main features of java

Question 1

What is the fundamental programming paradigm of Java?

Answer 1

Java is fundamentally an Object-Oriented Programming (OOP) language, organizing code around ‘objects’ that encapsulate data and behavior.

Question 2

What are the core principles of Object-Oriented Programming in Java?

Answer 2

The core principles include Encapsulation, Inheritance, Polymorphism, and Abstraction.

Question 3

What is Encapsulation in Java?

Answer 3

Encapsulation is the practice of hiding internal data and providing controlled access.

Question 4

What is Inheritance in Java?

Answer 4

Inheritance allows the creation of new classes based on existing ones.

Question 5

What is Polymorphism in Java?

Answer 5

Polymorphism allows objects to take on multiple forms.

Question 6

What is Abstraction in Java?

Answer 6

Abstraction simplifies complex systems by modeling classes appropriate to the problem.

Question 7

What does ‘Write Once, Run Anywhere’ (WORA) mean in Java?

Answer 7

Java’s bytecode can run on any platform with a Java Virtual Machine (JVM), regardless of the underlying operating system.

Question 8

What contributes to Java’s robustness?

Answer 8

Java’s strong memory management (automatic garbage collection) and exception handling minimize errors and crashes.

Question 9

How does Java ensure security?

Answer 9

Java features bytecode verification and security managers to protect against malicious code.

Question 10

What enhances Java’s performance?

Answer 10

The JVM’s Just-In-Time (JIT) compiler optimizes bytecode into native machine code for efficient execution.

Question 11

What is multithreading in Java?

Answer 11

Java’s built-in support for multithreading allows concurrent execution of multiple tasks, improving application responsiveness.

Question 12

What is the significance of Java’s Rich API?

Answer 12

Java’s extensive standard libraries provide pre-built components for various tasks, from networking and database access to GUI development.

Question 13

What is the advantage of Java’s large community?

Answer 13

Java has a massive global community, providing ample support, resources, and libraries for continuous development and improvement.

Question 14

How is Java designed to be dynamic?

Answer 14

Java can dynamically load classes, allowing it to adapt to evolving environments.

Question 15

Why is Java considered simple?

Answer 15

Java was designed to be easy to learn and use, especially for programmers with a C/C++ background.

Question 16

What applications is Java used for?

Answer 16

Java is used for enterprise systems, Android development, scientific computing, and big data processing.