Quiz
Questões - The Servlet's Environment
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Fragen in diesem Quiz (20)
1Why do the client and server need a unique session id for conversations?
- ABecause HTTP is a stateful protocol.
- BBecause HTTP is a stateless protocol
- CFTP is a stateful protocol
- DNone of the above
2What is the method in the HttpSession interface to know if a session is new or not?
- AgetSession();
- BisSessionNew();
- CsessionNew();
- DisNew();
3What is the method in the HttpServletRequest interface to know if a session exists or not?
- AgetSession(boolean);
- BsessionExists();
- CgetSession();
- DdoesSessionExists()
4URL encoding is done by:
- AHttpServletRequest
- BServletContext
- CServletRequest
- DHttpServletResponse
5What type of session tracking is used for static pages?
- ACookies
- BURL rewriting
- CBoth Cookies and URL rewriting
- DNone of the mentioned
6What is wrong with the following line of code?
String sessid = request.getParameter("jsessionid");- A"jsessionid" is not a parameter that can be passed.
- BNothing is wrong with this code.
- CThe getParameter should take an object as its parameter.
- DThe code should be re-written as:
String sessid = request.getAttribute("jsessionid");
7In the setMaxInactiveInterval() method in the HttpSession interface, the parameter 'interval' specified below is represented in:
void setMaxInactiveInterval(int interval);- AHours
- BMinutes
- CSeconds
- DMilliseconds
8When you set the session timeout in the deployment descriptor as in the following example, the timeouts are specified in...
- AHours
- BMinutes
- CSeconds
- DMilliseconds
9Consider the code:
What will be the output of the following code?
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.*;
import javax.servlet.http.*;
public class SampleServlet extends HttpServlet{
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException{
response.setContentType("text/html");
PrintWriter out=response.getWriter();
HttpSession sess1=request.getSession();
sess1.invalidate();
if(sess1.isNew()){
System.out.println("A new session has been created");
}else{
System.out.println("The session cannot be created");
}
}
}
- AThe message "A new session has been created" is output.
- BThe message "The session cannot be created" is output.
- CCompile error.
- DIllegalStateException
10Consider the following code:
Cookie c = new Cookie("user",name);
c.setMaxAge(-10);
What happens when the above code is implemented?- AThe Cookie lives for 10 minutes.
- BThe Cookie will be erased once the web browser quits.
- CThe Cookie lives for 10 seconds.
- DThe Cookie is deleted.
11In a distributed environment, there is ________ HttpSession object for a given session ID per web application inspite of the number of VMs it is distributed across.
- AOne
- BTwo
- CDepends on the number of VMs it is present on
- DNone of the above
12What are the methods in the HttpSessionActivationListener interface?
- AsessionWillActivate(HttpSessionEvent e) and sessionDidPassivate(HttpSessionEvent e)
- BsessionDidActivate(HttpSessionEvent e) and sessionWillPassivate(HttpSessionEvent e)
- CsessionActivate(HttpSessionEvent e) and sessionPassivate(HttpSessionEvent e)
- DsessionWillActivated(HttpSessionEvent e) and sessionDidPassivated(HttpSessionEvent e)
13Consider this code:
public class MySessionAttributeListener implements HttpSessionAttributeListener{
public void attributeAdded(HttpSessionAttributeEvent e){
System.out.println("Attribute added");
}
public void attributeRemoved(HttpSessionAttributeEvent e){
System.out.println("Attribute removed");
}
public void attributeReplaced(HttpSessionAttributeEvent e){
}
}- ACode is perfectely fine.
- BThe HttpSessionAttributeListener has one more method that has to be implemented.
- CThe event has to be HttpSessionBindingEvent.
- DThe "attributeReplaced()" method should not be present.
14Consider the listener class:
public class MySessionBindingListener implements HttpSessionBindingListener{
public void valueBound(HttpSessionBindingEvent e){
}
public void valueUnbound(HttpSessionBindingEvent e){
}
}
And the corresponding Deployment Descriptor:
< web-app >
-----------------
----------
< listener >
< listener-class> MySessionBindingListener < / listener-class >
< / listener >
What is wrong with this code?- ANothing is wrong with this code.
- BThe HttpSessionBindingListener has to implement one more method.
- CThe listener class is configured wrongly.
- DThe HttpSessionBindingListener need not be configured in the Deployment Descriptor.
15What is the HttpSessionActivationListener used for?
- ATo know how many concurrent users are there.
- BTo know when session attributes are added, removed or replaced in a session.
- CTo let attributes know when they are moved from one VM to another as part of a session.
- DNone of the options.
16List the four concepts in servlet security.
Select four options.- AAuthentication
- BEavesdropping
- CAuthorization
- DConfidentiality
- EFoilling
- FData integrity
17In a web application, it is better to handle security declaratively or programmatically?
- ADeclaratively
- BProgrammatically
18Once the user makes a request for a constrained resource, the user is asked to enter the name and password
- AAuthentication
- BAutorization
- CConfidentiality
- DData integrity
19The Container checks to see if the user is in the required role to access the resource.
This is an example of:- AAuthentication.
- BAuthorization.
- CConfidentiality.
- DData integrity.
20How many types of authentication are there?
- A2
- B3
- C4
- D5
Informationen
- Beschreibung
- Concursos Públicos Desenvolvimento de Software (OCEJWCD 6 ONLINE COURSE) Quiz am Questões - The Servlet's Environment, erstellt von Luis Felipe Guariento am 19/02/2018.
- Sprache
- Português
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