Hackerearth

Role: Frontend Developer / Software Engineer

College: Not Specified

Interview Date: Not Specified

Interview Type: Full-Time

Result: Selected

Difficulty: Not Specified

Rounds: 5 rounds (Coding Hackerearth Test, Skype Online Interview, Skype Video Interview, Managerial Round, Co-Founder Round)

Topics Asked: React, Redux, Node.js, HTML rendering, SPA flow, ``, `async` vs `defer` in script tags, CSS, HTTP headers, `sessionStorage`, `localStorage`, `cookies`, webpage loading architecture, Virtual DOM, React Component lifecycle, React vs Angular, Event loop, `setTimeout`, Promises, OOPs, testing, open source contribution, projects, communication, leadership qualities

Experience:

This candidate was selected for a Software Engineer role after a comprehensive interview process that included 5 rounds.

Round 1: Coding HackerEarth Test

This was a 4-hour coding round where the candidate was tasked with developing an E-Commerce cart application using React, Redux, and Node.js. The candidate submitted their solution and was selected for the next rounds.

Round 2: Skype Online Interview

The interview began with self-introduction, followed by the interviewer explaining the company and the role. Questions asked included:

• How HTML is rendered in a browser.
• The flow when running a single-page web application (SPA).
• Why `` is used and what happens if it's not included.
• Difference between `async` and `defer` in script tags.
• Some CSS questions.

Round 3: Skype Video Interview

This round also started with an introduction. Questions covered:

• Importance of HTTP headers.
• Difference between `sessionStorage`, `localStorage`, and `cookies`.
• How a webpage loads and its architecture/flow.
• How Virtual DOM works in React.
• What Shadow DOM is in HTML5.
• React Component lifecycle.
• Difference between React and Angular, and which is better.
• Event loop and how `setTimeout` works.
• Promises chaining and how callbacks differ from promises.
• Explanation of a proud development project.

This round lasted almost 2 hours and went well. The candidate received a call from HR the same evening, confirming they cleared the first two rounds and were invited for further rounds in Bangalore, with flight tickets booked by the company.

Round 4: Managerial Round (Engineering Manager)

This round was not heavily technical. The manager tested domain knowledge and skillset. It involved a friendly conversation about previous company experience, testing experience, and open-source contributions mentioned in the resume.

Round 5: Last round with Co-Founder

The co-founder was described as friendly. This round involved normal HR-related questions to assess communication and leadership qualities.

The candidate received a selection email the next day.