Self Assesment Questions 5

Instructions

For each question choose the single response which best answers the question, or which completes the statement most accurately.

Question 47: What is a function pointer useful for?

Telling the hardware which function is to be called next

Providing a form of polymorphism in imperative languages (such as C)

Linking a series of function calls (analogous to a linked list of data)

Ensuring that a function returns to the correct place in the code, after it executes

Passing parameters to a function in a language which does not have references

Question 48: Which of the following is a valid C/C++ function pointer definition

int *(f)();

int* f();

(int*)f();

(int* f)();

None of the above

Question 49: Which of the following declares a pointer to a function g, which takes two ints and returns nothing?

(*g)(int*2);

(*g)(int,int);

void (*g)(int,int);

(*g)(int,int) = void;

*(void g(int,int));

Question 50: Which of the following is a correct call to the function pointed to by the function pointer g?

g->(1,2);

g(1,2);

*g(1,2);

(*g)(1,2);

void (*g)(1,2);

Question 51: What is the relationship between function pointers and polymorphism?

Function pointers allow us to implement a form of polymorphism

Function pointers allow us to prevent polymorphism

Function pointers are a necessary prerequisite for polymorphism

Function pointers make polymorphism necessary in a program

There is no relationship between function pointers and polymorphism

Last updated: July 27, 2005