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Describe the singleton design pattern in Java. What are its advantages?
The Singleton design pattern is a creational pattern that ensures a class has only one instance and provides a global point of access to that instance.
How does garbage collection work in Java? Explain the different types of garbage collectors.
Garbage collection in Java is the process by which Java programs manage their memory automatically.
How to handle exceptions using try, catch, finally, throw, and throws in Java?
Handling exceptions in Java involves using several keywords and constructs.
What are synchronized methods and blocks in Java?
Synchronized methods and synchronized blocks are mechanisms used to ensure that only one thread can access a particular resource or section of code at a time.
Discuss the volatile keyword in Java and its role in concurrency.
Volatile keyword is used to indicate that a variable's value may be modified by multiple threads concurrently.
Differentiate between checked and unchecked exceptions in Java with examples.
Exceptions are categorized into two main types that are checked exceptions and unchecked exceptions.
Explain the Stream API introduced in Java 8. How does it work?
The Stream API, introduced in Java 8, is a powerful feature that allows for functional-style operations on collections of data.
What are lambda expressions in Java? How do they simplify code?
Lambda expressions in Java are a feature introduced in Java 8 that provides a clear and concise way to represent instances of single-method interfaces.
Explain the concept of OOP (Object-Oriented Programming) in Java.
Object-Oriented Programming (OOP) is a programming paradigm that revolves around the concept of objects, which are instances of classes
Explain the difference between TreeSet and HashSet in Java.
TreeSet and HashSet are two popular implementations of the Set interface in Java, each with distinct characteristics and use cases.
HashMap in Java and how does it work internally?
HashMap is a class that implements the Map interface, storing key-value pairs. It allows one null key and multiple null values.
Compare ArrayList and LinkedList in Java.
ArrayList and LinkedList are two commonly used implementations of the List interface in Java, each with distinct characteristics and use cases.