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Photon Interview Preparation

Medium-Hard

Technology · India

Photon Ai, Pvt. Ltd. is your premier Information & Communication Technology (ICT) System Integrator (SI) and a Managed Services Provider (MSP) Photon has designed, built and operates marque data center and contact center projects in India as a SI technology partner, consultant and MSP. Photon is now present in the USA through our subsidiary Photon Ai, Inc. based in San Francisco, California, conducting advanced research in artificial intelligence (Ai) and building products based on Ai.

280+ questions4 rounds5 expert tipshttps://photonai.in

About Photon

Photon Ai, Pvt. Ltd. is your premier Information & Communication Technology (ICT) System Integrator (SI) and a Managed Services Provider (MSP) Photon has designed, built and operates marque data center and contact center projects in India as a SI technology partner, consultant and MSP. Photon is now present in the USA through our subsidiary Photon Ai, Inc. based in San Francisco, California, conducting advanced research in artificial intelligence (Ai) and building products based on Ai.

Interview Rounds4

1
Online Assessment60–90 min

2–3 DSA coding problems on HackerRank, CodeSignal, or company platform

2
Technical Interview I45–60 min

Data structures & algorithms — arrays, trees, graphs, dynamic programming

3
Technical Interview II45–60 min

System design or low-level design — scalability, APIs, databases

4
HR / Culture Round30 min

Career goals, teamwork, strengths/weaknesses, role expectations

Practice Questions10

Key Topics

  • Data Structures & Algorithms150q
  • System Design50q
  • Object-Oriented Design40q
  • SQL & Databases25q
  • CS Fundamentals (OS, Networking)25q

Expert Tips

  • Practice LeetCode easy and medium problems before the OA — focus on arrays, strings, trees, and graphs.
  • For system design, use the RESHADED framework: Requirements, Estimation, Storage, High-level design, APIs, Detailed design, Evaluation.
  • Prepare 3–4 STAR stories covering: a challenge you solved, a time you worked in a team, a project you owned end-to-end.
  • After every coding solution, proactively state the time and space complexity — interviewers expect it.
  • Study common CS fundamentals: process vs thread, TCP vs UDP, REST vs GraphQL, SQL indexing, CAP theorem.