A login page is validating user id and password by getting details from the database. But as the database has billion of rows and it is getting a long time to fetch the data from the database hence throwing errors. What should be the short-term and long-term solutions for this issue?
About springboot and angular's knowledge.
how Hash Map works, Backword compatibility
1. Each and every concept in Java, SpringBoot, Rest is covered 2. second highest salary from the table 3. can we replace @service with @component? why? 4. In depth question for each and every topic/question he asked.
Multi threading
Implementation of One Design Pattern Easy to Medium Level Coding Questions (Arrays, Stacks, Queues, Strings)
concurrent collections, executor framework in multithreading, diff annotation in spring boot, one to one and one to many mapping practical example.
Asked about MVC, SQL, and OOP
some are high level questions..
basic java questions internal working of Hashmap,Array list Linked List , Java 8 features , steam api, default method , oops etc Hibernate connections eager lazy , transactional property ... Spring bean type, DI , controller 2 coding question with medium level LeetCode difficulty
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