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Digital Electronics

Digital Electronics
For the design of a combinational circuit with four inputs using only NAND gates, the number of K-maps required for the simplification process is

 0
 1
 4
 2

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Digital Electronics
Odd parity of a bit stream can be tested using ________ gate.

 AND
 NOR
 XOR
 OR

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

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Digital Electronics
NAND. gates are preferred over others because these

consume least electronic power
have lower fabrication area
can be used to make any gate
provide maximum density in a chip.

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Digital Electronics
What is the requirement of fullsubstractor circuit ?

 Two inputs and three outputs
 Two inputs and two outputs
 Three inputs and one output
 Three inputs and two outputs

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Digital Electronics
An 8 × 4 ROM contains a decoder of size

 8 × 4
 3 × 4
 8 × 8
 3 × 8

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