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Digital Electronics

Digital Electronics
In the boolean algebra, a variable has ________ different state(s)/value(s).

 3
 2
 1
 4

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Digital Electronics
Which of the following is a digital device

 Light switch
 Resistance of a material
 Regulator of a fan
 Microphone

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

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

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Digital Electronics
For checking the parity of a digital word, it is preferable to use

 AND gates
 X-OR gates
 NOR gates
 NAND gates

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

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Digital Electronics
Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is

TTLLS
ECL
TTLAS
CMOS

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