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Discussion
Home
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Digital Electronics
‣
Digital Arithmetic Operations and Circuits
See What Others Are Saying!
Question
Binary multiplication is like decimal multiplication except you deal only with 1s and 0s.
Options
A. True
B. False
Correct Answer
True
More questions
1. Propagation delay is important because ________.
Options
A. the logic gates must be given a short break during each clock cycle or else they will overheat
B. it limits the maximum operating frequency of a gate
C. it is a measure of how long the clock must be applied to the gate before it will make the required decision
D. all the gates in a system must have the same propagation times in order to be compatible
Show Answer
Scratch Pad
Discuss
Correct Answer: the logic gates must be given a short break during each clock cycle or else they will overheat
2. The carry propagation can be expressed as ________.
Options
A. C
p
= AB
B. C
p
= A + B
C.
D.
Show Answer
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Discuss
Correct Answer: C
p
= A + B
3. The odd/even parity system would require a sixth bit to be added to a 4-bit system.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
4. In a digital storage scope, when memory is full, the next data point is lost.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
5. A D flip-flop utilizing a PGT clock is in the CLEAR state. Which of the following input actions will cause it to change states?
Options
A.
CLK
= NGT,
D
= 0
B.
CLK
= PGT,
D
= 0
C. CLOCK NGT,
D
= 1
D. CLOCK PGT,
D
= 1
E.
CLK
= NGT,
D
= 0, CLOCK NGT,
D
= 1
Show Answer
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Discuss
Correct Answer: CLOCK PGT,
D
= 1
6. What is the difference between combinational logic and sequential logic?
Options
A. Combinational circuits are not triggered by timing pulses, sequential circuits are triggered by timing pulses.
B. Combinational and sequential circuits are both triggered by timing pulses.
C. Neither circuit is triggered by timing pulses.
Show Answer
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Discuss
Correct Answer: Combinational circuits are not triggered by timing pulses, sequential circuits are triggered by timing pulses.
7. There are four different logic level ranges for TTL and CMOS: V
IL
, V
IH
, V
OL
, and V
OH
.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
8. One method of troubleshooting involves ________ the circuit under test with a ________ or ________ and then observing the output to check for proper bit patterns.
Options
A. checking, voltmeter, ohmmeter
B. exercising, stimulus, test pattern
C. testing, scope, logic analyzer
D. smashing, hammer, axe
Show Answer
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Discuss
Correct Answer: exercising, stimulus, test pattern
9. A demultiplexer is a device that converts some code to a recognizable number or character.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: False
10. What distinguishes the look-ahead-carry adder?
Options
A. It is slower than the ripple-carry adder.
B. It is easier to implement logically than a full adder.
C. It is faster than a ripple-carry adder.
D. It requires advance knowledge of the final answer.
Show Answer
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Discuss
Correct Answer: It is faster than a ripple-carry adder.
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