In a scenario where sensitive data is transmitted, which protocol should a servlet use to ensure data security?
- FTP
- HTTP
- HTTPS
- SMTP
For transmitting sensitive data, such as during user logins, servlets should use HTTPS (HTTP Secure) to ensure data security through encryption.
For an application that needs to authenticate users based on roles, what is the best approach to implement this in servlets?
- Container-Managed Security
- Custom Authentication Logic
- Database Authentication
- SSL Authentication
The best approach for implementing user authentication based on roles in servlets is to use Container-Managed Security, which is configured in the deployment descriptor (web.xml) and utilizes the container's security mechanisms.
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.
Servlets in an MVC framework typically receive user input through __________.
- cookies
- hidden fields
- request parameters
- session attributes
Servlets in an MVC framework typically receive user input through request parameters, which are data sent by the client as part of the HTTP request and can be accessed by the servlet.
The __________ pattern used in MVC frameworks centralizes request handling in a single servlet.
- Adapter
- Front Controller
- Observer
- Strategy
The Front Controller pattern used in MVC frameworks centralizes request handling in a single servlet.
Which component in the MVC framework is typically implemented using servlets?
- Controller
- DAO
- Model
- View
In the MVC framework, servlets are typically used to implement the Controller component, responsible for handling user input, processing requests, and interacting with the model and view components.