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  • Question

  • The number of digits in octal system is


  • Options
  • A. 8
  • B. 7
  • C. 9
  • D. 10

  • Correct Answer
  • 8 

    Explanation
    The octal system has 8 digits 0 to 7.
    Tags: Bank Exams

    Digital Electronics problems

    Search Results

    • 1. Both OR and AND gates can have only two inputs.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. In register index addressing mode the effective address is given by

    • Options
    • A. index register value
    • B. sum of the index register value and the operand
    • C. operand
    • D. difference of the index register value and the operand
      • Discuss
    • 3. The circuit of the given figure realizes the function

    • Options
    • A. Y = (A + B) C + DE
    • B. Y = A + B + C + D + E
    • C. AB + C +DE
    • D. AB + C(D + E)
      • Discuss
    • 4. A three state switch has three outputs. These are

    • Options
    • A. low, low and high
    • B. low, high, high
    • C. low. floating, low
    • D. low, high, floating
      • Discuss
    • 5. AB + AB =

    • Options
    • A. B
    • B. A
    • C. 1
    • D. 0
      • Discuss
    • 6. In 2's complement representation the number 11100101 represents the decimal number

    • Options
    • A. +37
    • B. -31
    • C. +27
    • D. -27
      • Discuss
    • 7. 1's complement of 11100110 is

    • Options
    • A. 00011001
    • B. 10000001
    • C. 00011010
    • D. 00000000
      • Discuss
    • 8. A full adder can be made out of

    • Options
    • A. two half adders
    • B. two half adders and a OR gate
    • C. two half adders and a NOT gate
    • D. three half adders
      • Discuss
    • 9. The counter in the given figure is

    • Options
    • A. Mod 3
    • B. Mod 6
    • C. Mod 8
    • D. Mod 7
      • Discuss
    • 10. The hexadecimal number (3E8)16 is equal to decimal number

    • Options
    • A. 1000
    • B. 982
    • C. 768
    • D. 323
      • Discuss

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