Electronics and Communication Engineering - Digital Electronics

11. 

In 8085 microprocessor, what is the memory word size?

A. 6 bits
B. 8 bits
C. 12 bits
D. 16 bits

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

12. 

Which of the following memory is preferred in case of calculators?

A. Dynamic RAM
B. Dynamic ROM
C. Static ROM
D. Static RAM

Answer: Option A

Explanation:

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13. 

Which device changes parallel data to serial data?

A. Decoder
B. Multiplexer
C. Demultiplexer
D. Flip flop

Answer: Option B

Explanation:

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14. 

A 12 bit ADC is employed to convert an analog voltage of zero to 10 volts. The resolution of the ADC is

A. 2.44 mV
B. 24.4 mV
C. 83.3 mV
D. 1.2 V

Answer: Option A

Explanation:

Full scale measurement range = 0 to 10 volts.

ADC resolution is 12 bits: 2^12 = 4096 quantization levels.

ADC voltage resolution is: (10-0)/4096 = 0.00244 volts = 2.44 mV.


15. 

Race condition always arises in

A. synchronous circuit
B. asynchronous circuit
C. combinational circuit
D. digital circuit

Answer: Option B

Explanation:

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