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- What is JavaScript?
- JavaScript is a programming language that helps make websites interactive. It runs in your web browser and makes web pages do cool things.
- Why do we use JavaScript in web development?
- We use JavaScript to make websites more dynamic and responsive. It lets us add interactivity, like buttons that change things on a page or forms that respond to what you type.
- Explain the difference between JavaScript and Java.
- JavaScript and Java have similar names, but they are different. JavaScript is mainly for web browsers, while Java is a general-purpose programming language used for many different things.
- What are variables in JavaScript?
- Variables are like containers that hold information. They let you store and use data in your code.
- What is a function in JavaScript?
- A function is like a mini-program inside your program. It’s a set of instructions that you can use over and over again.
- What is an if statement in JavaScript?
- An if statement is like a decision-maker in your code. It checks if something is true, and if it is, it does one thing; if not, it does another.
- Explain the concept of arrays in JavaScript.
- An array is like a list of things. It lets you store multiple items in one variable, so you can work with them together.
- What is the DOM in JavaScript?
- The DOM (Document Object Model) is like a tree of all the elements on a webpage. JavaScript can use the DOM to change, add, or remove things on the page.
- How does JavaScript handle asynchronous operations?
- JavaScript uses things like callbacks or promises to handle tasks that take time, like loading an image or getting data from a server, without freezing the whole page.
- What is “this” keyword in JavaScript?
- The “this” keyword refers to the current object in your code. It helps you access and work with the properties of the object you’re dealing with.