Q1: MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which Boolean equation results from this Karnaugh map?
A) (AB) + (B C) + (BC)
B) (AB) + (AB) + (B C)
C) A B + AC + BC
D) (A B) + (AB) + (BC)
Answer: C 2) Which Boolean equation results from this Karnaugh map?
A) (AB) + (BC)
B) (ABC) + C
C) (AB) + C
D) (A B) + (AC) + (BC)
Answer: C 3) Which Boolean equation results from this Karnaugh Map?
A) (AB C D) + (A BD) + (AD) + (CD)
B) (AB C) + (A BCD) + (AD) + (CD)
C) (A B CD) + (ABD) + (A D) + (BD)
D) (AB C D) + (ABC) + (AD) + (BD)
Answer: D 4) How many NAND gates does it take to make a NOR gate? A) 1 B) 2 Answer: D 1
C) 3
D) 4
5) What is the correct output for this XNOR truth table? A 0 0 1 1
B 0 1 0 1
X
A) X = 1 0 0 1
B) X = 0 1 1 1
C) X = 1 1 1 0
D) X = 0 1 1 0
Answer: A 6) During which time interval(s) will output X of this XNOR timing diagram be HIGH?
A) time intervals 2, 3, and 4 C) time interval 5
B) time intervals 1 and 5 D) time interval 1
Answer: D 7) What is the correct set of output values for this XOR truth table? A 0 0 1 1
B 0 1 0 1
X
A) X = 0 0 0 1
B) X = 0 0 1 1
C) X = 0 1 1 1
D) X = 0 1 1 0
Answer: D 8) When the inputs to an exclusive-NOR gate are unequal, the output is A) zero. B) HIGH. C) one.
D) cannot tell
Answer: A 9) The Boolean equation for the exclusive-NOR function is A) X = AB + A B.
B) X = AB + AB.
C) X = A + B + A + B.
D) X = A + B.
Answer: A 10) When the inputs to an exclusive-OR gate are the same logic level, the output is A) zero. B) one. C) HIGH. Answer: A 2
D) cannot tell
11) The Boolean equation for the exclusive-OR function is A) X = AB + AB.
B) X = AB + AB.
C) X = AB + AB.
D) X = A B + AB.
Answer: C 12) During which time interval(s) will output X of this XOR timing diagram be HIGH?
A) time interval 3 C) time intervals 1, 4, and 5
B) time intervals 1, 3, and 5 D) time intervals 2 and 4
Answer: C 13) During which time interval(s) will output X of this XOR timing diagram be LOW?
A) time interval 1 C) time intervals 3 and 4
B) time interval 2 D) time intervals 4 and 5
Answer: B 14) The simplest form of X = A + AB + ABC is ________. A) X = BC
B) X = ABC
C) X = AB
Answer: D 15) Which Boolean equation results from this Karnaugh Map?
A) (ACD) + (BC D) + (B C)
B) (ABD) + (ACD) + (CD)
C) (ABD) + (B CD) + (CD)
D) (ACD) + (BCD) + (CD)
Answer: D
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D) X = A + B
16) Which Boolean equation results from this Karnaugh map?
A) (AC) + (A B) + (B C)
B) (AB) + (BC) + (B C)
C) (AB) + (BC) + (B C)
D) (AB) + (AC) + (BC)
Answer: B
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