Structure in C Language - Quiz

Q: What is the output of this C code?


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

A. newton alan alan
B. alan newton alan
C. alan alan newton
D. Compile time error

Correct Option: A
Remarks:

Explanation: None

Q: Which of the following is not possible under any scenario?

A. s1 = &s2;
B. s1 = s2;
C. (*s1).number = 10;
D. None of the mentioned

Correct Option: D
Remarks:

Explanation: None of the mentioned

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
Remarks:

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: Which operator connects the structure name to its member name?

B. <-
C. .
D. Both <- and .

Correct Option: C
Remarks:

Explanation: .

Q: Which of the following cannot be a structure member?

A. Another structure
B. Function
C. Array
D. None of the mentioned

Correct Option: B
Remarks:

Explanation: Function

Q: What is the output of this C code?


    #include <stdio.h>
    struct student
    {
        int no = 5;
        char name[20];
    };
    void main()
    {
        struct student s;
        s.no = 8;
        printf("hello");
    }

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

Correct Option: B
Remarks:

Explanation: Compile time error

Q: What is the output of this C code?


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

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

Correct Option: B
Remarks:

Explanation: Compile time error

Q: What is the output of this C code?


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

A. Compile time error
B. 10
C. Undefined behaviour
D. Segmentation fault

Correct Option: A
Remarks:

Explanation: Compile time error

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
Remarks:

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. Segmentation fault/code crash
C. 2
D. 1

Correct Option: A
Remarks:

Explanation: Compile time error

Structure in C Language - Quiz

Which of the following is not possible under any scenario?

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

Which operator connects the structure name to its member name?

Which of the following cannot be a structure member?

What is the output of this C code? #include <stdio.h> struct student { int no = 5; char name[20]; }; void main() { struct student s; s.no = 8; printf("hello"); }

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

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

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? #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?

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?