HappyNewsMan (TechLead Pratap)

 Here’s a comprehensive list of 100 commonly asked JavaScript interview questions, covering a range of topics from basic to advanced concepts: Basic Questions What is JavaScript? What are the data types supported in JavaScript? What is the difference between undefined and null ? Explain variable hoisting in JavaScript. What are primitive and non-primitive data types? How does JavaScript handle type coercion? What is a closure? How do you create a function in JavaScript? What is the difference between == and === ? What is a callback function? What are arrow functions? Explain the this keyword in JavaScript. What is event bubbling and event capturing? What is the purpose of the bind , call , and apply methods? What are JavaScript templates (template literals)? What are the different types of scopes in JavaScript? Explain the concept of promises. What is the fetch API? How do you handle asynchronous code in JavaScript? What is an IIFE (Immediately Invoked Function Expression)? In...

 Here’s a list of basic JavaScript interview questions that can help you prepare: Basic JavaScript Questions What is JavaScript? JavaScript is a high-level, dynamic, and interpreted programming language that is primarily used for adding interactivity to web pages. What are the data types in JavaScript? JavaScript has several data types: Primitive: undefined , null , boolean , number , string , bigint , and symbol . Non-primitive: object . What is the difference between == and === ? == is the equality operator that compares values after type coercion, while === is the strict equality operator that compares both value and type without coercion. What is a closure? A closure is a function that retains access to its lexical scope, even when the function is executed outside that scope. It allows for private variables and functions. What is the this keyword? this refers to the context in which a function is executed. Its value can vary depending on how a function is called. What are ...

Angular 17 and Angular 18 have introduced several features and improvements that enhance the framework's capabilities. Here’s a summary of the main features: Angular 17 Features Directive Composition API Introduced a new way to compose directives, allowing developers to create more modular and reusable code by easily combining multiple directives. Functional Router Enhancements Improvements to the functional router API, making it more intuitive to define routes and handle navigation in a more declarative way. Improved Developer Experience Enhancements in error messages and debugging tools for a more streamlined development process, making it easier to identify and fix issues. Standalone Components Enhancements Further support for standalone components, allowing developers to build applications without the need for Angular modules, promoting a simpler architecture. Build Performance Improvements Optimizations in the Angular CLI and build processes that reduce build times and improve...

 Angular 2 brought significant improvements and features over its predecessor, AngularJS. Here are the main features of Angular 2: 1. Component-Based Architecture Angular 2 is built around a component-based architecture, allowing developers to create encapsulated components that manage their own view and logic. This promotes reusability and maintainability. 2. TypeScript Angular 2 is written in TypeScript, a superset of JavaScript that adds static typing. This enhances code quality, provides better tooling (like IntelliSense), and makes the code more maintainable. 3. Improved Dependency Injection Angular 2 features a more powerful and flexible dependency injection system that allows for better management of service instances, making it easier to manage dependencies within components. 4. Enhanced Performance Angular 2 was designed with performance in mind. Features like ahead-of-time (AOT) compilation, tree shaking, and improved change detection lead to faster rendering and improved...

 AngularJS, an open-source web application framework, offers several key features that simplify the development of dynamic web applications. Here are some of its basic features: 1. Two-Way Data Binding AngularJS synchronizes data between the model and the view, meaning any changes in the model are reflected in the view and vice versa. This reduces boilerplate code for keeping the UI and data in sync. 2. Dependency Injection AngularJS uses a dependency injection system to make components more modular and reusable. Services, controllers, and other components can easily access their dependencies, promoting a cleaner code structure. 3. Directives Directives are special markers in the HTML that tell AngularJS to attach specific behavior to elements or even transform the DOM. They enable the creation of reusable components and custom behaviors. 4. Templates AngularJS uses HTML templates that are extended with Angular-specific elements and attributes. This makes it easy to build dynamic v...

 CSS3 introduced several advanced features that enhance styling capabilities and improve web design. Here are some key features: 1. Flexbox A layout model that allows for the efficient arrangement of items in a one-dimensional space (either in a row or a column). It helps in creating responsive layouts without using floats or positioning. 2. Grid Layout A powerful two-dimensional layout system that allows for the creation of complex grid-based designs. You can define rows and columns, and place elements in specific areas of the grid. 3. Media Queries Enhanced support for responsive design, allowing styles to be applied based on device characteristics like screen size, orientation, and resolution. 4. Transitions Allows for smooth transitions between property changes. You can specify the duration and timing function for transitions, making UI changes more visually appealing. css Copy code .box { transition : background-color 0.5s ease; } 5. Animations CSS3 allows for keyframe ani...

 ere are some common CSS basic questions and answers that you might encounter in an interview: 1. What does CSS stand for? Answer: CSS stands for Cascading Style Sheets. It is used to style and layout web pages, including changes in color, font, layout, and spacing. 2. What is the difference between classes and IDs in CSS? Answer: Classes : Defined with a dot ( . ) and can be applied to multiple elements (e.g., .classname ). They are used for styling groups of elements. IDs : Defined with a hash ( # ) and should be unique within a page (e.g., #idname ). They are used for styling a single element. 3. What are the different ways to apply CSS to a web page? Answer: Inline CSS : Using the style attribute within an HTML tag. html Copy code < h1 style = "color: blue;" > Hello </ h1 > Internal CSS : Using a <style> tag within the <head> section. html Copy code < style > h1 { color : blue; } </ style > External CSS : Linking to an extern...