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Home ‣ Digital Electronics ‣ Digital Arithmetic Operations and Circuits See What Others Are Saying!
  • Question

  • Solve this BCD problem: 0101 + 0110 = ________.


  • Options
  • A. 00010111BCD
  • B. 00001001BCD
  • C. 00010001BCD
  • D. 00010011BCD

  • Correct Answer
  • 00010001BCD 

    • More questions

    • 1. The basic types of programmable arrays are made up of ________.

    • Options
    • A. AND gates
    • B. OR gates
    • C. NAND and NOR gates
    • D. AND gates and OR gates
      • Discuss
    • 2. The term synchronous, as applied to counter operations, means that the counter is clocked such that each flip-flop in the counter is triggered at the same time.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. The format used to present the logic output for the various combinations of logic inputs to a gate is called a(n):

    • Options
    • A. Boolean constant
    • B. Boolean variable
    • C. truth table
    • D. input logic function
      • Discuss
    • 4. A logic probe is again applied to the pins of a 7421 IC with the following results. Is there a problem with the circuit and if so, what is the problem?


    • Options
    • A. Pin 6 should be ON.
    • B. Pin 8 should be ON.
    • C. Pin 8 should be pulsing.
    • D. no problem
      • Discuss
    • 5. Refer to the figure given below. The logic function generator being implemented with the multiplexer in this circuit produces a constant LOW on the output. The ABC inputs are checked and appear to be pulsing; also, the 0?7 and EN inputs are checked with the scope and all appear to be at 0 V. A check with the DMM confirms that power is on. What is the problem, and what should be done to correct it?


    • Options
    • A. The output is shorted to Vcc; replace the IC.
    • B. The scope's vertical input is in the AC mode and the common connection for the 0,2,3 and 5 inputs is bad. Set the scope's vertical input mode to DC, and repair the bad solder connection.
    • C. Power has not been applied to the circuit; apply power.
    • D. The output is shorted to ground; replace the IC.
      • Discuss
    • 6. In positive logic, ________.

    • Options
    • A. a HIGH = 1, a LOW = 0
    • B. a LOW = 1, a HIGH = 0
    • C. only HIGHs are present
    • D. only LOWs are present
      • Discuss
    • 7. Which of the following is not an analog device?

    • Options
    • A. Thermocouple
    • B. Current flow in a circuit
    • C. Light switch
    • D. Audio microphone
      • Discuss
    • 8. What is an analog-to-digital converter?

    • Options
    • A. It makes digital signals.
    • B. It takes analog signals and puts them in digital format.
    • C. It allows the use of digital signals in everyday life.
    • D. It stores information on a CD.
      • Discuss
    • 9. What is one relative disadvantage of serial transfer?

    • Options
    • A. It requires too many conductors.
    • B. Its interconnect system is complex.
    • C. It is slow.
    • D. It can only be used over very short distances.
      • Discuss
    • 10. What are the pin numbers of the outputs of the gates in a 7432 IC?

    • Options
    • A. 3, 6, 10, and 13
    • B. 1, 4, 10, and 13
    • C. 3, 6, 8, and 11
    • D. 1, 4, 8, and 11
      • Discuss

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