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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

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
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
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
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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