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Digital Electronics
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Boolean Algebra and Logic Simplification
Comments
Question
How many gates would be required to implement the following Boolean expression after simplification? XY + X(X + Z) + Y(X + Z)
Options
A. 1
B. 2
C. 4
D. 5
Correct Answer
2
Boolean Algebra and Logic Simplification problems
Search Results
1. The commutative law of addition and multiplication indicates that:
Options
A. we can group variables in an AND or in an OR any way we want
B. an expression can be expanded by multiplying term by term just the same as in ordinary algebra
C. the way we OR or AND two variables is unimportant because the result is the same
D. the factoring of Boolean expressions requires the multiplication of product terms that contain like variables
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Correct Answer: the way we OR or AND two variables is unimportant because the result is the same
2. Determine the values of A, B, C, and D that make the product term
equal to 1.
Options
A. A = 0, B = 1, C = 0, D = 1
B. A = 0, B = 0, C = 0, D = 1
C. A = 1, B = 1, C = 1, D = 1
D. A = 0, B = 0, C = 1, D = 0
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Correct Answer: A = 0, B = 1, C = 0, D = 1
3. The systematic reduction of logic circuits is accomplished by:
Options
A. using Boolean algebra
B. symbolic reduction
C. TTL logic
D. using a truth table
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Correct Answer: using Boolean algebra
4. For the SOP expression
, how many 1s are in the truth table's output column?
Options
A. 1
B. 2
C. 3
D. 5
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Correct Answer: 3
5. How many gates would be required to implement the following Boolean expression before simplification? XY + X(X + Z) + Y(X + Z)
Options
A. 1
B. 2
C. 4
D. 5
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Correct Answer: 5
6. The commutative law of Boolean addition states that
A
+
B
=
A
×
B
.
Options
A. True
B. False
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Correct Answer: False
7. Determine the values of A, B, C, and D that make the sum term
equal to zero.
Options
A. A = 1, B = 0, C = 0, D = 0
B. A = 1, B = 0, C = 1, D = 0
C. A = 0, B = 1, C = 0, D = 0
D. A = 1, B = 0, C = 1, D = 1
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Correct Answer: A = 1, B = 0, C = 1, D = 0
8. A Karnaugh map is a systematic way of reducing which type of expression?
Options
A. product-of-sums
B. exclusive NOR
C. sum-of-products
D. those with overbars
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Correct Answer: sum-of-products
9. The Boolean expression
is logically equivalent to what single gate?
Options
A. NAND
B. NOR
C. AND
D. OR
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Correct Answer: NAND
10. Applying DeMorgan's theorem to the expression
, we get ________
Options
A.
B.
C.
D.
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Correct Answer:
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