Quiz for Pointers to functions

Q1: What is a pointer to a function in C?

A. A pointer storing the address of a variable B. A pointer storing the address of a function C. A pointer storing the return value of a function D. A pointer storing function arguments

Q2: What is the correct syntax to declare a pointer to a function returning int and taking two ints?

A. int *fptr(int, int); B. int (*fptr)(int, int); C. int fptr*(int, int); D. int &(fptr)(int, int);

Q3: Which operator is used to get the address of a function?

A. & B. * C. -> D. .

Q4: How do you call a function using its pointer?

A. *ptr(); B. ptr; C. ptr(); D. &ptr();

Q5: Function pointers are often used for?

A. Memory allocation B. String manipulation C. Callback mechanisms D. File handling

Q6: Which of these is a correct declaration of a function pointer to a void function with no parameters?

A. void fptr; B. void (*fptr)(); C. void *fptr(); D. void &(fptr)();

Q7: Can a function pointer be NULL?

A. Yes B. No C. Only for void functions D. Only for int functions

Q8: Which header defines qsort that uses a function pointer as a comparator?

A. stdio.h B. stdlib.h C. string.h D. math.h

Q9: What is passed to qsort as its fourth parameter?

A. Pointer to array size B. Pointer to comparator function C. Pointer to memory block D. Pointer to malloc function

Q10: Can function pointers point to overloaded functions in C?

A. Yes B. No C. Only in C++ D. Only for static functions

Q11: Which function type can a function pointer point to?

A. Any function with matching signature B. Any function regardless of parameters C. Only void functions D. Only static functions

Q12: What happens if you call a NULL function pointer?

A. Segmentation fault B. Compilation error C. Runs with garbage output D. No effect

Q13: Can you store a function’s address without using & operator?

A. Yes B. No C. Only for static functions D. Only for global functions

Q14: Which is a valid function pointer initialization?

A. int (*fp)() = myFunc; B. int fp() = myFunc; C. int (*fp)() = &myFunc; D. Both A and C

Q15: Can you pass a function pointer as an argument to another function?

A. Yes B. No C. Only with macros D. Only for inline functions

Q16: Which is true about function pointers and arrays of function pointers?

A. Function pointers cannot be in arrays B. They can be stored in arrays C. Only void-returning functions can be stored D. Only static functions can be stored

Q17: What is the return type of a function pointer?

A. It is the same as the function it points to B. Always void C. Always int D. Depends on compiler

Q18: Which of these is a correct way to typedef a function pointer?

A. typedef int fptr; B. typedef int (*fptr)(int, int); C. typedef int &(fptr)(int, int); D. typedef *fptr(int, int);

Q19: What is the size of a function pointer in C?

A. Same as data pointer B. Always 8 bytes C. Always 4 bytes D. Depends on return type

Q20: Can a function pointer point to main function?

A. Yes B. No C. Only for recursion D. Only for static main