250+ TOP MCQs on For Loops and Answers [2024]

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

Here is a listing of online C test questions on “For Loops” along with answers, explanations and/or solutions:

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

```
    #include 
```
```
    void main()
```
```
    {
```
```
        double k = 0;
```
```
        for (k = 0.0; k < 3.0; k++);
```
```
            printf("%lf", k);
```
```
    }
```

a) 2.000000
b) 4.000000
c) 3.000000
d) Run time error
Answer: c
Clarification: None.

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

```
    #include 
```
```
    void main()
```
```
    {
```
```
        int k;
```
```
        for (k = -3; k < -5; k++)
```
```
            printf("Hello");
```
```
    }
```

a) Hello
b) Infinite hello
c) Run time error
d) Nothing
Answer: d
Clarification: None.

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

```
    #include 
```
```
    int main()
```
```
    {
```
```
        int i = 0;
```
```
        for (; ; ;)
```
```
            printf("In for loopn");
```
```
            printf("After loopn");
```
```
    }
```

a) Compile time error
b) Infinite loop
c) After loop
d) Undefined behaviour
Answer: a
Clarification: None.

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

```
    #include 
```
```
    int main()
```
```
    {
```
```
        int i = 0;
```
```
        for (i++; i == 1; i = 2)
```
```
            printf("In for loop ");
```
```
            printf("After loopn");
```
```
    }
```

a) In for loop after loop
b) After loop
c) Compile time error
d) Undefined behaviour
Answer: a
Clarification: None.

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

```
    #include 
```
```
    int main()
```
```
    {
```
```
        int i = 0;
```
```
        for (foo(); i == 1; i = 2)
```
```
            printf("In for loopn");
```
```
            printf("After loopn");
```
```
    }
```
```
    int foo()
```
```
    {
```
```
        return 1;
```
```
    }
```

a) After loop
b) In for loop after loop
c) Compile time error
d) Infinite loop
Answer: a
Clarification: None.

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

```
    #include 
```
```
    int main()
```
```
    {
```
```
        int *p = NULL;
```
```
        for (foo(); p; p = 0)
```
```
            printf("In for loopn");
```
```
            printf("After loopn");
```
```
    }
```

a) In for loop after loop
b) Compile time error
c) Infinite loop
d) Depends on the value of NULL
Answer: b
Clarification: None.

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

```
    #include 
```
```
    int main()
```
```
    {
```
```
        for (int i = 0;i < 1; i++)
```
```
            printf("In for loopn");
```
```
    }
```

a) Compile time error
b) In for loop
c) Depends on the standard compiler implements
d) Depends on the compiler
Answer: c
Clarification: None.

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