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Digital Electronics

Digital Electronics
In which of the following codes do the successive characters differ in only 1-bit position?

 2421 code
 8421 code
 binary code
 cyclic code

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Digital Electronics
If two numbers in excess-3 code are added and the result is less than 9, then to get equivalent binary

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

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Digital Electronics
The output of a logic gate is 1 when all its inputs are at logic 0. The gate is either

 an X-OR or an X-NOR
 an AND or an X-NOR
 a NAND or a NOR
 an OR or a NAND

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Digital Electronics
EBCDIC code is a

 5-bit code
 7-bit code
 10-bit code
 8-bit code

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Digital Electronics
Which of the following logic circuits is the fastest ?

 All have same speed.
 DTL.
 TTL.
 RTL.

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Digital Electronics
The binary equivalent of hexadecimal number 4F2D is

 0100 1111 0010 1100
 0100 1110 0010 1101
 0100 1111 0010 1101
 0101 1111 0010 1100

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