Memory Allocation MCQs

What will be the error (if any) in the following C code?

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int main()
{
    char *p;
    *p = (char)calloc(10);
    strcpy(p, "HELLO");
    printf("%s", p);
    free(p);
    return 0;
}

What will happens if the statement free(a) is removed in the following C code?

#include<stdio.h>
#include<stdlib.h>
main()
{
    int *a;
    a=(int*)malloc(sizeof(int));
    *a=100;
    printf("*a%d",*a);
    free(a);
    a=(int*)malloc(sizeof(int));
    *a=200;
    printf("a%p",a);
    *a=200;
    printf("a%d",*a);
}

In the function realloc(), if the new size of the memory block is larger than the old size, then the added memory . . . . . . . .

What will be the output of the following C code if it is executed on a 32 bit processor?

#include<stdio.h>
#include<stdlib.h>
int main()
{
    int *p;
    p = (int *)malloc(20);
    printf("%d\n", sizeof(p));
    free(p);
    return 0;
}

Garbage collector frees the programmer from worrying about . . . . . . . .

Suppose we have a one dimensional array, named 'x', which contains 10 integers. Which of the following is the correct way to allocate memory dynamically to the array 'x' using malloc()?

Queue data structure works on the principle of . . . . . . . .

Which of the following is an example of static memory allocation?

What will be the output of the following C code? (Given that the size of array is 4 and new size of array is 5)

#include<stdio.h>
#include<stdlib.h>
main()
{
    int *p,i,a,b;
    printf("Enter size of array");
    scanf("%d",&a);
    p=(int*)malloc(a*sizeof(int));
    for(i=0;i<a;i++)
    printf("%d\n",i);
    printf("Enter new size of array");
    scanf("%d",&b);
    realloc(p,b);
    for(i=0;i<b;i++)
    printf("%d\n",i);
    free(p);
}