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Digital Electronics

Digital Electronics
Which of the following logic circuits is the fastest ?

 TTL.
 RTL.
 DTL.
 All have same speed.

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Digital Electronics
A byte is equal to ________ bits.

 8
 32
 4
 16

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Digital Electronics
A signed integer has been stored in a byte using 2’scomplement format. We wish to store the same integer in 16-bit word. We should copy the original byte to the less significant byte of the word and fill the more significant byte with

 Complement of the MSB of the original byte
 0
 Equal to the MSB of the original byte
 1

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Digital Electronics
The main equation for a D flip flop is

 Q=0
 Q=D'
 Q=D
 Q=1

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Digital Electronics
Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is

CMOS
TTLAS
TTLLS
ECL

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Digital Electronics
The output of a gate is HIGH if and only if all its inputs are LOW. It is true for

 NOR
 X-OR
 X-NOR
 NAND

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