Master the JavaScript interview with expertly curated questions and solutions. Strategies developed by FAANG engineers help you prep faster, boost confidence, and refine your problem-solving skills.

Master the JavaScript interview by practicing 20 carefully curated interview questions and solutions. These problems will provide the tools you need to tackle any question you find in an interview. Allow ~1 hour per question.

Most questions have multiple solutions presented. All solutions are thoroughly explained and time and space complexity are discussed. A passing familiarity with these ideas is expected. You'll learn how to tackle different types of problems so you can proceed with confidence in your interviews.

These questions go beyond the common problems that we've all seen. FizzBuzz and bubble sort? We start past those.

We'll discuss how to refine algorithms. We'll go over clever, advanced ways of manipulating data that interviewers are looking for. You'll walk away more skilled and confident in your problem solving and interviewing abilities.

This course is taught in ES2015.

Master the JavaScript Interview

# String Rotation

### Instructions

Create a function that takes in 2 strings as parameters.

Return `true` if the strings are rotations of each other. Otherwise, return `false`.

**Input**: String, String

**Output**: Boolean

### Examples

The following sets of strings are rotations:

    "rotation"  "tationro" "tionrota"

    "javascript"  "scriptjava"  "iptjavascr"

    "RotateMe"  "teMeRota"  "eRotateM"

### Hints

- You may have to spend time thinking about how best to arrange these strings before processing in a loop.
- Think about ways to short-circuit the check.

---

# String Rotation

## Instructions

Create a function that takes in 2 strings as parameters.

Return `true` if the strings are rotations of each other. Otherwise, return `false`.

**Input**: String, String

**Output**: Boolean

## Examples

The following sets of strings are rotations:

    "rotation"  "tationro" "tionrota"

    "javascript"  "scriptjava"  "iptjavascr"

    "RotateMe"  "teMeRota"  "eRotateM"

## Hints

- You may have to spend time thinking about how best to arrange these strings before processing in a loop.
- Think about ways to short-circuit the check.

---

We'll discuss how to determine if two strings are rotations of one another. We'll go over a brute-force solution and an elegant solution.

Introduction

Strings & Arrays

Advanced Strings & Arrays

Algorithms & Data Structures

JavaScript Mastery

Conclusion

String Rotation

String Rotation

Instructions

Examples

Hints