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This module contains review questions and answers keyed to the module titled Java4110: The Comparator Interface, Part 3.

Revised: Thu Apr 07 12:07:06 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 Java4110: The Comparator Interface, Part 3 .

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 .

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

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

Answer 1

Question 2

True or False? The fillIt method in Listing 1 populates the TreeSet object referred by the incoming parameter with the following names in the following order:

Joe Bill Tom JOE BILL TOM

Answer 2

Question 3

True or False? When the fillIt method in Listing 1 returns, the TreeSet object is populated with six names in descending order taking case into account.

Answer 3

Question 4

True or False? In the output from Listing 1 , descending order means that names beginning with letters that are low in the alphabet occur before names beginning with letters that arehigher in the alphabet. In addition, names containing lower case characters appear before the same names containing only upper case characters.

Answer 4

Question 5

True or False? In Listing 1 , names with the same spelling but different case were considered to be duplicates and therefore wereexcluded from the collection

Answer 5

Question 6

True or False? Given: Listing 1 contains the following statement:

return result*(-1);

If you were to change the value in parentheses from -1 to -2, the program output would be:

BILL Bill JOE Joe TOM Tom

Answer 6

Listings

What is the meaning of the following two images?

These images were inserted here simply to insert some space between the questions and the answers to keep them from being visible on the screen at thesame time.

Spacer image of a rabbit and a penguin.

This image was also inserted for the purpose of inserting space between the questions and the answers.

Spacer image of a penguin and some houses.

Answers

Answer 6

False. If you were to change the value in parentheses from -1 to -2, the program output would still be:

Tom TOM Joe JOE Bill BILL

It is the sign of the result and not the value of the result that determines the sorting order of the output in Listing 1 . You would need to multiply by a positive value to cause the output to be

BILL Bill JOE Joe TOM Tom

Back to Question 6

Answer 5

False. In Listing 1 , names with the same spelling but different case were not considered to be duplicates insofar as the contractfor the set was concerned.

Questions & Answers

what is mutation
Janga Reply
what is a cell
Sifune Reply
how is urine form
Sifune
what is antagonism?
mahase Reply
classification of plants, gymnosperm features.
Linsy Reply
what is the features of gymnosperm
Linsy
how many types of solid did we have
Samuel Reply
what is an ionic bond
Samuel
What is Atoms
Daprince Reply
what is fallopian tube
Merolyn
what is bladder
Merolyn
what's bulbourethral gland
Eduek Reply
urine is formed in the nephron of the renal medulla in the kidney. It starts from filtration, then selective reabsorption and finally secretion
onuoha Reply
State the evolution relation and relevance between endoplasmic reticulum and cytoskeleton as it relates to cell.
Jeremiah
what is heart
Konadu Reply
how is urine formed in human
Konadu
how is urine formed in human
Rahma
what is the diference between a cavity and a canal
Pelagie Reply
what is the causative agent of malaria
Diamond
malaria is caused by an insect called mosquito.
Naomi
Malaria is cause by female anopheles mosquito
Isaac
Malaria is caused by plasmodium Female anopheles mosquitoe is d carrier
Olalekan
a canal is more needed in a root but a cavity is a bad effect
Commander
what are pathogens
Don Reply
In biology, a pathogen (Greek: πάθος pathos "suffering", "passion" and -γενής -genēs "producer of") in the oldest and broadest sense, is anything that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ. The term pathogen came into use in the 1880s.[1][2
Zainab
A virus
Commander
Definition of respiration
Muhsin Reply
respiration is the process in which we breath in oxygen and breath out carbon dioxide
Achor
how are lungs work
Commander
where does digestion begins
Achiri Reply
in the mouth
EZEKIEL
what are the functions of follicle stimulating harmones?
Rashima Reply
stimulates the follicle to release the mature ovum into the oviduct
Davonte
what are the functions of Endocrine and pituitary gland
Chinaza
endocrine secrete hormone and regulate body process
Achor
while pituitary gland is an example of endocrine system and it's found in the Brain
Achor
what's biology?
Egbodo Reply
Biology is the study of living organisms, divided into many specialized field that cover their morphology, physiology,anatomy, behaviour,origin and distribution.
Lisah
biology is the study of life.
Alfreda
Biology is the study of how living organisms live and survive in a specific environment
Sifune
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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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