Data Structure Lab 1

What is the index of the first element in a C++ array?

• 1

• 0

• -1

• Depends on compiler

If an array int arr[5]; is declared, what is the valid index range?

• 1 ->5

• 0 ->5

• 0 ->4

• -1 ->4

What is the output of the following code?
int num = 5, *ptr = #

ptr = ptr + 10;

cout << num;

• 5

• 10

• 15

• error

Which of the following correctly declares a pointer to an integer?

• int p;

• int *p;

• int &p;

• pointer int p;

Consider the code:
int arr[3] = {1, 2, 3};

int *p = arr;

cout << *(p+2);

• 1

• 2

• 3

• garbage value

After executing the code below, what are the values of x and y?
int x = 5, y = 10;

int p = &x, q = &y;

p = q;

• x = 5, y = 10
  

• x = 10, y = 10

• x = 5, y = 5
  

• x = 0, y = 0

What will the following code output?
char ch = 'A'; // ASCII = 65

ch = ch + 2;

cout << ch;

• A

• B

• C

• 65

• 67

What is the output of this program?
int arr[4] = {2, 4, 6, 8};

int *ptr = arr;

cout << ptr << " " << (ptr+3);

• 2 6

• 2 8

• 4 8

• error

What is the output?
int num = 100;

int *p = &num;

int **pp = &p;

cout << **pp;

• address of num

• 100

• address of p

• error

What's the output of the following?
int arr[4] = {5, 10, 15, 20};

int *p = arr;

p += 2;

cout << *p;

• 5

• 10

• 15

• 20