Java C Pointers Test 1 – Java C Pointers Question and Answers

Are the three declarations char **apple, char *apple[], and char apple[][] same?

Is the NULL pointer same as an uninitialised pointer?

Will the program compile in Turbo C?

#include
int main()
{
int a=10, *j;
void *k;
j=k=&a;
j++;
k++;
printf(“%u %u “, j, k);
return 0;
}

Is this a correct way for NULL pointer assignment?
int i=0;
char *q=(char*)i;

Is there any difference between the following two statements?
char *p=0;
char *t=NULL;

Will the following program give any warning on compilation in TurboC (under DOS)?

#include

int main()
{
int *p1, i=25;
void *p2;
p1=&i;
p2=&i;
p1=p2;
p2=p1;
return 0;
}

The following program reports an error on compilation.

#include
int main()
{
float i=10, *j;
void *k;
k=&i;
j=k;
printf(“%f “, *j);
return 0;
}

Are the expression *ptr++ and ++*ptr are same?

Will the program compile?

#include
int main()
{
char str[5] = “JavaTpoint”;
return 0;
}

A pointer is

What will be the output of the program ?

#include

int main()
{
int i=3, *j, k;
j = &i;
printf(“%d “, i**j*i+*j);
return 0;
}

What is (void*)0?

Can you combine the following two statements into one?

char *p;
p = (char*) malloc(100);

The operator used to get value at address stored in a pointer variable is

What will be the output of the program ?

#include

int main()
{
static char *s[] = {“black”, “white”, “pink”, “violet”};
char **ptr[] = {s+3, s+2, s+1, s}, ***p;
p = ptr;
++p;
printf(“%s”, **p+1);
return 0;
}

How many bytes are occupied by near, far and huge pointers (DOS)?

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?

What would be the equivalent pointer expression for referring the array element a[i][j][k][l]

In which header file is the NULL macro defined?

What will be the output of the program ?

#include

int main()
{
int x=30, *y, *z;
y=&x; /* Assume address of x is 500 and integer is 4 byte size */
z=y;
*y++=*z++;
x++;
printf(“x=%d, y=%d, z=%d “, x, y, z);
return 0;
}