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This module contains review questions and answers keyed to the module titled Java4120: The Comparator Interface, Part 4.

Revised: Thu Apr 07 13:19:31 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 Java4120: The Comparator Interface, Part 4 .

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 Collection interface declares a method named convertToArray , which can be called on a Collection object to "return an array containing all of the elements in this collection whose runtime type is that of the specified array" .

Answer 1

Question 2

True or False? A Comparator object can be used to sort the contents of an array containing references to objects.

Answer 2

Question 3

True or False? An array is a container that can be used to store a collection of primitive values or a collection of references to objects.

Answer 3

Question 4

Write down the output produced by the program shown in Listing 1 . Hint: There are ten lines of output.

Answer 4

Question 5

True or False? A Vector object is a Set object.

Answer 5

Question 6

True or False? Because a Vector object is a List object, it is not allowed to contain duplicate elements.

Answer 6

Question 7

True or False? Because a Vector is a List , it is an ordered collection.

Answer 7

Question 8

True or False? The position of each element in an ordered collection is determined by i ts value relative to the values of its neighbors.

Answer 8

Question 9

True or False? The add method for the Vector class simply adds each new element to the end of the list.

Answer 9

Question 10

True or False? When an iterator is used to traverse the elements in a Vector collection, the elements are delivered by the iterator in ascending index order, beginning with the element stored at index 0.

Answer 10

Question 11

True or False? The first time the iterator is applied to the Vector object in Listing 1 , the output is in ascending natural order as shown below:

BILL Bill JOE Joe TOM Tom

Answer 11

Question 12

True or False? The toArray method can be called on a Vector object to return a reference to an array object containing all of the elements in the Vector in ascending index order.

Answer 12

Question 13

True or False? The documentation for the toArray method of the Collection interface reads partially as follows:

"Returns an array containing all of the elements in this collection. If the collection makes any guarantees as to what order its elements arereturned by its iterator, this method must return the elements in the same order.

Questions & Answers

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
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
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
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
hi
Loga
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
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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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