I applied through college or university. I interviewed at Oracle (Pittsburgh, PA) in Jul 2017
Interview
I applied through college and recieved a reply that I matched with a couple of teams. One of the teams was the Cloud and Silicon Team. I had one phone interview with two interviewers on the other side (one PM and one engineer). They asked me details about my projects and discussed multithreading/concurrency problems.
The second interviewer was based in Texas. He called me up and jumped on directly to a system design question where I had to design a banking transaction system that has services in New York, Tokyo and Bangalore. Each of them has a database at the location that only the server at the same location can access. Somehow, all the data in the three databases in always replicated. He wanted me to build a system somehow that would solve concurrency issues when a request from one user was recieved at all three servers at the same time.
Now, he placed a few constraints.
1. The servers cannot forward requests to each other.
2. They cannot access (or lock) each other's databases.
3. We cannot add more servers.
4. We are not allowed any global timestamp.
Basically, he added constraints as I gave the solution. When I had no answer left, he blurted something like "Nowadays, graduates have no idea about building systems". Then he moved on and said "Do you have any questions?". I responded "Sir, could you tell me the answer to the same question?".
Obviously, the guy had no answer. I'm glad I am not a part of his team.
1 technical phone screen covering basic networking and data structures, followed by a 4-round onsite loop focused heavily on Oracle Cloud Infrastructure (OCI) scale challenges. The rounds were split between low-level system execution, multi-tenant cloud architecture, and standard relational/non-relational database trade-offs. The interviewers kept drilling into network virtualization, hypervisors, and storage layers.
To prep, I needed to brush up on high-throughput cloud networking patterns and storage engine internals. I utilized Apex Interviewer to simulate full cloud infrastructure design problems.
Interview questions [1]
Question 1
Design a highly secure, multi-tenant virtual cloud network block storage migration system that allows live volume transfers between physical data centers without dropping active I/O operations.
Mostly coding question focused, and some talking about personal experience and terms. Some technical design, you could have chosen any language to complete the coding questions. Questions were simple technical concepts that person came up with at the moment.
Interview questions [1]
Question 1
Something like searching in logs using maps and filter/find data
decent amount of DSA and System design were asked, and behavioral questions. so prepare leetcode level questions and good amount knowledge in sql, java and also mostly oracle sql. overall it was good
