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10,181 software engineer principal interview questions shared by candidates

I was asked to lead a conference call with an external academic expert, to design a 'gamified' approach to the Walmart smartphone app, to structure and moderate a brainstorming session with several teams, to design a number of prototyping/testing programs, and asked many many questions. Remember, this all took place over one 9.5 hour session and another 5-day session!
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Principal Data Scientist

Interviewed at Walmart

3.4★
Nov 2, 2017

I was asked to lead a conference call with an external academic expert, to design a 'gamified' approach to the Walmart smartphone app, to structure and moderate a brainstorming session with several teams, to design a number of prototyping/testing programs, and asked many many questions. Remember, this all took place over one 9.5 hour session and another 5-day session!

1. How does arraylist work internally in java? if you were to implement array list how would you implement. Collections interface implementations and its differences. Whats the difference between set and list interface. Is Hashlist a thread safe or not. 2. Is there time difference in the array list is accessed, if the index is to the begining vs last. 3. How does HashMAp? Deep discussions about that, as well as HashMaps internal implementation details of O(n).
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Principal Software Engineer

Interviewed at NetApp

3.8★
Mar 18, 2014

1. How does arraylist work internally in java? if you were to implement array list how would you implement. Collections interface implementations and its differences. Whats the difference between set and list interface. Is Hashlist a thread safe or not. 2. Is there time difference in the array list is accessed, if the index is to the begining vs last. 3. How does HashMAp? Deep discussions about that, as well as HashMaps internal implementation details of O(n).

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