Pointer Test(1st)

What will be the output of the following program code?

#include<stdio.h>
void main()
{
      int i = 10;
      void *p = &i;
      printf("%f", *(float *)p);
}

What will be the output of the following program code?

#include<stdio.h>
void main()
{
      int i = 10;
      void *p = &i;
      printf("%f", *(float *)p);
}

1 Mark(s)

Error
None of these.
10
0.000000

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

1 Mark(s)

int(*p(char *))[]
int *p(char *)[]
None of these.
int (*p) (char *)[]

What will be the output of the following program?

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

What will be the output of the following program?

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

1 Mark(s)

10
Compiler time error
Segmentation fault/runtime crash
Undefined behavior

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

1 Mark(s)

p is a pointer to a 5 elements integer array.
None of these.
The same as int *p[
p is one dimensional array of size 5, of pointers to integers.

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?

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?

1 Mark(s)

y=EDA
y=AMVEDA
y=MVEDA
y=VEDA
y=EXAMVEDA

Determine Output:

main()
{
      char *str1 = "abcd";
      char str2[] = "abcd";
      printf("%d %d %d", sizeof(str1), sizeof(str2), sizeof("abcd"));
}

Determine Output:

main()
{
      char *str1 = "abcd";
      char str2[] = "abcd";
      printf("%d %d %d", sizeof(str1), sizeof(str2), sizeof("abcd"));
}

1 Mark(s)

2 4 5
2 5 5
8 5 5
2 4 4

Find the output of the following program.

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

Find the output of the following program.

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

1 Mark(s)

hi followed by garbage value
Error
Garbage Value
h
hi

Determine output:

#include <stdio.h>
void main()
{
      char *p = NULL;
      char *q = 0;
      if(p)
            printf(" p ");
      else
            printf("nullp");
      if(q)
            printf("q");
      else
            printf(" nullq");
}

Determine output:

#include <stdio.h>
void main()
{
      char *p = NULL;
      char *q = 0;
      if(p)
            printf(" p ");
      else
            printf("nullp");
      if(q)
            printf("q");
      else
            printf(" nullq");
}

1 Mark(s)

p q
nullp nullq
Depends on the compiler
x nullq where x can be p or nullp depending on the value of NULL

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

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

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

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

1 Mark(s)

bcdefg
cdefg
efg
fg
defg

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

1 Mark(s)

unsigned int
No data type
int
Depends upon the type of the variable to which it is pointing.
float

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)++;
}

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)++;
}

1 Mark(s)

a[0] = 2
Compilation error
a[0] = 3
a[1] = 3
a[1] = 2

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

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

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

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

1 Mark(s)

What will be the output?

main() 
{ 
      char *p; 
      p = "Hello"; 
      printf("%cn",*&*p); 
}

What will be the output?

main() 
{ 
      char *p; 
      p = "Hello"; 
      printf("%cn",*&*p); 
}

1 Mark(s)

None of these.
Some address will be printed
Hello
H

Comment on the following?
const int *ptr;

1 Mark(s)

Both of the above
We can change the pointer as well as the value pointed by it.
We cannot change the value pointed by ptr.
We cannot change the pointer ptr itself.

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);
}

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);
}

1 Mark(s)

Error
3
Garbage value
6

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);
}

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);
}

1 Mark(s)

Choose the best answer.
Prior to using a pointer variable

1 Mark(s)

It should be both declared and initialized.
It should be declared.
It should be initialized.
None of these.

Comment on the following pointer declaration?

int *ptr, p;

Comment on the following pointer declaration?

int *ptr, p;

1 Mark(s)

ptr and p, both are pointers to integer.
ptr is a pointer to integer, p is not.
ptr and p both are not pointers to integer.
ptr is pointer to integer, p may or may not be.

The statement int **a;

1 Mark(s)

is legal but meaningless
is illegal
is syntactically and semantically correct
None of these.

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);  
}

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);  
}

1 Mark(s)

0x1234ABCD, 0x1234ABCD, 10
Syntax error
0x1234ABCD, 0x1234ABCD, 0x1234ABCD
0x1234ABCD, 10, 10
Runtime error

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));
}

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));
}

1 Mark(s)

333
000
433
Garbage Value
444

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

1 Mark(s)

The pointers point to elements of the same array.
None of these.
The pointers point to structure of similar data type.
The pointers point to data of similar type.

Find the output of the following program.

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

Find the output of the following program.

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

1 Mark(s)

2, 2
4, 4
0, 2
2, 0
2, 4

Determine Output:

void main()
{
      char far *farther, *farthest;
      printf("%d..%d", sizeof(farther), sizeof(farthest));
}

Determine Output:

void main()
{
      char far *farther, *farthest;
      printf("%d..%d", sizeof(farther), sizeof(farthest));
}

1 Mark(s)

4..2
4..4
2..2
2..4

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

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

1 Mark(s)

11, 11
10, 11
11, 10
10, 10

The address operator &, cannot act on

1 Mark(s)

Both of the above
Local variables
Arithmetic expressions
R-values
Members of a structure

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

1 Mark(s)

*float ptr;
float *ptr;
float ptr;
None of the above

Pointer Test(1st) : Question 1 of 27