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dronacharya.ai

C-DOT

PlacementSoftwareHardware and VLSIEmbeddedElectricalResearch

Built from 3 candidate reports with 9 first-hand accounts, covering 2025-26, 2024-25, 2023-24.

Hiring process

Roles: Scientist-B
  1. 1

    Resume shortlist

    Resume shortlisting
    eliminatory

    No written test. 22 shortlisted; about 16 remained for round 1 as some were already placed.

  2. 2

    Technical interview

    Interview round 1
    Google Meetonlineeliminatory

    OSI model and protocols · deque · company knowledge · software development cycle · AI model basics · sockets and ports · BFS and DFS · ACID · ER diagram · process, thread, PCB

    15 min in one account, 20-25 min in another; panel of three in one. About 8 candidates moved ahead from this round. Quick breadth across CS fundamentals.

  3. 3

    Other round

    Online psychometry test
    45 min80 questionsonline

    personality · agree/disagree scale

    Taken from own room in a time window. Every question must be answered before the next appears; similar questions recur so answers should stay consistent. One account says everyone clears it.

  4. 4

    Technical interview

    Interview round 2, panel
    offlinehardeliminatory

    course projects · linking · C pointer arithmetic · networking: video calling, QoS · memory access, paging, TLB · page replacement and LRU · why databases · IPC · locks and semaphores · public vs private IP, flow control · packet path across routers, BGP, ARP, NAT · OOP class design · data structure selection · STL containers

    Offline panel of three. 45-60 min in one account and 65 min in the other. Vague high-level questions drilled to deep detail; strong depth expected in either OS or networking. Paper provided for code.

  5. 5

    HR interview

    HR round
    offlineeasy

    background · entrance exam ranks and CPI · why this organisation · family and interests · expectations

    15-30 min in one account, unstated in the other. Relaxed, taken by the HR head.

Advice from candidates

31 pieces of advice, in their own words. Names removed.

  • Revise the core subjects, specially Computer networks (OSI layers - Imp). I prepared from my notes and online notes as well. I referred to the previously asked questions by C-DOT for this role, these are available online, GFG has most of the interview experience related articles. It will help you get an idea of what topics you need to focus on and the difficulty level of questions.

    preparation · 2023-24

  • Be confident, greet them enthusiastically and do not get nervous. Even if you get a question wrong or if you don't know the answer, let them know the same and keep calm. Make sure to think before you speak, because the questions are asked based on your answers. You would be the one navigating the interview.

    interview · 2023-24

  • Have a strong understanding of core subjects in CS: CN (important as it is CN company), OS, DBMS, Algorithms

    preparation · 2023-24

  • Be honest, keep a happy face throughout the interview, avoid mistakes while speaking, tell you don't know if you don't (no one is expected to know everything), think, then answer. While answering, try to give examples of where it is used in real life or how it can be used.

    interview · 2023-24

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Question patterns reported

The kind of problem, not the problem itself. Our practice questions are written to match these patterns.

  • Technicalexplain OSI layers using a video-call example
  • Technicalwrite a simple SQL query from given conditions
  • Technicallinked list basics
  • Technicalpick structures for a top-ten leaderboard under changing constraints
  • Technicalfixed buffer that overwrites its oldest packet
  • Technicalpath of data between hosts across routers and gateways