Pointers_Structures

In a C Program if

int a = 5;

Int *ptr = &a;

then the printf statement with

&a, a, *ptr , ptr

• adrress, Value, Value, Adress

• address, value, value, value

• all address

• All values

If ptr is a pointer variable pointing to an array, then

"printf("%d",*(ptr++)) ;"

statement will print :

• Next location address

• Next location index value

• Next location value

• Compile time error

What will be output?

int i=10;

int *p;

p=&i;

i+=5;

printf("\n i=%d *p=%d", i,*p)

• i=10, *p=10

• i=10, *p=15

• i=15, *p=15

• i=15, *p=10

Code to change the 3rd array value to 50 using pointers

int main(){

int a[] = {10,20,30};

int *p = a;

----------------------;

}

• p+3 = 50

• *(p+3) = 50

• *p+2 = 50

• *(p+2) = 50

1. Prior to using a pointer variable it should be

• Declared

• Initialized

• Both declared and initialized

• None of these

What is the output of C program with arrays and pointers.?

int main()

{

int a[3] = {20,30,40};

printf("%d", *(a+1));

}

• 20

• 30

• 40

• Compiler error

If a variable is a pointer to a structure, then which of the following operator is used to access data members of the structure through the pointer variable?

• .

• &

• *

• ->

A pointer is

• A keyword used to create variables

• A variable that stores address of an instruction

• A variable that stores address of a varaibe

• All of the above

How do you make a pointer point to an existing variable?

int y = 0;

• int *x = y;

• int x = y;

• int *x = &y;

• int &x = *y;

Which operator connects the structure name to its member name?

• –

• <-

• .

• Both <- and .