A servlet needs to send a file to the client with a specific filename. Which response header should be set and by which method?
- Cache-Control, setHeader()
- Content-Disposition, setHeader()
- Content-Type, setContentType()
- Location, sendRedirect()
To send a file with a specific filename, the Content-Disposition header should be set using the setHeader() method in the HttpServletResponse.
To set the content type of the response in a servlet, which method is commonly used?
- addType(String type)
- appendContentType(String type)
- setContentType(String type)
- writeType(String type)
The setContentType(String type) method is commonly used to set the content type of the response in a servlet.
How are servlet mappings defined in the web application deployment descriptor?
Servlet mappings are defined using the element in the web application deployment descriptor (web.xml).
Servlet configuration parameters are accessed via the _________ method of the ServletConfig interface.
- getInitParameter()
- getParamValue()
- getParameter()
- readConfigParameter()
Servlet configuration parameters are accessed using the getInitParameter() method of the ServletConfig interface.
What object is primarily used to read form data in a servlet?
- FormReader
- HttpRequest
- HttpServletRequest
- ServletRequest
The HttpServletRequest object is primarily used to read form data in a servlet.
When handling file uploads in a servlet, the __________ utility class from Apache Commons FileUpload can be used.
- FileParser
- FileReader
- FileUpload
- FileWriter
When handling file uploads in a servlet, the FileUpload utility class from Apache Commons FileUpload is commonly used for parsing and processing multipart/form-data requests, including file uploads.
In a servlet, to get an array of all the values of a multi-valued parameter, use the __________ method.
- getArrayValues()
- getMultiValuedParameter()
- getParameterValues()
- retrieveParameterArray()
The getParameterValues() method in a servlet is used to get an array of all the values of a multi-valued parameter.
A developer needs to implement complex business logic with minimal HTML. Should they choose Servlet or JSP?
- Both
- JSP
- None of the above
- Servlet
When implementing complex business logic with minimal HTML, Servlets are more suitable as they provide better control over the business logic, separating it from the presentation layer. JSP is better for the view layer and is commonly used for creating dynamic web pages with embedded Java code.
A ________ request can be cached by the browser, whereas a ________ request cannot.
- GET; POST
- GET; PUT
- POST; DELETE
- POST; PUT
A GET request can be cached by the browser, whereas a POST request cannot be cached.
To handle JSON data in a POST request, a servlet may need to parse the request body using a _________.
- HttpServletRequest
- HttpServletResponse
- JsonObject
- JsonReader
In a POST request, to handle JSON data, a servlet may need to parse the request body using a JsonObject.