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Digital Electronics

Digital Electronics
Switching circuits are

 none of these
 hybrid circuits
 analog circuits
 digital circuits

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Digital Electronics
Which one of the following is correct sequence of the numbers represented in the series(2)3, (10)4, (11)5, (14)6, (22)7,…………….

 2, 4, 6, 10, 16……..
 2, 3, 4, 5, 6, ….
 2, 4, 6, 10, 12, …
 2, 4, 6, 8, 10, …..

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Digital Electronics
The voltage levels for positive logic system

 must necessarily be negative
 must necessarily be positive
 may be positive or negative
 must necessarily be 0 V and 5 V

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Digital Electronics
(44)8 in BCD 8421 code is

 00110110
 01100011
 00100100
 01000100

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Digital Electronics
A 15-bit Hamming code requires

 15 parity bits
 5 parity bits
 none of these.
 4 parity bits

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Digital Electronics
Which of the following gates is known as a coincidence detector?

 AND gate
 NAND gate
 X-NOR gate
 X-OR gate

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