| 1. | A digital multiplexer can be used for which of 1. Parallel to serial conversion 2. Many-to-one switch 3. To generate memory chip select 4. For code conversion Select the correct answer using the code given below: ? | |
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1,3 and 4
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2,3 and 4
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1 and 2 only
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2 and 3 only
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Report Question| 2. | A 2 bit binary multiplier can be implemented using ? | |
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2 inputs AND only
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2 input XOR and 4 input AND gates only
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2 inputs NOR and one XNOR gate
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XOR gates and shift registers
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| 3. | What are the minimum numbers of 2-to-1 multiplexers required to generate a 2-input AND gate and a 2-input Ex-OR gate ? | |
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1 and 2
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1 and 3
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1 and 1
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2 and 2
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| 4. | It is required to construct a 2n-to-1 multiplexer by using 2-to-1 multiplexer only. How many of 2-to-1 multiplexers are needed ? | |
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n
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2^2n
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2^(n-1)
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2^n-1
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| 5. | Consider the following statements: A 4: 16 decoder can be constructed (with enable input) by 1. using four 2:4 decoders (each with an enable input) only. 2. using five 2:4 decoders (each with an enable input) only. 3. using two 3:8 decoders (each with an enable input) only. 4. using two 3:8 decoders (each with an enable input) and an inverter. Which of the statements given above is/are correct ? | |
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2 and 3
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1 only
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2 and 4
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None of the above
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| 6. | A device which converts decimal number into BCD form is called ? | |
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encoder
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decoder
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code converter
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multiplexer
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| 7. | A device which converts BCD into octal is called ? | |
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encoder
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decoder
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code converter
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demultiplexer
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| 8. | A device which converts 2421 code into 8421code is called a ? | |
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code decoder
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code encoder
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coder
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code converter
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| 9. | Why decoder is used in the digital electronics ? | |
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To convert coded information into non coded form
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To convert non coded information into coded form
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It is used to separate address bus and data bus
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None of the above
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| 10. | Why encoder is used in the digital electronics ? | |
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To convert non coded information into coded form
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To convert coded information into non coded form
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It is used to separate address bus and data bus
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None of the above
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