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Home ‣ Digital Electronics ‣ Number Systems and Codes See What Others Are Saying!
  • Question

  • The decimal fraction 1/4 can be written in binary as________.


  • Options
  • A. 0.010
  • B. 0.100
  • C. 0.110
  • D. 0.011

  • Correct Answer
  • 0.010 

    • More questions

    • 1. A variable is a symbol used to represent a logical quantity that can have a value of 1 or 0.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. The bit sequence 10011100 is serially entered (right-most bit first) into an 8-bit parallel out shift register that is initially clear. What are the Q outputs after four clock pulses?

    • Options
    • A. 10011100
    • B. 11000000
    • C. 00001100
    • D. 11110000
      • Discuss
    • 3. To keep output data accurate, 4-bit series-in, parallel-out shift registers employ a ________.

    • Options
    • A. divide-by-4 clock pulse
    • B. sequence generator
    • C. strobe line
    • D. multiplexer
      • Discuss
    • 4. Address decoding for dynamic memory chip control may also be used for:

    • Options
    • A. controlling refresh circuits
    • B. read and write control
    • C. chip selection and address location
    • D. memory mapping
      • Discuss
    • 5. The binary subtraction 0 ? 1 = is
      difference = 1
      borrow = 0

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. An open-collector output requires ________.

    • Options
    • A. a pull-down resistor
    • B. a pull-up resistor
    • C. no output resistor
    • D. an output resistor
      • Discuss
    • 7. The periodic recharging of DRAM memory cells is called ________.

    • Options
    • A. multiplexing
    • B. bootstrapping
    • C. refreshing
    • D. flashing
      • Discuss
    • 8. A standard TTL circuit with a totem-pole output can sink, in the LOW state (IOL(max)), ________.

    • Options
    • A. 16 mA
    • B. 20 mA
    • C. 16 µA
    • D. 20 µA
      • Discuss
    • 9. A binary-weighted-input digital-to-analog converter has an input resistor of 100 kΩ. If the resistor is connected to a 5 V source, current through the resistor is ________.

    • Options
    • A. 50 mA
    • B. 50 µA
    • C. 5 mA
    • D. 500 µA
      • Discuss
    • 10. In order to select data input I3 of a 74151 eight-line multiplexer, the select inputs must be:

    • Options
    • A. True
    • B. False
      • Discuss

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