what is a programming language and why we need programming language A programming language is a formalized set of instructions that a computer can interpret and execute. It serves as a means of communication between humans (programmers) and computers, allowing programmers to write code to instruct computers to perform specific tasks and operations. Programming languages

React is a javascript library to build interactive user interfaces and using react we can do 2. Difference between angular and react? React javascript library to create UI(View) can fit either single or multi-page applications operates on virtual DOM; updates the real browser DOM one-way Binding Angular Javascript framework to create complete front-end applications forces

Java Multithreading 1. What is multithreading in Java? 2. How do you create a thread in Java? 3. What is the difference between Thread and Runnable in Java? 4. What is the purpose of the start() method in Java threads? 5. How do you prevent thread interference and consistency issues in Java multithreading? 6. What

Java OOP’s Encapsulation: Abstraction: Inheritance: Polymorphism:

Java Exception Handling 1. What is an exception in Java? 2. Explain the difference between checked exceptions and unchecked exceptions in Java. 3. What are some common examples of checked exceptions in Java? 4. What are some common examples of unchecked exceptions in Java? 5. How do you handle exceptions in Java? 6. What is

Java Array 1. What is an array in Java? 2. How do you declare an array in Java? 3. How do you initialize an array in Java? 4. What is the default value of elements in an array in Java? 5. How do you access elements in an array in Java? 6. How do you

1. What is a constructor in Java? 2. What is the purpose of a constructor? 3. How is a constructor different from a regular method in Java? 4. Can a class have multiple constructors? 5. What is constructor overloading? 6. What is the default constructor in Java? 7. How do you call one constructor from

1. What is a method in Java? 2. How are methods declared in Java? 3. What is the purpose of the return statement in a method? 4. What is method overloading in Java? 5. What is method overriding in Java? 6. What is a constructor in Java, and how does it differ from a method?

1. What are the different types of variables in Java? 2. What is a local variable in Java? 3. What is an instance variable in Java? 4. What is a static variable in Java? 5. How is a constant defined in Java, and what’s its purpose? 6. What is the difference between final, finally, and

What is a class in Java? Explanation: A class in Java is a blueprint or template for creating objects. It defines the attributes (fields) and behaviors (methods) that objects of that class will have. In this example, we’ve defined a class called Person. Inside the class, we have: Classes are a fundamental building block in