250+ TOP MCQs on Character Pointers and Functions and Answers [2024]

C helps anyone preparing for Netapp and other companies C interviews. One should practice these Objective Questions and answers continuously for 2-3 months to clear Netapp interviews on C Programming language.

Here is a listing of C Objective Questions on “Character Pointers and Functions” along with answers, explanations and/or solutions:

1. Comment on the output of the following C code.

```
    #include 
```
```
    int main()
```
```
    {
```
```
        char *str = "This" //Line 1
```

        char *ptr = "Programn"; //Line 2

```
        str = ptr; //Line 3
```

        printf("%s, %sn", str, ptr); //Line 4

```
    }
```

a) Memory holding “this” is cleared at line 3
b) Memory holding “this” loses its reference at line 3
c) You cannot assign pointer like in Line 3
d) Output will be This, Program
Answer: b
Clarification: None.

2. What type of initialization is needed for the segment “ptr[3] = ‘3’;” to work?
a) char *ptr = “Hello!”;
b) char ptr[] = “Hello!”;
c) both char *ptr = “Hello!”; and char ptr[] = “Hello!”;
d) none of the mentioned
Answer: b
Clarification: None.

3. What is the syntax for constant pointer to address (i.e., fixed pointer address)?
a) const *
b) * const
c) const *
d) none of the mentioned
Answer: b
Clarification: None.

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

```
    #include 
```
```
    int add(int a, int b)
```
```
    {
```
```
        return a + b;
```
```
    }
```
```
    int main()
```
```
    {
```
```
        int (*fn_ptr)(int, int);
```
```
        fn_ptr = add;
```

        printf("The sum of two numbers is: %d", (int)fn_ptr(2, 3));

```
    }
```

a) Compile time error, declaration of a function inside main
b) Compile time error, no definition of function fn_ptr
c) Compile time error, illegal application of statement fn_ptr = add
d) No Run time error, output is 5
Answer: d
Clarification: None.

5. What is the correct way to declare and assign a function pointer?

(Assuming the function to be assigned is "int multi(int, int);")

a) int (*fn_ptr)(int, int) = multi;
b) int *fn_ptr(int, int) = multi;
c) int *fn_ptr(int, int) = &multi;
d) none of the mentioned
Answer: a
Clarification: None.

6. Calling a function f with a an array variable a[3] where a is an array, is equivalent to __________
a) f(a[3])
b) f(*(a + 3))
c) f(3[a])
d) all of the mentioned
Answer: d
Clarification: None.

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

```
    #include 
```
```
    void f(char *k)
```
```
    {
```
```
        k++;
```
```
        k[2] = 'm';
```
```
    }
```
```
    void main()
```
```
    {
```
```
        char s[] = "hello";
```
```
        f(s);
```
```
        printf("%cn", *s);
```
```
    }
```

a) h
b) e
c) m
d) o;
Answer: a
Clarification: None.

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

```
    #include 
```
```
    void main()
```
```
    {
```
```
        char s[] = "hello";
```
```
        s++;
```
```
        printf("%cn", *s);
```
```
    }
```

a) Compile time error
b) h
c) e
d) o
Answer: a
Clarification: None.

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