Code Converters and Multiplexers problems
- 1. A microcontroller differs from a microprocessor in that it has several ________ ports and ________ built into its architecture, making it better suited for ________ applications.
Options- A. communication, PROMs, control
- B. parallel, logic gates, processing
- C. input/output, memory, control
- D. data, memory, decoding Discuss
Correct Answer: input/output, memory, control
- 2. The primary use for Gray code is:
Options- A. coded representation of a shaft's mechanical position
- B. turning on/off software switches
- C. to represent the correct ASCII code to indicate the angular position of a shaft on rotating machinery
- D. to convert the angular position of a shaft on rotating machinery into hexadecimal code Discuss
Correct Answer: coded representation of a shaft's mechanical position
- 3. How many inputs are required for a 1-of-10 BCD decoder?
Options- A. 4
- B. 8
- C. 10
- D. 1 Discuss
Correct Answer: 4
- 4. What is the function of an enable input on a multiplexer chip?
Options- A. to apply Vcc
- B. to connect ground
- C. to active the entire chip
- D. to active one half of the chip Discuss
Correct Answer: to active the entire chip
- 5. Why is a demultiplexer called a data distributor?
Options- A. The input will be distributed to one of the outputs.
- B. One of the inputs will be selected for the output.
- C. The output will be distributed to one of the inputs. Discuss
Correct Answer: The input will be distributed to one of the outputs.
- 6. A binary code that progresses such that only one bit changes between two successive codes is:
Options- A. nine's-complement code
- B. 8421 code
- C. excess-3 code
- D. Gray code Discuss
Correct Answer: Gray code
- 7. A truth table with output columns numbered 0?15 may be for which type of decoder IC?
Options- A. hexadecimal 1-of-16
- B. dual octal outputs
- C. binary-to-hexadecimal
- D. hexadecimal-to-binary Discuss
Correct Answer: hexadecimal 1-of-16
- 8. In a Gray code, each number is 3 greater than the binary representation of that number.
Options- A. True
- B. False Discuss
Correct Answer: False
- 9. How many inputs will a decimal-to-BCD encoder have?
Options- A. 4
- B. 8
- C. 10
- D. 16 Discuss
Correct Answer: 10
- 10. How many inputs are required for a 1-of-16 decoder?
Options- A. 2
- B. 4
- C. 8
- D. 16 Discuss
Correct Answer: 4
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