Basic of ADE B Section

How many entries will be in the truth table of a 4-input NAND gate?

• 6

• 8

• 32

• 16

Which of these sets of logic gates are known as universal gates?

• XOR, NAND, OR

• OR, NOT, XOR

• NOR, NAND, XNOR

• NOR, NAND

What is the addition of the binary number 101001+ 010011=?

• 010100

• 111100

• 000111

• 101110

In the toggle mode, a JK flip-flop has

• J = 0, K = 1

• J = 1, K = 1

• J = 0, K = 0

• J = 1, K = 0

A digital circuit that can store only one bit is a

• Register

• NOR gate

• Flip Flop

• XOR gate

DeMorgan's Law states that

• (A+B)' = A'*B

• (AB)' = A' + B'

• (AB)' = A' + B

• (AB)' = A + B

Suppose the output of an XNOR gate is 1. Which of the given input combination is correct?

• A = 0, B' = 1

• A = 1, B = 1

• A = 0, B = 1

• A = 0, B = 0

The number of inputs in a half adder is?

• 2

• 8

• 6

• 4

What is a multiplexer?

• It is a type of decoder which decodes several inputs and gives one output

• A multiplexer is a device which converts many signals into one

• It takes one input and results into many output

• It is a type of encoder which decodes several inputs and gives one output

What is the function of an enable input on a multiplexer chip?

• To apply Vcc

• To connect ground

• To active the entire chip

• To active one half of the chip