JavaScript Interview Mastery 2026 – Modern Roles Q&A
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JavaScript Interview Mastery 2026 – Modern Roles Q&A
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Recommended experience
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What you'll learn
Solve JavaScript interview problems, including Fibonacci, palindrome, and anagram tasks.
Understand asynchronous JavaScript concepts like callbacks, promises, and async/await.
Perform object comparisons and create memoization functions to optimize performance.
Work with JavaScript to manipulate arrays, objects, and the DOM for real-world projects.
Details to know
May 2026
7 assignments
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There are 7 modules in this course
This course features Coursera Coach! A smarter way to learn with interactive, real-time conversations that help you test your knowledge, challenge assumptions, and deepen your understanding as you progress through the course.
In this course, you'll master essential JavaScript concepts and prepare for coding interviews by tackling real-world problems and challenges. From understanding core JavaScript concepts like closures and hoisting to advanced techniques like currying and memoization, this course takes you on a comprehensive journey through the language. You'll also learn to handle asynchronous JavaScript with callbacks, promises, and async/await, equipping you with the skills to write efficient, clean code under pressure. The course structure emphasizes practical exercises and tasks frequently asked in JavaScript interviews, from writing efficient functions to performing deep object comparisons. As you progress, you'll also be introduced to more complex topics like working with the DOM, manipulating arrays, and managing events. You'll get a solid understanding of interview-specific tasks such as implementing the Fibonacci sequence, palindrome checks, and working with nested data structures. This course is ideal for developers preparing for JavaScript interviews and those looking to solidify their JavaScript knowledge. Basic knowledge of JavaScript is required, and a keen interest in hands-on problem-solving will help you excel. The difficulty level is intermediate, offering challenges that require both theoretical knowledge and practical coding experience. By the end of the course, you will be able to efficiently solve common interview problems, handle asynchronous tasks, and apply JavaScript concepts to real-world coding challenges.
In this module, we will cover foundational JavaScript concepts essential for acing interviews. You’ll dive into common operations like array manipulation, closures, and the “this” keyword. Additionally, we will guide you through practical exercises to enhance your problem-solving abilities for interview scenarios.
What's included
26 videos1 reading
26 videos•Total 112 minutes
- Introduction•1 minute
- Types of Interviews•2 minutes
- Interview and Work Are Completely Different Things•1 minute
- PDF File•1 minute
- I Prepared Source Code for You•0 minutes
- Mapping Users to Get Usernames•10 minutes
- Difference Between Null and Undefined•3 minutes
- Hoisting•5 minutes
- Closures•6 minutes
- Currying•13 minutes
- Adding Elements to the Array•4 minutes
- Concatenating Arrays•3 minutes
- Check if User With Such Name Exists•4 minutes
- Remove All Duplicates in the Array•4 minutes
- Sorting the Array•4 minutes
- Interview Is Not What You Think•2 minutes
- Writing Range Function•3 minutes
- Writing Shuffle Function•3 minutes
- Find the Number of Occurrences of Minimum Value in List•3 minutes
- This•6 minutes
- Classes•5 minutes
- Prototypes•7 minutes
- I've Failed Interview. What's Next?•2 minutes
- Modules•10 minutes
- Implement Debounce Function•6 minutes
- Implement Throttle Function•4 minutes
1 reading•Total 10 minutes
- Full Course Resource•10 minutes
In this module, we will explore how to interact with the DOM using JavaScript. You will learn to highlight text, add links dynamically, and handle events efficiently with event delegation. These skills are essential for solving real-world JavaScript problems in interview settings.
What's included
4 videos1 assignment
4 videos•Total 14 minutes
- Highlight All Words Over 8 Chars With Yellow•4 minutes
- Add a Link•2 minutes
- Split Each Sentence to a Separate Line•4 minutes
- Event Delegation•4 minutes
1 assignment•Total 15 minutes
- Working with DOM - Assessment•15 minutes
In this module, we will focus on asynchronous programming, a key skill in modern JavaScript. You will explore the XMLHttpRequest and Fetch API, learn about callbacks, promises, and async/await, and understand how to optimize your asynchronous code for real-world projects and interviews.
What's included
9 videos1 assignment
9 videos•Total 35 minutes
- XML HTTP Request•3 minutes
- Fetch API•2 minutes
- Basic Callback•3 minutes
- Parallel Async Array•6 minutes
- Convert Callback to Promise•3 minutes
- Map Data in Promises•7 minutes
- Rewrite Mapping Data in Async Await•3 minutes
- You Must Use Correct Vocabulary•1 minute
- Design Request Manager•7 minutes
1 assignment•Total 15 minutes
- Asynchronous JavaScript - Assessment•15 minutes
In this module, we will teach you how to write comparison functions in JavaScript, focusing on both shallow and deep comparisons. Additionally, you will learn how to create a memoization function to improve efficiency in solving repetitive problems, a crucial technique for interview challenges.
What's included
3 videos1 assignment
3 videos•Total 15 minutes
- Implement Shallow Comparison•8 minutes
- Implement Deep Comparison•3 minutes
- Create Memoization Function•4 minutes
1 assignment•Total 15 minutes
- Comparison Functions - Assessment•15 minutes
In this module, we will tackle common JavaScript interview questions. You’ll learn how to implement classic algorithms like Fibonacci, palindrome checks, and anagram identification, preparing you for the most frequently asked coding challenges in interviews.
What's included
4 videos1 assignment
4 videos•Total 11 minutes
- Fibonacci•3 minutes
- Palindrome•1 minute
- Anagram•4 minutes
- Finding Vowels•3 minutes
1 assignment•Total 15 minutes
- Tasks Asked Only on Interview - Assessment•15 minutes
In this module, we will cover practical JavaScript tasks you’ll encounter in real-world applications. You will gain hands-on experience in data manipulation, time conversion, URL parameter replacement, and form validation, ensuring that you are well-equipped for both job tasks and interviews.
What's included
6 videos1 assignment
6 videos•Total 38 minutes
- Convert to Title Case•6 minutes
- Convert the Time Input Given in 12 Hours Format to 24•8 minutes
- Mapping Data•5 minutes
- Replace Parameters in URL•5 minutes
- Validation Messages•5 minutes
- Nested List•10 minutes
1 assignment•Total 15 minutes
- Tasks From Everyday Work - Assessment•15 minutes
In this module, we will assign practical exercises to help you solidify your JavaScript skills. This will prepare you for real-world interviews, giving you the confidence to tackle any JavaScript challenge that comes your way.
What's included
1 video2 assignments
1 video•Total 1 minute
- Homework•1 minute
2 assignments•Total 75 minutes
- Full Course Practice Assessment•15 minutes
- Full Course Assessment•60 minutes
Instructor
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Frequently asked questions
JavaScript is a dynamic programming language used for building interactive and dynamic websites. It enables web developers to create features like form validations, interactive maps, and animations. It is one of the most widely-used languages in modern web development, making it crucial for developers to master for both technical roles and interviews in the industry.
This workshop is designed to prepare you for JavaScript technical interviews by covering a wide range of JavaScript topics. From core concepts like closures and hoisting to more advanced topics like asynchronous programming and design patterns, the workshop includes practical problem-solving exercises to help you ace JavaScript interviews and understand how to apply these skills in real-world scenarios.
After completing this workshop, you will be equipped with a solid understanding of JavaScript, both for interviews and real-world applications. You will be able to solve common JavaScript interview questions, such as working with arrays, manipulating the DOM, and handling asynchronous tasks. You will also gain knowledge of optimizing code and implementing advanced techniques like memoization, deep comparison, and event delegation.
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