
C It has a memory element
D It uses feedback loops

Which Boolean expression is simplified as Aโ‹…0=0?

A Identity Law
B Nullification Law
C Idempotent Law
D Distributive Law

What is a register in digital electronics?

A A type of memory to store multiple bits of data
B A logic gate
C A counter
D A clock signal

How many states does a 3-bit counter have?

A 6
B 8
C 4
D 16

Which type of circuit is used for priority encoding?

A Encoder
B Decoder
C Multiplexer
D Demultiplexer

What is the resolution of a 4-bit ADC?

A 24
B 1/16
C 1/2
D 1/256

What is the function of an ALU (Arithmetic Logic Unit)?

A To perform arithmetic and logical operations
B To store data
C To generate clock signals
D To convert data

What is the binary addition result of 1101 + 1011?

A 10010
B 11110
C 10110
D 10000

Which flip-flop is called a data or delay flip-flop?

A JK Flip-Flop
B D Flip-Flop
C SR Flip-Flop
D T Flip-Flop

What does VHDL stand for?

A Very High Digital Logic
B Virtual Hardware Description Language
C Very High-Speed Integrated Circuit Hardware Description Language
D Variable High-Level Logic

Which device is used to convert an analog signal into a digital signal?

A DAC
B ADC
C RAM
D ROM

Which sequential device is used to divide a clock frequency by 2?

A Flip-Flop
B Multiplexer
C Decoder
D Counter

What is the purpose of setup time in digital circuits?

A To amplify signals
B To ensure data is stable before the clock edge
C To store data
D To simplify Boolean expressions