# Electronics and Communication Engineering - Digital Electronics

16.

When two 16-input multiplexers drive a 2-input MUX, what is the result?

 A. 2-input MUX B. 4-input MUX C. 16-input MUX D. 32 input MUX

Explanation:

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17.

Two voltages are -5 V and -10 V. In positive logic

 A. -5 V is 1 and -10 V is 0 B. -10 V is 1 and -5 V is 0 C. -5 V is 1 in some circuits and 0 in others D. -10 V is 1 in some circuits and 0 in others

Explanation:

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18.

In floating point number 0110100000010101, the exponent is equal to __________ 10

 A. 11 B. -11 C. 10 D. -10

Explanation:

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19.

figure shows three pulse train inputs to a 3-input OR gate. Assuming positive logic, the output pulse rate train in figure (b) would be

 A. B. C. D.

Explanation:

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20.

The advantage of using dual slope ADC in digital voltmeter is that

 A. its conversion time is small B. its accuracy is high C. its output is in BCD D. it does not require a comparator