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Digital Electronics

Digital Electronics
(11011) 2 in BCD 8421 code is

 11011001
 00011011
 01101100
 00100111

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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

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

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Digital Electronics
A NAND gate is called a universal logic element because

Any logic function can be realized by NAND gates alone
Many digital computers use NAND gates.
It is used by everybody
All the minization techniques are applicable for optimum NAND gate realization

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Digital Electronics
An exclusive NOR gate is logically equivalent to

 complement of a NOR gate
 inverter followed by an X-OR gate
 X-OR gate followed by an inverter
 NOT gate followed by a NOR gate

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Digital Electronics
Boolean algebra is also known as

 Transistor algebra
 Counting algebra
 Gate algebra
 Switching algebra

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Digital Electronics
Why encoder is used in the digital electronics ?

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

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