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Java developer Interview Questions

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Past experiences

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Describe

Could you please share the technical test questions which asked on the mcq test for the java developer vacancy at NCS.

Why do you want to work for Atlassian?

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1. What are the issue might appear in multithreading? 2. Concurrent Hashmap how it works? why is better than synchronised block? 3. how to achieve locking? difference between lock and shynchronised 4. Design patterns related questions ( example of various design pattern) 5. how to secure micro services in Spring? 6. how to optimise a query if you find out its slow? 7. difference between arraylist and linkedlist, which one is better? 8. Gave me a scenario and asked me how to solve this? 9. Different Joins in SQL. 10. Future, callable, executor service. 11. S.O.L.I.D principle with examples.

1 Answer

The JD didnt mention about big data, hadoop or spark experience, but they asked about it.

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Do you mind doing repetitive time-costing routine work?

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OOPS questions

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What's your responsibility in current compnay

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mainly on data migration java exception handling and threads

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Sorting a given array with 10 elements (elements is integer type)

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What is your expected salary?

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