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Digital Electronics

Digital Electronics
Which number system has a base of 16

 Hexadecimal
 None
 Octal
 Decimal

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Digital Electronics
The output of a gate is LOW when at least one of its inputs is HIGH. This is true for

 AND
 OR
 NOR
 NAND

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Digital Electronics
The voltage levels for negative logic system

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

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Digital Electronics
The output of a logic gate is 0 when all its inputs are at logic 1. The gate is either

 a NAND or an X-NOR
 a NOR or an X-NOR
 a NAND or an X-OR
 a NAND or an AND

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Digital Electronics
The inputs of a NAND gate are connected together. The resulting circuit is ___________.

OR gate
NOT gate
AND gate
None of these

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Digital Electronics
The voltages corresponding to LOW and HIGH levels respectively are given below. Identify the voltages which correspond to negative logic system.

 5 V and 0 V
 0 V and 5 V
 –1.5 V and – 0.5 V
 1 V and 5 V

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