Rakuten Software Developer Engineer interview questions

The recruitment process took 3 months from the day of applying till getting offer. Overall it was a very challenging and good experience. Recruiters were very nice, professional and reply to all emails and clarifications but process took really long time. 1st round - Codility programming test with one program and video interview with 5 questions. Got the result in two days. 2nd round - Interview with managers for 30 minutes. Basic questions about background and technical experience. Interviewers were very nice, smiling and professional. Got the result in two days. 3rd round - Interview with senior manager for 30 minutes. Behavioral questions and questions on the technical background. Again, interviewer was good and got the result in two days. Before the final interview, I had to read two books written by CEO and give my honest opinion. 4th round - Interview with head of department for 1 hour. Highly professional and interview was very interesting. Fully technical and more technical than previous rounds. Had a good time and conversation and learnt few things. I attended very few interviews in my career so far and this is the best one and was an interesting experience. More challenging in the entire recruitment process was that I had to wait for more than a month to get the final result. Finally offer and then offer meeting. Eagerly waiting for my joining date to start working!!!

First I completed a programming test online. After that they gave a date for an Skype interview. The interview lasted around 45 minutes with the 3 interviewers asking me questions about my personality and also some technical ones about the languages and practices I knew. Lastly they asked about why Rakuten and why their branch in special