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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?

 NOR
 OR
 NAND
 X-OR

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Digital Electronics
A computer has a word length of 8 bits (including sign). It is required to determine the range of integers that can be stored in the computer. If 2’s complement is used to represent the numbers, then the range will be

 -256 to 255
 -256 to 256
 -128 to 128
 -128 to 127

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Digital Electronics
What is the minimum number of NAND gates required to realize an X-OR gate?

 4
 5
 3
 6

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Digital Electronics
In ULSI, the number of gate circuits per chip is

 > 50,000
 1,00,000 to 10,00,000
 > 1,00,000
 50,000 to 99,999

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

 encoder
 multiplexer
 decoder
 code converter

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Digital Electronics
Positive integers must be represented by

 Both A and B
 signed numbers
 unsigned number
 None of these

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