The ultimate guide to recursion interviews with strategies developed by FAANG engineers. Practice with real-world interview questions, detailed explanations, and visualizations to prep faster.

If you’ve got an interview coming up and want to brush up on your knowledge, or if you’ve ever struggled with solving coding problems using recursion, you'll find this course helpful.
 
You’ll start with the basics of what recursion is and why it’s important before diving into what it looks like in practice. You’ll see how recursion can help you solve a variety of different math, string, and data structure problems by using interactive code playgrounds that you can execute directly in your browser. You’ll have access to detailed explanations and visualizations for each problem to help you along the way.  
 
By the time you’re done, you’ll be able to use what you’ve learned to solve complex real-world problems and even advance more easily through your interviews at top tech companies.

Recursion for Coding Interviews in Java

Recursion is similar to which of the following?

Recursion is similar to which of the following?

Recursion uses less memory as compared to iteration

Iteration is always better and simpler than recursion


Recursion uses more memory compared to iteration


Recursion is always better than iteration


Which of the following statements is true?

Which of the following statements is true?

In recursion, the condition in which the function will stop calling itself is _______.

In recursion, the condition in which the function will stop calling itself is _______.

The following problem(s) can be solved using recursion

The following problem(s) can be solved using recursion

What will be the output for the code given below?
```Java
private static void recursive_function(int num)
{
    if (num == 0) {
    	return;
    }
    System.out.print(num, " ");
    recursive_function(num-1);
}

public static void main(String args[])
{
    recursive_function(5);
}

What will be the output for the code given below?
<pre><code class="language-Java">private static void recursive_function(int num)
{
 if (num == 0) {
 	return;
 }
 System.out.print(num, &quot; &quot;);
 recursive_function(num-1);
}

public static void main(String args[])
{
 recursive_function(5);
}</code></pre>

What is the base case for the code given below?
```Java
private static void recursive_function(int num)
{
    if (num == 0) {
    	return;
    }
    System.out.print(num, " ");
    recursive_function(num-1);
}

public static void main(String args[])
{
    recursive_function(5);
}

What is the base case for the code given below?
<pre><code class="language-Java">private static void recursive_function(int num)
{
 if (num == 0) {
 	return;
 }
 System.out.print(num, &quot; &quot;);
 recursive_function(num-1);
}

public static void main(String args[])
{
 recursive_function(5);
}</code></pre>

How many times is the recursive method called when the code given below is executed?
```Java
private static void recursive_function(int num)
{
    if (num == 0) {
    	return;
    }
    System.out.print(num, " ");
    recursive_function(num-1);
}

public static void main(String args[])
{
    recursive_function(5);
}

How many times is the recursive method called when the code given below is executed?
<pre><code class="language-Java">private static void recursive_function(int num)
{
 if (num == 0) {
 	return;
 }
 System.out.print(num, &quot; &quot;);
 recursive_function(num-1);
}

public static void main(String args[])
{
 recursive_function(5);
}</code></pre>

This lesson will test your knowledge regarding Iteration to Recursion.

Fundamentals of Recursion

Iteration to Recursion

Recursion with Numbers

Recursion with Strings

Recursion with Arrays

Recursion with Data Structures

Quick Quiz on Iteration!