EasyPhone Screen
2
234
What is the difference between == and === in JavaScript?
Explain the difference between loose equality (==) and strict equality (===) operators in JavaScript. When would you use one over the other?
Google
Software Engineer
Node.js Interview Questions
Node.js interview questions covering event loop, async patterns, Express/Fastify, package management, and server-side JavaScript.
Related:backend
9
Questions in database
Questions (9)
EasyPhone Screen
2
312
What are closures in JavaScript?
Explain what closures are in JavaScript. Provide an example of when you would use a closure and explain how it works.
Meta
Frontend Engineer
MediumTechnical
2
267
Implement a debounce function
Write a debounce function that delays invoking a function until after a specified wait time has elapsed since the last time it was invoked.
Apple
Senior Software Engineer
MediumTechnical
1
178
Explain event loop in Node.js
How does the event loop work in Node.js? Explain the different phases and how async operations are handled.
Amazon
Backend Engineer
EasyPhone Screen
1
189
What is the difference between var, let, and const?
Explain the differences between var, let, and const in JavaScript. When would you use each one?
Amazon
Software Development Engineer
MediumTechnical
1
178
Implement a deep clone function in JavaScript
Write a function that creates a deep copy of a JavaScript object. Handle nested objects, arrays, and edge cases like circular references.
Netflix
Senior UI Engineer
EasyPhone Screen
1
156
What is the difference between Promise.all and Promise.allSettled?
Explain the difference between Promise.all() and Promise.allSettled() in JavaScript. When would you use each?
Apple
Frontend Developer
MediumTechnical
1
198
Implement throttle function
Write a throttle function that limits the rate at which a function can be called. It should invoke the function at most once per specified time period.
Netflix
Frontend Engineer
MediumTechnical
1
256
Implement Promise.all from scratch
Implement Promise.all in JavaScript without using the built-in method. Handle success and failure cases correctly.
Meta
Software Engineer