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Digital Electronics

Digital Electronics
In which of the following codes do the successive characters differ in only 1-bit position?

 8421 code
 cyclic code
 2421 code
 binary code

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Digital Electronics
The main equation for a D flip flop is

 Q=D
 Q=1
 Q=D'
 Q=0

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Digital Electronics
An X-OR gate gives a high output

 if the decimal value of digital word is even
 if there are odd number of 1s
 if it has even number of 0s
 for odd decimal value.

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Digital Electronics
Why generic array logic (GAL) device was invented ?

 Mask programmable
 Reprogrammable
None of these
 One-time programmable

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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

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

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Digital Electronics
In ULSI, the number of gate circuits per chip is

 > 1,00,000
 > 50,000
 1,00,000 to 10,00,000
 50,000 to 99,999

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