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Question 11

True or False?

Overriding the doGet method to support the GET command also automatically supports the HTTP HEAD command.

Go to answer 11

Question 12

True or False?

The fundamental purpose of the GET command makes it possible for the client to get something from the server. When you override the doGet method, you should, as a minimum:

  • Read data from the request
  • Construct the proper headers in the response
  • Gain access to either the writer or the output stream (depending on whether the material to be returned is text or binary data)
  • Write the response data

Go to answer 12

Question 13

True or False?

The headers that you create in your overridden doGet method should include content type and encoding. The content type must be set beforethe writer is accessed. The setContentType method of the response object can be called to set the content type. The getWriter method of the response object can be called to get access to the output stream.

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Question 14

True or False?

The class definition for an HTTP servlet extends the JavaHttpServlet class.

Go to answer 14

Question 15

True or False?

Servlets typically process requests from multiple clients concurrently in a multithreaded manner. However, it is possible to write servlets that arerestricted to single-threaded operation by implementing the SingleThreadModel interface.

Go to answer 15

Question 16

True or False?

When writing a servlet for multi-threaded operation, you should use the fewest possible number of instance variables, and synchronize access to them if you use them.

Go to answer 16

Question 17

True or False?

For servlets that extend the HttpServlet class, the following methods may be overridden to cause your servlet to interact with theclient.

  • doGet - for handling GET, conditional GET and HEAD requests
  • doPost - for handling POST requests
  • doPut - for handling PUT requests
  • doDelete - for handling DELETE requests
  • doTerminate - for terminating the servlet and returning control to the browser

Go to answer 17

What is the meaning of the following two images?

These images were inserted here simply to insert some space between the questions and the answers to keep them from being visible on the screen at thesame time.

Spacer image of a rabbit and a penguin.

This image was also inserted for the purpose of inserting space between the questions and the answers.

Spacer image of a penguin and some houses.

Answers

Answer 17

False.

For servlets that extend the HttpServlet class, the following four methods may be overridden to cause your servlet to interact withthe client.

  • doGet - for handling GET, conditional GET and HEAD requests
  • doPost - for handling POST requests
  • doPut - for handling PUT requests
  • doDelete - for handling DELETE requests

Go back to Question 17

Answer 16

True.

Go back to Question 16

Answer 15

True.

Go back to Question 15

Answer 14

False. The class definition for an HTTP servlet extends the HttpServlet class.

Go back to Question 14

Answer 13

True.

Go back to Question 13

Answer 12

True.

Go back to Question 12

Answer 11

True.

Go back to Question 11

Answer 10

False. The doGet method corresponds to the HTTP GET command. If you don't override the method, the default implementation reports an HTTP BAD_REQUEST error when the browser sends a GET command.

Go back to Question 10

Answer 9

True.

Go back to Question 9

Answer 8

True.

Go back to Question 8

Answer 7

False.

Object references of the following types are passed to a servlet when it called by a client:

  • ServletRequest - encapsulates the communication from the client to the server.
  • ServletResponse - encapsulates the communication from the servlet back to the client

Go back to Question 7

Answer 6

True.

Go back to Question 6

Answer 5

False. All servlets must implement the Servlet interface. You can implement it directly. However, it is more common to implement itindirectly by extending a class that implements the interface (such as HttpServlet ).

Go back to Question 5

Answer 4

True.

Go back to Question 4

Answer 3

False. The use of servlets is not restricted to HTTP servers.

Go back to Question 3

Answer 2

False. You must run your servlet under the control of a Java-enabled server program. Not all HTTP servers support Java servlets.

Go back to Question 2

Answer 1

True.

Go back to Question 1

Miscellaneous

This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Java4535r-Review
  • File: Java4535r.htm
  • Published: 03/10/14
  • Revised 12/26/14
Disclaimers:

Financial : Although the Connexions site makes it possible for you to download aPDF file for this module at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, youshould be aware that some of the HTML elements in this module may not translate well into PDF.

I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version ofthe module.

In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale onAmazon.com showing me as the author. I neither receive compensation for those sales nor do I know who does receive compensation. If youpurchase such a book, please be aware that it is a copy of a module that is freely available on cnx.org and that it was made andpublished without my prior knowledge.

Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.

-end-

Questions & Answers

anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Mueller Reply
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