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Digital Electronics

Digital Electronics
A sequence of binary digits is known as

 word string
 input string
 bit string
 byte string

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Digital Electronics
Which of the following gates cannot be used as an inverter?

 AND
 NOR
 X-NOR
 NAND

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Digital Electronics
The following code is not a BCD code.

 Gray code
 XS-3 code
 8421 code
 all of these

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

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

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Digital Electronics
The number of 1 in 8-bit representation of 127 in 2’s complement form is m and that in 1,s complement form is n. What is the value of m:n?

 2:1
 1:2
 1:1
 2:3

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Digital Electronics
In which of the following codes do the successive characters differ in only 1-bit position?

 binary code
 8421 code
 2421 code
 cyclic code

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