C Programming · all questions

Pointer
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253

Questions

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Q41

The operator > and < are meaningful when used with pointers, if

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Q42

The declaration
int (*p) [5];
means

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Q43

Comment on the following?
const int *ptr;

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Q44

Determine Output:

#include<stdio.h>
void main()
{
      int *ptr, a=10;
      ptr = &a;
      *ptr += 1;
      printf("%d, %d", *ptr, a);
}

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Q45

A function 'p' that accepts a pointer to a character as argument and returns a pointer to an array of integer can be declared as

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Q46

What will be printed after compiling and running the following code?

main() 
{ 
    char *p; 
    printf("%d %d",sizeof(*p), sizeof(p));
}

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Q47

What will be the output of the following program code?

#include <stdio.h>
void main()
{
    int i=3, *j, **k;
    j = &i;
    k = &j;
    printf("%d%d%d", *j, **k, *(*k));
}

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Q48

Which of the following is the correct way of declaring a float pointer:

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Q49

Find the output of the following program.

void main()
{
   char *msg = "hi";
   printf(msg);
}

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Q50

Find the output of the following program.

void main()
{
   int array[10];
   int *i = &array[2], *j = &array[5];
   int diff = j-i;
   printf("%d", diff);
}

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Q51

Find the output of the following program.

void main()
{
   printf("%d, %d", sizeof(int *), sizeof(int **));
}

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Q52

Find the output of the following program.

void main()
{
   int i=10;  /* assume address of i is 0x1234ABCD */
   int *ip=&i;
   int **ipp=&&i;
   printf("%x,%x,%x", &i, ip, *ipp);  
}

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Q53

Which of the following statements are true after execution of the program.

void main()
{
   int a[10], i, *p;
   a[0] = 1;
   a[1] = 2;
   p = a;
   (*p)++;
}

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Q54

What is the base data type of a pointer variable by which the memory would be allocated to it?

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Q55

What would be the output for the following Turbo C code?

#include<stdio.h>
void main()
{
   int a[]={ 1, 2, 3, 4, 5 }, *p;
   p=a;
   ++*p;
   printf("%d ", *p);
   p += 2;
   printf("%d", *p);
}

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Q56

char* myfunc(char *ptr)
{
   ptr+=3;
   return(ptr);
}

void main()
{
   char *x, *y;
   x = "EXAMVEDA";
   y = myfunc(x);
   printf("y=%s", y);
}

What will be printed when the sample code above is executed?

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Q57

char *ptr;
char myString[] = "abcdefg";
ptr = myString;
ptr += 5;

what string does ptr point to in the sample code above?

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Q58

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int i = 10;
    int *p = &i;
    foo(&p);
    printf("%d ", *p);
    printf("%d ", *p);
}
void foo(int **const p)
{
    int j = 11;
    *p = &j;
    printf("%d ", **p);
}

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Q59

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    char *s= "hello";
    char *p = s;
    printf("%c\t%c", *(p + 3),  s[1]);
}

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Q60

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    int a[3] = {1, 2, 3};
    int *p = a;
    int **r = &p;
    printf("%p %p", *r, a);
}

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