behavioural questions (tell about last job, why Fidelity? what you like dislike about past job, describe your day) java questions thrown in (singleton, interfaces, abstract) java/javascript questions (design patterns, why microservices, abstract classes, === vs == in javascript)
How to define an immutable object in Java?
In a given system they provide, design a component diagram to support the implementation of the system?
Computer and Datacenter fundamentals. Systems and Operating System related and any language of your choice
Most difficult was laying out a radix tree and going through O(n) lookup and space advantages.
They asked my previous project architecture, product capabilities and challenges that i faced while working on that company.
Describe how to implement, basically, Java's LinkedHashMap.
Warehouse management system
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).
How do you determine the use of any data structure
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