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Senior Frontend Developer Interview Questions

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1,363 senior frontend developer interview questions shared by candidates

Round1:- Discussion around hooks and HOCs, caching etc Round 2: There was 1 interviewer and 6 people in a zoom call to be interviewed on the basis of an assignment where we were supposed to create a chrome extension which displays all the email ids scrapped from any weppage. The round was not briefed from before and came out by surprise.
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Senior Software Developer-Frontend

Interviewed at BrowserStack

3.9★
May 13, 2023

Round1:- Discussion around hooks and HOCs, caching etc Round 2: There was 1 interviewer and 6 people in a zoom call to be interviewed on the basis of an assignment where we were supposed to create a chrome extension which displays all the email ids scrapped from any weppage. The round was not briefed from before and came out by surprise.

First Interview: - What happens when we type a website address in URL bar? - Can you explain what you do as a frontend developer to a old person? (and also to me?) - Can you explain event loop? - What does React do? - Explain virtual DOM. Explain Reconciliation algorithm with an example. Second interview: - You have worked with APIs a lot! What do you think is important in designing an API? I cannot remember the rest of the questions.
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Senior Frontend Developer

Interviewed at FINN

4★
Mar 31, 2021

First Interview: - What happens when we type a website address in URL bar? - Can you explain what you do as a frontend developer to a old person? (and also to me?) - Can you explain event loop? - What does React do? - Explain virtual DOM. Explain Reconciliation algorithm with an example. Second interview: - You have worked with APIs a lot! What do you think is important in designing an API? I cannot remember the rest of the questions.

React.js, TypeScript, JavaScript, GraphQL - What is pureComponent ? - lifecycle methods - hooks - diff between useEffect & useLayoutEffect - portals - how do you make API calls - refs in React, when are they used ? - error handling - what is prop drilling ? - difference b/w createElement() & cloneElement - React Router Authentication & Authorization - how do you handle browser incompatibilities GraphQL: - what are benefits of using GraphQL - GraphQL queries & mutation - multiple queries in one request - REST API request methods GET, POST, PUT, PATCH, DELETE - error handling TypeScript - getter & setters - generics in TS - declare in TS, namespace - classes in TS - assert in TS
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Senior Frontend Developer-React JS

Interviewed at Firstsource Solutions

4.1★
Jul 25, 2023

React.js, TypeScript, JavaScript, GraphQL - What is pureComponent ? - lifecycle methods - hooks - diff between useEffect & useLayoutEffect - portals - how do you make API calls - refs in React, when are they used ? - error handling - what is prop drilling ? - difference b/w createElement() & cloneElement - React Router Authentication & Authorization - how do you handle browser incompatibilities GraphQL: - what are benefits of using GraphQL - GraphQL queries & mutation - multiple queries in one request - REST API request methods GET, POST, PUT, PATCH, DELETE - error handling TypeScript - getter & setters - generics in TS - declare in TS, namespace - classes in TS - assert in TS

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