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Worksheets

Logic Gates and Circuits

Total questions: 30

Worksheet time: 17mins

Name
Class
Date
1.
Which logic gate is this?
a)
AND
b)
NOR
c)
NOT
d)
OR
2.
Which logic gate is this?
a)
AND
b)
OR
c)
XOR
d)
NOT
3.
Which truth table is this?
a)
NOT
b)
AND
c)
OR
d)
NAND
4.
Which truth table is this?
a)
AND
b)
OR
c)
NOT
d)
NOR
5.
Which truth table is this?
a)
OR
b)
NOR
c)
XOR
d)
AND
6.

True or False:

NOT gates can only have one input

a)

True

b)

False

7.

Which logic gate is this?

a)

AND

b)

OR

c)

NOT

8.

Which logic gate is this?

a)

AND

b)

NOT

c)

OR

9.

What will this gate's output be?

a)

0

b)

1

10.

What will this gate's output be?

a)

0

b)

1

11.

What will this gate's output be?

a)

0

b)

1

12.

What is the Logic Expression for this circuit?

a)

Z = NOT (A AND B)

b)

Z = NOT (A OR B)

c)

Z = (NOT A) AND B

d)

Z = (NOT A) OR B

13.

How many different combinations of 1 and 0 are possible with 2 bits?

a)

2

b)

4

c)

6

d)

8

14.
An OR gate has
a)
Two inputs and one output
b)
One input and one output
c)
One input and two outputs
d)
Two inputs and two outputs
15.
What is the output of an OR gate if the inputs are 1 and 0?
a)
0
b)
1
c)
OFF
d)
2
16.
What is the output of an AND gate if the inputs are 1 and 0?
a)
ON
b)
2
c)
1
d)
0
17.
There are three fundamental operations in Boolean Algebra: ___
a)
Addition, Subtraction and Multiplication
b)
NOT, AND, and OR
c)
IF, AND, and BUT
d)
IF, ELSE and ELSE IF
18.
A truth table lists every possible combination of input and the resulting output
a)
True
b)
False
19.

The output of a gate is only 1 when both inputs are 1

a)

OR

b)

NOT

c)

NAND

d)

AND

20.

Simple circuits that make logical calculations to get an output are ____.

a)

Truth tables

b)

AND circuit

c)

Logic gates

d)

Half-adder circuit

21.

Write out the Boolean expression.

a)

Q=NOT(A AND B)

AND C

b)

Q=NOT(C AND B)

AND C

c)

Q=OR(A)

AND C

d)

Q=NOT(B)

OR Cd

22.
a)

A=1 B=1 Q=0

b)

A=0 B=1 Q=1

c)

A=1 B=1 Q=1

d)

A=0 B=0 Q=1

23.
a)

1,1,1,0

b)

0,0,01

c)

1,0,0,1

d)

1,1,1,1

24.

1.Which of the following statement is FALSE about logic gates?

a)

A.Logic gates are the building blocks of electronic circuits.

b)

B.It used in computer components like memory.

c)

C.Combination of logic gates is called a logic circuit.

d)

D.Logic gates understand the binary language.

e)

E.None of the above.

25.

When is the output for OR gate TRUE?

a)

A.When both inputs are TRUE.

b)

B.When at least one of the inputs is TRUE.

c)

C.When both inputs are FALSE

d)

D.When at least one of the inputs is FALSE.

26.

For AND, when is it TRUE?

a)

false AND false

b)

true AND false

c)

false AND true

d)

true AND true

27.

What type of logic gate is this table showing?

a)

AND

b)

OR

c)

NOT

28.

What is the missing word?

The ________ gate will only output 1 if

both inputs are 1, otherwise the

output will be 0.

a)

AND

b)

OR

c)

NAND

d)

NOT

29.

What is the truth table for this combination of logic gates?

a)
b)
c)
d)
30.

What is the Logic Expression for this circuit?

a)

Z = NOT (A AND B)

b)

Z = NOT (A OR B)

c)

Z = (NOT A) AND B

d)

Z = (NOT A) OR B