1. In C, what is a pointer primarily used for?
2. What is the result of the expression sizeof(int*) in C, assuming an int pointer on a typical system?
3. In C, how do you declare a pointer variable that can store the address of an integer?
4. What is the purpose of the '->' operator in C when used with pointers?
5. In C, what is the value of a pointer variable if it hasn't been assigned any address?
6. What is the result of the expression *ptr in C, where ptr is a pointer to an int?
7. In C, what is the purpose of the 'void' pointer type (void*)?
8. How do you declare a pointer to a function that takes two integers and returns an integer in C?
9. What is the result of the expression ptr++ in C, where ptr is a pointer?
10. In C, what is the purpose of the 'const' keyword when used with a pointer declaration?
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