Exam
Name___________________________________

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1)

Using Boolean algebra to simplify the expression Z = AB + A(B + C) + B(B + C), the completed first step would result in the expression:

1)

_______
A)

Z = AB + ABAC + BB + BC
B)

Z = AA + AB + AB + AC + BB + BC
C)

Z = AB + AB + AC + BB + BC
D)

Z = AB + AB + C + BB + C 2)

Which of the following voltage ranges defines acceptable low-level input for a CMOS IC?

2)

_______
A)

0 - 2 V

B)

2 - 5 V

C)

0 - 0.8 V

D)

0 - 1.5 V 3)

Simplifying logic circuits results in:

3)

_______
A)

fewer connections.

B)

fewer gates.
C)

fewer potential faults .

D)

all of the above 4)

The input combination of A = 1, B = 0, C = 0, and D = 1 would be represented on a Karnaugh map by the square labeled:

4)

_______
A)

A

B)

ABCD

C)

A D

D)

BCD 5)

A logic circuit contains the following: a 3-input NOR gate with inputs A, B, and C, a 2-input NOR gate with inputs C and D, and a 2-input AND gate that is driven by the NOR gate outputs. The correct Boolean expression for the circuit output (X) is:

5)

_______
A)

X =() ()

B)

X =
C)

X =(A + B + C) (C + D)

D)

X = + 6)

The logic gate that produces a HIGH output whenever its two inputs are unequal is the:

6)

_______
A)

NOR.

B)

NAND.
C)

Exclusive OR.

D)

Exclusive NOR. 7)

Using Boolean algebra, the expression Y = C + BC + AC + ABC simplifies to:

7)

_______
A)

Y = B C + C + A C

B)

Y = BC + C
C)

Y = BC + (B) + +

D)

Y = C 8)

The application of DeMorgan's theorems will reduce the