Ways of creating thread. When to use runnable and when to use Thread. Abstract Class Instantiation of Abstract class Singleton classes Where singleton design can break? Custom class object as key in hashmap Identity hashmaps---equality is done using reference (==) Concurrent hashmaps--contains segments--1Sements = 1 Hasmap(Conceptually) Final class
Live coding + some questions about complexity of the solution. Load balancer. Some extra requirements once you implement the previous ones. Money transfer service, then SQL query of money transfer, then theory about DB mostly (ACID, isolation levels).
Do you know about Kafka and how to use it in a springboot project?
Which are the steps you do if an application runs slowly?
java coding in as per jd
The second round was a live pair programming session on HackerRank. The task was to implement a Circuit Breaker pattern.
Stream api related question and easy leetcode question
Java 8 Features: What are lambda expressions in Java? Provide an example. Explain the Stream API and its benefits. What are default methods in interfaces? Memory Management: How does garbage collection work in Java? Explain the difference between stack and heap memory.
Hashset Stream API Spring Annotations functional interfcae JVM architecture SQL DSA
Integrate Maps with streams? (only interviewer can understand this question) Limitations of autowiring? How do you deploy spring application jar?
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