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Principal Research Engineer Interview Questions

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2,122 principal research engineer interview questions shared by candidates

Q. IPv4 and IPv6 validation in java[can't use regex so expect to write lengthy code with no test tools and no autocomplete remember all apis.] Q. From family tree, find if ancestor/sibling information?[they themself couldn't define how information is saved(so assume), no test data available, asked me to solve with dfs as well as bfs. Don't think of multiple marrage/step relationships, I was wrong in thinking it] Q: Design volume space availability service which will provide exact information on volume available.
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Principal Staff Engineer

Interviewed at Oracle

3.4★
Mar 2, 2023

Q. IPv4 and IPv6 validation in java[can't use regex so expect to write lengthy code with no test tools and no autocomplete remember all apis.] Q. From family tree, find if ancestor/sibling information?[they themself couldn't define how information is saved(so assume), no test data available, asked me to solve with dfs as well as bfs. Don't think of multiple marrage/step relationships, I was wrong in thinking it] Q: Design volume space availability service which will provide exact information on volume available.

Closest thing to a "coding" interview was a few mock PRs in the language required for the role. We went through a few different approaches to solving a particular problem and discussed the bottlenecks and potential pitfalls of each, with a focus on concurrency.
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Principal Software Engineer

Interviewed at Elastic

3.8★
Jul 31, 2020

Closest thing to a "coding" interview was a few mock PRs in the language required for the role. We went through a few different approaches to solving a particular problem and discussed the bottlenecks and potential pitfalls of each, with a focus on concurrency.

Take-home assignment to build compute in OCI, build a simple DropWizard app and extend it for a Fibonacci series, and more. Questions about technical experiences in the past, biggest achievements, toughest challenges, etc.
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Principal DevOps Engineer

Interviewed at Oracle

3.4★
May 10, 2023

Take-home assignment to build compute in OCI, build a simple DropWizard app and extend it for a Fibonacci series, and more. Questions about technical experiences in the past, biggest achievements, toughest challenges, etc.

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