Microprocessors And Microcontrollers MCQ

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• It is possible to copy a file in the same directory.
  ক

  True

  খ

  False
• In Fortran 77 a variable name can contain special characters.
  ক

  True

  খ

  False
• Which of the following is not a general purpose peripheral?
  ক

  Input/Output port

  খ

  Programmable interrupt controller

  গ

  Programmable CRT controller

  ঘ

  Programmable interval timer
• MS Access is a DBMS software.
  ক

  True

  খ

  False
• Of the following circuits, the one which involves storage is
  ক

  RS Latch

  খ

  Mux

  গ

  Nand

  ঘ

  Decoder
• An Input/Output processor controls the flow of information between
  ক

  Cache memory and Input/Output devices

  খ

  Main memory and Input/Output devices

  গ

  Two Input/Output devices

  ঘ

  Cache and main memory
• In 8085, the pins for SID and SOD are
  ক

  4 and 5 respectively

  খ

  5 and 4 respectively

  গ

  3 and 4 respectively

  ঘ

  4 and 3 respectively
• When .9432 E – 4 is subtracted from .5452 E – 3 in normalized floating point mode
  ক

  None of the numbers is changed

  খ

  .9432 E – 4 is changed to .09432 E – 3 and .5452 E – 3 is not changed

  গ

  .5452 E – 3 is changed to 5.452 E – 4 but .9432 E – 4 is not changed

  ঘ

  Both Ihe numbers are changed and their exponents are, made equal to -5
• ‘Burst refresh’ in DRAM is also called
  ক

  Concentrated refresh

  খ

  Distributed refresh

  গ

  Hidden refresh

  ঘ

  None of the above
• IC 7485 cannot be cascadeD.
  ক

  True

  খ

  False
• Which of the following is not treated as hexadecimal constant by assembler in 8085?
  ক

  45 H

  খ

  6 AFH

  গ

  234

  ঘ

  64 H
• The minimum number of transistors required to implement a two input AND gate is
  ক

  2

  খ

  4

  গ

  6

  ঘ

  8
• Assertion (A): Negative values of incremental operator in DO loop are allowed in Fortran 77 but not in earlier versions of Fortran.<br>Reason (R): Fortran 77 has better array facilities than earlier versions of Fortran.
  ক

  Both A and R are correct and R is correct explanation of A

  খ

  Both A and R are correct but R is not correct explanation of A

  গ

  A is correct R is wrong

  ঘ

  A is wrong R is correct
• The number of interrupt lines in 8085 is
  ক

  2

  খ

  3

  গ

  4

  ঘ

  5
• If the number of address bits in a memory is reduced by 2 and the addressability is doubled, the size of the memory (i.e., the number of bits stored in the memory)
  ক

  Doubles

  খ

  Remains unchanged

  গ

  Halves

  ঘ

  Increases by 2^(address bits)/addressability
• Which of the following is type declaration statement in C?
  ক

  int bar

  খ

  s = s + 1

  গ

  king = horse + 1

  ঘ

  prin = prin * prin
• Each instruction in assembly language program has the following fields:<br>1. Lable field<br>2. Mnemonic field<br>3. Operand field<br>4. Comment field<br>The correct sequence of these fields is?
  ক

  1, 2, 3, 4

  খ

  1, 2, 4, 3

  গ

  2, 1, 3, 4

  ঘ

  2, 1, 4, 3
• A structure that stores a number of bits taken “together as a unit” is a
  ক

  Gate

  খ

  Mux

  গ

  Decoder

  ঘ

  Register
• The character set of Fortran 77 includes lower case alphabets a to z.
  ক

  True

  খ

  False
• Which memory has read operation, byte erase, byte write and chip erase?
  ক

  RAM

  খ

  UVEPROM

  গ

  EEPROM

  ঘ

  Both B and C
• The timing difference between a slow memory and fast processor can be resolved if
  ক

  Processor is capable of waiting

  খ

  External buffer is used

  গ

  Either A or B

  ঘ

  Neither A nor B
• If m is a power of 2, the number of select lines required for an m-input mux is:
  ক

  m

  খ

  2^m

  গ

  log2 (m)

  ঘ

  2*m
• Which of the following conditions is not allowed in an RS latch?
  ক

  R is asserted, S is asserted

  খ

  R is asserted, S is negated

  গ

  R is negated, S is asserted

  ঘ

  R is negated, S is negated
• The forms of IF statements in FORTRAN 77 are called
  ক

  Logical IF and Block IF

  খ

  Logical IF, block IF and arithmetic IF

  গ

  Logic IF, block IF, arithmetic IF and negate IF

  ঘ

  Logical IF and arithmetic IF
• In C the keywords are also called
  ক

  Special words

  খ

  Reserved words

  গ

  Class words

  ঘ

  Character words
• The operating modes of 8255 A are called
  ক

  Mode 0 and mode 1

  খ

  Mode 0, mode 1 and mode 2

  গ

  Mode 0 and mode 2

  ঘ

  Mode 0, mode 2 and mode 3
• If the sign bit of mantissa is 0 and the exponent is increased from a positive to a more negative number the result is
  ক

  A larger floating point number

  খ

  A smaller floating point number

  গ

  Either A or B depending on the actual number

  ঘ

  A negative floating point number
• Using DeMorgan’s Theorem we can convert any AND-OR structure into
  ক

  NAND-NAND

  খ

  OR-NAND

  গ

  NAND-NOR

  ঘ

  NOR-NAND
• A real number consists of
  ক

  Integer part

  খ

  Integer part and fraction part

  গ

  Integer part, fraction part along with positive or negative sign

  ঘ

  None of the above
• Internet is a worldwide network of computers where most of the information is freely available.
  ক

  True

  খ

  False