1. List and Arraylist Differences 2. What happens when element with same key is added into HashMap 3.Spring boot beans and how we can avoid bean instantiation 4.Profile annotation in spring 5.what are the configuration added in pom.xml for databases 6.Data structure

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Explanation of differences between List and ArrayList, HashMap behavior with same key, Spring boot beans, Profile annotation in Spring, database configurations in pom.xml, and data structures.

List is an interface while ArrayList is a class that implements List interface
HashMap replaces the old value with the new value if the same key is added
Spring boot beans can be avoided by using @Lazy annotation
Profile annotation in Spring allows defining different configurations for different environments
Database configurations in pom.xml include dependencies for JDBC drivers and connection properties
Data structures are used to store and organize data efficiently

1. List and Arraylist Differences 2. What happens when element with same key is added into HashMap 3.Spring boot beans and how we can avoid bean instantiation 4.Profile annotation in spring 5.what are the configuration added in pom.xml for databases 6.Data structure

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