Fello Software Developer Interview Questions and Answers

Permutations and combinations, time and work

Baesd on leetcode question varies from easy to difficult

Q1. Design Calculator
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Q2. React without react dom
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React without react dom involves using React's server-side rendering capabilities to render components without the need for a DOM.
• Use ReactDOMServer.renderToString() to render React components on the server side

• This can be useful for server-side rendering of React components for SEO purposes

• Example: ReactDOMServer.renderToString()
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Q1. Design Pagination
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Q2. Questions regarding NEXTjs
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Q1. General Discussion + 1 coding question
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Core HTML, CSS and JS

JS deep dive and react

Q1. Mimic Promise.all, Array.flat, OTP Component etc
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Q1. Online DSA round where question to be solved in front of interviewer and we need to pass all the cases. Question was based on frequency sort. This was to be done on HackerRank platform for which interviewe...read more
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Q2. Basic question based on internal working of hashmap, inter threads communication, Concurrent HashMap working and how it handles thread safety.
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Q1. Basic introduction and question asked based on my previous projects that i worked on. Few follow ups on the same.
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Q2. Was asked to design a ratelimiter service
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Q3. Question on synchronized keyword and it works internally. Threads and its inter communication.
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Q1. DSA round based on priority queue
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Q2. Asked about roles and responsibilities in prev company
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