Electronics and Communication Engineering - Digital Electronics

21. 

For the given truth table, the correct Boolean expression is

A. XYZ + X YZ + X Y Z
B. X Y Z + XYZ + X YZ
C. X Y Z + XYZ + XY Z
D. XYZ + XYZ + XY Z

Answer: Option B

Explanation:

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22. 

The race condition in NOR SR latch occurs when

A. S = R = 1
B. S = 0, R = 1
C. S = 0, R = 0
D. S = 1, R = 0

Answer: Option A

Explanation:

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23. 

Flag bits in arithmetic unit provide

A. status type information
B. repeatability
C. facilities for rechecks
D. all of the above

Answer: Option A

Explanation:

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24. 

The generic microprocessor contains a zero and a carry flag. These are located on the
The 8156 of a figure has RAM locations from 2000 H to 20 FFH.

A. interrupt control
B. status register
C. either (a) or (b)
D. none of the above

Answer: Option B

Explanation:

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25. 

How many interrupts are there of 8085 μP?

A. 4
B. 5
C. 6
D. 8

Answer: Option B

Explanation:

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