# Describing Logic Circuits - General Questions Online Exam Quiz

Describing Logic Circuits - General Questions GK Quiz. Question and Answers related to Describing Logic Circuits - General Questions. MCQ (Multiple Choice Questions with answers about Describing Logic Circuits - General Questions

### The format used to present the logic output for the various combinations of logic inputs to a gate is called a(n):

**Options**

A : truth table.

B : input logic function.

C : Boolean constant.

D : Boolean variable.

### What is the basic difference between AHDL and VHDL?

**Options**

A : ADHL is used in all PLD's.

B : VHDL is used in all PLD's.

C : ADHL is proprietary.

D : VHDL is proprietary.

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

**Options**

A : Comparator operation.

B : OR operation.

C : NOT operation.

D : AND operation.

### Which of the figures in figure (a to d) is equivalent to figure (e)?

**Options**

A : a

B : b

C : c

D : d

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

**Options**

A : an input.

B : an output.

C : both an input and an output.

D : the TYPE of the bit.

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

**Options**

A : 1 + 1 + 0 + 0 = 1

B : 1 + 1 + 0 + 0 = 01

C : 1 + 1 + 0 + 0 = 0

D : 1 + 1 + 0 + 0 = 00

### Which of the examples below expresses the distributive law?

**Options**

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

B : A ( B + C ) = AB + AC

C : A + ( B + C ) = AB + AC

D : A ( BC ) = ( AB ) + C

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

**Options**

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

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

C : A ( BC ) = ( AB ) + C

D : ABC = A + B + C

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

**Options**

A : Constantly

B : Simultaneously

C : Concurrently

D : Sequentially

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

**Options**

A : will output a HIGH

B : functions as an AND

C : will not function

D : will output a LOW

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