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This module contains review questions and answers keyed to the module titled Java4140: The Comparator Interface, Part 6,

Revised: Fri Apr 08 11:14:25 CDT 2016

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This module is one in a collection of modules on Java Collections designed for teaching ITSE2321 - Object-Oriented Programming (Java) at Austin Community College in Austin, TX.

This module contains review questions and answers keyed to the module titled Java4140: The Comparator Interface, Part 6 .

Once you study that module, you should be able to answer the review questions in this module.

The questions and the answers in this module are connected by hyperlinks to make it easy for you to navigate from the question to the answer and back again.


Question 1 .

True or False? The reverseOrder method of the Collections class returns a reference to an object of type String .

Answer 1

Question 2

True or False? The reverse method of the Collections class returns a reference to an object of the interface type List .

Answer 2

Question 3

True or False? A Comparator created by the reverseOrder method of the Collections class can be used to sort a list into reverse natural order .

Answer 3

Question 4

What output is produced by the program shown in Listing 1 (select one or more answers) ?

  • Compiler Error
  • Runtime Error
  • Joe Bill Tom JOE BILL TOM
  • BILL Bill JOE Joe TOM Tom
  • TOM BILL JOE Tom Bill Joe
  • Joe Bill Tom JOE TOM BILL
  • Tom TOM Joe JOE Bill BILL
  • Joe Bill Tom
  • None of the above.

Answer 4

Question 5

True or False? The ArrayList class implements both the Collection interface and the List interface. Therefore, it is both a collection and a list , and adheres to the contracts and stipulations of both interfaces.

Answer 5

Question 6

True or False? The reverseOrder method returns a Comparator that imposes the reverse of the natural ordering on a collection of objects that implement the Comparable interface.

Answer 6

Question 7

True or False? The natural ordering of the elements in a collection is the ordering imposed by the objects' own compare method.

Answer 7

Question 8

True or False? All Java objects have a natural ordering .

Answer 8

Question 9

True or False? The Comparator object returned by the reverseOrder method can be used to impose a reverse natural order on any collection of objects that implement the Comparable interface.

Answer 9

Question 10

True or False? If you don't understand interfaces, they can't possibly understand Java.

Answer 10

Question 11

True or False? A SortedMap is a Map that maintains its entries in ascending order, sorted according to the values' natural ordering, or according to a Comparator provided at the time of the SortedMap creation.

Answer 11

Question 12

True or False? An object of type Map is an object that maps keys to values. Such an object can contain duplicate keys but cannot containduplicate values

Answer 12

Question 13

True or False? An object of type Deque allows elements to be inserted, retrieved, and removed at both ends.

Questions & Answers

How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
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.
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
for teaching engĺish at school how nano technology help us
How can I make nanorobot?
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
how can I make nanorobot?
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?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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