The interview was scheduled to be conducted at 8.00 AM (28th Feb 2016), I reached VSSC ATF centre at around 7.30 AM. After the document verification, they allotted numbers for each candidate base on the following priority: (i) Girls (ii) Those who booked their tickets on the same day (actually on the interview letter they mentioned that in worst case, it needs two days for the interview). As I booked the ticket for the next day evening, they called me around 7.10 PM.
There were seven peoples sitting in a semi-circle. They didn’t ask me about myself or what I do. Firstly, they questioned me about my project work. As soon as I started explaining, they interrupted me (seemed that they were either not interested or because of time constraint since there were three more peoples waiting to be interviewed). Next, I was asked what my favorite subject are. I mentioned (i) Operating Systems (ii) Data structures (iii) Computer Networks in order. The interviewer who was sitting in the middle asked others to start off with Data Structure.
Here is a list of questions I was asked and those which I remember now:
Interviewer – I:
- What is binary heap? Types? Properties? [Answered]
- Application of the Heap [Answered]
- Abstract data type and its use [Answered]
- Stacks, Grow-able stack and queue and their use [Answered]
- Dynamic memory allocation [Answered]
Interviewer – II:
- Questions regarding routing algorithm [Answered]
- A question on FILE’s in C: The temporary buffer of file [Answered as “RAM”, I don’t know it is right or not]
- WAN protocol [Not answered]
Interviewer – III:
- Memory leak in Java [I didn’t know about this in Java, offered an explanation w.r.t. C instead]
- C pre-processor [Answered]
- Phases of compiler [Answered]
- JAR file in Java. [I admitted that I am not familiar with Java. What all I could remember is using JAR file in my Nokia S40 series. They didn’t seem to be very impressed]
- For the interview round, they didn’t expect an one word brief reply. There were some discussions happened for every answer like Implementation ,application of it etc..They will help if you stuck but they wanted the answer from your mouth.
- The questions were mostly based on the feedback. Meaning that, the next question will be based on your answer for current question. So think twice before you answer.
- As you see from my interview questions that they can ask you from any computer science subject[not only on your favorite subjects].Even I had in depth discussion on Compiler design which I don’t have in my B.Tech course ware.
- For some of the interviewee’s the questions were from Mathematics notably from Geometry, Discrete Mathematics etc.
- One candidate, who works in a PSU, was not allowed to attend interview because of not having NoC letter from his company.
- The candidates who attended the interview were quite knowledgeable and experienced. Most of them passed out before 2011 or 2012. Probably, only two of them including me were 2015 pass-outs[w.r.t boys]. The companies they were working include Adobe, Samsung research, Adobe, GATE CSE tutors , Asst. Professors, IIsc and IIT M.Tech. students and from PSU’s.
- Some of the candidate’s came there were attended interview before hand in ISRO[previous year’s].
To conclude, you should be top of your game and need a bit of luck in terms of questions they start with.