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Digital Electronics

Digital Electronics
Which of the following gates is known as a coincidence detector?

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

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Digital Electronics
The parity of the binary number 11011001 is

 not known
 same as the number of zeros
 odd
 even

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Digital Electronics
The code used in digital systems to represent decimal digits, letters, and other special characters such as + , – , . , * , etc. is

 ASCII
 hexadecimal
 octal
 natural BCD

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Digital Electronics
How many input and output required for demultiplexer ?

None of these
 one input and many output
 number of selection inputs and one output
 one input and one output

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Digital Electronics
In which code do the successive code characters differ in only one position?

 8421 code
 Hamming code
 Gray code
 XS-3 code

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Digital Electronics
In Boolean algebra, OR is represented by

 ×
 -
 /
 +

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