Java Technical Interview Questions

Java

What is the JVM?
Define code compilation?
What is a constuctor?
What is the naming convention of variables in java?
What is an annotation and give an example.
What is the difference betwee '==' and equals() when comparing Strings?
What are the 8 primitive types in Java?
What is the difference between primitives and wrapper classes and when can we use each?
Define Encapsulation and outline its benefits.
Do objects get passed by reference or value in Java? Elaborate on that.
Explain the four OOP principles.
What is the difference between Abstract classes and Interfaces?
Is it possible to implement multiple inheritance in Java?
What is serialization? How do you implement it?
What are anonymous classes?
What does it means to say that a String is immutable?
What is the difference between method overloading and method overriding?
What are the access modifiers you know? What does each one do?
Do objects get passed by reference or value in Java? Elaborate on that.
What the difference between local, instance and class variables?
What is Dependency Injection?
What does the static word mean in Java? Can a static method be overridden in Java?
When is a static block run?
What is reflection?
How does the try{} catch{} finally{}
What is garbage collection? How does it work?
What is memory leak and how does Java handle it?
What does the keyword synchronized mean?
Explain Generics in Java

What is the difference between a GET and POST request?
What is a URI?
Differenciate between a client and host.
What is the difference between HTTP and HTTPS?
Point out these components(query, host, port, protocol, path ) in the following URL https://127.0.0.1:4200/login/a=bx?c
What is an Internet Protocol?