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Total Questions : 457 | Page 3 of 46 pages
Question 21. The NAND gate is AND gate followed by ___________.
  1.    NOT gate
  2.    OR gate
  3.    AND gate
  4.    None of the above
 Discuss Question
Answer: Option A. -> NOT gate
Question 22. Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is
  1.    TTLAS
  2.    CMOS
  3.    ECL
  4.    TTLLS
 Discuss Question
Answer: Option C. -> ECL
Question 23. In Boolean algebra, the bar sign (-) indicates ___________.
  1.    OR operation
  2.    AND operation
  3.    NOT operation
  4.    None of the above
 Discuss Question
Answer: Option C. -> NOT operation
Question 24. A hexadecimal odometer displays F 52 F. The next reading will be
  1.    F52E
  2.    G52F
  3.    F53F
  4.    F53O
 Discuss Question
Answer: Option D. -> F53O
Question 25. The binary code of (21.125)10 is
  1.    10101.001
  2.    10100.001
  3.    10101.010
  4.    10100.111
 Discuss Question
Answer: Option A. -> 10101.001
Question 26. A NAND gate is called a universal logic element because
  1.    It is used by everybody
  2.    Any logic function can be realized by NAND gates alone
  3.    All the minization techniques are applicable for optimum NAND gate realization
  4.    Many digital computers use NAND gates.
 Discuss Question
Answer: Option B. -> Any logic function can be realized by NAND gates alone
Question 27. NAND. gates are preferred over others because these
  1.    have lower fabrication area
  2.    can be used to make any gate
  3.    consume least electronic power
  4.    provide maximum density in a chip.
 Discuss Question
Answer: Option B. -> can be used to make any gate
Question 28. Which is the correct order of sequence for representing the input values in K-map?
  1.    (00, 01, 10, 11)
  2.    (00, 10, 01, 11)
  3.    (00, 01, 11, 10)
  4.    (00, 10, 11, 01)
 Discuss Question
Answer: Option C. -> (00, 01, 11, 10)
Question 29. The inputs of a NAND gate are connected together. The resulting circuit is ___________.
  1.    OR gate
  2.    AND gate
  3.    NOT gate
  4.    None of the above
 Discuss Question
Answer: Option C. -> NOT gate
Question 30. Digital computers are more widely used as compared to analog computers, because they are
  1.    Less expensive
  2.    Always more accurate and faster
  3.    Useful over wider ranges of problem types
  4.    Easier to maintain
 Discuss Question
Answer: Option C. -> Useful over wider ranges of problem types

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