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Digital Electronics

Digital Electronics
Four ROM chips of 16 × 4 size have their address buses connected together. This system will be of size

 32 × 8
 16 × 16
 64 × 4
 256 × 1

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Digital Electronics
Minimization of logical expressions while designing digital systems helps in reducing

 space requirements
All of these
 cost
 power requirements

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

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

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Digital Electronics
In Boolean algebra, the bar sign (-) indicates ___________.

AND operation
NOT operation
OR operation
None of these

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Digital Electronics
To add two m-bit numbers, the required number of half adder is

 2m
 2m+1
 2m-1
 2m-1

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Digital Electronics
In simplification of a Boolean function of n variables, a group of 2m adjacent 1s leads to a term with

 n + m literals
 n – m literals
 m – 1 literals less than the total number of variables
 m + 1 literals less than the total number of variables

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