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10+ AmbitionBox Front end Developer Interview Questions and Answers

Updated 5 Feb 2024

Q1. What is redux ? How can we joint react with redux

Ans.

Redux is a predictable state container for JavaScript apps.

  • Redux helps manage the state of an application in a predictable way

  • It provides a central store for all the state of the application

  • React components can access the state from the store using the connect() function

  • Actions are dispatched to the store to update the state

  • Reducers are pure functions that update the state based on the dispatched actions

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Q2. How can we use component will unmount method in functional components by using hooks

Ans.

Unmounting logic can be implemented using useEffect hook with a return statement.

  • Use useEffect hook with a return statement to implement unmounting logic

  • Return a function from useEffect hook to execute cleanup logic

  • Cleanup logic can include clearing intervals, removing event listeners, etc.

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Q3. What is the DOCTYPE declaration in HTML, and why is it important

Ans.

DOCTYPE declaration in HTML specifies the version of HTML being used in the document.

  • DOCTYPE declaration is placed at the very beginning of an HTML document before the <html> tag.

  • It informs the web browser about the version of HTML being used, which helps in rendering the page correctly.

  • It also helps in triggering the browser's standards mode, ensuring consistent display across different browsers.

  • Example: <!DOCTYPE html> specifies the document is using HTML5.

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Q4. How can you include external CSS and JavaScript files in an HTML document.

Ans.

External CSS and JavaScript files can be included in an HTML document using the <link> and <script> tags.

  • Use the <link> tag with the 'rel' attribute set to 'stylesheet' to include external CSS files.

  • Use the <script> tag with the 'src' attribute to include external JavaScript files.

  • Make sure to specify the correct file path in the 'href' attribute for CSS files and 'src' attribute for JavaScript files.

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Q5. What is HTML, and what is its role in web development?

Ans.

HTML stands for Hypertext Markup Language and is the standard markup language for creating web pages.

  • HTML is used to structure content on the web by using a series of elements and tags.

  • It provides the basic building blocks for creating websites, such as headings, paragraphs, images, links, and forms.

  • HTML works in conjunction with CSS (Cascading Style Sheets) and JavaScript to create visually appealing and interactive web pages.

  • Example: <h1>This is a heading</h1>, <p>This is a...read more

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Q6. 1)How we can use life cycle methods in functional components

Ans.

Life cycle methods can be used in functional components using React Hooks.

  • Use useEffect() hook to mimic componentDidMount(), componentDidUpdate() and componentWillUnmount() methods.

  • Use useState() hook to manage state in functional components.

  • Use useContext() hook to access context in functional components.

  • Use useReducer() hook to manage complex state in functional components.

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Q7. What is the purpose of HTML tags and attributes?

Ans.

HTML tags and attributes are used to structure and define content on a web page.

  • HTML tags are used to define different elements on a web page, such as headings, paragraphs, images, links, etc.

  • Attributes provide additional information about an element, such as its appearance, behavior, or functionality.

  • For example, the <img> tag is used to display an image on a web page, and the 'src' attribute specifies the image file to be displayed.

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Q8. How was the importance of html.

Ans.

HTML is a fundamental language for creating web pages and is essential for structuring content on the internet.

  • HTML stands for HyperText Markup Language

  • It is used to create the structure of web pages by using elements like headings, paragraphs, images, links, etc.

  • HTML is the backbone of web development and is essential for creating accessible and user-friendly websites

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Q9. How was the importance of css.

Ans.

CSS is crucial for styling and formatting web pages, enhancing user experience and creating visually appealing designs.

  • CSS is used to control the layout, colors, fonts, and overall appearance of a website.

  • It allows for responsive design, making websites adapt to different screen sizes and devices.

  • CSS can be used to create animations, transitions, and interactive elements on a webpage.

  • Without CSS, web pages would be plain and lack visual appeal, making it harder for users to n...read more

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Q10. Explain the basic structure of an HTML document.

Ans.

The basic structure of an HTML document includes the doctype declaration, html element, head element, and body element.

  • DOCTYPE declaration specifies the version of HTML being used

  • HTML element wraps the entire content of the document

  • Head element contains meta information about the document

  • Body element contains the visible content of the document

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Q11. What is the Html and css.

Ans.

HTML and CSS are the building blocks of web development, used to create and style web pages.

  • HTML stands for HyperText Markup Language and is used to structure content on a web page.

  • CSS stands for Cascading Style Sheets and is used to style the content created with HTML.

  • HTML uses tags to define elements like headings, paragraphs, images, and links.

  • CSS allows for styling elements with properties like color, font size, margin, and padding.

  • Both HTML and CSS are essential for crea...read more

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