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MCQs

Total Questions : 16 | Page 1 of 2 pages
Question 1.  The observation that a bubbled input OR gate is interchangeable with a bubbled output AND gate is referred to as:
  1.    a Karnaugh map
  2.    DeMorgan's second theorem
  3.    the commutative law of addition
  4.    the associative law of multiplication
 Discuss Question
Answer: Option B. -> DeMorgan's second theorem
Question 2.  The systematic reduction of logic circuits is accomplished by:
  1.    symbolic reduction
  2.    TTL logic
  3.    using Boolean algebra
  4.    using a truth table
 Discuss Question
Answer: Option C. -> using Boolean algebra
Question 3.  Which of the examples below expresses the commutative law of multiplication?
  1.    A + B = B + A
  2.    A • B = B + A
  3.    A • (B • C) = (A • B) • C
  4.    A • B = B • A
 Discuss Question
Answer: Option D. -> A • B = B • A
Question 4.  Which statement below best describes a Karnaugh map?
  1.    It is simply a rearranged truth table.
  2.    The Karnaugh map eliminates the need for using NAND and NOR gates.
  3.    Variable complements can be eliminated by using Karnaugh maps.
  4.    A Karnaugh map can be used to replace Boolean rules.
 Discuss Question
Answer: Option A. -> It is simply a rearranged truth table.
Question 5.  The Boolean expression mcq19_1001_1.gif is logically equivalent to what single gate?
  1.    NAND
  2.    NOR
  3.    AND
  4.    OR
 Discuss Question
Answer: Option A. -> NAND
Question 6.  Logically, the output of a NOR gate would have the same Boolean expression as a(n):
  1.    NAND gate immediately followed by an INVERTER
  2.    OR gate immediately followed by an INVERTER
  3.    AND gate immediately followed by an INVERTER
  4.    NOR gate immediately followed by an INVERTER
 Discuss Question
Answer: Option B. -> OR gate immediately followed by an INVERTER
Question 7.  Which of the examples below expresses the distributive law of Boolean algebra?
  1.    A • (B • C) = (A • B) + C
  2.    A + (B + C) = (A • B) + (A • C)
  3.    A • (B + C) = (A • B) + (A • C)
  4.    A • (B + C) = (A • B) + (A • C)
 Discuss Question
Answer: Option C. -> A • (B + C) = (A • B) + (A • C)
Question 8.  
One of DeMorgan's theorems states that mcq19_1007_1.gif. Simply stated, this means that logically there is no difference between:
  1.    a NAND gate and an AND gate with a bubbled output
  2.    a NOR gate and an AND gate with a bubbled output
  3.    a NOR gate and a NAND gate with a bubbled output
  4.    a NAND gate and an OR gate with a bubbled output
 Discuss Question
Answer: Option B. -> a NOR gate and an AND gate with a bubbled output
Question 9. . Which of the following expressions is in the sum-of-products (SOP) form?
  1.    Y = (A + B)(C + D)
  2.    Y = AB(CD)
  3.    Y=AB + AB
  4.    Y= (A + B ) .(A + B )
 Discuss Question
Answer: Option C. -> Y=AB + AB
Question 10. . Each "1" entry in a K-map square represents ______________.
  1.    a HIGH output on the truth table for all input combinations
  2.    a LOW output for all possible HIGH input conditions
  3.    a DON'T CARE condition for all possible input truth table combinations
  4.    a HIGH for each input truth table condition that produces a HIGH output
 Discuss Question
Answer: Option D. -> a HIGH for each input truth table condition that produces a HIGH output

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