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Digital Electronics

Digital Electronics
Which of the following gate is a two-level logic gate

NOT gate
NAND gate
EXCLUSIVE OR gate
OR gate

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Digital Electronics
11001, 1001 and 111001 correspond to the 2’scomplement representation of the following set of numbers

 -6, -6 and -6 respectively
 -7, -7 and -7 respectively
 -25, -9 and -57 respectively
 25, 9 and 57 respectively

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Digital Electronics
OR-AND realization of a combinational circuit is equivalent to

 NAND-NAND realization
 NOR-NOR realization
 NAND-NOR realization
 NOR-NAND realization

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Digital Electronics
In an SR latch built from NOR gates, which condition is not allowed

 S=0, R=1
 S=0, R=0
 S=1, R=1
 S=1, R=0

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Digital Electronics
A device which converts decimal number into BCD form is called

 decoder
 multiplexer
 code converter
 encoder

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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.

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

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