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Digital Electronics
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Digital Concepts
See What Others Are Saying!
Question
In a positive logic system, the logic LOW could be between 0 V and 0.8 V.
Options
A. True
B. False
Correct Answer
True
More questions
1. The concurrent section of the hardware description is where the ________ are interconnected.
Options
A. functions
B. components
C. circuits
D. macrofunctions
Show Answer
Scratch Pad
Discuss
Correct Answer: components
2. Output 6 of a 74138 octal decoder is selected when it is enabled by a data input of:
A
0
= 1
A
1
= 1
A
2
= 0
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: False
3. Assume a ROM to be tested is compared with a known good ROM. If the checksums differ, the ROM is ________.
Options
A. very likely to be good
B. definitely good
C. very likely to be bad
D. definitely bad
Show Answer
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Discuss
Correct Answer: definitely bad
4. The most common TTL series ICs are:
Options
A. E-MOSFET
B. 7400
C. quad
D. AC00
Show Answer
Scratch Pad
Discuss
Correct Answer: 7400
5. Microcontrollers often have:
Options
A. CPUs
B. RAM
C. ROM
D. all of the above
Show Answer
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Discuss
Correct Answer: all of the above
6. Before an SOP implementation, the expression
would require a total of how many gates?
Options
A. 1
B. 2
C. 4
D. 5
Show Answer
Scratch Pad
Discuss
Correct Answer: 5
7. The outputs of a 7485 four-bit magnitude comparator when the inputs are
A
= 0110 and
B
= 1010 are:
A
<
B
is 1
A
=
B
is 0
A
>
B
is 1
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
8. How many outputs are on a BCD decoder?
Options
A. 4
B. 16
C. 8
D. 10
Show Answer
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Discuss
Correct Answer: 10
9. The GAL16V8 has eight dedicated input pins.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
10. The Boolean expression AB + CD is an example of ________.
Options
A. PAL
B. GAL
C. SOP
D. POS
Show Answer
Scratch Pad
Discuss
Correct Answer: SOP
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