Interview Prep

Java Interview Questions: https://github.com/a11exe/java-interview?tab=readme-ov-file

Single Responsibility Principle (SRP): A class should have only one reason to change.

Open/Closed Principle (OCP): It states that a class should be open for extension but closed for modification.

Liskov Substitution Principle: "Subtypes must be substitutable for their base types."

Interface Segregation Principle: A class should not be forced to implement interfaces it does not use.

Dependency Injection: It allows a class to depend on abstractions (interfaces) instead of concrete implementations, improving flexibility, testability, and maintainability.

Stack - saves function calls of java program. local variable and method calls. Reference of object is stored in stack. heap = saves object which is created by new keyword. Actual object is stored in heap