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  • 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



  • 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
    • Discuss
    • 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
    • Discuss
    • 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
    • Discuss
    • 4. Conversion of an octal number 478 to its binary number is

    • Options
    • A. 1100112
    • B. 1001112
    • C. 1100112
    • D. 11110112
    • E. None of the above
    • Discuss
    • 5. Conversion of binary number 10100002 to an octal number is

    • Options
    • A. 1198
    • B. 1018
    • C. 1118
    • D. 1208
    • E. None of the above
    • Discuss
    • 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
    • Discuss
    • 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
    • Discuss
    • 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
    • Discuss
    • 9. Division of 1000112 by 1012 is

    • Options
    • A. 1002
    • B. 1112
    • C. 1012
    • D. 10102
    • E. None of the above
    • Discuss
    • 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
    • Discuss


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