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