I recently went through an on-campus interview process with Infosys. The role wasn’t explicitly mentioned during the shortlist, and the entire interview ended up being quite thorough, lasting about 1 hr to 1 hr 15 minutes.

Sharing my complete experience below. I’d love to hear your thoughts on what role this might be for and how my chances look!

1. Online Assessment (OA)

• Performance: Solved 1.25 out of 4 questions.
• I didn't get shortlisted initially, but got called up later in an additional shortlist. No specific job role was mentioned in the mail.

2. Interview Live Coding & Pen Paper Round

Right at the start of the interview, the interviewer had me log into the Infosys Wingspan portal:

• Live Coding: There were 2 coding questions given, and I was asked to solve any one. I solved the first one completely in about 15 minutes and explained my approach along with time and space complexity.
• Rotten Oranges (Discussion): He gave me a pen and paper and handed me the "Rotten Oranges" problem. I explained my Multi-Source BFS approach, and he was satisfied without needing me to write the code.
• C++ Stack Implementation: Asked me to implement a stack class using an array in C++. I wrote the class (though I initially forgot to write the constructor) and demonstrated initializing an object and pushing elements.
• JavaScript OOP (Inheritance): Asked me to explain inheritance with an example and write the code for it in JavaScript, which I did successfully.
• Trees: Explained what a tree is and wrote the code for Inorder Traversal.
• Graphs & Cycle Detection: When asked to explain a data structure in detail, I chose graphs. He asked me to write code to detect a cycle. I directly wrote a function taking an adjacency list. He had some doubts about how the adjacency list worked, but I cleared them up by explaining how it's built from an edge array (though he seemed a bit unconvinced about something minor, the core approach was correct).
• Heap: He asked me to implement a heap. I was honest and said I wasn't entirely sure of the exact implementation off the top of my head, but explained the core functionality, how it maps to a tree structure, and the time complexities for operations.

3. Core CS Subjects (OS & DBMS)

• Operating Systems: Covered a wide range of topics processes, threads, context switching, paging, fragmentation, and virtual memory. My initial explanation of virtual memory was a bit shaky, so he corrected me, but I answered the rest.
• DBMS & SQL:
  • Difference between SQL and NoSQL.
  • What type of DB MongoDB is, and why I used it across my projects instead of PostgreSQL (I was honest that I didn't have a rigid architectural reason, just used it for convenience).
  • Wrote a query to find the 2nd highest salary for each department using LIMIT and OFFSET, and explained how those keywords work.
  • Asked about window functions (couldn't recollect this and admitted it).
  • Scenario-based question on SQL Joins (picked the right join and explained why).

4. Projects, Tech Stack & AI Discussion

• MERN vs. AI Projects: He noticed all my projects were full-stack MERN builds and questioned why I hadn't built AI projects when so many students are doing them. I clarified that while I didn't train models from scratch, I have integrated LLMs and RAG chatbots into my web apps.
• There was a team project in my resume which had WebRTC , he asked me how signaling worked in WebRTCs and i mentioned i did not implement the WebRTC tech it was done by a teammate of mine
• AI/LLM Follow-ups: This led to a few technical questions on AI, including the definition of an LLM and hallucinations. I couldn't clearly answer a couple of question on AI, which he noted.

5. Conclusion & Feedback

• The interview wrapped up with him taking a photo of me and telling me I could leave.
• When I asked for feedback, he said I answered most questions well and that the overall interview was good.

PS: Used AI to frame the post better

Hopefully i get selected ,if so what role can i expect ?

I wanted to know how many students were shortlisted for the Prime interviews and how many were finally selected for the Prime role.

Also, how many days after the interview did you receive the results?

1- 12/12

2 - 1/12

3 - 1/12

4- 11/12

What are my chances What is the expected interview date?