Digital Electronics - ECE Questions and Answers

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A 4 bit ripple counter starts in 0000 state. When the counter reads 0010 the number of clock pulses which have occurred is

2 or 18

2 or 18 or 34

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The number FF in hexadecimal system is equivalent to number __________ in decimal system.

256

255

240

239

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The inputs A, B, C of the given figure are applied to a 3 input NOR gate. The output is

HIGH from 4 to 0

LOW from 0 to 4

HIGH from 0 to 1 and LOW from 1 to 4

LOW from 0 to 2 and HIGH from 2 to 4

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Assertion (A): XOR gate is not universal gate.

Reason (R): It is not possible to realize any Boolean function using XOR gates only.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is true, R is false

A is false, R is true

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The number of logic devices required in a Mod-16 synchronous counter are

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A 2 bit BCD D/A converter is a weighted resistor type with E_R = 1V, R = 1 MΩ and R_f = 10KΩ then Resolution in percent and volt is __________ .

1%, 1 mv

10%, 10 mv

10%, 1 mv

1%, 10 mv

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The number of bits in EBCDIC is