NCR Corporation Interview Experience for SDE (Off-Campus)

Round 1(Written Test and Coding): This round was conducted by Hacker Earth on 2nd Oct. 2020 for 150 minutes. It consists of 33 multiple choices and 2 coding questions. Multiple choice questions are from C, C++, Java, Data structures, DBMS, Operating systems. And it consists of 2 coding questions.

Round 2(Technical Round): This round was held on April 5th, 2021 for 1hour 30 minutes approx. 

1. First, they asked me to introduce myself.
2. They asked the difference between linear and non-linear data structures and some trees concept in data structures

They asked 3 coding question 

1. https://www.geeksforgeeks.org/sort-an-array-of-0s-1s-and-2s/ – asked me for an approach
2. Longest path in a tree – told me to code

Other Questions

1. Then they concentrated on the oops concept. So, you should be very confident and should have good knowledge. Basically, you learn, what is overloading or overriding and real-time examples but here they can ask what if I had a return type in overloading method? What if we have static in the parent method? Or what if we had private or public methods? They can give you a scenario like this. That’s why you should be well with the oops concept.
2. Then they gave some snippets from java. (I have mentioned that I’m good at java)
3. They asked me the difference between SQL vs MySQL
4. Some SQL queries 
5. They asked some puzzle: rat and poison puzzle (with different constraints)
6. they asked me if I had any questions. I asked a few questions, He answered them.  

Round 3(2nd level Technical Interview): This was held on 9th, April 2021 for 1 hour. First a brief introduction from both sides then the main interview starts.

1. First, he Introduced himself about his experience, In which technology he works and asked me to introduce myself
2. Then he asked me about my project and gave different scenarios for my project to check how I implement it and asked to add some features in my project and some Database questions on my project.
3. He asked me about WhatsApp  basically how it works and asked me how millions of users are able to use the server. When the receiver is offline where the sender messages get stored and when the sender is offline and entered the message where does this message get stored.
4. He asked me about how to handle multiple requests to the server
5. Lastly, they asked me if I had any questions. I asked a few questions, He answered them.  

Round 4(Managerial): This was held on 12, April 2021, 30 minutes. 

1. First a brief self-introduction.  
2. What do you learn from your interview experiences?  
3. Gave me scenario based question that : I’m having a small company which don’t have any branches, but the products are very famous so, he asked me now your given responsibility of the company to you, and you have good knowledge of the latest technologies how will you sell your products with great profits and how will you expand your company
4. Told me to say the approach for the suduko game
5. If I am having any offers from another company.
6. About strengths and weaknesses  
7. What is your greatest achievement till now?  
8. Why should I hire you?

This round was like a friendly discussion, just be honest and confident.

Round 5(HR): This took around 15 minutes. 

1. First, he asked me to introduce myself and my family details. Then he asked a few questions:
2. He asked me about my hobbies.
3. He asked me if I am ready for the internship
4. He then makes me understand the offer.

On the same day of the HR round after the interview, He called me and said that I am selected for the SW engineer position.