Deck 1: Ruby Basics

Question 1

Ruby scripts run slower than their compiled counterparts because each time they run they must be reinterpreted.

Answer 1

True

Question 2

Ruby was created as a joint project between Microsoft and Apple.

Answer 2

False

Question 3

A class is a definition or template used to define the properties and methods that represents objects.

Answer 3

True

Question 4

Ruby is generally regarded as a natural, English-like scripting language.

Question 5

Ruby on Rails (Rails) is a Web-based application development framework that allows programmers to build website applications using Ruby.

Question 6

The things that describe or characterize an object, such as size or type are referred to as object methods.

Question 7

A variable is a reference or a pointer to a location in memory where a piece of data is stored.

Question 8

Unlike other scripting languages, Ruby only runs on operating systems. It does not support execution within virtual systems.

Question 9

Ruby requires that all variables be formally declared prior to its use.

Question 10

A feature of Ruby that sets it apart from many other programming languages is its light syntax.

Question 11

Many programmers use Ruby to develop scripts that tie together other applications, providing the programmatic glue needed to take disparate applications and get them to work together.

Question 12

Ruby's problem in the early days was the lack of a killer application that demonstrated is capabilities.

Question 13

Ruby is the name of the scripting language and not just a clever acronym.

Question 14

Ruby was created from the ground up with ease of use in mind on it was only a few years later that it was adapted as an object-oriented programming language.

Question 15

Ruby is an object-oriented scripting language originally developed in 1981 to run on Microsoft Windows.

Question 16

The origins of Ruby go back to 1995 where it quickly gained notice and popularity in Japan.

Question 17

Like most object-oriented programming languages, Ruby distinguishes between objects and numbers.

Question 18

As an interpreted scripting language, Ruby scripts are compiled into executable programs upon created, ensure that they execute quickly and with great efficiency.

Question 19

Actions that can be taken against an object or which an object can be directed to perform are stored as part of the object are properties.

Question 20

Ruby is distributed under a restricted licensing arrangement that permits limited use allowing anyone to freely install and use it.

Question 21

The IRB can be accessed on Microsoft Windows through the fxri.

Question 22

To find out if Ruby is installed, you can type ruby -v at the operating system command prompt.

Question 23

Ruby's development was heavily influenced by all of the following except ____.

A) Perl
B) Smalltalk
C) Visual Basic
D) Python

Question 24

Which of the following URLs does not provide you with access to Ruby installation files?

A) Locomotive - http://locomotive.raaum.org/
B) MacPorts - http://www.macports.org/
C) RubyMac - http://www.rubmac.net/
D) Fink - http://finkproject.org/

Question 25

Part of the reason Ruby was slow to gain popular acceptance outside of Japan was ____.

A) An initial lack of non-Japanese documentation
B) An overly complex syntax
C) Poor marketing and advertising
D) An incompatibility with UNIX operating systems

Question 26

The application that first demonstrated Ruby's capabilities was ____.

A) Ruby on Rails
B) Ajax
C) Web 2.0
D) None of the above

Question 27

The IRB is ____.

A) A Ruby shell that acts an interface between you and Ruby
B) A batch utility that allows you to schedule the execution of script files
C) An interactive remote Ruby test environment that support remote script execution
D) None of the above

Question 28

Ruby scripts can run directly on all of the following operating systems except ____.

A) Microsoft Windows
B) MVS
C) Linux and UNIX
D) Mac OS X

Question 29

Which of the following is not found on a Microsoft Windows installation of Ruby?

A) fxri - Interactive Ruby Help & Console
B) SciTe
C) Ruby Documentation
D) Ruby Debug Console

Question 30

Ruby is a simple yet powerful scripting language that ____.

A) Is interpreted
B) Supports a natural English-like programming style
C) Has light syntax requirements
D) All of the above

Question 31

IRB stands for Interactive Ruby and is used to interactively submit Ruby statements for immediate processing.

Question 32

By default, Microsoft Windows automatically installs Ruby.

Question 33

Ruby was created to address the shortcomings found in other programming languages. These shortcomings include ____.

A) Being overly complex
B) Difficult to learn and work with
C) Cryptic and inconsistent syntax
D) All of the above

Question 34

In addition to running on different operating systems. Ruby also supports execution within various virtual machine environments, including ____.

A) JRuby
B) IronRuby
C) Both of the above
D) Neither of the above

Question 35

The IRB lets you type in commands and small code snippets and to retrieve immediate results. The IRB command prompt consists of multiple parts separated by a colon as shown here: irb(main):001:0> Which of these parts is incorrectly described below?

A) (main) - Identifies the current class (in this case the main object)
B) 001 - A three digit number showing Ruby's version number
C) 0 - Represents the current queue depth when working with a class
D) > - The end of the command prompt

Question 36

To determine if Ruby is installed on your computer, you can open the command prompt and type which of the following commands?

A) ipconfig all
B) ruby -v
C) dir ruby
D) ruby -verify

Question 37

By default, Ruby comes pre-installed on all versions of Mac OS X starting with version 10.3.

Question 38

Programmers around the world use Ruby to develop scripts that perform tasks that include ____.

A) Processing text files
B) Network programming
C) System administration
D) All of the above

Question 39

You can stop the current IRB session at any time and return to the operating system's command prompt by entering ____.

A) Quit
B) Terminate
C) Stop
D) Exit

Question 40

Ruby on Rails supports which of the following development environments?

A) Operating system scripting
B) System administration
C) Web development
D) Application prototyping

Question 41

Which of the following code/text editors work on Window, Mac OS X, Linux and UNIX?

A) FreeRIDE
B) Notepad
C) KATE
D) vi

Question 42

fxri stands for____.

A) Fast Extensive Ruby Interface
B) Ruby Console and Help Facility
C) Interactive Ruby Help and Console
D) Interactive Ruby Execution Host

Question 43

Ruby scripts end with a ____ file extension.

A) .rs
B) .rb
C) .rbs
D) .script

Question 44

Which of the following statements is sometimes included as the first statement in a Ruby script?

A) #!/usr/local/bin/ruby -w
B) chmod +x
C) %Ruby_execute
D) #!\user\

Question 45

Windows Ruby script developers can use the ____ code/text editor.

A) Notepad
B) TextEdit
C) SciTE
D) a. or c.