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Asked questions on Java HashMap. 1. If you used same string literal and string object as hash key, will the hash code be different? 2. How is bucket location decided in hashmap for a hash key? 3. Difference between hashmap, treemap and linked hashmap? Then asked design related question: 1. There are 'n' nodes of a service and these nodes are scalable i.e. they can increase or decrease in number. There is a database table with millions of rows but these rows also can vary from 0-million in count. We need to build a system where all nodes can read from this database while no two nodes read overlapping rows. How will you design this system? Asked question on virtual thread. And parallelization.
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Principal Software Engineer

Interviewed at UKG

3.2★
May 27, 2025

Asked questions on Java HashMap. 1. If you used same string literal and string object as hash key, will the hash code be different? 2. How is bucket location decided in hashmap for a hash key? 3. Difference between hashmap, treemap and linked hashmap? Then asked design related question: 1. There are 'n' nodes of a service and these nodes are scalable i.e. they can increase or decrease in number. There is a database table with millions of rows but these rows also can vary from 0-million in count. We need to build a system where all nodes can read from this database while no two nodes read overlapping rows. How will you design this system? Asked question on virtual thread. And parallelization.

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