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Comments
Question
The 2's compliment of binary number 010111.1100 is
Options
A. 101001.1100
B. 101000.0100
C. 010111.0011
D. 101000.0011
E. None of the above
Correct Answer
101000.0100
Digital Computer Electronics problems
Search Results
1. The control and arithmetic-logic sections are called the _____
Options
A. Block diagram
B. Control Unit
C. Input / Output Unit
D. Central Processing Unit
E. None of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: Central Processing Unit
2. The EXCLUSIVE - NOR gate is equivalent to an _____ gate followed by an invertor.
Options
A. OR
B. AND
C. NAND
D. XOR
E. None of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: XOR
3. If a microcomputer has a 64K memory, what are the hexadecimal notations for the first and last memory location?
Options
A. 0000, EEEE
B. 0, 64
C. 0000, FFFF
D. 0000, 9999
E. None of the above
Show Answer
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Discuss
Correct Answer: 0000, FFFF
4. Conversion of binary number 110001
2
to its decimal number is
Options
A. 27
10
B. 49
10
C. 39
10
D. 50
10
E. None of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: 49
10
5. The ASCII code is a 7-bit code for
Options
A. letters
B. numbers
C. other symbols
D. All of the above
E. None of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: All of the above
6. 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
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Discuss
Correct Answer: 120
8
7. 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
8. 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
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Discuss
Correct Answer: high
9. 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
10. 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
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