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MCQs

Total Questions : 457 | Page 28 of 46 pages
Question 271. What logic function is obtained by adding an inverter to the inputs of an AND gate?
  1.    OR
  2.    NAND
  3.    XOR
  4.    NOR
  5.    None of the above
 Discuss Question
Answer: Option D. -> NOR
Question 272. A bus is a group of _____ carrying digital signals.
  1.    wires
  2.    gates
  3.    transistors
  4.    registers
  5.    None of the above
 Discuss Question
Answer: Option A. -> wires
Question 273. De Morgan's first theorem says that a NOR gate is equivalent to a bubbled _____ gate.
  1.    AND
  2.    XAND
  3.    XOR
  4.    NOR
  5.    None of the above
 Discuss Question
Answer: Option A. -> AND
Question 274. The simplified form of the Boolean expression (X + Y + XY)(X + Z) is
  1.    X + Y + Z
  2.    XY + YZ
  3.    X + YZ
  4.    XZ + Y
  5.    None of the above
 Discuss Question
Answer: Option C. -> X + YZ
Question 275. Addition of 102 and 112 is
  1.    1002
  2.    1012
  3.    1112
  4.    1102
  5.    None of the above
 Discuss Question
Answer: Option B. -> 1012
Question 276. How many bits are required to encode all twenty six letters ten symbols, and ten numerals?
  1.    5
  2.    6
  3.    2
  4.    3
  5.    None of the above
 Discuss Question
Answer: Option B. -> 6
Question 277. A flip-flop can store:
  1.    1 bits of data
  2.    2 bits of data
  3.    3 bits of data
  4.    4 bits of data
  5.    None of the above
 Discuss Question
Answer: Option A. -> 1 bits of data
Question 278. The digits used in a binary number system are _____ and _____
  1.    9 and 0
  2.    0 and 1
  3.    1 and 2
  4.    3 and 4
  5.    None of the above
 Discuss Question
Answer: Option B. -> 0 and 1
Question 279. Cyclic codes are used in
  1.    data transfer
  2.    continuously varying signal representation
  3.    arithmetic and logical computation
  4.    All of the above
  5.    None of the above
 Discuss Question
Answer: Option B. -> continuously varying signal representation
Question 280. The 2-input XOR gate has a high output only when the input bits are _____
  1.    even
  2.    different
  3.    low
  4.    high
  5.    None of the above
 Discuss Question
Answer: Option B. -> different

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