C Array Test 2

6) What will be the output of the below program?

#include<stdio.h>
main(){	
   int x[] = {100, 200, 300};   
   printf("%d", *x +1);
}

The correct option is (c).

Explanation:

In program *x refers to 100 and adding a 1 to *x gives 101.

Therefore the output is101.

The correct option is (b).

Explanation:

The Square parenthesis signifies an array at declaration and the type is char *. So it is an array of character pointer.

Therefore "arr" is an array of 20 character pointers.

#include<stdio.h>
void main()
{
   char a[] = "C++";
   printf("%s ",a);
   a++;
   printf("%s",a);
}

The correct option is (d).

Explanation:

In program 'a' refers to constant address and the constant address variable is not allowed to be incremented.

Therefore the program will generate compile error in output.

 
int num[5];
num[5]=20;

In the first statement 5 specifies an array size, whereas in the second statement it specifies a particular element of array.
In the first statement 5 specifies a particular element, whereas in the second statement it specifies a array size.
In the first statement 5 specifies a particular element, whereas in the second statement it specifies a type.
In both the statement 5 specifies array size.

The correct option is (a).

Explanation:

The statement int num[5]; specifies the size of array and num[5]=20; specifies the particular element (6th element) of the array.

Therefore in first statement 5 specifies an array size, whereas in second element it specifies a particular element of an array.