Dassault

Role: React Developer

College: Not Specified

Interview Date: Not Specified (experience published 2025-06-04)

Interview Type: Not Specified (Experienced Hire - 3.5+ years frontend experience)

Result: Rejected (Position filled before offer could be rolled out)

Difficulty: Easy to Moderate

Rounds: 2 rounds

Topics Asked: React concepts (lifecycle methods, hooks, state management, Context API, Virtual DOM, API calls, performance optimization), JavaScript fundamentals (closures, event loop, promises, async/await), HTML, CSS, Data Structures (stack-based searching), puzzle-style coding problems

Experience:

The candidate interviewed for a React Developer role with over 3.5 years of frontend experience. The interview process went well, but the position was filled before an offer could be extended.

Round 1: The Online Assessment
Duration: 50 minutes. This round was a mix of multiple-choice questions and coding challenges.

• MCQs: Covered core React concepts like lifecycle methods, React hooks, and state management. There was a strong focus on JavaScript fundamentals, including closures, the event loop, promises, and async/await. A few HTML and CSS topics, such as semantic tags and pseudo-elements, also appeared.
• Coding Problems (3): The first problem involved a searching task that required understanding looping with a stack (LIFO approach). The other two were puzzle-style problems resembling a pinball game, one relatively easy and the other ranging from easy to medium difficulty. Solving them involved concepts like event handling and `setTimeout` to simulate delays.

Round 2: The Technical Interview
Duration: 40-45 minutes. This was a live coding and discussion session. The interviewer focused on real-world frontend scenarios.

• Discussion began around React hooks and the Context API, particularly how they help eliminate prop-drilling.
• The conversation flowed into topics like the Virtual DOM and best practices for handling API calls using Axios.
• Performance optimization was also touched upon.

Outcome: The candidate "nailed the interview" but did not get the offer because "the position got filled before they could roll it out."
Learnings: Learned to explain concepts under pressure, gained insight into expectations for mid-level React developers, and identified areas for skill improvement like async flows and performance tuning.