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Digital Computer Electronics problems


  • 1. An OR gate can be imagined as

  • Options
  • A. switches connected in series
  • B. switches connected in parallel
  • C. MOS transistors connected in series
  • D. All of the above
  • E. None of the above
  • Discuss
  • 2. A positive AND gate is also a negative

  • Options
  • A. NAND gate
  • B. NOR gate
  • C. AND gate
  • D. OR gate
  • E. None of the above
  • Discuss
  • 3. How many inputs signals can a gate have?

  • Options
  • A. one
  • B. more than one
  • C. two only
  • D. both (a) and (b)
  • E. None of the above
  • Discuss
  • 4. Conversion of decimal number 6710 to it's octal number equivalent is

  • Options
  • A. 1008
  • B. 1038
  • C. 1098
  • D. 998
  • E. None of the above
  • Discuss
  • 5. The time required for a pulse to decrease from 90 to 10 percent of its maximum value is known as

  • Options
  • A. rise time
  • B. decay time
  • C. binary level transition period
  • D. propagation delay
  • E. None of the above
  • Discuss
  • 6. Which of the following flip-flops is free from race around problem?

  • Options
  • A. T flip-flop
  • B. SR flip-flop
  • C. master slave JK flip-flop
  • D. All of the above
  • E. None of the above
  • Discuss
  • 7. What logic function is obtained by adding an inverter to the inputs of an AND gate?

  • Options
  • A. OR
  • B. NAND
  • C. XOR
  • D. NOR
  • E. None of the above
  • Discuss
  • 8. A NOR gate has two or more input signals. All input must be _____ to get a high output

  • Options
  • A. low
  • B. high
  • C. some low some high
  • D. 1's
  • E. None of the above
  • Discuss
  • 9. What is the 2's complement of 0011 0101 1001 1100 number?

  • Options
  • A. 1100 1010 1100 1011
  • B. 1100 1010 0110 0011
  • C. 1100 1010 0110 0100
  • D. 1100 1010 1111 1111
  • E. None of the above
  • Discuss
  • 10. Conversion of an octal number 1128 to hexadecimal number is

  • Options
  • A. 4A16
  • B. 5A16
  • C. 1516
  • D. 2016
  • E. None of the above
  • Discuss

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