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Digital Electronics

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

 00001000
 01110011
 00000011
 00001100

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Digital Electronics
Consider the operation 24+17 = 40 .What is the correct base of number so that operation is correct?

 11
 13
 10
 12

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Digital Electronics
Digital circuit can be made by the repeated use of ___________

NAND gates
OR gates
None of these
NOT gates

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

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Digital Electronics
In which of the following base systems is 123 not a valid number?

Base 3
Base 16
Base 10
Base 8

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Digital Electronics
Which of the following BCD codes with an odd parity bit included in the end of code group, have error in the code? (I)1001010110000 (II)0100011101100 (III)0111110000011 (IV)1000011000101

 Both (I) & (II)
 Only (II)
 Both (I)&(IV)
 Both (II)&(III)

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