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10+ Afras Interview Questions and Answers
Q1. What is redux ? How can we joint react with redux
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
Q2. How can we use component will unmount method in functional components by using hooks
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.
Q3. What is the DOCTYPE declaration in HTML, and why is it important
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.
Q4. How can you include external CSS and JavaScript files in an HTML document.
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.
Q5. What is HTML, and what is its role in web development?
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
Q6. 1)How we can use life cycle methods in functional components
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.
Q7. What is the purpose of HTML tags and attributes?
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.
Q8. How was the importance of html.
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
Q9. How was the importance of css.
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
Q10. Explain the basic structure of an HTML document.
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
Q11. What is the Html and css.
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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