10 Interview Questions
Every JavaScript Developer Should Know

AKA: The Keys to JavaScript Mastery

Eric Elliott
Oct 2, 2015 · 13 min read

Update: 2020

Original Article Starts Here

It Starts With People

“People, Process, Product”

The best way to evaluate a candidate
is a pair programming exercise.

1. Can you name two programming paradigms important for JavaScript app developers?

2. What is functional programming?

3. What is the difference between classical inheritance and prototypal inheritance?

In JavaScript, prototypal inheritance is simpler &
more flexible than class inheritance.

4. What are the pros and cons of functional programming vs object-oriented programming?

5. When is classical inheritance an appropriate choice?

6. When is prototypal inheritance an appropriate choice?

7. What does “favor object composition over class inheritance” mean?

8. What are two-way data binding and one-way data flow, and how are they different?

9. What are the pros and cons of monolithic vs microservice architectures?

10. What is asynchronous programming, and why is it important in JavaScript?


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