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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

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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