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Comments
Question
How many full adders are required to construct an m- bit parallel adder?
Options
A. m/2
B. m-1
C. m
D. m+1
E. None of the above
Correct Answer
m
Digital Computer Electronics problems
Search Results
1. The output of the following gate is 0 only if at least one of the inputs is 1:
Options
A. AND gate
B. OR gate
C. EX-OR gate
D. NOR gate
E. None of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: NOR gate
2. Which TTL sub-family has maximum speed?
Options
A. standard TTL
B. schottky-clamped TTL
C. high speed TTL
D. low power TTL
E. None of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: schottky-clamped TTL
3. The OR gate has two or more input signals. If any input is _____ the output is high.
Options
A. low
B. high
C. 0
D. All of the above
E. None of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: high
4. Conversion of an octal number 47
8
to its binary number is
Options
A. 110011
2
B. 100111
2
C. 110011
2
D. 1111011
2
E. None of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: 100111
2
5. Conversion of binary number 1010000
2
to an octal number is
Options
A. 119
8
B. 101
8
C. 111
8
D. 120
8
E. None of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: 120
8
6. The dynamic race hazard problem occurs in
Options
A. combinational circuits only
B. sequential circuits only
C. both combinational and sequential circuits
D. none of the combinational and sequential circuits
E. None of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: none of the combinational and sequential circuits
7. What logic function is obtained by adding an inverter to the output of an AND gate?
Options
A. OR
B. NAND
C. XOR
D. NOR
E. None of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: NAND
8. Semiconductor memory is:
Options
A. somewhat slower than magnetic core memory
B. a volatile memory
C. somewhat larger than the magnetic core memory
D. All of the above
E. None of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: a volatile memory
9. Division of 100011
2
by 101
2
is
Options
A. 100
2
B. 111
2
C. 101
2
D. 1010
2
E. None of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: 111
2
10. In boolean algebra, the times sign stands for the _____ operation
Options
A. AND
B. OR
C. NAND
D. NOR
E. None of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: AND
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