Top HTML Interview Questions and Answers
HTML (HyperText Markup Language) is the backbone of web development and a fundamental skill for anyone in the tech industry. If you’re preparing for an interview, these commonly asked HTML questions can help you showcase your expertise.
What is HTML, and why is it important?
HTML stands for HyperText Markup Language, used to create the structure of web pages. It allows developers to define headings, paragraphs, links, images, and more. HTML serves as the foundation for websites, enabling browsers to render content for users.What is the difference between HTML and XHTML?
HTML: A flexible and less strict version of markup language.
XHTML: A stricter, XML-based version of HTML that requires proper syntax.
For example, in XHTML:
All tags must be closed.
Tags and attributes are case-sensitive.What are semantic HTML tags?
Semantic HTML tags clearly describe their meaning to both the developer and the browser.
Examples:
: Defines the header section of a page.
: Defines the footer section.
: Represents self-contained content.
: Represents navigation links.
Benefits: Improves accessibility, SEO, and code readability.-
What is the difference between
and ?
: A block-level element used to group large chunks of HTML.
: An inline element used for styling small portions of text or other inline content.What is the purpose of the DOCTYPE declaration?
The declaration specifies the document type and version of HTML being used. It ensures that the browser renders the page correctly.What is the difference between and

JavaScript is the cornerstone of modern web development, and its main functions include event-driven programming, dynamic content generation and asynchronous programming. 1) Event-driven programming allows web pages to change dynamically according to user operations. 2) Dynamic content generation allows page content to be adjusted according to conditions. 3) Asynchronous programming ensures that the user interface is not blocked. JavaScript is widely used in web interaction, single-page application and server-side development, greatly improving the flexibility of user experience and cross-platform development.

The latest trends in JavaScript include the rise of TypeScript, the popularity of modern frameworks and libraries, and the application of WebAssembly. Future prospects cover more powerful type systems, the development of server-side JavaScript, the expansion of artificial intelligence and machine learning, and the potential of IoT and edge computing.

Different JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

JavaScript is the core language of modern web development and is widely used for its diversity and flexibility. 1) Front-end development: build dynamic web pages and single-page applications through DOM operations and modern frameworks (such as React, Vue.js, Angular). 2) Server-side development: Node.js uses a non-blocking I/O model to handle high concurrency and real-time applications. 3) Mobile and desktop application development: cross-platform development is realized through ReactNative and Electron to improve development efficiency.

This article demonstrates frontend integration with a backend secured by Permit, building a functional EdTech SaaS application using Next.js. The frontend fetches user permissions to control UI visibility and ensures API requests adhere to role-base

The shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.

I built a functional multi-tenant SaaS application (an EdTech app) with your everyday tech tool and you can do the same. First, what’s a multi-tenant SaaS application? Multi-tenant SaaS applications let you serve multiple customers from a sing
