Quiz 9: Pointer

The expression:

int *p = new int[20];

• allocates 20 integers and assigns the base address to p

• allocates 20 integers off the stack local to a block

• reads in 20 integer values from cin

• allocates an integer of size 20 bytes

Which form of the operator delete would you use to deallocate free store memory allocated by this statement:

Students *student_list = new Students[size];

• delete [] student_list

• delete student_list

• delete [] students

• delete students[size]

Which of the following correctly displays the memory address of the variable named menu?

int menu = 23;

• cout << *menu;

• cout << menu;

• cout << &menu;

• cout << &menu*;

What does the variable i contain after the following code executes?

int i = 17;

int *p = &i;

*p = 98;

• 98

• 17

• 81

• 0

Allocation of memory storage for statically allocated variables occurs during ________

while memory allocation for dynamically allocated variables occurs during ___________.

• (load time) and (compile time)

• (load time) and (run time)

• (run time) and (compile time)

• (compile time) and (load time)

Given:

int *p1;

int *p2;

p1 = new int;

p2 = p1;

delete p1;

p1 = NULL;

Which of the following best describe the current situation with p2?

• p2 is pointing at where p1 is pointing at.

• p2 is not pointing at any memory location.

• p2 is a dangling pointer.

• p2 is also assigned value NULL.

Suppose the following structure and variables are declared:

struct Student {

string name;

string email;

};

Student john;

Student* p = &john;

Which of the following statements print the student john's email?

• cout << p.email;

• cout << p[email];

• cout << john->email;

• cout << p->email;

Given the following pointer variables:

int x;

int* p;

p = &x;

Which of the following code segments will cause segmentation fault?

• *p = 100.12;

• p = NULL;

  cout << *p;

• p = NULL;

  cout << p;

• p = NULL;

  cout << &p;

In C++11, the _______ keyword was introduced to represent the address 0.

• NULL

• null

• nullptr

• weak_ptr

Every byte in the computer's memory is assigned a unique:

• pointer

• address

• dynamic allocation

• name