Electronics and Communication Engineering - Digital Electronics

21. 

A ripple counter has propagation delay.

A. True
B. False

Answer: Option A

Explanation:

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22. 

Adder is a combinational logic circuit.

A. True
B. False

Answer: Option A

Explanation:

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23. 

In a decimal digital computer, the number 127 is stored

A. 1111111
B. 0001 00100111
C. 10001
D. 11000111

Answer: Option A

Explanation:

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24. 

In 8085 microprocessor, which of the following interrupts has the lowest priority?

A. RST 5.5
B. RST 7.5
C. TRAP
D. INTR

Answer: Option A

Explanation:

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25. 

All digital circuits can be realised using only

A. EX-OR gates
B. Multiplexers
C. Half adders
D. OR gates

Answer: Option B

Explanation:

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