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Digital Electronics

Digital Electronics
Which of the following is 2’s complement of +12?

 00001100
 00001000
 00000011
 01110011

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Digital Electronics
Consider the following multiplication: (10w1z) × (15)10 = (y01011001)2 Which one of the following gives appropriate values of w,y and z?

 w = 0,y = 0,z = 1
 w = 0,y = 1,z = 1
 w = 1,y = 1,z = 0
 w = 1,y = 1,z = 1

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Digital Electronics
Which of the following is a self-complementing code?

 XS-3 code
 Gray code
 cyclic code
 Hamming code

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Digital Electronics
Slowest memory element is

 ROM
 Cache
 Hard Drive
 RAM

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Digital Electronics
The NOR-NOR realization is equivalent to

 OR-NOT realization
 OR-AND realization
 NOT-AND realization
 AND-OR realization

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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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