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  • 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. How are the statements between BEGIN and END not evaluated in VHDL?

    • Options
    • A. Constantly
    • B. Simultaneously
    • C. Concurrently
    • D. Sequentially
      • Discuss
    • 2. Does the 74123 one shot have an internal timing resistor?

    • Options
    • A. yes
    • B. no
      • Discuss
    • 3. The Boolean expression for a three-input AND gate is X = ABC.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. The schematic editor allows you to connect with predefined logic symbols.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. The technique used by one-shots to respond to an edge rather than a level is called ________.

    • Options
    • A. level management
    • B. edge triggering
    • C. trigger input
    • D. edge trapping
      • Discuss
    • 6. The address-decoding scheme for a 16K-byte EPROM memory system requires a 1-to-8-address decoder when 4K × 8 memory is used.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. The original Pentium was the first CPU to feature separate data and instruction caches.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. What is a disadvantage of CMOS in place of TTL?

    • Options
    • A. It switches slower.
    • B. It uses less power.
    • C. It is smaller.
    • D. cost
      • Discuss
    • 9. Which of the following statements accurately represents the two BEST methods of logic circuit simplification?

    • Options
    • A. Boolean algebra and Karnaugh mapping
    • B. Karnaugh mapping and circuit waveform analysis
    • C. Actual circuit trial and error evaluation and waveform analysis
    • D. Boolean algebra and actual circuit trial and error evaluation
      • Discuss
    • 10. What is the bit storage capacity of a ROM with a 1024 × 8 organization?

    • Options
    • A. 1024
    • B. 2048
    • C. 4096
    • D. 8192
      • Discuss

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