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Digital Electronics

Digital Electronics
A bubbled NAND gate is equivalent to a

 X-OR gate
 NAND gate
 OR gate
 NOR gate

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Digital Electronics
X = 01110 and Y = 11001 are two 5-bit binary numbers represented in 2’s complement format. The sum of X and Y in 2’s complement format using 6 bits is

 101001
 0001111
 001000
 100111

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Digital Electronics
The voltage levels for negative logic system

 may be negative or positive
 must necessarily be negative
 must necessarily be positive
 must necessarily be 0 V and –5 V

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Digital Electronics
LSI means

 Large Symbol Invertor
 Large Scale Invertor
 Large Symbol Integration
 Large Scale Integration

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

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

 00001000
 00000011
 00001100
 01110011

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