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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.

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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

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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.

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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.

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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.

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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.


Answer 17


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

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Answer 16


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Answer 15


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Answer 14

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

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Answer 13


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Answer 12


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Answer 11


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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.

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Answer 9


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Answer 8


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Answer 7


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

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Answer 6


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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 ).

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Answer 4


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Answer 3

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

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Answer 2

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

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Answer 1


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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

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.


Questions & Answers

Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
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.
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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