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This module contains review questions and answers keyed to the module titled Java4070: The Comparable Interface, Part 1.

Revised: Wed Apr 06 21:57:52 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 Java4070: The Comparable Interface, Part 1 .

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 fact that the location of each element can be controlled in a List is what causes a List to be an unordered collection.

Answer 1

Question 2

True or False? It is not necessary for objects to implement the Comparable interface to make them eligible for inclusion in a List .

Answer 2

Question 3

True or False? It is not necessary for objects to implement the Comparable interface to make them eligible for inclusion in a SortedSet .

Answer 3

Question 4

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

  • Compiler Error
  • 44321
  • 4321
  • 1234
  • 12344

Answer 4

Question 5

True or False? The Collection interface declares the following overloaded versions of the add method. (See the Java documentation.)

  • add(Object o)
  • add(int index, Object element)

Answer 5

Question 6

True or False? A List object is a more-specialized collection than a Collection object.

Answer 6

Question 7

True or False? The version of the add method that requires two parameters cannot be called on a reference to an ArrayList object when that object is treated as the generic type Collection . (See the Java documentation.)

Answer 7

Question 8

What output is produced by the program shown in Listing 2 ?

  • Compiler Error
  • 44321
  • 4321
  • 1234
  • 12344
  • 443521

Answer 8

Question 9

True or False? A List is an ordered collection because the user has control over the location of each element in the collection relative to the otherelements in the collection.

Answer 9

Question 10

What output is produced by the program shown in Listing 3 ?

  • Compiler Error
  • Runtime Error
  • 44321
  • 4321
  • 1234
  • 12344

Answer 10

Question 11

True or False? Because a List makes no attempt to eliminate duplicate elements, or to sort the elements on the basis of their values, there is norequirement to compare objects when placing them in a List . Therefore, objects whose references are stored in a List are not required to implement the Comparable interface (but they may implement the Comparable interface without causing any harm) .

Answer 11

Question 12

True or False? Because a SortedSet does eliminate duplicates and does sort the elements on the basis of their values, there is a requirement to compare each new element with the existing elements in a SortedSet whenever a new element is added to the collection. Therefore, objects whosereferences are stored in a SortedSet are required to implement the Comparable interface.

Questions & Answers

What is a cell
Odelana Reply
how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
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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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