Combinational Circuits Quiz

What is the primary function of a combinational circuit?

• It stores data

• It produces an output based on the present input

• It uses feedback loops

• It performs arithmetic operations over time

Which of the following is an example of a combinational circuit?

• Flip-flop

• Counter

• Multiplexer

• Register

What is the main purpose of an adder in digital circuits?

• To compare two binary numbers

• To perform addition of binary numbers

• To perform subtraction of binary numbers

• To generate random numbers

How many inputs does a 2-bit full adder have?

• 2

• 3

• 4

• 6

Which of the following gates are used to construct an XOR adder?

• AND and OR gates

• NAND and NOT gates

• XOR and AND gates

• OR and NOR gates

What is the carry-out in a half-adder?

• The result of the addition

• The overflow bit from the sum

• The most significant bit

• An additional sum bit

In a 4-to-1 multiplexer, how many selection lines are needed to select one of the 4 inputs?

• 2

• 3

• 4

• 5

What is the primary function of a multiplexer?

• To select one input from multiple inputs

• To compare two values

• To add two binary numbers

• To encode a binary number

What type of logic circuit is used to implement a decoder?

• XOR

• AND

• OR

• NOT

A 2-to-4 decoder has how many output lines?

• 2

• 3

• 4

• 6