Structure in C Language - Quiz

Q: What is the output of this C code?


    #include <stdio.h>
    struct student
    {
        char *name;
    };
    struct student fun(void)
    {
        struct student s;
        s.name = "alan";
        return s;
    }
    void main()
    {
        struct student m = fun();
        printf("%s", m.name);
    }

A. Nothing
B. alan
C. Run time error
D. Varies

Correct Option: B
Explanation: alan

Q: Presence of code like “s.t.b = 10” indicate

A. Syntax Error
B. structure
C. double data type
D. An ordinary variable name

Correct Option: B
Explanation:

structure

The code "s.t.b = 10" suggests that there is a data structure or a variable named "s" which contains another data structure or variable named "t" which in turn contains a variable named "b". The code assigns the value 10 to the variable "b".

In C language, such a data structure or variable can be defined using a struct. Here is an example of how this code could be implemented in C:


struct t {
    int b;
};

struct s {
    struct t t;
};

int main() {
    struct s s;
    s.t.b = 10;
    return 0;
}

In this example, a struct "t" is defined which contains a single integer variable "b". Another struct "s" is defined which contains an instance of struct "t". In the main function, an instance of struct "s" is created and the value 10 is assigned to the variable "b" using the syntax "s.t.b = 10".

Q: What is the output of this C code?


    #include <stdio.h>
    struct
    {
        int k;
        char c;
    } p;
    int p = 10;
    int main()
    {
        p.k = 10;
        printf("%d %d\n", p.k, p);
    }

A. Compile time error
B. 10 10
C. Depends on the standard
D. Depends on the compiler

Correct Option: A
Explanation: Compile time error

Q: What is the output of this C code(according to C99 standard)?

 #include 
    struct p
    {
        int k;
        char c;
        float f;
    };
    int main()
    {
        struct p x = {.c = 97, .k = 1, 3};
        printf("%f \n", x.f);
    }

A. 3.000000
B. 0.000000
C. Compile time error
D. Undefined behaviour

Correct Option: B
Explanation: 0.000000

Q: What is the output of this C code?


    #include <stdio.h>
    void main()
    {
        struct student
        {
            int no;
            char name[20];
        };
        struct student s;
        s.no = 8;
        printf("%d", s.no);
    }

A. Nothing
B. Compile time error
C. Junk
D. 8

Correct Option: D
Explanation: 8

Q: What is the output of this C code?


    #include <stdio.h>
    struct point
    {
        int x;
        int y;
    };
    int main()
    {
        struct point p = {1};
        struct point p1 = {1};
        if(p == p1)
            printf("equal\n");
        else
            printf("not equal\n");
    }

A. Compile time error
B. equal
C. depends on the standard
D. not equal

Correct Option: A
Explanation: Compile time error

Q: What is the output of this C code?


    #include <stdio.h>
    struct point
    {
        int x;
        int y;
    };
    void foo(struct point*);
    int main()
    {
        struct point p1 = {1, 2};
        foo(&p1);
    }
    void foo(struct point *p)
    {
        printf("%d\n", *p->x++);
    }

A. Compile time error
B. 1
C. Segmentation fault/code crash

Correct Option: A
Explanation: Compile time error

Q: What is the output of this C code?


    #include <stdio.h>
    struct student
    {
        int no;
        char name[20];
    };
    void main()
    {
        student s;
        s.no = 8;
        printf("hello");
    }

A. Nothing
B. hello
C. Compile time error
D. Varies

Correct Option: C
Explanation: Compile time error

Q: What is the output of this C code?


    #include <stdio.h>
    struct student
    {
        char *name;
    };
    void main()
    {
        struct student s, m;
        s.name = "st";
        m = s;
        printf("%s%s", s.name, m.name);
    }

A. Compile time error
B. Nothing
C. Junk values
D. st st

Correct Option: D
Explanation: None

Q: Can the above code be compiled successfully?


    #include <stdio.h>
    struct p
    {
        int k;
        char c;
        float f;
    };
    int main()
    {
        struct p x = {.c = 97, .f = 3, .k = 1};
        printf("%f\n", x.f);
    }

A. Yes
B. No
C. Depends on the standard
D. Depends on the platform

Correct Option: C
Explanation: Depends on the standard

Structure in C Language - Quiz

What is the output of this C code? #include <stdio.h> struct student { char *name; }; struct student fun(void) { struct student s; s.name = "alan"; return s; } void main() { struct student m = fun(); printf("%s", m.name); }

Presence of code like “s.t.b = 10” indicate

What is the output of this C code? #include <stdio.h> struct { int k; char c; } p; int p = 10; int main() { p.k = 10; printf("%d %d\n", p.k, p); }

What is the output of this C code(according to C99 standard)? #include struct p { int k; char c; float f; }; int main() { struct p x = {.c = 97, .k = 1, 3}; printf("%f \n", x.f); }

What is the output of this C code? #include <stdio.h> void main() { struct student { int no; char name[20]; }; struct student s; s.no = 8; printf("%d", s.no); }

What is the output of this C code? #include <stdio.h> struct point { int x; int y; }; int main() { struct point p = {1}; struct point p1 = {1}; if(p == p1) printf("equal\n"); else printf("not equal\n"); }

What is the output of this C code? #include <stdio.h> struct point { int x; int y; }; void foo(struct point*); int main() { struct point p1 = {1, 2}; foo(&p1); } void foo(struct point *p) { printf("%d\n", *p->x++); }

What is the output of this C code? #include <stdio.h> struct student { int no; char name[20]; }; void main() { student s; s.no = 8; printf("hello"); }

What is the output of this C code? #include <stdio.h> struct student { char *name; }; void main() { struct student s, m; s.name = "st"; m = s; printf("%s%s", s.name, m.name); }

Can the above code be compiled successfully? #include <stdio.h> struct p { int k; char c; float f; }; int main() { struct p x = {.c = 97, .f = 3, .k = 1}; printf("%f\n", x.f); }

What is the output of this C code?

What is the output of this C code?

What is the output of this C code(according to C99 standard)?
#include struct p { int k; char c; float f; }; int main() { struct p x = {.c = 97, .k = 1, 3}; printf("%f \n", x.f); }

What is the output of this C code?

What is the output of this C code?

What is the output of this C code?

What is the output of this C code?

What is the output of this C code?

Can the above code be compiled successfully?