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This module contains review questions and answers keyed to the module titled Java4140: The Comparator Interface, Part 6,

Revised: Fri Apr 08 11:14:25 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 Java4140: The Comparator Interface, Part 6 .

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 reverseOrder method of the Collections class returns a reference to an object of type String .

Answer 1

Question 2

True or False? The reverse method of the Collections class returns a reference to an object of the interface type List .

Answer 2

Question 3

True or False? A Comparator created by the reverseOrder method of the Collections class can be used to sort a list into reverse natural order .

Answer 3

Question 4

What output is produced by the program shown in Listing 1 (select one or more answers) ?

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

Answer 4

Question 5

True or False? The ArrayList class implements both the Collection interface and the List interface. Therefore, it is both a collection and a list , and adheres to the contracts and stipulations of both interfaces.

Answer 5

Question 6

True or False? The reverseOrder method returns a Comparator that imposes the reverse of the natural ordering on a collection of objects that implement the Comparable interface.

Answer 6

Question 7

True or False? The natural ordering of the elements in a collection is the ordering imposed by the objects' own compare method.

Answer 7

Question 8

True or False? All Java objects have a natural ordering .

Answer 8

Question 9

True or False? The Comparator object returned by the reverseOrder method can be used to impose a reverse natural order on any collection of objects that implement the Comparable interface.

Answer 9

Question 10

True or False? If you don't understand interfaces, they can't possibly understand Java.

Answer 10

Question 11

True or False? A SortedMap is a Map that maintains its entries in ascending order, sorted according to the values' natural ordering, or according to a Comparator provided at the time of the SortedMap creation.

Answer 11

Question 12

True or False? An object of type Map is an object that maps keys to values. Such an object can contain duplicate keys but cannot containduplicate values

Answer 12

Question 13

True or False? An object of type Deque allows elements to be inserted, retrieved, and removed at both ends.

Questions & Answers

the diagram of the digestive system
Assiatu Reply
How does twins formed
William Reply
They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
what is genetics
Josephine Reply
Genetics is the study of heredity
Misack
how does twins formed?
Misack
What is manual
Hassan Reply
discuss biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles
Joseph Reply
what is biology
Yousuf Reply
the study of living organisms and their interactions with one another and their environments
AI-Robot
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
Joseph Reply
what is the blood cells
Shaker Reply
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
Abdullahi Reply
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
Ramadan
What is classification
ISCONT Reply
is organisms that are similar into groups called tara
Yamosa
in what situation (s) would be the use of a scanning electron microscope be ideal and why?
Kenna Reply
A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
Hilary
cell is the building block of life.
Condoleezza Reply
what is cell divisoin?
Aron Reply
Diversity of living thing
ISCONT
what is cell division
Aron Reply
Cell division is the process by which a single cell divides into two or more daughter cells. It is a fundamental process in all living organisms and is essential for growth, development, and reproduction. Cell division can occur through either mitosis or meiosis.
AI-Robot
What is life?
Allison Reply
life is defined as any system capable of performing functions such as eating, metabolizing,excreting,breathing,moving,Growing,reproducing,and responding to external stimuli.
Mohamed
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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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