TypeScript Interview Playbook

TypeScript is a powerful superset of JavaScript that introduces static typing and modern features to streamline development. It helps catch errors during the compile time, enhances code maintainability, and boosts developer productivity. Whether you're building small applications or large-scale systems, mastering TypeScript can make your code more robust and scalable.

This workbook features an extensive collection of TypeScript questions and answers designed to clarify concepts and prepare you for technical interviews. With questions spanning a range of difficulty—from basic fundamentals to advanced topics—it's tailored to suit beginners, intermediates, and seasoned professionals alike.

This guide will benefit:

• A beginner who has never faced a TypeScript interview

• Anyone who wants an accessible introduction to TypeScript

• Professionals seeking detailed answers with examples and explanations

• Those unsure about what exactly interviewers are looking for…

How should you read this book?

Begin by reading through all the questions at a comfortable pace. On your first pass, note the questions you find challenging. In subsequent readings, focus on these tougher areas to build a deeper understanding. Repeating this process 2-3 times will boost your confidence and prepare you to tackle a technical interview for a TypeScript-focused position.

What are some sample questions in this book?

1. What is TypeScript, and why should developers choose it over plain JavaScript?


2. What are the key differences between TypeScript and JavaScript?


3. How does static typing in TypeScript help in catching errors early?


4. Can you describe the process of setting up a basic TypeScript project?


5. What are type annotations, and why are they important in TypeScript?


6. How do generics improve code reusability in TypeScript?


7. How do you define and implement an interface in TypeScript?


8. What is the purpose of type guards, and how do they work?


9. Explain union and intersection types with examples.


10. How do you integrate external JavaScript libraries into a TypeScript project?

Prepare to dive into these questions and more, and you'll be well-equipped for any TypeScript interview challenge that comes your way.