Digital Electronics MCQs (Part-3)

Which logic gate is known as the universal gate?

A AND
B OR
C NAND
D XOR

What is the decimal equivalent of the binary number 110111011101?

A 10
B 11
C 12
D 13

What is the output of an XNOR gate when both inputs are the same?

A 0
B 1
C Undefined
D Depends on inputs

Which Boolean algebra property is represented by A+B=B+A?

A Commutative Law
B Distributive Law
C Associative Law
D Absorption Law

What is the primary function of a demultiplexer?

A Combine multiple inputs into one output
B Amplify the signal
C Divide one input into multiple outputs
D Store data

What type of counter increments or decrements by one?

A Ring Counter
B Johnson Counter
C Up/Down Counter
D Asynchronous Counter

Which flip-flop is used in shift registers?

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

What is the purpose of a clock signal in synchronous circuits?

A To perform logical operations
B To control the speed of data processing
C To store data permanently
D To amplify signals

Which memory device loses data when power is turned off?

A ROM
B RAM
C Flash Memory
D EEPROM

Which component is used for binary addition in a digital circuit?

A Multiplexer
B Decoder
C Half Adder
D Shift Register

What is the simplified expression for A⋅(A+B) in Boolean algebra?

A A⋅B
B A+B
C 0
D A

What is the main advantage of using Karnaugh maps?

A Designing circuits
B Minimizing Boolean expressions
C Storing data
D Generating clock signals

What type of signal does an ADC convert into?

A Analog
B Digital
C Sinusoidal
D Binary only

Which of the following is a volatile memory?

A ROM
B EEPROM
C RAM
D Flash Memory

What is the primary difference between SRAM and DRAM?

A SRAM is faster and uses more power than DRAM
B DRAM is faster and uses less power than SRAM
C Both are non-volatile memories
D DRAM is more expensive than SRAM

What is the function of a finite state machine (FSM)?

A Perform arithmetic operations
B Store data temporarily
C Model and control sequential logic
D Amplify signals

Which memory type is used for booting a computer?

A RAM
B ROM
C Cache Memory
D EEPROM

What is the binary representation of -5 in 2’s complement for 4 bits?

A 1101
B 1011
C 1111
D 0101

What is the purpose of a digital filter?

A Amplify the signal
B Perform logical operations
C Store data
D Remove unwanted frequency components

What is the advantage of FPGA over traditional ICs?

A Fixed functionality
B Programmable for different applications
C Cheaper than microcontrollers
D Lower power consumption