Elements Of Electronics Enggineering SEC "CA"

20 Questions | Total Attempts: 57

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Elements Of Electronics Enggineering SEC "CA"

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Questions and Answers
  • 1. 
    Convert the binary number 1001.0010 to decimal.
    • A. 

      90.125

    • B. 

      9.125

    • C. 

      125

    • D. 

      12.5

  • 2. 
    Number of bytes required to represent (1234 )10  in BCD is
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 3. 
    . Determine the values of A, B, C and D that can make the sum term A’+B+C’+D equal to zero.
    • A. 

      A = 1, B = 0, C = 0, D = 0

    • B. 

      A = 0, B = 1, C = 0, D = 0

    • C. 

      A = 1, B = 0, C = 1, D = 1

    • D. 

      A = 1, B = 0, C = 1, D = 0

  • 4. 
    The number of half adders required to general  full adder are
    • A. 

      4

    • B. 

      3

    • C. 

      2

    • D. 

      1

  • 5. 
    An AND gate with schematic "bubbles" on its inputs performs the same function as ________ gate.
    • A. 

      NOT

    • B. 

      OR

    • C. 

      NOR

    • D. 

      NAND

  • 6. 
    ----------------------- bus indicates data handling capacity of the Microprocessor
    • A. 

      System Bus

    • B. 

      Address Bus

    • C. 

      Data Bus

    • D. 

      Control Bus

  • 7. 
    Select the statement that best describes Read-Only Memory (ROM).
    • A. 

      Non-volatile, used to store information that changes during system operation

    • B. 

      Non-volatile, used to store information that does not change during system operation

    • C. 

      Volatile, used to store information that changes during system operation

    • D. 

      Volatile, used to store information that does not change during system operation

  • 8. 
    The maximum number of minterms that can be formed from 2 variables are
    • A. 

      6 minterms

    • B. 

      8 minterms

    • C. 

      4 minterms

    • D. 

      2 minterms

  • 9. 
    The Boolean expression X=A'+ B' + C'  is logically equivalent to what single gate?
    • A. 

      AND

    • B. 

      OR

    • C. 

      NAND

    • D. 

      NOR

  • 10. 
    A group of two 1s in a three variable k-map will simplify to _________ variable expression. (Specify the number)
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      None of these

  • 11. 
    The Boolean expression  A'+CA reduces to
    • A. 

      A+C

    • B. 

      A ̅+C

    • C. 

      ABC+ABC ̅

    • D. 

      A ̅

  • 12. 
    Which of the followings is not a memory?
    • A. 

      RAM

    • B. 

      SRAM

    • C. 

      EEPROM

    • D. 

      EPAM

  • 13. 
    Decimal 41 in Hexadecimal and BCD number system is respectively
    • A. 

      B2, 01000011

    • B. 

      29, 01000001

    • C. 

      2B, 01000010

    • D. 

      29, 00101001

  • 14. 
    A simple flip-flop
    • A. 

      Is a four state device

    • B. 

      Has nothing to do with memory

    • C. 

      Is 2 bit memory

    • D. 

      Is 1 bit memory

  • 15. 
    How many binary bits are necessary to represent 748 different numbers?
    • A. 

      9

    • B. 

      8

    • C. 

      7

    • D. 

      10

  • 16. 
    A half subtractor circuit requires
    • A. 

      Two inputs and two outputs

    • B. 

      Two inputs and three outputs

    • C. 

      Three inputs and one output

    • D. 

      Three inputs and two outputs

  • 17. 
    _____________ register is used in all ALU operations, i.e., to store one of operands and also result.
    • A. 

      Status

    • B. 

      Stack Pointer

    • C. 

      Program Counter

    • D. 

      Accumulator

  • 18. 
    . In the decimal numbering system, what is MSD?
    • A. 

      The middle digit of a stream of numbers

    • B. 

      The last digit on the right

    • C. 

      The digit to the right of the decimal point

    • D. 

      The digit with the most weight

  • 19. 
    . Suppose Y is a Boolean variable, which of the following expressions will be equal to 1? a. Y XOR Y           b. Y AND 0        c. Y NOR 1         d. Y XNOR Y
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 20. 
    NAND gate is combination of 
    • A. 

      AND & OR

    • B. 

      OR & NOT

    • C. 

      NOT & AND

    • D. 

      NOR and NOT

  • 21. 
    A full subtractor circuit requires
    • A. 

      Two inputs and two outputs

    • B. 

      Two inputs and three outputs

    • C. 

      Three inputs and one output

    • D. 

      Three inputs and two outputs

  • 22. 
    Terminals of a transistor
    • A. 

      E,B,C

    • B. 

      B, D, E

    • C. 

      V ,C ,E

    • D. 

      V,B,C

  • 23. 
    A half Adder circuit requires
    • A. 

      Two inputs and two outputs

    • B. 

      Three inputs and one output

    • C. 

      Two inputs and three outputs

    • D. 

      Three inputs and two outputs

  • 24. 
    In the decimal numbering system, what is LSB?
    • A. 

      Low sign bit

    • B. 

      Less Significant bit

    • C. 

      Least significant bit

    • D. 

      Lower significant bit

  • 25. 
    Expansion of BJT
    • A. 

      Bi-Polar Junction Transistor

    • B. 

      Bypass junction Transistor

    • C. 

      Bold junction Transistor

    • D. 

      Bass junction Transistor

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