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Digital Components - Computer Architecture and Organization Objective Questions & Answers

1 Which of the following shift operations divide a signed binary number by 2 ?
A Logical left shift
B Logical right shift
C Arithmetic left shift
D Arithmetic right shift

Answer: Option [B]

Logical right shift operation can divide the number by 2 on shifting one bit

2 Normally digital computers are based on
A AND and OR gates
B NAND and NOR gates
C NOT gate
D None of the above

Answer: Option [B]

NAND and NOR gates are universal gates which are deployed into various computers



3 BCD stands for
A Boolean code definition
B Binary coded division
C Binary coded decimal
D None of the above

Answer: Option [C]

Binary coded decimal

4 The basic circuit ECL supports the
A NAND logic
B NOR logic
C EX-OR logic
D OR-NOR logic

Answer: Option [D]

OR-NOR logic is used to design ECL circuit

5 An adder-subtractor single unit can be designed using full adder and
A OR gates
B XOR gates
C NOR gates
D NAND gates

Answer: Option [B]

We use full adder and XOR gates to construct adder-subtractor

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