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Answer 9

Question 10

True or False? A TreeSet object can contain duplicate elements.

Answer 10

Question 11

True or False? A TreeSet object is not a SortedSet.

Answer 11

Question 12

True or False? A TreeSet object is a Collection.

Answer 12

Question 13

True or False? Because an object of the TreeSet class is a Collection , a reference to such an object can be passed to any method that requires an incoming parameter of type Collection . The receiving method can call any method on that reference that is declared in the Collection interface .

Answer 13

Question 14

True or False? The behavior of the fillIt method in Listing 1 is to add elements to the incoming Collection object without regard for the actual type of the object (the class from which the object was instantiated).

Answer 14

Question 15

True or False? In Listing 1 , a reference to an object of type Button (see the Java documentation) could be passed as a parameter to the fillIt method.

Answer 15

Question 16

True or False? In Listing 1 , the fillIt method can call the add method on the incoming object with confidence that the behavior of the add method will be appropriate for the specific type of object involved.

Answer 16

Question 17

True or False? In Listing 1 , when the fillIt method returns, the TreeSet object contains five elements.

Answer 17

Question 18

True or False? In Listing 1 , when the fillIt method returns, the TreeSet object contains four (not five) elements with no duplicates. Each element is a reference to an object of type Integer . Those references are maintained in such a way as to make them accessible in descending order, basedon the int values encapsulated in each of the Integer objects.

Answer 18

Question 19

True or False? The call to the iterator method on any Collection object returns an instance of a class that implements the Iterator interface.

Answer 19

Question 20

True or False? An Iterator object can be used to traverse a Collection object, gaining access to each element in order .

Answer 20

Question 21

True or False? The concept of in order means the same thing for all Collection objects.

Answer 21

Question 22

True or False?

The Iterator interface declares three methods:

  • hasNext()
  • next()
  • remove()

Answer 22

Question 23

True or False? The Iterator object associated with a particular Collection object provides access to the contents of the collection in a very specific way.

Answer 23

Question 24

True or False? The while loop in the Worker class in Listing 1 traverses the collection

  • accessing each of the object's elements in succession, and
  • displaying the value encapsulated in the object referred to by each element.

Answer 24

Question 25

True or False? Listing 1 causes the following text to appear on the screen:


Answer 25


  • Listing 1 . Used with several different questions.

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.

Questions & Answers

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
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
characteristics of micro business
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 ?
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.
what is the actual application of fullerenes nowadays?
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.
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.
is Bucky paper clear?
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.
Do you know which machine is used to that process?
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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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