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Digital Electronics

Digital Electronics
A bubbled NAND gate is equivalent to a

 OR gate
 NAND gate
 NOR gate
 X-OR gate

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Digital Electronics
Which of the following is known as a mod-2 adder?

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

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Digital Electronics
The parity of the binary number 11011001 is

 odd
 same as the number of zeros
 not known
 even

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Digital Electronics
An EPROM

All of these
 is programmable
 is of random-access type
 is non volatile

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Digital Electronics
A device which converts 2421 code into 8421code is called a

 code converter
 coder
 code decoder
 code 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 positive logic system.

 0 V and 5 V
 1 V and -5 V
 5 V and 0 V
 –1.5 V and – 5 V

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