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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

marginal cost formula
Nandu Reply
you should differentiate the total cost function in order to get marginal cost function then you can get marginal cost from it
boniphace
What about total cost
Foday
ok
Foday
formula of cross elasticity of demand
Theresia Reply
what is ceteris paribus
Priyanka Reply
what is ceteris parabus
Priyanka
Ceteris paribus - Literally, "other things being equal"; usually used in economics to indicate that all variables except the ones specified are assumed not to change.
Abdullah
What is broker
scor
land is natural resources that is made by nature
scor
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scor
what is land
kafui
What is broker
scor
land is natural resources that is made by nature
scor
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amarsyaheed Reply
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Philo
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Frank
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Frank
so
owusu
what is production possibility frontier
owusu
it's a summary of opportunity cost depicted on a curve.
okhiria
please help me solve this question with the aid of appropriate diagrams explain how each of the following changes will affect the market price and quantity of bread 1. A
Manuela Reply
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Prosper Reply
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Effah
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adepojurafiu
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Ukpen
hello I'm Babaisa alhaji Mustapha. I'm studying Economics in the university of Maiduguri
Babaisa
okay
Humaira
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Faisal
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Mannan
Wat d meaning of management
igwe Reply
disaster management cycle
Gogul Reply
cooperate social responsibility
igwe
Fedric Wilson Taylor also define management as the act of knowing what to do and seeing that it is done in the best and cheapest way
OLANIYI
difference between microeconomics and macroeconomic
Ugyen Reply
microeconomics is the study of individual units, firm and government while macroeconomics is the study of the economic aggregates.
okhiria
The classical theory of full employment
Lovely
what is monopoli power
Adzaho Reply
the situation that prevails when economic forces balance so that economic variables neither increase nor decrease
Bombey
what is equilibrium
Kabir
what are the important of economic to accounting students with references
salihu Reply
Economics is important because it helps people understand how a variety of factors work with and against each other to control how resources such as labor and capital get used, and how inflation, supply, demand, interest rates and other factors determine how much you pay for goods and services.
Muhammad
explain the steps taken by the government in developing rural market?
Azeem Reply
government provide good road for than
Abigailb
government should provide good agricultural project and it should also provide good road so that the the product that will come out of the farm will be easy transport to the market
ALIMAMY
farming equipments should be provided to farmers to help them improve in farming
Agbor
improving the transport systems providing enterpreneur edecation to the mass living in rural zones enforcment of loans and capital for the people rising awareness on the advantages of rural areas
abdul
contribution of Adam smith in economics
abel Reply
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Dexter
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Patrick
Hey
Fatima
Hey
Amir
Hello
AS
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Umarou
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Amir
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Amir
what's happening here
AS
I love this book and i need extra Economic book
Amir
what is the meaning of function in economics
Effah Reply
Pls, I need more explanation on price Elasticity of Supply
Isaac Reply
Is the degree to the degree of responsiveness of a change in quantity supplied of goods to a change in price
Afran
what is production
Humaira
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scor
And what are the resources in land
scor
the proces of using the services of labor and equipmnt together with other in puts to make goods and services availble
Bombey
Okay what is land mobile and land unmobile
scor
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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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