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Digital Electronics

Digital Electronics
Positive integers must be represented by

 None of these
 Both A and B
 signed numbers
 unsigned number

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

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

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Digital Electronics
The binary equivalent of hexadecimal number 4F2D is

 0101 1111 0010 1100
 0100 1110 0010 1101
 0100 1111 0010 1101
 0100 1111 0010 1100

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Digital Electronics
Why decoder is used in the digital electronics ?

 To convert coded information into non coded form
None of these
 It is used to separate address bus and data bus
 To convert non coded information into coded form

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Digital Electronics
Which of these sets of logic gates are designated as universal gates?

 OR, NOT, AND.
 XOR, NOR, NAND.
 NOR, NAND, XNOR.
 NOR, NAND.

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Digital Electronics
Which of the logical operations is represented by the + sign in Boolean algebra ?

 NAND
 AND
 NOT
 OR

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