Oracle OCI principal engineer interview process 1. screening round - past projects done and a coding question (LC easy to medium) sum 2 large decimal numbers 2. class design question - Mine sweeper game 3. managerial interview - purely behavioral and past projects 4. coding round (LC easy to medium) - sliding window log ratelimilter based duplicate rejection 5. Bartender round - behavioral question 6. HLD design round - IOT data collection system
All of them asked me what is my greatest professional achievement so far.
Learn about TreeMaps as many questions were related to sorting a result while inserting. Remember about Dynamic programming and Big O.
1. Simple string manipulation question on anagram, count occurrence 2. Shopping cart example 3. Blocking vs non blocking 4. Rest api
Combination of questions on your experence and also more opaque questions such as 'tell me who you are as a person'.
I was asked a series of questions ranging from leadership topics to more detailed engineering and data science questions. For example, was asked for specifics (but not low-level details) on how some machine learning algorithms worked, to test my breadth and depth of knowledge.
Describe direct report interactions, including difficult situations
SQL based question like how to delete duplicate rows from a table having no key column.
How do you implement Web Security in Java Spring boot application?
what interests you in this position?
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