Core Java & OOPs: Explain OOPs concepts with real-world examples. Difference between String, StringBuilder, and StringBuffer. How Garbage Collection works in Java. Why String is immutable in Java. HashMap vs LinkedHashMap vs TreeMap. HashMap vs ConcurrentHashMap & internal working. Spring Boot & Hibernate: Spring Boot Auto-Configuration explained. Difference between @Component, @Service, and @Repository. Pagination & Sorting in Spring Data JPA. EAGER vs LAZY fetching in Hibernate. Global Exception Handling in Spring Boot. Database & SQL: SQL query to fetch the second-highest salary. How to find duplicate records in a table. INNER JOIN vs LEFT JOIN. DevOps & Others: Docker usage in deployments. REST vs SOAP APIs. Strategies to improve application performance in Java. 💡 Additionally, there was a project-related discussion around my academic work.
Ingeniero De Software Java Junior Interview Questions
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Describe the SQL joins. (Inner Join, Right Join, Left join, Full Outter Join)
What is the difference between Authboxing and Unboxing
What is the difference between static and final keywords
Java basics, OOP concepts, SQL schema
Core java , database, project
core java concepts, oops, multithreading, exception handling, etc
Questions om core java, advance java , spring
polymorphism programme by passing reference variable to the object.
i)Write programs in ur language the basic fibonacci, patterns, sum of prime no in given range ii) write sql queries for a given table so practice sql queries iii) one has html related questions like what is cell padding, cell spacing, write an html program to create a table and how to merge the rows and colums
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