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  • Question
  • In which of the following adder circuits, the carry look ripple delay is eliminated?


  • Options
  • A. Half adder
  • B. Full adder
  • C. Parallel adder
  • D. Carry-look-ahead adder
  • E. None of the above

  • Correct Answer
  • Carry-look-ahead adder 


  • Digital Computer Electronics problems


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    • 1. What is the 1's complement of 0000 1111 0010 1101 number?

    • Options
    • A. 1111 0000 0010 1101
    • B. 1111 0000 1101 0010
    • C. 1111 1100 1010 1100
    • D. 1001 0010 1010 1100
    • E. None of the above
    • Discuss
    • 2. Conversion of an octal number 1368 to hexadecimal number is

    • Options
    • A. 7E16
    • B. 5E16
    • C. 5A16
    • D. 5D16
    • E. None of the above
    • Discuss
    • 3. The m-bit parallel adder consists of:

    • Options
    • A. (m+1) full adders
    • B. m/2 full adders
    • C. m-1 full adders
    • D. m full adders
    • E. None of the above
    • Discuss
    • 4. The maximum count which a 6-bit binary word can represent is

    • Options
    • A. 36
    • B. 64
    • C. 63
    • D. 65
    • E. None of the above
    • Discuss
    • 5. Addition of 11012 and 10102 is

    • Options
    • A. 101012
    • B. 110002
    • C. 110112
    • D. 101112
    • E. None of the above
    • Discuss
    • 6. Conversion of an octal number 74328 to a binary number is

    • Options
    • A. 11110001101112
    • B. 1111000110102
    • C. 1100110101112
    • D. 1111111110002
    • E. None of the above
    • Discuss
    • 7. A NAND gate is equivalent to an AND gate followed by an inverter. All inputs must be _____ to get a low output

    • Options
    • A. low
    • B. high
    • C. some low and some high
    • D. 0's
    • E. None of the above
    • Discuss
    • 8. An OR gate has 6 inputs. How many input words are in its truth table?

    • Options
    • A. 64
    • B. 32
    • C. 16
    • D. 128
    • E. None of the above
    • Discuss
    • 9. What logic function is produced by adding an inverter to the output of an AND gate?

    • Options
    • A. NAND
    • B. NOR
    • C. XOR
    • D. OR
    • E. None of the above
    • Discuss
    • 10. Conversion of an octal number 1438 to hexadecimal number is

    • Options
    • A. 6316
    • B. 6016
    • C. 5016
    • D. 5716
    • E. None of the above
    • Discuss


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