08: If Java did not have a stack or map, how would you ….

Q1 If Java did not have a Stack implementation, how would you go about implementing your own? A1 1) Determine the backing data structure (e.g. array, linked list, etc). 2) Determine the methods that need to be implemented like pop(…

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Arulkumaran Kumaraswamipillai

In 1999, I pivoted from mechanical engineering to become a self-taught Java expert. Over the past 19+ years, I have built a high-demand contracting career, delivering mission-critical solutions for 13+ top-tier organisations. With a proven track record that has generated over 130+ job offers, I help enterprises solve complex data challenges at scale.

Author of the book "Java/J2EE job interview companion", which sold 35,000+ copies on amazon.com & superseded by this site with 2000+ registered users.

Learn the key concepts & strategies to "talk the talk & walk the walk".

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Latest posts by Arulkumaran Kumaraswamipillai (see all)

How would you go about.. building an ETL pipeline to handle 3k TPS (i.e transactions per second) - April 17, 2026
00b: Python variable scopes, assigning types optionally and execution order interview Q&As - April 11, 2026
How to prepare for the Java job interviews? - January 3, 2026

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