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Questions and Answers
What is the primary purpose of CSS media queries in responsive web design?
What is the primary purpose of CSS media queries in responsive web design?
- To apply different CSS styles based on screen size or device type (correct)
- To create animations for web pages
- To style HTML elements with JavaScript
- To structure the content of web pages
Which of the following statements accurately describes semantic HTML elements?
Which of the following statements accurately describes semantic HTML elements?
- They should always replace all generic HTML tags
- They are used exclusively for styling web pages
- They are obsolete and no longer recommended
- They provide meaning and improve accessibility and SEO (correct)
What is the primary purpose of using a virtual DOM in React?
What is the primary purpose of using a virtual DOM in React?
- To compare changes and update only necessary parts of the real DOM. (correct)
- To directly update the real DOM for faster rendering.
- To simplify the state management of components.
- To replace the need for real DOM entirely.
Why is it important to use external stylesheets in web development?
Why is it important to use external stylesheets in web development?
Which statement accurately describes functional components in React?
Which statement accurately describes functional components in React?
What is the significance of the <!DOCTYPE html>
declaration in an HTML document?
What is the significance of the <!DOCTYPE html>
declaration in an HTML document?
What distinguishes props from state in a React component?
What distinguishes props from state in a React component?
Which feature allows developers to use state and lifecycle methods in functional components?
Which feature allows developers to use state and lifecycle methods in functional components?
What role does JavaScript play in web development?
What role does JavaScript play in web development?
What is the primary advantage of using Flexbox and Grid in CSS for responsive design?
What is the primary advantage of using Flexbox and Grid in CSS for responsive design?
What must JSX syntax return?
What must JSX syntax return?
What concept does React's Component-Based Architecture emphasize?
What concept does React's Component-Based Architecture emphasize?
How are HTML attributes such as class or for represented in JSX?
How are HTML attributes such as class or for represented in JSX?
How does responsive web design benefit user experience across devices?
How does responsive web design benefit user experience across devices?
What does the useEffect hook primarily manage in functional components?
What does the useEffect hook primarily manage in functional components?
Which statement about class components is true in the context of React's evolution?
Which statement about class components is true in the context of React's evolution?
What is the primary purpose of React's Virtual DOM?
What is the primary purpose of React's Virtual DOM?
Which HTTP method is used to delete a resource from the server?
Which HTTP method is used to delete a resource from the server?
What type of data flow does React follow?
What type of data flow does React follow?
Which of the following does NOT describe a characteristic of a RESTful API?
Which of the following does NOT describe a characteristic of a RESTful API?
What does the reconciliation process in React refer to?
What does the reconciliation process in React refer to?
Which element is essential for REST architecture?
Which element is essential for REST architecture?
How are changes in the component's state reflected in the UI?
How are changes in the component's state reflected in the UI?
What role do hooks like useEffect serve in functional components?
What role do hooks like useEffect serve in functional components?
Which React lifecycle method is NOT a standard method for class components?
Which React lifecycle method is NOT a standard method for class components?
What is the primary function of the POST method in RESTful APIs?
What is the primary function of the POST method in RESTful APIs?
How would you update a user with ID 1 using RESTful API?
How would you update a user with ID 1 using RESTful API?
Which tool is commonly used to send HTTP requests and view responses when testing an API?
Which tool is commonly used to send HTTP requests and view responses when testing an API?
What does a GET request generally do in the context of a RESTful API?
What does a GET request generally do in the context of a RESTful API?
Which statement is true regarding RESTful API conventions?
Which statement is true regarding RESTful API conventions?
In a RESTful API, how is a new user typically created on the server?
In a RESTful API, how is a new user typically created on the server?
What is the purpose of the Fetch API in relation to RESTful APIs?
What is the purpose of the Fetch API in relation to RESTful APIs?
Flashcards
Responsive Web Design (RWD)
Responsive Web Design (RWD)
A method of designing websites to adapt to different screen sizes, ensuring a good viewing experience on all devices like phones, tablets, and desktops.
Media Queries
Media Queries
CSS rules that apply different styles based on the screen size or device type. Used to make websites responsive.
Semantic HTML
Semantic HTML
HTML elements that describe the meaning of the content, rather than just its presentation. E.g.,
External Stylesheets
External Stylesheets
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Flexbox
Flexbox
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React Components
React Components
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Single-Page Application (SPA)
Single-Page Application (SPA)
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HTML
HTML
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Virtual DOM
Virtual DOM
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React Components
React Components
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Functional Components
Functional Components
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JSX
JSX
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Props
Props
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State
State
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React Hooks
React Hooks
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Unidirectional Data Flow
Unidirectional Data Flow
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React's Virtual DOM
React's Virtual DOM
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React Component Lifecycle
React Component Lifecycle
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Unidirectional Data Flow
Unidirectional Data Flow
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RESTful API
RESTful API
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Stateless API
Stateless API
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REST Principles
REST Principles
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Reconciliation
Reconciliation
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HTTP Methods
HTTP Methods
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HTTP GET
HTTP GET
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HTTP POST
HTTP POST
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HTTP PUT
HTTP PUT
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HTTP DELETE
HTTP DELETE
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RESTful API
RESTful API
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API Testing Tools
API Testing Tools
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API URL
API URL
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Client-Side JavaScript
Client-Side JavaScript
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Study Notes
Responsive Web Design (RWD)
- RWD adapts layouts to screen size, eliminating separate designs for different devices.
- Crucial for today's multi-device use (phones to desktops).
- Google prioritizes mobile-friendly sites in search rankings.
HTML
<!DOCTYPE html>
is crucial for correct rendering.<html>
,<head>
, and<body>
structure page content.- Semantic elements (e.g.,
<header>
,<nav>
,<section>
,<footer>
) improve accessibility and SEO, replacing generic<div>
or<span>
tags.
CSS (Cascading Style Sheets)
- Styles and lays out web pages.
- External stylesheets (linked via
<link>
) separate CSS from HTML for easier maintenance and scaling. - Modern layout techniques (Flexbox and Grid) create flexible and adaptive layouts.
- Media queries apply different styles based on screen size or device type.
JavaScript (JS)
- Adds interactivity (animations, form validations, responsive menus).
- A practical example is a responsive navigation menu, toggling on smaller screens.
React
- Popular JavaScript library for UI, particularly single-page applications (SPAs).
- Breaks down complex UIs into reusable components.
- Component-based architecture for manageable development and code reusability.
Virtual DOM
- React uses a virtual representation (Virtual DOM) of the actual DOM.
- Updates the Virtual DOM first, then efficiently updates the real DOM.
- Faster than directly updating the real DOM.
Unidirectional Data Flow
- React follows a one-way data flow model for easier debugging and understanding application state..
Components
- Building blocks of React applications.
- Functional components are simple JavaScript functions returning a UI (often JSX, similar to HTML).
- Class components are ES6 classes with more complex logic (though less common now with hooks).
JSX (JavaScript XML)
- Syntax that looks like HTML but is written inside JavaScript.
- Allows writing HTML structures within JavaScript.
- Embeds JavaScript expressions inside curly braces (
{}
) for dynamic content. - Classnames and for attributes are used as className and forName to avoid conflicts with JavaScript keywords.
Props
- Read-only data passed from parent to child components.
- Make components dynamic and reusable.
State
- Component data that can change over time.
- Managed internally, triggering re-renders when changes occur.
Hooks
- Special functions in React that enable accessing React features without classes.
useState
allows for adding state to functional components.useEffect
handles side effects (e.g., DOM manipulation, data fetching).
Component Lifecycle
- React components have phases (lifecycle) during operation.
- Class components have lifecycle methods for actions at specific points during operation.
- Functional components use hooks like
useEffect
to achieve similar behavior.
RESTful APIs
- Use HTTP methods (e.g., GET, POST, PUT, DELETE) for CRUD (Create, Read, Update, Delete) operations on resources.
- APIs are lightweight and efficient for network communications (intra or inter-network).
- Standard HTTP methods for interacting with resources: GET, POST, PUT, DELETE.
- Examples presented for CRUD operations (create, read, update, delete).
Testing APIs
- Tools like Postman make sending HTTP requests and viewing responses easy.
- Browsers can be used to test GET requests by entering the API URL.
Consuming RESTful APIs
- Use JavaScript's fetch API to make requests to RESTful APIs from webpages.
- GET requests retrieve data.
- POST requests send data to the API.
Error Handling in RESTful APIs
- HTTP status codes (e.g., 200 OK, 404 Not Found, 500 Internal Server Error) indicate request results.
- Proper error handling improves user experience by providing feedback.
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Description
Test your knowledge on Responsive Web Design (RWD) principles, including HTML, CSS, and JavaScript strategies for creating adaptable web layouts. This quiz covers essential concepts like media queries and semantic elements critical for modern web development.