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Digital Electronics

Digital Electronics
What is the minimum number of NAND gates required to realize an X-OR gate?

 6
 5
 4
 3

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Digital Electronics
A read only memory in which the present contents must be erased before the new information can be stored is

 ROM
 PROM
All of these
 EAROM

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Digital Electronics
1s Complement of 11001010 is

 00110101
 00110111
 11001001
 11001011

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Digital Electronics
The decimal number 0.246 in binary is

 0.010111
 0.001111
 0.011011
 0.001101

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Digital Electronics
The maximum positive and negative numbers which can be represented in two’s complement form using n bits are respectively,

 +(2n-1-1),-2n-1
 +2n-1,-2n-1
 +(2n-1-1),-(2n-1-1)
 +2n-1,-(2n-1+1)

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Digital Electronics
In which code do the successive code characters differ in only one position?

 Gray code
 XS-3 code
 Hamming code
 8421 code

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MORE MCQ ON Digital Electronics

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