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Back to Question 19

Answer 18

True.

Back to Question 18

Answer 17

False. While implementation of the Set interface may have some minor impact on the searching speed of a TreeSet object, the primary reason for the fast searching speed is the fact that theimplementation uses a tree structure.

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Answer 16

True. A TreeSet object will perform the search very rapidly with a time cost of only log(n) where n is the number of elements. On the other hand,for the same number of elements, because of a different underlying data structure, a search on an ArrayList object will probably require more time than a search on a TreeSet object. As the number of elements increases, thedifference in time cost between the two will also increase.

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Answer 15

False. The Collection interface does not declare a method named get . Rather, the get method is added to the List interface to define a more specialized form of collection.

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Answer 14

False. While an ArrayList object may contain duplicate values, the ArrayList object in Listing 1 was populated with the values contained in the TreeSet object, which does not allow duplicate values. Therefore, in this case, the ArrayList object may not contain duplicate values.

Back to Question 14

Answer 13

False. The code in Listing 1 instantiates an ArrayList object and populates it with the contents of the existing TreeSet object. As a result, we then have two different Collection objects of different actual types containing the same elements.

Back to Question 13

Answer 12

True.

Back to Question 12

Answer 11

True.

Back to Question 11

Answer 10

False. The program shown in Listing 1 instantiates a TreeSet object and populates it with approximately 2,000,000 elements.

Back to Question 10

Answer 9

True.

Back to Question 9

Answer 8

False. The manner in which the search will be performed will probably differ from one concrete implementation of the interface to the next. For example, a TreeSet object will perform the search very rapidly with a time cost of only log(n) where n is the number of elements. On the other hand, for the same numberof elements, because of a different underlying data structure, a search on an ArrayList object will probably require more time than a search on a TreeSet object. As the number of elements increases, the difference in time cost between the two will also increase.

Back to Question 8

Answer 7

True.

Back to Question 7

Answer 6

False.

The contract for the contains method requires that the method:

  • receives an incoming reference of type Object as a parameter
  • searches the collection looking for an element that matches the incoming reference
  • returns true if the collection on which the method is called contains the specified element and returns false otherwise.

Back to Question 6

Answer 5

True.

Back to Question 5

Answer 4

False. Iterator is not one of the concrete implementations.

Back to Question 4

Answer 3

True.

Back to Question 3

Answer 2

True.

Back to Question 2

Answer 1

True.

Back to Question 1

Miscellaneous

This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Java4040r Review
  • File: Java4040r.htm
  • Published: 11/25/13
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

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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