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This page contains review questions and answers for the page titled "Json0210: Structure of the json-simple Java Library" in the book titled "The json-simple Java Library".

Revised: Fri Jun 03 17:21:17 CDT 2016

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Table of Contents


This is a page from the book titled The json-simple Java Library . The book explains how to use the json-simple Java library to generate, transform, and query JSON text. This page provides review questionsand answers for the page titled Json0210: Structure of the json-simple Java Library . Once you study that page, you should be able to answer the review questions in this page.

The questions and the answers in this page are connected by hyperlinks to make it easy for you to navigate from the question to the answer and back again.


Question 1 .

True or False? Version 1.1 of the json-simple Java library contains the following packages:

  • org.json.simple
  • org.json.simple.parser

Go to answer 1

Question 2

True or False? Version 1.1 of the json-simple Java library contains the public classes shown below

  • ItemList
  • JSONArray
  • JSONObject
  • JSONParser
  • JSONValue
  • ParseException
  • Object
  • Yytoken

Go to answer 2

Question 3

True or False? Version 1.1 of the json-simple Java library contains a class named Yylex in the org.json.simple.parser package that is declared to be package-private .

Go to answer 3

Question 4

True or False? Despite its name, the JSONArray class is not really an array. Instead, it is a List .

Go to answer 4

Question 5

True or False? Objects of the JSONArray class contain unordered data.

Go to answer 5

Question 6

True or False? Other than the JSONObject class and the JSONArray class, all of the classes in version 1.1 of the json-simple Java library extend the Object class.

Go to answer 6

Question 7

True or False? The JSONObject class extends the standard Java TreeSet class.

Go to answer 7

Question 8

True or False? An object of the JSONObject class maps keys or names to values .

Go to answer 8

Question 9

True or False? An object of the JSONObject class can contain duplicate keys but cannot contain duplicate values.

Go to answer 9

Question 10

True or False? An object of the JSONObject class is an unordered collection.

Go to answer 10

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Answer 10

True. An object of the JSONObject class extends the HashMap class and implements the Map interface. According to the Oracle documentation, "The order of a map is defined as the order in which the iterators on the map's collection views return theirelements. Some map implementations, like the TreeMap class, make specific guarantees as to their order; others, like the HashMap class, do not."

Go back to Question 10

Answer 9

False. The JSONObject class implements the Map interface. According to the Oracle documentation, "A map cannot contain duplicate keys; each key can map to at most one value."

Go back to Question 9

Answer 8

True. JSON documentation often speaks of name/value pairs. However, the JSONObject class extends the standard Java HashMap class, which implements the Map interface. According to the Oracle Java documentation, an object that implements the Map interface is "An object that maps keys to values." Therefore, it is probably acceptable to use the terms name/value and key/value interchangeably.

Go back to Question 8

Answer 7

False. The JSONObject class extends the standard Java HashMap class.

Go back to Question 7

Answer 6


Go back to Question 6

Answer 5

False. Because the JSONArray class extends the ArrayList class, which implementsthe List interface, it is "An ordered collection (also known as a sequence). The user of this interface has precise control over where in the list each element is inserted. The user can access elements by their integer index (position in the list), and search for elements in the list."

Go back to Question 5

Answer 4

True. The JSONArray class extends the standard ArrayList class, which implements the List interface.

Go back to Question 4

Answer 3


Go back to Question 3

Answer 2

False. Version 1.1 of the json-simple Java library does not contain a class named Object .

Go back to Question 2

Answer 1


Go back to Question 1


This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Json0210R: Review
  • File: Json0210R.htm
  • Published: 06/03/16

Financial : Although the Connexions site makes it possible for you to download aPDF file for this module at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, youshould be aware that some of the HTML elements in this module may not translate well into PDF.

I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version ofthe module.

In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale onAmazon.com showing me as the author. I neither receive compensation for those sales nor do I know who does receive compensation. If youpurchase such a book, please be aware that it is a copy of a module that is freely available on cnx.org and that it was made andpublished without my prior knowledge.

Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.


Questions & Answers

how can chip be made from sand
Eke Reply
is this allso about nanoscale material
are nano particles real
Missy Reply
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
where is the latest information on a no technology how can I find it
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
has a lot of application modern world
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
yes that's correct
I think
Nasa has use it in the 60's, copper as water purification in the moon travel.
nanocopper obvius
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
analytical skills graphene is prepared to kill any type viruses .
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
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