Node.js, often referred to as simply "Node," is a powerful open-source runtime environment that allows developers to execute JavaScript code outside of web browsers. It is designed for building scalable and efficient network applications, particularly on the server side. Node.js leverages a non-blocking, event-driven architecture, making it ideal for handling asynchronous operations and real-time applications. With its vast ecosystem of packages and modules available through npm (Node Package Manager), Node.js has become a popular choice for web development, microservices, APIs, and more, enabling developers to create high-performance applications with ease.
Show All Answers
Practice Test
121. What is authentication in the context of Node.js web applications?
A. Managing hardware devices
B. The process of verifying the identity of a user or client
C. A type of database
D. Handling HTTP requests
Show Answer
Report This Question
Answer: The process of verifying the identity of a user or client
122. What is authorization in Node.js?
A. A JavaScript library
B. The process of granting or denying access to specific resources or actions based on the authenticated user's permissions
C. A method for encrypting data
D. A type of middleware
Show Answer
Report This Question
Answer: The process of granting or denying access to specific resources or actions based on the authenticated user's permissions
123. Which Node.js middleware is commonly used for implementing authentication and user sessions?
A. express-authorization
B. passport
C. bcrypt
D. jsonwebtoken
Show Answer
Report This Question
Answer: passport
124. What is the primary role of the passport module in Node.js authentication?
A. To create HTML templates
B. To establish database connections
C. To provide a middleware-based authentication framework for various strategies (e.g., local, OAuth)
D. To handle routing
Show Answer
Report This Question
Answer: To provide a middleware-based authentication framework for various strategies (e.g., local, OAuth)
125. What is a common strategy used for user authentication with the passport module in Node.js?
A. OAuth
B. Bcrypt
C. JWT
D. All of the above
Show Answer
Report This Question
Answer: All of the above
126. What is a JSON Web Token (JWT) in the context of authentication in Node.js?
A. A token used for accessing hardware devices
B. A token used for database connections
C. A compact, URL-safe means of representing claims to be transferred between two parties
D. A session ID
Show Answer
Report This Question
Answer: A compact, URL-safe means of representing claims to be transferred between two parties
127. What is the primary benefit of using JWT for authentication in Node.js?
A. It eliminates the need for user sessions.
B. It simplifies the creation of HTML templates.
C. It allows stateless authentication, where user information is encoded in the token itself.
D. It improves the performance of database operations.
Show Answer
Report This Question
Answer: It allows stateless authentication, where user information is encoded in the token itself.
128. What is a role-based access control (RBAsystem in the context of authorization in Node.js?
A. A method for handling HTTP requests
B. A mechanism for managing hardware devices
C. A system that assigns specific roles to users and grants permissions based on those roles
D. A type of authentication strategy
Show Answer
Report This Question
Answer: A system that assigns specific roles to users and grants permissions based on those roles
129. In Node.js authorization, what is the purpose of defining access control rules or policies?
A. To encrypt data
B. To establish database connections
C. To specify which users or roles can perform specific actions or access certain resources
D. To create HTML templates
Show Answer
Report This Question
Answer: To specify which users or roles can perform specific actions or access certain resources
130. What HTTP status code is typically returned when a user tries to access a resource for which they are not authorized in Node.js?
A. 200 (OK)
B. 403 (Forbidden)
C. 404 (Not Found)
D. 401 (Unauthorized)
Show Answer
Report This Question
Answer: 403 (Forbidden)
