Digital Logic Design Quiz

Which of the following is NOT a combinational circuit?

• Multiplexer

• Decoder

• Flip-Flop

• Full Adder

Sequential circuits differ from combinational circuits in that they have:

• Only outputs

• Memory elements

• Only inputs

• No logic gates

Which law states that A + 0 = A?

• Idempotent Law

• Identity Law

• Null Law

• Inverse Law

What is the result of A + A'?

• 0

• A

• 1

• A'

According to De Morgan's Theorem: (AB)' =

• A' + B'

• A + B

• A'B'

• A' + B

Which logic gate has the output 1 only when all inputs are 0?

• AND

• OR

• NAND

• NOR

If the output column of a truth table is all 0s, the Boolean function is:

• Constant 1

• Constant 0

• NOT gate

• OR gate

Which logic gate is known as the “Universal Gate”?

• AND

• OR

• NAND

• NOT

To build a NOT gate using NAND gates, how many NAND gates are required?

• 1

• 2

• 3

• 4

Binary addition of 1 + 1 gives:

• 10

• 1

• 11

• 0