C Programming and Technical

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Q. Where are the auto variables stored?

A. Auto variables are stored in main memory and their default value is a garbage value.

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C Other Question

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Q. What are merits and demerits of array in c?

A. Merits:
(a) We can easily access each element of array.
(b) Not necessity to declare too many variables.
(c) Array elements are stored in continuous memory location output?
Q. Why Preincrement operator is faster than Postincrement?

A. Evaluation of any expression is from left to right. Preincrement is faster because it doesn't need to save the current value for next instruction whereas Postincrement needs to saves current value to be incremented after execution of current instruction.