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Digital Electronics

Digital Electronics
A device which converts 2421 code into 8421code is called a

 code converter
 code decoder
 coder
 code encoder

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Digital Electronics
Which one of the following even parity codes are in errors. (I)100110010 (II)011101010 (III)10111111010001010

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

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Digital Electronics
An AND gate will function as OR if

Either of the inputs is “1”
All the inputs to the gates are “1”
All the inputs and outputs are complemente'
All the inputs are ‘0’

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Digital Electronics
Combinations that are not listed for the input variables are

 Don't Care
 Overflow
 Borrow
 Carry

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Digital Electronics
11001, 1001 and 111001 correspond to the 2’scomplement representation of the following set of numbers

 -6, -6 and -6 respectively
 -25, -9 and -57 respectively
 -7, -7 and -7 respectively
 25, 9 and 57 respectively

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Digital Electronics
Which of the following gates is known as a coincidence detector?

 X-NOR gate
 AND gate
 NAND gate
 X-OR gate

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