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Digital Electronics

Digital Electronics
A bubbled NAND gate is equivalent to a

 NOR gate
 OR gate
 X-OR gate
 NAND gate

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Digital Electronics
Simplified form of the function f = (x+y+xy)(x+z)

 x+yz
 y+xz
 x+xyz
 x+y

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Digital Electronics
A gate is disabled when its disable input is at logic 0. The gate is

 AND
 none of these
 OR
 NOR

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Digital Electronics
The number FF in base-16 systems will be equal to ________ in binary system.

 10011001
 10101010
 11101110
 11111111

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

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Digital Electronics
Which one of the following is 2’s complement of -68?

 01111100
 00111100
 11000100
 10111100

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