I applied through university. The process took 2 days. I interviewed at ZS Associates (Calcutta) in Sept 2015
Interview
There were four rounds..
1. Written Round(online) - aptitude questions(English, logical reasoning, Quantitive ability)
2. Group Discussion(1 minute for thinking and 15 minutes discussion)
3. Case Study(30 minutes) and Case Interview(SQL querries(for ppl with Computer Science background) and case based questions)
3. HR Interview(General HR questions and puzzles)
Interview questions [1]
Question 1
The written round contained apti questions. Level-not so tough. It was held on aspiring minds.Then there was a Group discussion in groups of 12.The topic was "E-commerce-Will the bubble burst?". Then there was a Case Study round. 30 minutes case study and then a case interview based on the case study. The case was something related to book my show. Since I am from Computer Science, they asked questions based on DBMS(Sql querries). What you write during the case study time doesn't matter much. It's the case interview which is important. They may ask you simple puzzles too. Then there was this HR interview with general HR questions like a challenge you faced, a failure you had and questions related to projects. They also asked 2-3 simple puzzles. That's it.
Lengthy and time consuming but process is very good nothing casual and systematic I cleared 3 rounds and in the last round I didn't get positive feedback. So process was nice but we can't say how they judge you even in the last round and reject you.
Interview questions [1]
Question 1
Puzzle, guesstimates, genral aptitude questions and many more general questions
I applied through university. I interviewed at ZS Associates
Interview
Aptitude round followed by 2 technical rounds and then HR round at last.
Overall experience was good, prepare basics of SQL, be strong in database management and prepare puzzles, why zs is most frequent question
The rounds are as below
Aptitude- quants, verbal, reasoning and DI
Apti is easy to moderate
Video interview- Hr and guesstimate
Should not fumble and be confident
Mini case study -no calculations , Easy theory questions
Case study solving- has graphs and DI
Have to be quick
Case study discussion with interviewer and puzzles
HR is last round of the process
All the best