Point out the error in the program

#include<stdio.h>
int main()
{
    int a=10;
    void f();
    a = f();
    printf("%d\n", a);
    return 0;
}
void f()
{
    printf("Hi");
}

Which of the following statements correct about the below program?

#include<stdio.h>

int main()
{
    struct emp
    {
        char name[25];
        int age;
        float sal;
    };
    struct emp e[2];
    int i=0;
    for(i=0; i<2; i++)
        scanf("%s %d %f", e[i].name, &e[i].age, &e[i].sal);

    for(i=0; i<2; i++)
        scanf("%s %d %f", e[i].name, e[i].age, e[i].sal);
    return 0;
}

 If the file name is enclosed in angle brackets

Find the output of below programs.

A. #include<stdio.h>
    int main()
    {
      printf("%d\n",x);
      return 0;
    }
    int x;
  B. #include<stdio.h>
      int main()
     {
       extern int x;
       printf("%d\n",x);
       return 0;
     }
     int x;

If the binary eauivalent of 5.375 in normalised form is 0100 0000 1010 1100 0000 0000 0000 0000, what will be the output of the program (on intel machine)?

#include<stdio.h>
#include<math.h>
int main()
{
    float a=5.375;
    char *p;
    int i;
    p = (char*)&a;
    for(i=0; i<=3; i++)
        printf("%02x\n", (unsigned char)p[i]);
    return 0;
}

Which of the following statements are correct about an array?

Which program is correct?

/*Program 1*/
#include<stdio.h>
int main()
{
  int  a[2][3]={1,2,3,4,5,6};
  int (*ptr)[3]=a; //Line 5
  printf("%d,%d",a[1][2],*(*(ptr+1)+2));
}
/*Program 2*/
#include<stdio.h>
int main()
{
  int  a[2][3]={1,2,3,4,5,6};
  int **ptr=a;   //Line 5
  printf("%d,%d",a[1][2],*(*(ptr+1)+2));
}

The below two lines are equivalent to
#define C_IO_HEADER 
#include C_IO_HEADER

Point out the error in the program

#include<stdio.h>
#define SI(p, n, r) float si; si=p*n*r/100;
int main()
{
    float p=2500, r=3.5;
    int n=3;
    SI(p, n, r);
    SI(1500, 2, 2.5);
    return 0;
}

Point out the error in the following program.

#include<stdio.h>
#include<stdlib.h>
int main()
{
    char *ptr;
    *ptr = (char)malloc(30);
    strcpy(ptr, "RAM");
    printf("%s", ptr);
    free(ptr);
    return 0;
}

Point out the correct statement which correctly free the memory pointed to by 's' and 'p' in the following program?

#include<stdio.h>
#include<stdlib.h>
int main()
{
    struct ex
    {
        int i;
        float j;
        char *s
    };
    struct ex *p;
    p = (struct ex *)malloc(sizeof(struct ex));
    p->s = (char*)malloc(20);
    return 0;
}

Which of the following statements correct about the below code?
maruti.engine.bolts=25;

What will be the output of the program?

#include<stdio.h>
void fun(int);
typedef int (*pf) (int, int);
int proc(pf, int, int);
int main()
{
    int a=3;
    fun(a);
    return 0;
}
void fun(int n)
{
    if(n > 0)
    {
        fun(--n);
        printf("%d,", n);
        fun(--n);
    }
}

Point out the error in the following program.

#include<stdio.h>
void display(int (*ff)());
int main()
{
    int show();
    int (*f)();
    f = show;
    display(f);
    return 0;
}
void display(int (*ff)())
{
    (*ff)();
}
int show()
{
    printf("TechEpi");
}

What will be the output of the program?

#include<stdio.h>
void fun(int*, int*);
int main()
{
    int i=5, j=2;
    fun(&i, &j);
    printf("%d, %d", i, j);
    return 0;
}
void fun(int *i, int *j)
{
    *i = *i**i;
    *j = *j**j;
}

What will be the output of the program?
#include<stdio.h>
#include<math.h>
int main()
{
    printf("%f\n", sqrt(36.0));
    return 0;
}

What will be the output of the program (sample.c) given below if it is executed from the command line?
cmd> sample Jan Feb Mar

/* sample.c */
#include<stdio.h>
#include<dos.h>
int main(int arc, char *arv[])
{
    int i;
    for(i=1; i<_argc; i++)
        printf("%s ", _argv[i]);
    return 0;
}

Which of the following function is more appropriate for reading in a multi-word string?

Each printf statement prints 2 addresses. Select the line in which 2 addresses are same.

#include<stdio.h>
int main()
{
  int a[6]={1,2,3,4,5,6};
  printf("%ul,%ul,",a,&a);   //Line 1
  printf("%ul,%ul,",a+1,&a+1); //Line 2 
  printf("%ul,%ul",a+6,&a+1);//Line 3
}

String operation such as strcat(s, t), strcmp(s, t), strcpy(s, t) and strlen(s) heavily     rely upon.

Comment on the following declaration?
    int (*ptr)(); // i)
    char *ptr[]; // ii)

Which of the following range is a valid long double (Turbo C in 16 bit DOS OS) ?

Point out the error in the following program.

#include<stdio.h>
#include<stdlib.h>
int main()
{
    static char *p = (char *)malloc(10);
    return 0;
}

Which of the following statements correct about the below program?

#include<stdio.h>

int main()
{
    union a
    {
        int i;
        char ch[2];
    };
    union a u1 = {512};
    union a u2 = {0, 2};
    return 0;
}