logo

CuriousTab

CuriousTab

Discussion

Home ‣ Digital Electronics ‣ Combinational Logic Circuits Comments
  • Question

  • Convert BCD 0001 0010 0110 to binary.


  • Options
  • A. 1111110
  • B. 1111101
  • C. 1111000
  • D. 1111111

  • Correct Answer
  • 1111110 

    • Combinational Logic Circuits problems

    Search Results

    • 1. What will a design engineer do after he/she is satisfied that the design will work?

    • Options
    • A. Put it in a flow chart
    • B. Program a chip and test it
    • C. Give the design to a technician to verify the design
    • D. Perform a vector test
      • Discuss
    • 2. What type of logic circuit is represented by the figure shown below?


    • Options
    • A. XOR
    • B. XNOR
    • C. XAND
    • D. XNAND
      • Discuss
    • 3. In VHDL, macrofunctions is/are:

    • Options
    • A. digital circuits.
    • B. analog circuits.
    • C. a set of bit vectors.
    • D. preprogrammed TTL devices.
      • Discuss
    • 4. Which of the following is an important feature of the sum-of-products form of expressions?

    • Options
    • A. All logic circuits are reduced to nothing more than simple AND and OR operations.
    • B. The delay times are greatly reduced over other forms.
    • C. No signal must pass through more than two gates, not including inverters.
    • D. The maximum number of gates that any signal must pass through is reduced by a factor of two.
      • Discuss
    • 5. Looping on a K-map always results in the elimination of:

    • Options
    • A. variables within the loop that appear only in their complemented form.
    • B. variables that remain unchanged within the loop.
    • C. variables within the loop that appear in both complemented and uncomplemented form.
    • D. variables within the loop that appear only in their uncomplemented form.
      • Discuss
    • 6. How many data select lines are required for selecting eight inputs?

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
      • Discuss
    • 7. For the device shown here, assume the D input is LOW, both S inputs are HIGH, and the input is HIGH. What is the status of the outputs?


    • Options
    • A. All are HIGH.
    • B. All are LOW.
    • C. All but are LOW.
    • D. All but are HIGH.
      • Discuss
    • 8. How many 4-bit parallel adders would be required to add two binary numbers each representing decimal numbers up through 30010?

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
      • Discuss
    • 9. Solve the network in the figure given below for X.


    • Options
    • A. A + BC + D
    • B. ((A + B)C) + D
    • C. D(A + B + C)
    • D. (AC + BC)D
      • Discuss
    • 10. As a technician you are confronted with a TTL circuit board containing dozens of IC chips. You have taken several readings at numerous IC chips, but the readings are inconclusive because of their erratic nature. Of the possible faults listed, select the one that most probably is causing the problem.

    • Options
    • A. A defective IC chip that is drawing excessive current from the power supply
    • B. A solar bridge between the inputs on the first IC chip on the board
    • C. An open input on the first IC chip on the board
    • D. A defective output IC chip that has an internal open to Vcc
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.