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Unit-1: The Servlet Technology Model
Q26. Which statements about the servlet lifecycle methods are true?
[Select all correct answers] - The init( ) method is called for every client request
- Since GET is the default HTTP method, HttpServlets.doGet( )method is calld even for other request types like POST, OPTIONS etc.
- The HttpServlets.doConnect( ) is empty implementation method.
- The destroy( ) method is guaranteed to be called only after any request processing.
- The service( )-doGet( )/( )do post( ) sequence is called for each request
.
Q27. Which of the following Servlet API interfaces provide utility methods for sending text
Or a binary stream to a client? [Select one correct answer]
A. ServletContext B.SevletRequest
C.HttpServletRequest D.ServletResponse
E.servlet
Q28. Consider the following URL:
http://www.tatamcgrawhill.com/servlet/UserInputServlet?name=kuna
Which method gets the value of name request parameter? [ Select all correct answers] - ServletRequest.getParameter(“name”);
- ServletRequest.getInitParameter(“kunal”);
- ServletsRequest.getParameterNames( )
- ServletRequest.getInitParameterNames( )
- ServletConfig.getInitParameter(“name”);
Q29. Which of the following methods would you use to retrieve request headers? [ Select all correct answer] - ServletRequest.getHeader(String HeaderName) B. HttpServeletsRequest.getHeader(String headerName)
- ServletRequest.getParameterNames( )
- HttpServletReequest.getHeaderValues(string headerName)
- HttpServletReequest.getIntHeader(string headerName)
Q30. Assume that you want to send a video file to users over the Web. Which class/interface
And method combination would you use to send the video? [Select one correct answer] A. HttpServletResponse.getVideoStream( )
B. HttpServletResponse.getWriter( )
C. ServletRequest.getBinaryStream( )
D.HttpServletRequest.getOutputStream( )
E.ServeletResponse.getOutputStream( )
Q31. Consider the following code fragment taken from a servlet: Public void doGet(httpServletRequest request, HttpServletResponse response)
throws ServletExceptions, IOException {
Response. setContentType(“text/html”);
PrintWriter out= response.getWriter( );
out.println<B> McGraw-Hill Education eBookshop</B>”);
out.fluesh( );
Response. sendRedirect (request.getQueryString( ));
} What will be the result of compiling and running above code snippet?
[Select one correct answer] - It’ll fail to compile because there’s no sendRedirect( ) method in
HttpServletResponse.
B. Compilation error because HttpServletResponse.sendRdirect( ) method accepts a URL. - An IllegalStateException will be thrown at runtime.
- No compilation error and successful output of “McGraw-Hill Education
eBookshop” in the browser window.
E. No compilation error, but the browser will render a blank window.
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