C Structures & Functions Questions and Answers

This set of C Multiple Choice Questions & Answers (MCQs) focuses on “Structures and Functions – 1”.

Pre-requisite for this C MCQ set: Advanced C Programming Video Tutorial.

1. What will be the output of the following 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
View Answer

Answer: a
Explanation: None.

2. What will be the output of the following C code?

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```
    #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
View Answer

Answer: d
Explanation: None.

3. Which of the following return-type cannot be used for a function in C?
a) char *
b) struct
c) void
d) none of the mentioned
View Answer

Answer: d
Explanation: None.

4. What will be the output of the following C code?

```
    #include <stdio.h>
```
```
    struct temp
```
```
    {
```
```
        int a;
```
```
    } s;
```
```
    void func(struct temp s)
```
```
    {
```
```
        s.a = 10;
```
```
        printf("%d\t", s.a);
```
```
    }
```
```
    main()
```
```
    {
```
```
        func(s);
```
```
        printf("%d\t", s.a);
```
```
    }
```

a) 10 (Garbage Value)
b) 0 10
c) 10 0
d) (Garbage Value) 10
View Answer

Answer: c
Explanation: None.

5. 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
View Answer

Answer: d
Explanation: None.

6. Which of the following operation is illegal in structures?
a) Typecasting of structure
b) Pointer to a variable of the same structure
c) Dynamic allocation of memory for structure
d) All of the mentioned
View Answer

Answer: a
Explanation: None.

7. Presence of code like “s.t.b = 10” indicates __________
a) Syntax Error
b) Structure
c) double data type
d) An ordinary variable name
View Answer

Answer: b
Explanation: None.

8. What will be the output of the following 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();
```
```
        s.name = "turing";
```
```
        printf("%s", m.name);
```
```
    }
```

a) alan
b) Turing
c) Compile time error
d) Nothing
View Answer

Answer: c
Explanation: None.

Sanfoundry Global Education & Learning Series – C Programming Language.

To practice all areas of C language, here is complete set of 1000+ Multiple Choice Questions and Answers.

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