Electronics and Communication Engineering - Digital Electronics

26. 

The code used to reduce the error due to ambiguity in reading of a binary optical encoder is

A. Octal code
B. Excess-3 code
C. gray code
D. BCD code

Answer: Option C

Explanation:

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27. 

In a clocked latch, clock drives

A. R NAND gate
B. S NAND gate
C. both R and S NAND gates
D. either R or S NAND gates

Answer: Option C

Explanation:

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28. 

Vectored interrupt is an interrupt that takes the program to a vector location. TRAP vectors to 0024 FI, RST 7.5 to 003 CH, RST 6.5 to 0034 H and

A. RST 5.5
B. RST 6.5
C. 24 H to 48 H
D. RST 5.5 to 002 CH

Answer: Option D

Explanation:

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29. 

ALU carries out

A. arithmetic operations
B. logic operations
C. both arithmetic and logic operations
D. none of the above

Answer: Option C

Explanation:

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30. 

The SID data received is

A. LSB first
B. LSB last
C. 1
D. none of these

Answer: Option A

Explanation:

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