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C Variables Tricky Interview Questions and Answers
In most of the MNC interview questions such as in ZOHO interview question, IVTL Infoview interview questions, Amazon interview questions, GOOGLE interview questions, Infosys interview questions and even in Voonik interview questions, We come across several Tricky C Questions about which 2:5 of the questions are from Variables in c. Solving that kind of tricky C questions is not an easy task for all C programmers. We need more practices to solve it with ease. So we provide 25+ interesting C questions in Variables to make your MNC interview very easy.
C Variables Questions
21. What will be the output of the C program?
#include<stdio.h>
int main()
{
char *ptr = "Cat";
*ptr = 'B';
printf("%s", ptr);
return 0;
}
x
Option: D
Explanation
*ptr='B', trying to change the character at base address to 'C' of a constant string, which is impossible and it leads to runtime error.
22. What will be the output of the C program?
#include<stdio.h>
int main()
{
char arr1[50];
char arr2[50] = "aptitude in c";
arr1 = arr2;
printf("%s", arr1);
return 0;
}
x
Option: A
Explanation
arr1 refers to base address and is constant. Hence raing to lvalue required compile time error.
23. What will be the output of the C program?
#include<stdio.h>
int main()
{
char arr1[] = "aptitude in c";
char arr2[] = "aptitude in c";
if(arr1 == arr2)
printf("cheers");
return 0;
}
x
Option: D
Explanation
Here we are comparing both base addresses and they never going to be same, hence No output.
24. What will be the output of the C program?
#include<stdio.h>
int main()
{
char *ptr, **ptr1;
printf("%u", sizeof(p));
printf("%u", sizeof(q));
return 0;
}
x
Option: B
Explanation
The size of pointer variable of any data type(char, int, double, float) will be 4 and are same.
25. What will be the output of the C program?
#include<stdio.h>
#define num 10
int main()
{
#define num 50
printf("%d",num);
return 0;
}
x
Option: C
Explanation
The pre processor directives in c programming can be redefined anywhere in the program. So the most recently assigned value will be outputted.
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