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Digital Electronics

Digital Electronics
The inputs of a NAND gate are connected together. The resulting circuit is ___________.

NOT gate
OR gate
None of these
AND gate

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Digital Electronics
The output of a logic gate is 1 when all its inputs are at logic 0. The gate is either

 an AND or an X-NOR
 an X-OR or an X-NOR
 a NAND or a NOR
 an OR or a NAND

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Digital Electronics
A signed integer has been stored in a byte using 2’scomplement format. We wish to store the same integer in 16-bit word. We should copy the original byte to the less significant byte of the word and fill the more significant byte with

 0
 Equal to the MSB of the original byte
 1
 Complement of the MSB of the original byte

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

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

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Digital Electronics
ASCII and EBCDIC codes are

 alphanumeric codes
 numeric codes
 error correcting codes
 BCD codes

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Digital Electronics
2's Complement of 10101011 is

 10101011
 10101100
 00111100
 01010101

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