A web application needs to remember user preferences across sessions. Which approach using cookies is most suitable?
- HttpOnly Cookies
- Persistent Cookies
- Secure Cookies
- Session Cookies
Persistent Cookies are suitable for remembering user preferences across sessions as they persist even after the user closes the browser.
ServletContext is used for sharing information between:
- Browser and Server
- Client and Server
- JSP and Servlet
- Web components
ServletContext is used for sharing information between web components within the same web application, like servlets, JSP pages, and other resources.
How is ServletConfig initialized?
- Automatically by the container
- Using a configuration file
- Using constructor
- Using init() method
The ServletConfig is automatically initialized by the container. It provides configuration information to the servlet and can be obtained using the getServletConfig() method.
What is the difference between context parameters and initialization parameters in servlets?
- Context parameters are set at the application level, while initialization parameters are specific to a servlet.
- Context parameters are used for database connectivity, while initialization parameters are used for servlet configuration.
- Initialization parameters are set at the application level, while context parameters are specific to a servlet.
- Initialization parameters are used for database connectivity, while context parameters are used for servlet configuration.
Context parameters are set at the application level and are accessible to all servlets, while initialization parameters are specific to each servlet and are defined in the servlet's deployment descriptor (web.xml).
The response header 'Content-Disposition' with value 'attachment; filename="file.txt"' is set using the __________ method.
- addHeader()
- sendRedirect()
- setContentType()
- setHeader()
The setHeader() method is used to set response headers, including the 'Content-Disposition' for file downloads.
How can you securely send sensitive data from a client to a server in a web application?
- Encode data in Base64
- Send data in plain text
- Use HTTP with custom encryption
- Use HTTPS (SSL/TLS)
Sensitive data should be sent securely, and using HTTPS (SSL/TLS) ensures encrypted communication between the client and the server, providing a secure way to transmit sensitive information.
How are HTTP session cookies handled in servlets?
- Cookies are handled automatically by servlet containers.
- Cookies are managed using the Cookie class.
- Cookies are not supported in servlets.
- Cookies must be handled manually in the doGet() method.
In servlets, HTTP session cookies are typically managed using the Cookie class, allowing developers to handle cookie creation, retrieval, and manipulation programmatically.
The __________ method of the ServletContext interface is used to retrieve context parameters.
- contextParam()
- getContextParameter()
- getInitParameter()
- retrieveParameter()
The getInitParameter() method of the ServletContext interface is used to retrieve context parameters associated with the servlet's context.
Session tracking using ________ involves storing a small piece of information on the client's browser.
- Cookies
- Hidden Fields
- Session ID
- URL Rewriting
Session tracking using Cookies involves storing a small piece of information on the client's browser.
To access the MIME type of a file, use the __________ method of ServletContext.
- analyzeMimeType()
- fetchMimeType()
- getMimeType()
- retrieveMimeType()
To access the MIME type of a file, use the getMimeType() method of ServletContext.