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This module contains review questions and answers keyed to the module titled Java4070: The Comparable Interface, Part 1.

Revised: Wed Apr 06 21:57:52 CDT 2016

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Table of contents

Preface

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 Java4070: The Comparable Interface, Part 1 .

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.

Questions

Question 1 .

True or False? The fact that the location of each element can be controlled in a List is what causes a List to be an unordered collection.

Answer 1

Question 2

True or False? It is not necessary for objects to implement the Comparable interface to make them eligible for inclusion in a List .

Answer 2

Question 3

True or False? It is not necessary for objects to implement the Comparable interface to make them eligible for inclusion in a SortedSet .

Answer 3

Question 4

What output is produced by the program shown in Listing 1 ?

  • Compiler Error
  • 44321
  • 4321
  • 1234
  • 12344

Answer 4

Question 5

True or False? The Collection interface declares the following overloaded versions of the add method. (See the Java documentation.)

  • add(Object o)
  • add(int index, Object element)

Answer 5

Question 6

True or False? A List object is a more-specialized collection than a Collection object.

Answer 6

Question 7

True or False? The version of the add method that requires two parameters cannot be called on a reference to an ArrayList object when that object is treated as the generic type Collection . (See the Java documentation.)

Answer 7

Question 8

What output is produced by the program shown in Listing 2 ?

  • Compiler Error
  • 44321
  • 4321
  • 1234
  • 12344
  • 443521

Answer 8

Question 9

True or False? A List is an ordered collection because the user has control over the location of each element in the collection relative to the otherelements in the collection.

Answer 9

Question 10

What output is produced by the program shown in Listing 3 ?

  • Compiler Error
  • Runtime Error
  • 44321
  • 4321
  • 1234
  • 12344

Answer 10

Question 11

True or False? Because a List makes no attempt to eliminate duplicate elements, or to sort the elements on the basis of their values, there is norequirement to compare objects when placing them in a List . Therefore, objects whose references are stored in a List are not required to implement the Comparable interface (but they may implement the Comparable interface without causing any harm) .

Answer 11

Question 12

True or False? Because a SortedSet does eliminate duplicates and does sort the elements on the basis of their values, there is a requirement to compare each new element with the existing elements in a SortedSet whenever a new element is added to the collection. Therefore, objects whosereferences are stored in a SortedSet are required to implement the Comparable interface.

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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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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