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Digital Electronics

Digital Electronics
To get an excess-3 code from BCD code

 0011 is subtracted
 0110 is subtracted
 0110 is added
 0011 is added

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Digital Electronics
Choose the option which is not a code conversion standard

 Excess-3 code
 Gray code
 BCD code
 Truth code

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

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

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Digital Electronics
The fan put of a 7400 NAND gate is

2TTL
10TTL
8TTL
5TTL

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Digital Electronics
The boolean algebra is mostly based on

 Standard theorem
 Boolean theorem
 De Morpans theorem
 De Morgans theorem

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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.

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

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