C Programming
Comment on the following pointer declaration?int *ptr, p;

ptr is pointer to integer, p may or may not be.
ptr is a pointer to integer, p is not.
ptr and p, both are pointers to integer.
ptr and p both are not pointers to integer.

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C Programming
What is the difference between a declaration and a definition of a variable?

A definition occurs once, but a declaration may occur many times.
A declaration occurs once, but a definition may occur many times.
Both can occur multiple times, but a declaration must occur first.
There is no difference between them.
Both can occur multiple times, but a definition must occur first.

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