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True or False? The program shown in Listing 1 compares the search speed of the ArrayList class and the TreeSet class.

Answer 9

Question 10

True or False? The program shown in Listing 1 instantiates a TreeSet object and populates it with approximately 10,000,000 elements.

Answer 10

Question 11

True or False? Because the add method of a Set object rejects duplicate elements, there may be fewer than 2,000,000 elements in the TreeSet object in Listing 1 after it is populated, depending on how many of the random values are duplicates.

Answer 11

Question 12

True or False? One of the capabilities of the Collection Framework is to create a new Collection object and populate it with the contents of an existing Collection object of a different (or the same) actual type.

Answer 12

Question 13

True or False? The code in Listing 1 instantiates an ArrayList object and populates it with exactly 2,000,000 random values that are different from the random valuescontained in the TreeSet object.

Answer 13

Question 14

True or False? The ArrayList object in Listing 1 may contain duplicate values.

Answer 14

Question 15

True or False? Listing 1 calls the get method on the ArrayList object. The ArrayList class implements the List interface. The get method of the List interface is inherited from the Collection interface.

Answer 15

Question 16

True or False? In general, the time required for the contains method to find a value in a TreeSet object is less than the time required for the contains method to find a value in an ArrayList object.

Answer 16

Question 17

True or False? The very fast searching speed of a TreeSet object results from the implementation of the Set interface.

Answer 17

Question 18

True or False? Polymorphic behavior means that the actual method that is executed on a Collection object is the appropriate method for that type of object regardless of the actual type (class) of the reference to the object.

Answer 18

Question 19

True or False? Some of the implementations of the Java Collections Framework maintain their elements in a random order, and other implementations maintaintheir elements in a sorted order. The sorting algorithms used to maintain the order of the collections in the Collections Framework are exposed in the sameway that the search algorithm is exposed (via the contains method).

Answer 19

Question 20

True or False? The interfaces in the Collections Framework make it possible to manipulate the contents of collections in a manner that is independent of the underlying implementation of each collection.

Answer 20

Listings

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Answers

Answer 20

True.

Back to Question 20

Answer 19

False. The sorting algorithms used to maintain the order of the collections in the Collections Framework are not exposed in the way that the searchalgorithm is exposed (via the contains method). Rather, the sorting algorithms are implicit in those implementations that need them, and are absent from thoseimplementations that don't need them.

Questions & Answers

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
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
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
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor 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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