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Answer 8

Question 9

True or False? In Listing 1 , a method named add is called to populate the TreeSet collection and the ArrayList collection with the same values in the same order.

Answer 9

Question 10

True or False? Given that in Listing 1 , a method named add is called to populate the TreeSet collection and the ArrayList collection with the same values in the same order, the two collections end up containing the same values

Answer 10

Question 11

True or False? Given that in Listing 1 , the TreeSet object filters out duplicate values, the TreeSet object and the ArrayList object end up containing all of the other values in the same order.

Answer 11

Question 12

True or False? In Listing 1 , the fillIt method receives an incoming parameter that is a reference to a collection object. The fillIt method calls the add method on the incoming reference several times in succession to add elements to the collection, being careful to satisfy thespecial requirements of the type of collection object.

Answer 12

Question 13

True or False? In Listing 1 , the fillIt method calls the same method name ( add ) on each of the collection objects. (They are physically different methods with the same name.) . The behavior of one add method is different from the behavior of the other add method. In both cases, the behavior is appropriate for the underlying data structure. The actual type of the underlyingdata structure isn't known to the fillIt method.

Answer 13

Question 14

True or False? The inheritance structure of the core collection interfaces in the Java Collections Framework is shown below. Indentation is used to indicatethe parent-child relationships among the interfaces.

  • Collection
    • Set
      • SortedSet
    • List
    • Queue
    • Deque
  • Map
    • SortedMap

Answer 14

Question 15

True or False? Every class that implements an interface in the tree rooted in Collection is required to support all of the methods (operations) declared in the Collection interface.

Answer 15

Listings

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Answers

Answer 15

False. Every class that implements an interface in the tree rooted in Collection is not required to support all of the methods (operations) declared in the Collection interface.

Rather, some of the methods in the Collection interface are designated as "optional operation" in the documentation.

If a given implementation doesn't support a specific method, it must throw an UnsupportedOperationException . The author of the implementation is responsible for providing documentation that identifies the optional operationsthat the implementation does and does not support.

Back to Question 15

Answer 14

True.

Back to Question 14

Answer 13

True.

Back to Question 13

Answer 12

False. In Listing 1 , the fillIt method receives an incoming parameter that is a reference to a collection object. The fillIt method calls the add method on the incoming reference several times in succession to add elements to the collection, without regard for the actual typeor underlying implementation of the collection object. (As written, the fillIt method has no way of knowing the actual type or underlying implementation of the collection object.)

Back to Question 12

Answer 11

False. By implementing the SortedSet interface, the TreeSet object is required to present its contents to an iterator in ascending natural order. The ArrayList object is not subject to such a contract. Therefore, the TreeSet object presents its contents to the iterator as 1234 (with no duplicate elements) while the ArrayList object presents its contents to the iterator as 44321, which is the same orderthat the values were added to the object.

Back to Question 11

Answer 10

False. The TreeSet class implements the SortedSet interface. SortedSet is a sub interface of Set . One of the characteristics of a Set object is that it doesn't allow duplicate elements. The ArrayList class is not subject to such a contract. Therefore, the ArrayList object ends up containing duplicate copies of the value 4 while the TreeSet object ends up with no duplicates.

Back to Question 10

Answer 9

True.

Back to Question 9

Answer 8

False. Given that both the TreeSet class and the ArrayList class inherit an abstract method named add from the Collection interface, each class is required to define a concrete version of the add method but those two methods are not required to exhibit the same behavior. The behavior of the add method for each class should be appropriate for the type of object instantiatedfrom the class.

Back to Question 8

Answer 7

True.

Back to Question 7

Answer 6

False. Both the TreeSet class and the ArrayList class implement the Collection interface.

Back to Question 6

Answer 5

True.

Back to Question 5

Answer 4

True.

Back to Question 4

Answer 3

False. There is more than one way to implement a list. Two common ways involve arrays and linked structures.

Back to Question 3

Answer 2

True.

Back to Question 2

Answer 1

1234 44321

Back to Question 1

Miscellaneous

This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Java4050r: Review
  • File: Java4050r.htm
  • Published: 11/30/13
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

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 ?
s.
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.
Harper
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
what is nano technology
Sravani Reply
what is system testing?
AMJAD
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
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
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
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
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
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
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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Berger describes sociologists as concerned with
Mueller Reply
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Source:  OpenStax, Object-oriented programming (oop) with java. OpenStax CNX. Jun 29, 2016 Download for free at https://legacy.cnx.org/content/col11441/1.201
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