If a servlet generates dynamic content and you want to ensure it's not cached, which combination of response headers should be set?
- Cache-Control: no-store, Pragma: no-cache
- ETag, Cache-Control: no-cache
- Expires: 0, Cache-Control: must-revalidate
- Last-Modified, Cache-Control: private
To ensure dynamic content is not cached, the combination of Cache-Control: no-store and Pragma: no-cache headers should be set in the HttpServletResponse.
Which allows embedding Java code directly into the HTML code?
- Applet
- JSP
- JavaBean
- Servlet
JavaServer Pages (JSP) allows the embedding of Java code directly into HTML code, facilitating the creation of dynamic web pages with server-side logic.
Which interface provides the functionality to get initialization parameters in servlets?
- ServletConfig
- ServletContext
- ServletInitializer
- ServletParameters
The ServletConfig interface provides the functionality to get initialization parameters in servlets.
What is the default behavior of the service() method in the HttpServlet class?
- Forwarding the request to the init() method.
- Invoking the doGet() method.
- Invoking the doPost() method.
- Providing an HTTP 405 (Method Not Allowed) error.
The default behavior of the service() method in the HttpServlet class is to provide an HTTP 405 error (Method Not Allowed) response, indicating that the requested HTTP method is not supported.
What considerations should be made when handling large form data submissions in a servlet?
- Ensure the servlet has a large buffer size.
- Increase the maximum allowed request size.
- Use GET requests instead of POST requests.
- Use compression to reduce data size.
When handling large form data submissions in a servlet, considerations include increasing the maximum allowed request size, optimizing buffer sizes, and using compression to reduce data size.
The deployment descriptor file used to configure a servlet in a web application is named __________.
- servlet-config.xml
- web-app.xml
- web-config.xml
- web.xml
The deployment descriptor file used to configure a servlet in a web application is named web.xml.
What is the significance of the path attribute in a cookie?
- It defines the cookie's value
- It indicates the cookie's path
- It sets the cookie's domain
- It specifies the cookie's name
The path attribute in a cookie is significant as it indicates the URL path for which the cookie is valid. The client sends the cookie only if the path matches the requested URL.
In what scenario is it more appropriate to use RequestDispatcher over HttpServletResponse's sendRedirect?
- When maintaining the original URL is crucial
- When preserving client-side state is necessary
- When the resource is on a different server
- When the resource is on the same server
RequestDispatcher is more appropriate when you need to forward a request internally within the server, maintaining the original URL. This is especially important when you want to keep the original URL in the browser's address bar.
How does the servlet container handle HTTP headers when using RequestDispatcher's forward method?
- HTTP headers are discarded
- HTTP headers are duplicated
- HTTP headers are modified
- HTTP headers are preserved
When using RequestDispatcher's forward method, the servlet container discards the original response headers, allowing the forwarded resource to generate a new set of headers. This is important to avoid conflicts and ensure that the forwarded resource has control over the headers.
How can a servlet handle form data containing non-ASCII characters?
- Convert the data to ASCII
- Set the character encoding using setCharacterEncoding()
- This is not possible
- Use the getEncoding()
To handle form data containing non-ASCII characters, you should set the character encoding using the setCharacterEncoding(String encoding) method of the HttpServletRequest object.