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      Gray Matrix Solutions

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      Software Developer Interview

      25 Dec 2024
      Anonymous interview candidate
      Mumbai
      No offer
      Positive experience
      Average interview

      Application

      I interviewed at Gray Matrix Solutions (Mumbai)

      Interview

      It was a technical round , and focused most on Basics and core part of js nodejs and react Closures , promises , async programing , basics of js , pure component , useMemo , useCallBack , etc

      Interview questions [1]

      Question 1

      Closures , promises , async programing , basics of js , pure component , useMemo , useCallBack , etc
      Answer question

      Other Software Developer interview reviews for Gray Matrix Solutions

      Software Engineer Interview

      1 Jul 2025
      Anonymous employee
      Mumbai
      Accepted offer
      Positive experience
      Average interview

      Application

      I applied through a recruiter. The process took 1+ week. I interviewed at Gray Matrix Solutions (Mumbai) in Apr 2023

      Interview

      The interview process for a Software Development Engineer (SDE) role typically begins with resume screening, where a recruiter or hiring manager reviews the candidate’s technical background, programming skills, and relevant project experience. If the candidate meets the initial criteria, they are invited to a recruiter phone screen lasting around 30 minutes. This conversation focuses on understanding the candidate’s interest in the role, salary expectations, availability, and overall fit with the company. Candidates who pass the phone screen move on to a technical assessment, which usually involves a 45–60 minute online coding session. This may be conducted using platforms like HackerRank, CoderPad, or a shared IDE, and focuses on evaluating data structures, algorithms, problem-solving ability, and code quality. Successful candidates are then invited to a virtual onsite or final round, which typically consists of 2 to 4 interviews over approximately three hours. These rounds include a deep dive into coding challenges, a system design interview (for mid- to senior-level roles), a behavioral interview to assess communication and teamwork, and sometimes a technical deep dive into the candidate’s past work or projects. Finally, if the candidate performs well across all stages, the company may conduct reference checks before extending an offer. This structured but focused process ensures a well-rounded evaluation of both technical ability and team compatibility.

      Interview questions [1]

      Question 1

      Explain the MERN architecture. How do the components interact? Tests understanding of full-stack flow and how data moves from frontend to backend and database. How would you design a RESTful API using Express and MongoDB? Assesses backend design skills, routing, and database schema design. What are React hooks, and when would you use useEffect vs. useMemo? Evaluates React knowledge, state management, and performance optimization. How do you handle authentication in a MERN stack app? Covers JWT, session vs. token-based auth, and middleware in Node/Express. Describe how you’d implement pagination or infinite scroll in a React frontend. Looks at frontend data handling and user experience optimization. Live coding: Create a basic CRUD API using Express and Mongoose. Tests ability to write backend logic and interact with MongoDB. Live coding: Build a simple to-do app in React. Checks frontend skills, state handling (with or without Redux), and component design. Walk me through a MERN project you’ve built. What challenges did you face? Gauges practical experience, problem-solving, and ownership. How do you ensure performance and scalability in a MERN app? Explores knowledge of caching, indexing, load handling, and frontend optimizations. How do you debug a slow API endpoint or a frontend rendering issue? Reveals approach to performance bottlenecks and use of tools (e.g., Chrome DevTools, Postman, logs).
      Answer question
      1

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