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Digital Components - Computer Science and Engineering Objective Questions and Answers

Questions
6 Which of the following is not a universal building block ?
A 2 input NAND gate
B L3 input NAND gate
C 2 input XOR gate
D None of the above

Answer: Option [C]
7 CARRY, in half adder, can be obtained using
A EX-OR gate
B AND gate
C OR-gate
D EX-NOR gate

Answer: Option [B]

Half adder is constructed using AND operation.

8 A NAND gate has inputs A and B. It's output is connected to the both of the inputs of another NAND gate. An equivalent gate for these two NAND gates is
A OR gate
B AND gate
C NOR gate
D XOR gate

Answer: Option [B]
9 The operation which commutative but not associative is
A AND
B OR
C XOR
D NAND

Answer: Option [D]
10 In which of the following gates, the output is 1 if and only if at least one input is 1?
A OR
B NOR
C AND
D NAND

Answer: Option [A]

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