Progressive Web Applications (PWAs) are web apps that offer a native app‐like experience in the browser. They are designed to work offline, load quickly, and engage users with features like push notifications.
Which of the following is a key feature of Single Page Applications (SPAs)?
A Static content
B Dynamic content loading
C Page reloading
D Multiple pages loading
Single Page Applications (SPAs) load a single web page and dynamically update the content based on user interactions. This allows for a smoother, faster experience without full‐page reloads.
Which of the following best describes the use of a database in web applications?
A Manage routing
B Handle user interactions
C Store data persistently
D Enhance page visuals
Databases in web applications are used to store data persistently. This allows web apps to manage user data, content, and settings, ensuring data remains available even after page reloads or server restarts.
Which of these frameworks is typically used for building SPAs?
A Django
B React
C PHP
D Flask
React is a JavaScript library widely used for building SPAs. It allows for the creation of reusable UI components and efficiently updates only the parts of the page that change, providing a fast, dynamic experience.
What is the main advantage of Progressive Web Apps (PWAs) over traditional web apps?
A Work offline
B Only accessible via browser
C Require app store
D Complex to implement
PWAs work offline by caching content, enabling users to continue using the app even without an internet connection. This makes PWAs reliable and enhances the user experience, especially in areas with poor connectivity.
Which of the following is commonly used to interact with a database in web applications?
A JavaScript
B CSS
C HTML
D SQL
SQL (Structured Query Language) is used to interact with relational databases. It allows web applications to retrieve, insert, update, and delete data, which is essential for dynamic, data‐driven websites and applications.
Which feature of SPAs makes them different from traditional multi-page web applications?
A Faster loading
B Multiple page reloads
C Page-specific URLs
D Slow interactions
SPAs load faster because they only load the initial HTML page and dynamically update content, reducing the need for full page reloads. This leads to faster interactions and a smoother user experience.
Which technology is commonly used for real-time updates in SPAs?
A SQL
B WebSockets
C AJAX
D CSS
WebSockets provide real-time communication between the client and server, allowing SPAs to receive live updates without refreshing the page. They are commonly used in chat apps, live notifications, and gaming applications.
Which of the following is a common feature of Progressive Web Apps (PWAs)?
A Requires installation from an app store
B Limited offline functionality
C Native app-like experience
D Full dependency on the web server
PWAs offer a native app‐like experience directly in the browser. They can be installed on the device’s home screen, work offline, and provide features like push notifications, making them feel similar to mobile apps.
What is the purpose of using AJAX in web development?
A Asynchronously load content
B Enhance page styling
C Handle database queries
D Secure user data
AJAX (Asynchronous JavaScript and XML) allows web pages to load data asynchronously, meaning content can be updated without reloading the entire page. This enables smoother interactions and faster loading times in web applications.
Which technology is often used for handling routing in Single Page Applications (SPAs)?
A JavaScript
B React Router
C Flask
D SQL
React Router is a library used for routing in SPAs. It enables the navigation between different views or components without reloading the page, providing a seamless and dynamic user experience.
What does a PWA need to work offline?
A React components
B CSS stylesheets
C Database integration
D Service workers
Service workers are scripts that run in the background of a PWA, enabling offline functionality by caching resources. They allow PWAs to continue functioning even without an internet connection, improving the user experience.
Which of these web technologies is used to build a backend for SPAs?
A CSS
B MySQL
C Node.js
D React
Node.js is commonly used for building the backend of SPAs. It enables JavaScript‐based server‐side programming, providing the necessary functionality for handling API requests, authentication, and real-time communication in SPAs.
What is the main benefit of using WebSockets in SPAs?
A Reduces server load
B Real-time data transfer
C Fast page rendering
D Enables offline access
WebSockets provide real-time, bidirectional communication between the client and server. This enables features like live chat, instant notifications, and real-time updates in SPAs, creating dynamic and interactive user experiences.
Which of the following is a database type commonly used in web apps?
A NoSQL
B HTML
C CSS
D JavaScript
NoSQL databases, such as MongoDB, are often used in web applications to store data that doesn’t fit neatly into tables. They are designed for scalability, flexibility, and performance, making them ideal for modern web apps.