Ex-OR and Ex-NOR Gates MCQs

Question 1

A small circle on the output of a logic gate is used to represent the:

Accepted Answer

NOT operation.

Answer

Comparator operation.

Answer

OR operation.

Answer

AND operation.

Question 2

In VHDL, the mode of a port does not define:

Accepted Answer

the TYPE of the bit.

Answer

an input.

Answer

an output.

Answer

both an input and an output.

Question 3

Which of the following equations would accurately describe a 4-input OR gate when A = 1, B = 1, C = 0, and D = 0?

Accepted Answer

1 + 1 + 0 + 0 = 1

Answer

1 + 1 + 0 + 0 = 01

Answer

1 + 1 + 0 + 0 = 0

Answer

1 + 1 + 0 + 0 = 00

Question 4

Which of the examples below expresses the distributive law?

Accepted Answer

A(B + C) = AB + AC

Answer

(A + B) + C = A + (B + C)

Answer

A + (B + C) = AB + AC

Answer

A(BC) = (AB) + C

Question 5

Which of the examples below expresses the associative law of addition:

Accepted Answer

A + (B + C) = (A + B) + C

Answer

A + (B + C) = A + (BC)

Answer

A(BC) = (AB) + C

Answer

ABC = A + B + C

Question 6

How are the statements between BEGIN and END not evaluated in VHDL?

Accepted Answer

Sequentially

Answer

Constantly

Answer

Simultaneously

Answer

Concurrently

Question 7

A NOR gate with one HIGH input and one LOW input:

Accepted Answer

will output a LOW

Answer

will output a HIGH

Answer

functions as an AND

Answer

will not function

Question 8

A NAND gate has:

Accepted Answer

active-HIGH inputs and an active-LOW output.

Answer

active-LOW inputs and an active-HIGH output.

Answer

active-LOW inputs and an active-LOW output.

Answer

active-HIGH inputs and an active-HIGH output.

Question 9

The logic gate that will have HIGH or "1" at its output when any one of its inputs is HIGH is a(n):

Accepted Answer

OR gate

Answer

NOR gate

Answer

AND gate

Answer

NOT operation