Zuci Systems Senior Java Developer Interview Questions, Process, and Tips

A Spring bean is a Java object managed by the Spring IoC container.

• Spring beans are defined in the Spring configuration file.

• Beans are created and managed by the Spring IoC container.

• Beans can be singleton, prototype, request, session, or global-session scoped.

• Example:

Hibernate query is object-oriented, while native query is SQL-based.

• Hibernate query is written in HQL (Hibernate Query Language) which is object-oriented and works with Java objects.

• Native query is written in SQL and directly interacts with the database tables.

• Hibernate query is more portable and can be easily switched between different database systems.

• Native query can be more efficient for complex queries or when per...read more

Inner join is used to combine rows from two or more tables based on a related column between them.

• Inner join returns only the rows that have matching values in both tables.

• It is commonly used in SQL queries to retrieve data from multiple tables based on a related column.

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column;

Spring bean is a Java object managed by the Spring IoC container.

• Java object managed by Spring IoC container

• Configured in Spring configuration file

• Can be singleton or prototype scoped

Annotations in Spring are used to provide metadata about the application's components.

• Annotations are used to configure Spring beans, controllers, services, repositories, etc.

• They help in reducing the configuration overhead by providing metadata directly in the code.

• Examples include @Component, @Controller, @Service, @Repository, @Autowired, @RequestMapping, etc.

Metadata provides additional information about the code, such as author, version, and purpose.

• Metadata can include information like author name, creation date, last modified date, version number, and purpose of the code.

• Annotations in Java can be used to add metadata to classes, methods, and fields.

• Metadata can help other developers understand the code better and make maintenance easier.

• Examples of metadata in Java inc...read more