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Digital Electronics

Digital Electronics
What logic function is produced by adding an inverter to each input and output of an AND gate?

 OR
 X-OR
 NOR
 NAND

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

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

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Digital Electronics
What are the values of R1 and R2 respectively in the expression (235)R1 = (565)10 = (1065)R2

 16, 8
 8, 16
 6, 16
 12, 8

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Digital Electronics
Assuming 8 bits for data, 1 bit for parity, I start bit and 2 stop bits, the number of characters that 1200 BPS communication line can transmit is.

10 CPS
120 CPS
12 CPS
None of these

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Digital Electronics
The decimal equivalent of the highest possible address for an 8-bit address bus is

 128
 255
 8
 256

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Digital Electronics
A NAND gate is called a universal logic element because

It is used by everybody
Many digital computers use NAND gates.
All the minization techniques are applicable for optimum NAND gate realization
Any logic function can be realized by NAND gates alone

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