Boolean Algebra and Logic Circuits Quiz

Which of the following gates is known as a universal gate?

• AND

• OR

• NAND

• XOR

What is the output of an XOR gate when both inputs are 1?

• 0

• 1

• High impedance

• Undefined

The Boolean expression for the output of a NOR gate is:

• A + B

• A • B

• (A + B)'

• (A • B)'

Which of the following is the dual of the Boolean expression AB + A'C?

• A + B • A' + C

• A + B(A' + C)

• (A + B)(A' + C)

• AB • A'C

Which method is best suited for simplifying Boolean expressions with 4 to 6 variables?

• Algebraic method

• Karnaugh Map

• DeMorgan's Theorem

• Truth table

How many outputs does a half adder have?

• 1

• 2

• 3

• 4

What is the main difference between a full adder and a half adder?

• Full adder can add binary numbers

• Full adder has a carry-in input

• Full adder has fewer gates

• Half adder cannot be used in parallel circuits

How many selection lines are required for an 8-to-1 multiplexer?

• 2

• 3

• 4

• 8

A 3-to-8 decoder has how many output lines?

• 3

• 6

• 8

• 24

Which of the following is true about encoders?

• They have more outputs than inputs

• They decode binary information

• They are used for data storage

• They convert inputs into a coded binary output