How does a Content Security Policy (CSP) help in preventing XSS attacks?
- It allows only inline scripts
- It encrypts the communication
- It filters HTTP headers
- It restricts the sources of content
A Content Security Policy (CSP) helps prevent XSS attacks by restricting the sources of content, reducing the risk of malicious script execution from unauthorized sources.
To maintain a separation of concerns, servlets in MVC should not directly manipulate the __________.
- Controller
- Database
- Model
- View
To maintain a separation of concerns, servlets in MVC should not directly manipulate the Controller.
The __________ method in servlets is often used to dispatch requests to different handlers in an MVC framework.
- doDispatch()
- doPost()
- init()
- service()
The doDispatch() method in servlets is often used to dispatch requests to different handlers in an MVC framework.
In a complex web application using MVC and servlets, a new feature requires integration of a third-party service. Where should this integration primarily take place?
- In a separate utility class
- In the Controller
- In the Model
- In the View
In MVC architecture, business logic, including third-party service integration, is primarily handled in the Controller. This ensures separation of concerns and makes the application more modular.
A web application needs to redirect the user to different pages based on their role. How should this logic be implemented using servlets in MVC?
- In the Controller
- In the Model
- In the View
- Using servlet filters
The logic for redirecting users based on their role should be implemented in the Controller. The Controller handles the application's flow and decides which view to render based on the user's role.
A servlet is configured with specific initialization parameters. How does this impact the servlet's processing of requests?
- The parameters are accessible using the getInitParameter() method within the servlet.
- The parameters are accessible using the request.getParameter() method.
- The parameters are automatically injected into the servlet methods.
- The parameters are only accessible in the doPost() method.
When a servlet is configured with specific initialization parameters, these parameters can be accessed within the servlet using the getInitParameter() method, allowing customization of the servlet's behavior based on the configuration.
When optimizing an MVC application for performance, where should caching strategies be implemented in relation to servlets?
- In a separate caching layer
- In the Controller
- In the Model
- In the View
Caching strategies, for optimizing performance, should be implemented in the Model. The Model is responsible for data access and processing, making it an appropriate place to introduce caching mechanisms.
How can input sanitization be ineffective against certain advanced XSS attacks?
- By encoding payloads
- By exploiting browser vulnerabilities
- By using Content Security Policy (CSP)
- By using client-side validation
Advanced XSS attacks may bypass input sanitization through techniques like exploiting browser vulnerabilities, making sanitization ineffective in preventing such attacks.
Describe the role of Subresource Integrity (SRI) in preventing XSS attacks.
- Encrypts sensitive user information
- Enforces Same-Origin Policy
- Ensures secure transmission of data
- Validates and verifies external scripts
Subresource Integrity (SRI) is a security feature that helps prevent XSS attacks by ensuring the integrity of external scripts, validating and verifying that they haven't been tampered with.
To prevent XSS attacks, it is essential to _________ user input and _________ user output.
- decode
- encode
- sanitize
- validate
To prevent XSS attacks, it is essential to sanitize user input and encode user output. Sanitizing helps remove potentially harmful content, and encoding ensures that user data is displayed correctly and safely in the browser.