Arrays Questions and Answers updated daily – C Language



13 Arrays Questions and answers section with explanation for various online exam preparation, various interviews, C Language Arrays online test. Arrays Questions with detailed description, explanation will help you to master the topic.

Arrays Questions

1.
Which of the following statements are correct about 6 used in the program?
int num[6];
num[6]=21;



SHOW ANSWER
Correct Ans:In the first statement 6 specifies a array size, whereas in the second statement it specifies a particular element of array.
Explanation:


2.
Which of the following statements are correct about an array?
1: The array int num[26]; can store 26 elements.
2: The expression num[1] designates the very first element in the array.
3: It is necessary to initialize the array at the time of declaration.
4: The declaration num[SIZE] is allowed if SIZE is a macro.



SHOW ANSWER
Correct Ans:1,4
Explanation:


3.
What will be the output of the program if the array begins 1200 in memory?

#include<stdio.h>

int main()
{
    int arr[]={2, 3, 4, 1, 6};
    printf("%u, %u, %un", arr, &arr[0], &arr);
    return 0;
}



SHOW ANSWER
Correct Ans:1200,1200,1200
Explanation:


4.
   What will be the output of the program ?

#include

int main()
{
    float arr[] = {12.4, 2.3, 4.5, 6.7};
    printf("%dn", sizeof(arr)/sizeof(arr[0]));
    return 0;
}



SHOW ANSWER
Correct Ans:4
Explanation:


5.
What will be the output of the program ?

#include<stdio.h>

int main()
{
    int arr[1]={10};
    printf("%dn", 0[arr]);
    return 0;
}



SHOW ANSWER
Correct Ans:10
Explanation:


6.
What will be the output of the program in Turb C (under DOS)?

#include<stdio.h>

int main()
{
    int arr[5], i=0;
    while(i<5)
        arr[i]=++i;

    for(i=0; i<5; i++)
        printf("%d, ", arr[i]);

    return 0;
}



SHOW ANSWER
Correct Ans:garbage value 1,2,3,4
Explanation:


7. What will be the output of the program if the array begins at 65472 and each integer occupies 2 bytes?
#include<stdio.h>

int main()
{
    int a[3][4] = {1, 2, 3, 4, 4, 3, 2, 1, 7, 8, 9, 0};
    printf("%u, %un", a+1, &a+1);
    return 0;
}



SHOW ANSWER
Correct Ans:65480,65496
Explanation:


8.
What will be the output of the program ?

#include<stdio.h>
void fun(int **p);

int main()
{
    int a[3][4] = {1, 2, 3, 4, 4, 3, 2, 8, 7, 8, 9, 0};
    int *ptr;
    ptr = &a[0][0];
    fun(&ptr);
    return 0;
}
void fun(int **p)
{
    printf("%dn", **p);
}



SHOW ANSWER
Correct Ans:1
Explanation:


9.
What will be the output of the program ?

#include<stdio.h>

int main()
{
    void fun(int, int[]);
    int arr[] = {1, 2, 3, 4};
    int i;
    fun(4, arr);
    for(i=0; i<4; i++)
        printf("%d,", arr[i]);
    return 0;
}
void fun(int n, int arr[])
{
    int *p=0;
    int i=0;
    while(i++ < n)
        p = &arr[i];
    *p=0;
}



SHOW ANSWER
Correct Ans:1,2,3,4
Explanation:


10.
What will be the output of the program ?

#include<stdio.h>

int main()
{
    int a[5] = {5, 1, 15, 20, 25};
    int i, j, m;
    i = ++a[1];
    j = a[1]++;
    m = a[i++];
    printf("%d, %d, %d", i, j, m);
    return 0;
}



SHOW ANSWER
Correct Ans:3,2,15
Explanation:


11. In C, if you pass an array as an argument to a function, what actually gets passed?



SHOW ANSWER
Correct Ans:Base address of the array
Explanation:
The statement 'C' is correct. When we pass an array as a funtion argument, the base address of the array will be passed.


12.
What does the following declaration mean?
int (*ptr)[10];



SHOW ANSWER
Correct Ans:ptr is a pointer to an array of 10 integers
Explanation:


13. What will happen if in a C program you assign a value to an array element whose subscript exceeds the size of array?



SHOW ANSWER
Correct Ans:The program may crash if some important data gets overwritten
Explanation:


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