| 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 |
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Answer: (b).Logical right shift
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| 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 |
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Answer: (b).NAND and NOR gates
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| 3. | BCD stands for |
| a. | Boolean code definition |
| b. | Binary coded division |
| c. | Binary coded decimal |
| d. | None of the above |
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Answer: (c).Binary coded decimal
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| 4. | The basic circuit ECL supports the |
| a. | NAND logic |
| b. | NOR logic |
| c. | EX-OR logic |
| d. | OR-NOR logic |
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Answer: (d).OR-NOR logic
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| 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 |
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Answer: (b).XOR gates
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| 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 |
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Answer: (c).2 input XOR gate
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| 7. | CARRY in half adder can be obtained using |
| a. | EX-OR gate |
| b. | AND gate |
| c. | OR-gate |
| d. | EX-NOR gate |
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Answer: (b).AND gate
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| 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 |
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Answer: (b).AND gate
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| 9. | The operation which commutative but not associative is |
| a. | AND |
| b. | OR |
| c. | XOR |
| d. | NAND |
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Answer: (d).NAND
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| 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 |
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Answer: (a).OR
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