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

C language Objective Questions on “For Loops”. One shall practice these Objective Questions to improve their C programming skills needed for various interviews (campus interviews, walkin interviews, company interviews), placements, entrance exams and other competitive exams. These questions can be attempted by anyone focusing on learning C Programming language. They can be a beginner, fresher, engineering graduate or an experienced IT professional. Our C language Objective Questions come with detailed explanation of the answers which helps in better understanding of C concepts.

Here is a listing of C language Objective Questions on “For Loops” along with answers, explanations and/or solutions:

1. The C code ‘for(;;)’ represents an infinite loop. It can be terminated by ___________
a) break
b) exit(0)
c) abort()
d) terminate
Answer: a
Clarification: None.

2. What will be the correct syntax for running two variable for loop simultaneously?
a)

   for (i = 0; i < n; i++)
   for (j = 0; j < n; j += 5)

for (i = 0, j = 0; i < n, j < n; i++, j += 5)

   for (i = 0; i < n;i++){}
   for (j = 0; j < n;j += 5){}

d) none of the mentioned
Answer: b
Clarification: None.

3. Which for loop has range of similar indexes of ‘i’ used in for (i = 0;i < n; i++)?
a) for (i = n; i>0; i–)
b) for (i = n; i >= 0; i–)
c) for (i = n-1; i>0; i–)
d) for (i = n-1; i>-1; i–)
Answer: d
Clarification: None.

4. Which of the following cannot be used as LHS of the expression in for (exp1;exp2; exp3)?
a) variable
b) function
c) typedef
d) macros
Answer: d
Clarification: None.

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

```
    #include 
```
```
    int main()
```
```
    {
```
```
        short i;
```
```
        for (i = 1; i >= 0; i++)
```
```
            printf("%dn", i);
```
```
 
```
```
    }
```

a) The control won’t fall into the for loop
b) Numbers will be displayed until the signed limit of short and throw a runtime error
c) Numbers will be displayed until the signed limit of short and program will successfully terminate
d) This program will get into an infinite loop and keep printing numbers with no errors
Answer: c
Clarification: None.

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

```
    #include 
```
```
    void main()
```
```
    {
```
```
        int k = 0;
```
```
        for (k)
```
```
            printf("Hello");
```
```
    }
```

a) Compile time error
b) hello
c) Nothing
d) Varies
Answer: a
Clarification: None.

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

```
    #include 
```
```
    void main()
```
```
    {
```
```
        int k = 0;
```
```
        for (k < 3; k++)
```
```
        printf("Hello");
```
```
    }
```

a) Compile time error
b) Hello is printed thrice
c) Nothing
d) Varies
Answer: a
Clarification: None.

8. 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("Hello");
```
```
    }
```

a) Run time error
b) Hello is printed thrice
c) Hello is printed twice
d) Hello is printed infinitely
Answer: b
Clarification: None.

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