How can servlets be effectively used to implement the front controller pattern in an MVC application?
- Delegate control to JSP pages
- Directly connect the servlets to the database
- Implement a central servlet that handles all incoming requests
- Use multiple servlets for each controller action
Servlets can effectively implement the front controller pattern by having a central servlet that handles all incoming requests, allowing for a centralized point to manage request handling in an MVC architecture.
In an advanced MVC framework, how is the decision made in a servlet to select a specific view based on business logic?
- All views are pre-defined in a configuration file
- Views are dynamically determined based on business logic
- Views are hardcoded in the servlet
- Views are randomly selected
In an advanced MVC framework, the decision to select a specific view is often based on dynamic business logic, allowing for flexibility in choosing views based on the outcome of the application's processing.
How do servlet filters complement the MVC architecture in web applications?
- Filters can preprocess requests and post-process responses, adding a layer of functionality
- Filters cannot be integrated with MVC architecture
- Filters handle only authentication tasks
- Filters replace the need for controllers in MVC
Servlet filters complement the MVC architecture by providing a mechanism to preprocess requests and post-process responses. They add a layer of functionality that can be applied across multiple components, enhancing the flexibility of the MVC design.
In an MVC framework, a servlet often delegates business logic processing to __________.
- DAO
- controller
- model
- view
In an MVC framework, a servlet often delegates business logic processing to the controller layer, which is responsible for handling user input and coordinating the application's response.
The servlet forwards the processed data to the view using the __________ mechanism.
- forward
- include
- request
- response
The servlet forwards the processed data to the view using the forward mechanism, allowing the view to render the updated information based on the servlet's processing.
Which HTTP header can be used to mitigate some types of XSS attacks?
- Content-Security-Policy
- Strict-Transport-Security
- X-Content-Type-Options
- X-Frame-Options
The Content-Security-Policy (CSP) header can be used to mitigate some types of XSS attacks by defining and controlling the sources from which certain types of content can be loaded.
How do you set a response header to indicate the content should be downloaded as a file?
- response.setHeader("Content-Disposition", "attachment; filename=example.txt");
- response.setHeader("Content-Encoding", "gzip");
- response.setHeader("Content-Transfer-Encoding", "binary");
- response.setHeader("Content-Type", "application/octet-stream");
To indicate that the content should be downloaded as a file, you can use the response.setHeader("Content-Disposition", "attachment; filename=example.txt"); method.
In the context of XSS prevention, what does the acronym CSP stand for?
- Content-Security-Policy
- Content-Security-Protocol
- Cookie-Security-Protocol
- Cross-Site Policy
In the context of XSS prevention, CSP stands for Content-Security-Policy. It is a security header that helps prevent XSS attacks by specifying which content can be executed on a web page.
Which JavaScript framework automatically escapes output to prevent XSS attacks?
- AngularJS
- React
- Vue.js
- jQuery
AngularJS automatically escapes output to prevent XSS attacks by default, helping developers build more secure web applications.
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.