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.
A web application requires users to log in for access. Which servlet feature should be implemented for this requirement?
- Filter
- HttpSession
- RequestDispatcher
- ServletContext
The HttpSession feature in servlets is commonly used for session management, allowing the tracking and management of user sessions, which is essential for implementing user logins in web applications.
How should an HTTP servlet respond to a request with an If-Modified-Since header older than the content's last modification date?
- Return a 200 OK response with the updated content
- Return a 304 Not Modified response
- Return a 403 Forbidden response
- Return a 500 Internal Server Error response
If the If-Modified-Since header indicates that the content hasn't been modified since the provided date, the servlet should return a 304 Not Modified response to indicate that the client's cached copy is still valid.
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.
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 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.
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.
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 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 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.
How are servlets used in conjunction with JSPs in a typical MVC application?
- Servlets and JSPs are interchangeable and can be used for any MVC role.
- Servlets and JSPs are not used together in MVC applications.
- Servlets handle business logic, and JSPs handle presentation logic.
- Servlets handle presentation logic, and JSPs handle controller logic.
In a typical MVC application, servlets are often used to handle business logic, while JSPs are used for presentation logic. Servlets and JSPs work together to achieve a separation of concerns in MVC.
In MVC architecture, how does a servlet interact with the model to process business logic?
- Servlets communicate with the model through JavaBeans or other business logic components.
- Servlets directly manipulate the model by interacting with the database.
- Servlets have no interaction with the model in MVC.
- Servlets use JSPs exclusively to handle business logic in MVC.
Servlets interact with the model by communicating through JavaBeans or other dedicated business logic components to process business logic in an MVC application.