SCWCD
Question 21
What will be the output of the following JSP code?
<html><body> <%! int a = 20; %> <% int a = 10; %> <%! int b = 30; %> Now b = <%= b * a %> </body></html>
A Now b = 300
B Now b = 600
C The code will not compile
D Now b = 30
E Now b = 0
Answer
A
In the first declaration <%! int a = 20; %>, the variable "a" will be declared as an instance variable. In the second declaration <% int a = 10; %>, the variable "a" will be declared as a local variable inside the service method. And at the time of multiplication it will use the local variable.
Question 22
Consider the following code snippet of servlet code:
public void doGet (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
String value = getValue ();
if (value == null) response.sendError (HttpServletResponse.SC_NOT_FOUND, "Failed");
response.sendRedirect ("test.jsp");
}
If the getValue () method returns null , which of the following statements are true?
A The code will work without any errors or exceptions B An IllegalStateException will be thrown
C An IOException will be thrown
D A NullPointerException will be thrown
Answer
BSince the response is already committed by calling the sendError() , we cannot redirect it once again.
Question 23
Which of the following can be used to configure the JSP container to ignore EL expressions?
A <%@ page isELIgnored="true" %>
B <%@ page isELIgnored="false" %>
C <%@ import isELIgnored="false" %>
D None of the above.
Answer
D
Configuring the <el-ignored> tag inside the DD is the only way to ignore EL expressions. There was a isELIgnored attribute for page directive in the 2.0 draft version. But it is removed from the final version.
Question 24
What is the default scope for <jsp:useBean>
A application
B session
C page
D request
Answer
C
The default scope attribute for useBean is page.
Question 25
15 Which of the following is the proper way to include java.util package in your jsp page?
A <%@page:import package="java.util">
B <%@ page import = "java.util.*" %>
C <%= import java.util.*; %>
D <%@ page import="java.util.*" %>
Answer
D
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