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Digital Electronics

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

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

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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

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

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

 code converter
 multiplexer
 decoder
 encoder

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Digital Electronics
(44)8 in BCD 8421 code is

 01100011
 00110110
 00100100
 01000100

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Digital Electronics
The implicants which will definitely occur in the final expression are called

 essential prime implicants
 selective prime implicants
 redundent prime implicants
 prime implicants

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Digital Electronics
The logic expression AB can be implemented by giving the inputs A and B to a two-input

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

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