logo

CuriousTab

CuriousTab

Discussion

Home ‣ Digital Electronics ‣ Digital Concepts See What Others Are Saying!
  • Question

  • What is a digital-to-analog converter?


  • Options
  • A. It takes the digital information from an audio CD and converts it to a usable form.
  • B. It allows the use of cheaper analog techniques, which are always simpler.
  • C. It stores digital data on a hard drive.
  • D. It converts direct current to alternating current.

  • Correct Answer
  • It takes the digital information from an audio CD and converts it to a usable form. 

    Explanation
    A DAC converts an abstract finite-precision number (usually a fixed-point binary number) into a concrete physical quantity (e.g., a voltage or a pressure).

    • More questions

    • 1. The content of a simple programmable logic device (PLD) consists of:

    • Options
    • A. fuse-link arrays
    • B. thousands of basic logic gates
    • C. advanced sequential logic functions
    • D. thousands of basic logic gates and advanced sequential logic functions
      • Discuss
    • 2. A counter has a specified sequence of states, but a shift register does not.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. ROMs are used to store data on a permanent basis.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. A microprocessor with the necessary support circuits will include at least two memory ICs: ROM or EPROM, and a RAM.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. What is the acquisition time of the AD1154 sample-and-hold IC?

    • Options
    • A. 1.5 µs
    • B. 2.5 µs
    • C. 3.5 µs
    • D. 4.5 µs
      • Discuss
    • 6. Which of the figures shown below represents the exclusive-NOR gate?


    • Options
    • A. a
    • B. b
    • C. c
    • D. d
      • Discuss
    • 7. The device that places its input data onto one of several outputs is a ________.

    • Options
    • A. demultiplexer
    • B. multiplexer
    • C. comparator
    • D. counter
      • Discuss
    • 8. Digital computers use an easier method to subtract binary numbers, called one's complement.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. With interrupt-driven I/O, if two or more devices request service at the same time, ________.

    • Options
    • A. the device closest to the CPU gets priority
    • B. the device that is fastest gets priority
    • C. the device assigned the highest priority is serviced first
    • D. the system is likely to crash
      • Discuss
    • 10. Asynchronous counters are often called ________ counters.

    • Options
    • A. toggle
    • B. ripple
    • C. binary
    • D. flip-flop
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.