Fresher - Front end developer interview 2024 | web developer interview | Reactjs developer interview

Summary

In this interview, Shya D, a fresher from Pune with a background in Information Technology, discusses their experience in web development. With 4-5 months of experience in the MERN stack, they demonstrate proficiency in frontend technologies like HTML, CSS, JavaScript, and React. Key points include an understanding of semantic HTML tags, CSS Flexbox, JavaScript data types, and React's declarative programming model. While they excel in core concepts, there are areas of improvement, such as event handling and deeper knowledge of JavaScript's array methods. Shya is eager to apply their skills and is actively seeking job opportunities.

Takeaways

• 😀 Shya D is a recent graduate with a Bachelors in Information Technology (2021) from Walchand College of Engineering, Sangli, currently looking for a job in web development.
• 😀 Shya D has been learning web development for 4-5 months, focusing on the MERN stack (MongoDB, Express.js, React, Node.js).
• 😀 In HTML, Shya correctly explains semantic tags like `<article>`, `<footer>`, and `<header>`, and their role in improving accessibility and SEO.
• 😀 Shya distinguishes between HTML tags and elements, clarifying that an element includes both the tag and its content.
• 😀 In CSS, Shya describes the cascading nature of styles and how later styles override earlier ones, although there's confusion about cascading in relation to parent-child elements.
• 😀 Shya defines Flexbox as a layout system in CSS, explaining that `display: flex` on a parent element makes all child elements behave like block-level elements.
• 😀 Shya understands the CSS Box Model, detailing how it consists of content, padding, border, and margin, and the difference between `content-box` and `border-box` box-sizing.
• 😀 In JavaScript, Shya correctly identifies the data types, explaining the difference between primitive (e.g., number, string) and non-primitive (e.g., object) types.
• 😀 Shya understands variable declarations in JavaScript, explaining the differences between `var` (function-scoped), `let` (block-scoped), and `const` (constant).
• 😀 In React, Shya explains the benefits of using React, particularly its modular component-based architecture, which simplifies managing dynamic content and virtual DOM for performance.
• 😀 While Shya demonstrates strong knowledge of web development, there's a gap in knowledge regarding advanced concepts like event bubbling/capturing and the difference between SVG and Canvas in HTML.

Q & A

What is HTML and what is its primary purpose?

HTML stands for Hypertext Markup Language. It is used to describe the structure and content of a web page, essentially providing the framework for all content that appears in the browser.

What are semantic tags in HTML and why are they important?

Semantic tags in HTML are tags that give meaning to the content they enclose, helping both the browser and developers understand the structure of the page. Examples include `<article>`, `<header>`, and `<footer>`. They also help improve search engine optimization (SEO).

What is the difference between a tag and an element in HTML?

A tag is the individual opening and closing tag (e.g., `<div></div>`), while an element includes the tag and the content inside it (e.g., `<div>content</div>`).

Can you give examples of inline elements in HTML?

Examples of inline elements in HTML include `<span>`, `<a>`, and `<img>`. Inline elements take up only the width of their content and do not start on a new line.

What is the difference between block-level and inline elements?

Block-level elements take up the full width of their parent container and start on a new line, while inline elements only take up the width of their content and can appear within a line of text without breaking the flow.

What is the box model in CSS?

The CSS box model describes the rectangular structure of elements, including the content area, padding, border, and margin. Understanding it is essential for controlling layout and spacing in a webpage.

What does the 'cascading' mean in CSS?

In CSS, 'cascading' refers to how styles are applied to elements in a hierarchy. Styles are applied from top to bottom, with later styles overriding earlier ones if there is a conflict. The cascade determines the order of style application based on specificity and location.

What is Flexbox in CSS?

Flexbox is a CSS layout model that allows items within a container to be aligned and distributed dynamically, making it easier to design flexible and responsive layouts. It provides properties like `display: flex` and `justify-content` to control the alignment and spacing of child elements.

What are promises in JavaScript and why are they useful?

A promise in JavaScript is an object representing the eventual completion or failure of an asynchronous operation. It is useful because it allows handling asynchronous code in a more manageable way, avoiding the problems of callback hell and making the code easier to read and maintain.

What is the difference between 'let' and 'var' in JavaScript?

'let' and 'var' are both used for declaring variables, but 'let' is block-scoped (only available within the block it's declared) while 'var' is function-scoped. Additionally, 'let' does not allow redeclaration within the same scope, whereas 'var' does.