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Digital Electronics
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Digital Arithmetic Operations and Circuits
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Question
Subtract the following binary numbers.
0101 1000
1010 0011
1101 1110
?0010 0011
?0011 1000
?0101 0111
Options
A. 0011 0100 0110 1010 1000 0110
B. 0011 0101 0110 1011 1000 0111
C. 0011 0101 0110 1010 1000 0111
D. 0011 0101 0110 1010 1000 0110
Correct Answer
0011 0101 0110 1011 1000 0111
More questions
1. A good rule of thumb for determining the pin numbers of dual-in-line package IC chips would be to place the notch to your right and pin #1 will always be in the lower right corner.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
2. Which is not a real advantage of HDL?
Options
A. Using higher levels of abstraction
B. Tailoring components to exactly fit the needs of the project
C. The use of graphical tools
D. Using higher levels of abstraction and tailoring components to exactly fit the needs of the project
Show Answer
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Correct Answer: The use of graphical tools
3. What is the significance of the
J
and
K
terminals on the J-K flip-flop?
Options
A. There is no known significance in their designations.
B. The
J
represents "jump," which is how the
Q
output reacts whenever the clock goes high and the
J
input is also HIGH.
C. The letters were chosen in honor of Jack Kilby, the inventory of the integrated circuit.
D. All of the other letters of the alphabet are already in use.
Show Answer
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Discuss
Correct Answer: The letters were chosen in honor of Jack Kilby, the inventory of the integrated circuit.
4. What is used to graphically show the time relationship between two or more digital waveforms?
Options
A. reference diagram
B. timing diagram
C. voltage curve
D. load line
Show Answer
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Discuss
Correct Answer: timing diagram
5. How many BCD code bits and how many straight binary bits would be required to represent the decimal number 643?
Options
A. 12 BCD, 12 binary
B. 12 BCD, 10 binary
C. 12 BCD, 9 binary
D. 16 BCD, 9 binary
Show Answer
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Discuss
Correct Answer: 12 BCD, 10 binary
6. The term hold always means ________.
Options
A.
B.
C.
D. no change
Show Answer
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Discuss
Correct Answer: no change
7. A pulse is not perfectly square; it takes time for the digital level to rise from 0 up to 1 and to fall from 1 down to 0.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
8. Convert hexadecimal C0B to binary.
Options
A. 110000001011
B. 110000001001
C. 110000001100
D. 110100001011
Show Answer
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Discuss
Correct Answer: 110000001011
9. The comments in ADHL are enclosed between # characters.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: False
10. The EPM 7128S is a(n) ________ device.
Options
A. PLD
B. JTAG
C. EEPROM
D. ISP
Show Answer
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Discuss
Correct Answer: ISP
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