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Logic Circuit Simplification
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Question
The commutative law of addition and multiplication indicates that:
Options
A. the way we OR or AND two variables is unimportant because the result is the same
B. we can group variables in an AND or in an OR any way we want
C. an expression can be expanded by multiplying term by term just the same as in ordinary algebra
D. the factoring of Boolean expressions requires the multiplication of product terms that contain like variables
Correct Answer
the way we OR or AND two variables is unimportant because the result is the same
Logic Circuit Simplification problems
Search Results
1. Logically, the output of a NOR gate would have the same Boolean expression as a(n):
Options
A. NAND gate immediately followed by an INVERTER
B. OR gate immediately followed by an INVERTER
C. AND gate immediately followed by an INVERTER
D. NOR gate immediately followed by an INVERTER
Show Answer
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Correct Answer: OR gate immediately followed by an INVERTER
2. The observation that a bubbled input OR gate is interchangeable with a bubbled output AND gate is referred to as:
Options
A. a Karnaugh map
B. DeMorgan's second theorem
C. the commutative law of addition
D. the associative law of multiplication
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Correct Answer: DeMorgan's second theorem
3. Which of the examples below expresses the distributive law of Boolean algebra?
Options
A. A ? (B ? C) = (A ? B) + C
B. A + (B + C) = (A ? B) + (A ? C)
C. A ? (B + C) = (A ? B) + (A ? C)
D. (A + B) + C = A + (B + C)
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Correct Answer: A ? (B + C) = (A ? B) + (A ? C)
4. One of DeMorgan's theorems states that
. Simply stated, this means that logically there is no difference between:
Options
A. a NAND gate and an AND gate with a bubbled output
B. a NOR gate and an AND gate with a bubbled output
C. a NOR gate and a NAND gate with a bubbled output
D. a NAND gate and an OR gate with a bubbled output
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Correct Answer: a NOR gate and an AND gate with a bubbled output
5. Which of the following expressions is in the sum-of-products (SOP) form?
Options
A. Y = (A + B)(C + D)
B. Y = AB(CD)
C.
D.
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Correct Answer:
6. Once a PAL has been programmed:
Options
A. it cannot be reprogrammed.
B. its outputs are only active HIGHs
C. its outputs are only active LOWs
D. its logic capacity is lost
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Correct Answer: it cannot be reprogrammed.
7. Which type of PLD should be used to program basic logic functions?
Options
A. PLA
B. PAL
C. CPLD
D. SLD
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Correct Answer: PAL
8. The complex programmable logic device (CPLD) contains several PLD blocks and:
Options
A. field-programmable switches
B. AND/OR arrays
C. a global interconnection matrix
D. a language compiler
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Correct Answer: a global interconnection matrix
9. PLAs, CPLDs, and FPGAs are all which type of device?
Options
A. SLD
B. PLD
C. EPROM
D. SRAM
Show Answer
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Correct Answer: PLD
10. The content of a simple programmable logic device (PLD) consists of:
Options
A. fuse-link arrays
B. thousands of basic logic gates
C. advanced sequential logic functions
D. thousands of basic logic gates and advanced sequential logic functions
Show Answer
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Correct Answer: thousands of basic logic gates and advanced sequential logic functions
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