The method __________ of the HttpServletRequest is used to read binary data from a form input.
- getBinaryData()
- getInputStream()
- readBinaryData()
- readFormData()
The getInputStream() method of the HttpServletRequest is used to read binary data from a form input.
When using RequestDispatcher's forward method, changes to the response _________ affect the final output.
- always
- may
- will
- will not
When using RequestDispatcher's forward method, changes to the response will not affect the final output, as the forward method transfers control without changing the response.
In which method of a servlet are most of the resources like threads, database connections, etc., released?
- destroy()
- doGet()
- init()
- service()
The destroy() method is called when a servlet is being removed from service, and it is used to release resources like threads and database connections.
To set multiple values for the same header, use the __________ method in HttpServletResponse.
- addHeader()
- appendHeader()
- setHeader()
- setMultipleValuesHeader()
The addHeader() method in HttpServletResponse is used to add multiple values for the same header, allowing for flexibility in handling headers with multiple values.
A servlet needs to read its own initialization parameters and also share a database connection pool. Which combination of objects should it use?
- getInitParameter() and ServletContext
- getServletConfig() and getServletContext()
- getServletContext() and getInitParameter()
- getServletContext() and getInitParameter()
To read its own initialization parameters, a servlet should use getInitParameter(). To share a database connection pool, it should use the ServletContext, which is accessible via getServletContext().
The __________ method is called to allow the servlet to respond to a request.
- destroy()
- doGet()
- init()
- service()
The service() method is called to allow the servlet to respond to a request. It handles the actual processing of the request.
If a servlet needs to access a shared resource specified in the web application's context parameters, which approach should be used?
- Access the shared resource through the HttpSession object.
- Directly access the shared resource using the File class.
- Use a global variable within the servlet to store the shared resource.
- Utilize the ServletContext to retrieve the shared resource using getInitParameter().
To access a shared resource specified in the web application's context parameters, a servlet should use the ServletContext and the getInitParameter() method. This ensures proper retrieval of the shared resource.
What is session tracking in the context of servlets?
- Handling HTTP requests
- Maintaining user sessions
- Managing servlet lifecycle
- Processing form data
Session tracking in servlets involves maintaining user sessions, allowing the server to recognize and remember users across multiple requests, usually achieved through mechanisms like cookies or URL rewriting.
How does an HTTP servlet handle multipart/form-data requests?
- It accesses the data using request.getParts() method.
- It employs the request.getInputStream() method.
- It uses the HttpServletRequest.getParameter() method.
- It utilizes the MultipartRequest class.
Handling multipart/form-data requests in an HTTP servlet involves using the request.getParts() method to access the various parts of the request, allowing extraction of file uploads and other data.
Which Java method is used to add a cookie to the response object?
- addCookie()
- createCookie()
- insertCookie()
- setCookie()
The addCookie() method is used in Java to add a cookie to the response object and send it to the client.