Digital Electronics
The codes in which each successive code word differs from the preceding one in only one bit position are called

 BCD codes
 cyclic codes
 sequential codes
 self-complementing codes

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Digital Electronics
ASCII

 is version II of the ASC standard
 is a subset of 8-bit EBCDIC
 is used only in western countries
 has 128 characters including control characters

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Digital Electronics
Statement(A): 2’s complement arithmetic is preferred in digital computers. Statement(R):The Hardware required to obtain the 2’s complement of a number is simple.

 Both A & R are true and R is the correct explanation of A
 A is false but R is true
 Both A & R are true but R is not the correct explanation of A
 A is true but R is false

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