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Digital Electronics

Digital Electronics
NOT gates are to be added to the inputs of which gate to convert it to a NAND gate?

 X-OR
 OR
 AND
 NOT

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Digital Electronics
The following code is not a BCD code.

 8421 code
 Gray code
 XS-3 code
 all of these

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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
TTLAS
ECL
CMOS

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

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

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Digital Electronics
The maximum positive and negative numbers that can be represented in one’s complement using n-bits are respectively

 None of these
 +(2n-1-1),-2n-1
 +(2n-1-1),-(2n-1-1)
 +2n-1,-(2n-1-1)

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Digital Electronics
Which of the following represents (E3)16 ?

 (1CE)16+(A2)16
 (200)16-(11D)16
 (1BC)16-(DE)16
 (2BC)16-(1DE)16

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