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Digital Electronics

Digital Electronics
A three-state buffer has the following output states

 1, 0, float
 Set, Reset, Halt
 Both A and B
 High, Low, Float

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Digital Electronics
Which of the following codes is known as the 8421 code?

 Gray code
 BCD code
 XS-3 code
 ASCII code

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Digital Electronics
A read only memory in which the present contents must be erased before the new information can be stored is

 ROM
All of these
 PROM
 EAROM

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Digital Electronics
An EPROM is

 erasable but not programmable
 programmable and erasable
 volatile
 non erasable

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Digital Electronics
Which of the following is 1’s complement representation of +57

 11000110
 01000110
 00000001
 00111001

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Digital Electronics
The binary number 10101 is equivalent to decimal number ___________.

12
27
19
21

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