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Home ‣ Digital Electronics ‣ Describing Logic Circuits Comments
  • Question

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


  • Options
  • A. Constantly
  • B. Simultaneously
  • C. Concurrently
  • D. Sequentially

  • Correct Answer
  • Sequentially 

    • Describing Logic Circuits problems

    Search Results

    • 1. The Boolean equation for a NOR function is:

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 2. What is the basic difference between AHDL and VHDL?

    • Options
    • A. ADHL is used in all PLD's.
    • B. VHDL is used in all PLD's.
    • C. ADHL is proprietary.
    • D. VHDL is proprietary.
      • Discuss
    • 3. A NOR gate with one HIGH input and one LOW input:

    • Options
    • A. will output a HIGH
    • B. functions as an AND
    • C. will not function
    • D. will output a LOW
      • Discuss
    • 4. Which of the figures given below represents an OR gate?


    • Options
    • A. a
    • B. b
    • C. c
    • D. d
      • Discuss
    • 5. Which step in this reduction process is using DeMorgan's theorem?


    • Options
    • A. STEP 1
    • B. STEP 2
    • C. STEP 3
    • D. STEP 4
      • Discuss
    • 6. A NAND gate has:

    • Options
    • A. active-LOW inputs and an active-HIGH output.
    • B. active-LOW inputs and an active-LOW output.
    • C. active-HIGH inputs and an active-HIGH output.
    • D. active-HIGH inputs and an active-LOW output.
      • Discuss
    • 7. The format used to present the logic output for the various combinations of logic inputs to a gate is called a(n):

    • Options
    • A. truth table.
    • B. input logic function.
    • C. Boolean constant.
    • D. Boolean variable.
      • Discuss
    • 8. Which of the figures in figure (a to d) is equivalent to figure (e)?


    • Options
    • A. a
    • B. b
    • C. c
    • D. d
      • Discuss
    • 9. Which of the following equations would accurately describe a 4-input OR gate when A = 1, B = 1, C = 0, and D = 0?

    • Options
    • A. 1 + 1 + 0 + 0 = 1
    • B. 1 + 1 + 0 + 0 = 01
    • C. 1 + 1 + 0 + 0 = 0
    • D. 1 + 1 + 0 + 0 = 00
      • Discuss
    • 10. The special software application that translates from HDL into a grid of 1's and 0's, which can be loaded into a PLD, is called a:

    • Options
    • A. formatter.
    • B. compiler.
    • C. programmable wiring.
    • D. CPU.
      • Discuss

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