Digital Computer Electronics MCQ

Test your knowledge with important Digital Computer Electronics MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Digital Computer Electronics MCQs at Bissoy

• Conversion of an octal number 134₈ to a binary number is
  ক

  001011011₂

  খ

  001101100₂

  গ

  001011100₂

  ঘ

  110011₂

  ঙ

  None of the above
• Addition of 110101₂ and 101111₂ is
  ক

  1100100₂

  খ

  1101000₂

  গ

  1110111₂

  ঘ

  110011₂

  ঙ

  None of the above
• Subtraction of 100101100₂ from 1110101010₂ is
  ক

  1001011110₂

  খ

  0110100001₂

  গ

  1111000001₂

  ঘ

  1111011111₂

  ঙ

  None of the above
• Which of the following logic expression is wrong?
  ক

  1 + 0=1

  খ

  1 + 1=0

  গ

  1+0+1 = 1

  ঘ

  1 + 1 + 1 = 1

  ঙ

  None of the above
• Consider as RS flip-flops with both inputs set to 0. If a momentary '1' is applied at the input S, then the output
  ক

  Q will flip from 0 to 1

  খ

  Q will flip from 0 to 1 and then back to 0

  গ

  <span style="text-decoration:overline">Q</span> will flip from 0 to 1

  ঘ

  <span style="text-decoration:overline">Q</span> will flip from 0 to 1 and then back to 0

  ঙ

  None of the above
• How many bytes are there in 1011 1001 0110 1110 numbers?
  ক

  1

  খ

  2

  গ

  4

  ঘ

  8

  ঙ

  None of the above
• A NOR gate recognizes only the input word whose bits are _____
  ক

  0's and 1's

  খ

  1's

  গ

  0's

  ঘ

  0's or 1's

  ঙ

  None of the above
• BCD numbers are useful whenever _____ information is transferred into or out of a digital system.
  ক

  decimal

  খ

  binary

  গ

  ASCII

  ঘ

  hexadecimal

  ঙ

  None of the above
• Conversion of hexadecimal number 93FA₁₆ to it's binary number equivalent is
  ক

  1001001111111010₂

  খ

  10010011111110111₂

  গ

  110011111110011₂

  ঘ

  111110000111₂

  ঙ

  None of the above
• The _____ gate has two or more input signals. All inputs must be high to get a high output
  ক

  OR

  খ

  NAND

  গ

  AND

  ঘ

  NOR

  ঙ

  None of the above
• The 2's compliment of binary number 0.01011 is:
  ক

  1.10101

  খ

  0.10101

  গ

  1.101

  ঘ

  0.101

  ঙ

  None of the above
• Conversion of decimal number 99₁₀ to it's octal number equivalent is
  ক

  121₈

  খ

  143₈

  গ

  124₈

  ঘ

  119₈

  ঙ

  None of the above
• Conversion of decimal number 93₁₀ to hexadecimal number is
  ক

  2D₁₆

  খ

  5D₁₆

  গ

  62₁₆

  ঘ

  31₁₆

  ঙ

  None of the above
• Computers use thousands of flip-flops. To coordinate the overall action, a common signal called the _____ is sent to each flip-flop.
  ক

  latch

  খ

  clock

  গ

  master

  ঘ

  slave

  ঙ

  None of the above
• Binary-Coded-decimal (BCD) numbers express each digit as a _____
  ক

  byte

  খ

  nibble

  গ

  bit

  ঘ

  All of the above

  ঙ

  None of the above
• Which of the following boolean algebra statements represent commutative law
  ক

  (A+B)+CA+(B+C)

  খ

  A.(B+C)(A.B)+(A.C)

  গ

  A+BB+A

  ঘ

  A+AA

  ঙ

  None of the above
• Multiplication of 47₈ by 52₈ is
  ক

  (3144)₈

  খ

  (4147)₈

  গ

  (3146)₈

  ঘ

  (3184)₈

  ঙ

  None of the above
• The number of input words in a truth table always equals _____ where n is the number of inputs bits.
  ক

  10ⁿ

  খ

  2ⁿ

  গ

  4ⁿ

  ঘ

  8ⁿ

  ঙ

  None of the above
• Which of the following is a universal gate?
  ক

  AND

  খ

  OR

  গ

  EX-OR

  ঘ

  NAND

  ঙ

  None of the above
• An XOR gate recognizes only words with an _____ number of 1's.
  ক

  even

  খ

  odd

  গ

  different

  ঘ

  All of the above

  ঙ

  None of the above
• The radix of the binary number is:
  ক

  3

  খ

  1

  গ

  2

  ঘ

  10

  ঙ

  None of the above
• A full-adder adds _____ bits, and producing a SUM and a _____
  ক

  8, SUBTRACTION

  খ

  3, CARRY

  গ

  16, DIVIDE

  ঘ

  All of the above

  ঙ

  None of the above
• The reduced form of the Boolean expression (A+B)(A+C) is:
  ক

  AB+AC

  খ

  A+B+C

  গ

  AC+B

  ঘ

  A+BC

  ঙ

  None of the above
• In boolean algebra, the overbar stands for the NOT operation, the plus sign stands for the _____ operation.
  ক

  AND

  খ

  OR

  গ

  NAND

  ঘ

  NOR

  ঙ

  None of the above
• The clock signals are used in sequential logic circuits
  ক

  to tell the time of the day

  খ

  to tell how much time has elapsed since the system was turned on

  গ

  to carry serial data signals

  ঘ

  to synchronize events in various parts of a system

  ঙ

  None of the above
• The highest decimal number that can be represented with 10 binary digits is
  ক

  1023

  খ

  1024

  গ

  512

  ঘ

  All of the above

  ঙ

  None of the above
• The output of the following gate is 1 only if at least one of its inputs is 0.
  ক

  AND gate

  খ

  OR gate

  গ

  NAND gate

  ঘ

  NOR gate

  ঙ

  None of the above
• The _____ is a sequence of instructions that tells the computer how to process the data.
  ক

  data

  খ

  program

  গ

  controls

  ঘ

  instruction

  ঙ

  None of the above
• Convert the 1000 0000 0000 1111 signed binary number to decimal number.
  ক

  15

  খ

  -15

  গ

  -30

  ঘ

  30

  ঙ

  None of the above
• An AND gate has 7 inputs, what is the only input word that produces a 1 output?
  ক

  0

  খ

  1111

  গ

  1110000

  ঘ

  1111111

  ঙ

  None of the above