*CS506 Web Design and Development*
*Quiz No.2 June 13, 2012*
Which of the following approch is used to create threads in java?
Inheritance]
Interface
*Both inheriance and interface (right Answer)*
None of these* *
Why we use RequestDispatcher to forward a request to another
resource(servlet, html, jsp), instead of using a sendRedirect()?
sendRedirect() is not supported in servlet API.
RequestDispatcher is not supported in servlet API.
RequestDispatcher is efficient and allows the server to maintain request
status.
*None of these (right Answer)*
* *
* *
Which of the following method of an Applet is called every time when page
is minimized?
start()
init()
*stop()(right Answer)*
destroy()
Which of the following statement is true regarding paintComponent() method?
It tells any components contained by this component to paint themselves.
It tells the component to paint its border.
*It first paints the background and then performs custom painting. (right
Answer)*
It first performs custom painting and then paints the background.
Which of the following is NOT true for an Applet?
A small program written in Java and included in a HTML page.
It is independent of the operating system on which it runs.
*They have no access to the client’s file system. (right Answer)*
An applet is a Panel that allows interaction with a Java program
Which of the following syntax is used to get DataBaseMetaData object?
ResultSetMetaData md = con.getMetaData();
// where con is Connection object
*ResultSetMetaData md = rs.getMetaData();*
*// where rs is ResultSet object (right Answer)*
ResultSetMetaData md = st.getMetaData();
// where st is Statement object
ResultSet md = rs.getMetaData();
// where rs is ResultSetMetaDta object
Why we use RequestDispatcher to forward a request to another
resource(servlet, html, jsp), instead of using a sendRedirect()?
sendRedirect() is not supported in servlet API.
RequestDispatcher is not supported in servlet API.
RequestDispatcher is efficient and allows the server to maintain request
status.
*None of these (right Answer)*
getColumnCount() is a method of ________ object.
Statement
*ResultSet(right Answer)*
ResultSetMetaData
DataBaseMetaData
doGet() and doPost() receive ServletRequest and ServletResponse objects as
an arguments which facilitate interaction between the client and the
server.
*True (right Answer)*
False
Which of the following method is used to move the cursor to given row
number?
absolute(int);
absolute();
moveToInsertRow(int);
insertRow();
Which of the following method of an Applet is called every time when page
is minimized?
start()
init()
*stop()(right Answer)*
destroy()
HTML form data can be processed by JSP
*TRUE( right Answer)*
FALSE
From the following methods, which method cannot be overridden in the JSP
page
*_jspService() (right Answer)*
jspDestroy()
jspInit()
None of these
Which of the following object is used for sharing resources among different
servlets of same application?
ServletConfig
ServletRequest
ServletResponse
*Servlet Context (right Answer)*
getParameters() method returns an array of strings containing the values
for a specified servlet parameter.
TRUE
*FALSE(right Answer)*
* *
* *
Socket is a ___________ communication channel between hosts.
uni-directional
*bi-directional (right Answer)*
multi-directional
None of these
setAttribute(String, Object) associates a ----------with a name.
None of these
Object
String
Value
Packages are the way to organize files into different
-------------according to their functionality, usability as well as
category they should belong to.
*Directories (right Answer)*
Folders
Libraries
None of these
When JSP page compiled, it is translated into?
Applet
Application
*Servlet (right Answer)*
Web Browser
From the following which ID is transmitted between the client and the server
*Session ID (right Answer)*
Network ID
Server ID
None of these
To define the error page in JSP we use following tag?
exception-type
error-type
*error-page (right Answer)*
exception-page
Which of the following is called Іpure abstract classІ?
*Concrete Class (right Answer)*
Wrapper Class
Interface
Abstract class with no abstract method
The relationship between class and interface is called ____________
’Is a’ relationship
’Has a’ relationship
*’Responds to’ relationship (right Answer)*
None of the above given
Which of the following statement object is used to execute simple SQL
statement?
Statement
PreparedStatement
CallableStatement
*None of given* *(right Answer)*
Which of the following function will be used to register even handler with
events generators (button)?
addAction()
*AddActionListener() (right Answer)*
AddKListener()
ActionListener()
WindowsListener interface contains ___________ methods
Four
Six
Seven
*Eight (right Answer)*
* *
Java defines _____ for the listener interfaces having more than one vent
handling methods.
Wrapper Classes
Abstract Classes
Concrete Classes
*Adapter Classes (right Answer)*
Which of the following statement object is used to execute store procedures?
Statement
PreparedStatment
*CallableStatement (right Answer)*
None of the above given
Which of the following object is passed as an argument to paintComponent()
method?
Image object
*Jpanel object (right Answer)*
JFrame onject
Graphic object
previous() is a method of __________ object.
Statement
ResultSet
ResultSetMetaData
Connection
Which of the following problem occurs with lower priority threads?
Race condition
*Starvation (right Answer)*
Average waiting time
Process death
Servlets are used to
Create graphics
*Provide dynamic web contents which extend web servers (right Answer)*
Develop applets
Create GUI
Which of the following is NOT a part of HTTP request?
Request method
URI
*Status code (right Answer)*
Header fields
Which of the following object is used for sharing resources among different
servlets of same application?
ServletConfig
ServletRequest
ServletResponse
*ServletContext (right Answer)*
* *
Which of the following method needs to ovveride while handling threads in
java?
init()
start()
*run()(right Answer)*
runnable()
Which of the following method is called only once during life cycle of
Servlet
Service()
*Init()(right Answer)*
Destroy()
Start()
Which of the following method needs to override while handling threads in
java?
Select correct option:
*init()right Answer)*
start()
run()
runnable()
isReadOnly() is a method of _________ object.
ResultSet
ResultSetMetaData
DataBaseMetaData
Connection
Which of the following syntax is used to get DataBaseMetaData object?
*DataBaseMetaData md = rs.getMetaData();*
*// where rs is ResultSet object (right Answer)*
DataBaseMetaData md = st.getMetaData();
// where st is Statement object
DataBaseMetaData md = con.getMetaData();
// where con is Connection object
DataBaseMetaData md = rsmd.getMetaData();
// where rsmd is ResultSetMetaData object
Interface of HttpServletResponse extends class ServletResponse
False
*True (right Answer)*
Which of the following method is used to determine whether a database is
read only or not?
isReadonly()
isReadOnly()
isreadonly()
IsReadOnly()
Servlet mapping is defined in ________
servlet
*web.xml (right Answer)*
html
JSP
Which of the following is NOT a web technoloy of Java?
Servlet
JSP
ASP
*JSF (right Answer)*
Which of the following is NOT true about HTTP?
HTTP is a stateless protocol
HTTP is a request response communication model
*HTTP maintains user session between successive requests. (right Answer)*
HTTP has no built-in state management between successive requests.
getrequest() method gets information from a client and postrequest() method
posts data to a client.
*True (right Answer)*
False
getAttribute(String) extracts----------- stored value from a session object
Subsequently
None of these
*Previously (right Answer)*
Currently
getParameters() method returns an array of strings containing the values
for a specified servlet parameter.
True
*False (right Answer)*
* *
To destroy the session in Servlet we use?
session.destroy()
session.invalidate()
*session.end()(right Answer)*
session.Kill()
From the following which session tracking technique is used when new
session is started?
Cookies
URL Rewriting
*Both Cookies and URL Rewriting (right Answer)*
None of these
HttpSession stores session information in
File system of client
File system of server
*A cookie (right Answer)*
A session object
HttpServletResponse object is created when web server executes the servlet.
This object is passes to the servlet service method which passes it to
doGet () or doPost().
*True (right Answer)*
False
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