Digital Electronics - Code Converters and Multiplexers

Exercise :: Code Converters and Multiplexers - General Questions

31. 

A binary code that progresses such that only one bit changes between two successive codes is:

A. nine's-complement code
B. 8421 code
C. excess-3 code
D. Gray code

Answer: Option D

Explanation:

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32. 

Which of the following is not a weighted value positional numbering system:

A. hexadecimal
B. binary-coded decimal
C. binary
D. octal

Answer: Option B

Explanation:

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33. 

How many inputs are required for a 1-of-16 decoder?

A. 2
B. 4
C. 8
D. 16

Answer: Option B

Explanation:

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34. 

A truth table with output columns numbered 0–15 may be for which type of decoder IC?

A. hexadecimal 1-of-16
B. dual octal outputs
C. binary-to-hexadecimal
D. hexadecimal-to-binary

Answer: Option A

Explanation:

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35. 

In a BCD-to-seven-segment converter, why must a code converter be utilized?

A. to convert the 4-bit BCD into 7-bit code
B. to convert the 4-bit BCD into 10-bit code
C. to convert the 4-bit BCD into Gray code
D. No conversion is necessary.

Answer: Option A

Explanation:

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