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Home Digital Electronics Boolean Algebra and Logic Simplification See What Others Are Saying!
  • Question
  • The commutative law of addition and multiplication indicates that:


  • Options
  • A. we can group variables in an AND or in an OR any way we want
  • B. an expression can be expanded by multiplying term by term just the same as in ordinary algebra
  • C. the way we OR or AND two variables is unimportant because the result is the same
  • D. the factoring of Boolean expressions requires the multiplication of product terms that contain like variables

  • Correct Answer
  • the way we OR or AND two variables is unimportant because the result is the same 


  • More questions

    • 1. If both inputs of a 2-input NOR gate are connected, the gate will function as an ________.

    • Options
    • A. OR gate
    • B. AND gate
    • C. inverter
    • D. any of the above
    • Discuss
    • 2. Temperature variation is normally an analog quantity.

    • Options
    • A. True
    • B. False
    • Discuss
    • 3. What is the resolution, in percent, of a 12-bit DAC?

    • Options
    • A. 8.33
    • B. 0.049
    • C. 0.000488
    • D. 0.083
    • Discuss
    • 4. This program code will be executed once:

      STAT: MOV A, #01H
        JNZ STAT

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. Which of the following commands will copy the contents of location 4H to the accumulator?

    • Options
    • A. MOV A, 04H
    • B. MOV A, L4
    • C. MOV L4, A
    • D. MOV 04H, A
    • Discuss
    • 6. The following program will cause the 8051 to be stuck in a loop:

      LOOP: MOV A, #00H
        JNZ LOOP

    • Options
    • A. True
    • B. False
    • Discuss
    • 7. MOV A, @ R1 will:

    • Options
    • A. copy R1 to the accumulator
    • B. copy the accumulator to R1
    • C. copy the contents of memory whose address is in R1 to the accumulator
    • D. copy the accumulator to the contents of memory whose address is in R1
    • Discuss
    • 8. The last 96 locations in the internal data memory are reserved for general-purpose data storage and stack.

    • Options
    • A. True
    • B. False
    • Discuss
    • 9. The contents of the accumulator after this operation
      MOV A,#2BH
      ORL A,00H
      will be:

    • Options
    • A. 1B H
    • B. 2B H
    • C. 3B H
    • D. 4B H
    • Discuss
    • 10. The special function registers are maintained in the next 128 locations after the general-purpose data storage and stack.

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


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