dJAX Technologies Interview Preparation
Medium-HardAd Tech · Coimbatore
dJAX Technologies is a Ad Tech company hiring interns and freshers in Coimbatore, Tamil Nadu.
About dJAX Technologies
dJAX Technologies is a Coimbatore-based Ad Tech company that builds advertising and marketing technology platforms. Since 2008 it has developed adserver applications, custom RTB/OpenRTB solutions, and header bidding tools across display, video, mobile in-app, OTT/CTV, podcast and DOOH channels. The firm also offers white-label and custom solutions spanning DSP, SSP, programmatic, DMP, ad mediation and marketing automation.
Interview Rounds4
2–3 DSA coding problems on HackerRank, CodeSignal, or company platform
Data structures & algorithms — arrays, trees, graphs, dynamic programming
System design or low-level design — scalability, APIs, databases
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.