Q. Garbage collectors - which one to use when. Q. Concurrency questions / program to write. Q. Java fundamentals - collection, abstract classes/interfaces, functional interfaces, unit testing in Java Q. Puzzles such as design a lift system Q. How to identify memory leaks, tune JVM for performance optimisation - provide examples how to achieve that.
The three fundamental pillars of OOP are: encapsulation, inheritance and polymorphism. Can you explain the shortly.
Write a quick sort algorithm
What makes you different from others for this role
Easy java questions, some database questions, work experience
Face to face interview - [Case study - group programming - coding/technical test ] Complete a partially completed REST API - the rest api consumes response from another rest api and produces a modified json response. Write appropriate logger statements, exception handling - adding the correct annotations(@controlleradvice and @exception handling) , calling the appropriate public methods and passing the right arguments in the public method of the custom exception class, Integrate with another REST API - using rest template to connect to another rest api and get the response and Object mapping (map the response object from other rest api to the response object of your api), Tools used - InteliJ, Swagger. you are allowed to google
Basic
All questions was theory base basic questions 1. what is hashmap 2. difference between LikedList and arrrayList 3. Internal architecture of LikedList 4. Difference between spring and spring boot 5. actuator 6 some annotations 7. frequency using hashmap
3 arrays (A, B, C) Find all a, b, c that maintain a+b=c Also implement a singleton class.
What was your most important task last year?
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