This set of C Multiple Choice Questions & Answers (MCQs) focuses on “Typedefs – 1”.
Pre-requisite for C Typedef MCQ set: Video Tutorial on C Typedef.
1. What will be the output of the following C code?
#include <stdio.h>typedef struct student
{char *a;
}stu;
void main()
{struct stu s;
s.a = "hi";
printf("%s", s.a);
}
a) Compile time error
b) Varies
c) hi
d) h
View Answer
Explanation: None.
2. What will be the output of the following C code?
#include <stdio.h>typedef struct student
{char *a;
}stu;
void main()
{struct student s;
s.a = "hey";
printf("%s", s.a);
}
a) Compile time error
b) Varies
c) he
d) hey
View Answer
Explanation: None.
3. What will be the output of the following C code?
#include <stdio.h>typedef int integer;
int main()
{int i = 10, *ptr;
float f = 20;
integer j = i;
ptr = &j;
printf("%d\n", *ptr);
return 0;
}
a) Compile time error
b) Undefined behaviour
c) Depends on the standard
d) 10
View Answer
Explanation: None.
4. What will be the output of the following C code?
#include <stdio.h>int (*(x()))[2];
typedef int (*(*ptr)())[2] ptrfoo;
int main()
{ptrfoo ptr1;ptr1 = x;
ptr1();
return 0;
}int (*(x()))[2]
{int (*ary)[2] = malloc(sizeof*ary);
return &ary;
}
a) Compile time error
b) Nothing
c) Undefined behaviour
d) Depends on the standard
View Answer
Explanation: None.
5. What will be the output of the following C code?
#include <stdio.h>int *(*(x()))[2];
typedef int **(*ptrfoo)())[2];
int main()
{ptrfoo ptr1;ptr1 = x;
ptr1();
return 0;
}int *(*(x()))[2]
{int (*ary)[2] = malloc(sizeof * ary);
return &ary;
}
a) Compile time error
b) Nothing
c) Undefined behaviour
d) Depends on the standard
View Answer
Explanation: None.
6. What will be the output of the following C code?
#include <stdio.h>typedef struct p
{int x, y;
};
int main()
{p k1 = {1, 2};
printf("%d\n", k1.x);
}
a) Compile time error
b) 1
c) 0
d) Depends on the standard
View Answer
Explanation: None.
7. What will be the output of the following C code?
#include <stdio.h>typedef struct p
{int x, y;
}k = {1, 2};
int main()
{p k1 = k;
printf("%d\n", k1.x);
}
a) Compile time error
b) 1
c) 0
d) Depends on the standard
View Answer
Explanation: None.
8. What will be the output of the following C code?
#include <stdio.h>typedef struct p
{int x, y;
}k;
int main()
{struct p p = {1, 2};
k k1 = p;
printf("%d\n", k1.x);
}
a) Compile time error
b) 1
c) 0
d) Depends on the standard
View Answer
Explanation: None.
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