Electronics and Communication Engineering - Digital Electronics

16. 

The expression Y (A, B, C) = ∑m (1, 3, 5, 6) is to realized using a multiplexer. Then

A. use 8 : 1 multiplexer and ground input lines 1, 3, 5, 6
B. use 8 : 1 multiplexer and ground input lines 0, 2, 4, 7
C. use 8 : 1 multiplexer and ground input lines 0, 1, 2, 3
D. use 8 : 1 multiplexer and ground input lines 4, 5, 6, 7

Answer: Option B

Explanation:

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17. 

A microprocessor with a 16 bit address bus is used in a linear memory selection configuration. Address bus lines are directly uses as chip selects of memory chips with 4 memory chips the maximum addressable memory space is

A. 64 k
B. 16 k
C. 8 k
D. 4 k

Answer: Option A

Explanation:

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18. 

An I/O processor control the flow of information between

A. cache memory and I/O devices
B. main memory and I/O devices
C. 1 Two I/O devices
D. cache and main memories

Answer: Option B

Explanation:

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19. 

The process of entering data into ROM is called

A. writing
B. burning
C. decoding
D. registering

Answer: Option B

Explanation:

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20. 

Which of the following conversion is incorrect?

A. 2048.0625 = 100000000000.00012
B. 100000011.10012 = 131.562510
C. 1011012 = 458
D. Hexadecimal B6C7 = 4679110

Answer: Option C

Explanation:

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