Question 1

Concatenation is performed using the & character.

Accepted Answer

Concatenation is typically performed using the "+" character in many programming languages, although some languages or contexts might use "&" or other operators for concatenation.

Question 2

Interpolation is the process of substituting the value of an expression or variable inside a string.

Accepted Answer

Interpolation is the process of substituting the value of an expression or variable inside a string.

Question 3

Objects are partially self-contained entities designed to work with methods and properties stored externally to itself.

Accepted Answer

Objects are self-contained entities with their own methods and properties defined within or associated directly with them, not stored externally.

Question 4

Escape characters provide the ability to embed instructions into text strings that tell Ruby how to format displayed text.

Accepted Answer

This statement is true. Escape characters are used to embed instructions into text strings in order to format displayed text.

Question 5

Single-quoted strings support both escaping and variable substitution.

Accepted Answer

Single-quoted strings in many programming languages do not support variable substitution and typically allow fewer escape sequences than double-quoted strings.

Question 6

You can create new strings by multiplying existing strings using the String class's * method.

Accepted Answer

Multiplying an existing string with an integer n will create a new string that is n copies of the original string concatenated together.

Question 7

Concatenation is the process of splitting a string into two smaller strings.

Accepted Answer

Concatenation is actually the process of combining two or more strings into one larger string. It is the opposite of splitting a string.

Question 8

Ruby is not an object-oriented programming language.

Accepted Answer

Ruby is a purely object-oriented programming language where everything is an object, even primitive data types like numbers and strings.

Question 9

An attr_accessor is a keyword that identifies a list of one or more object properties.

Accepted Answer

An attr_accessor is a keyword in Ruby that creates getter and setter methods for one or more object properties. It allows us to read and write the value of instance variables of a class.

Question 10

Text plays a big role in many scripts when communicating with users. Text strings in Ruby can consist of letters, numbers, special characters and even blank spaces.

Accepted Answer

Text strings in Ruby can include a variety of characters including letters, numbers, special characters and blank spaces.

Question 11

To compare two strings to see if they are equal the = operator must be used.

Accepted Answer

To compare two strings for equality in most programming languages, the `==` operator is used for comparison, while the `=` operator is typically used for assignment.

Question 12

Objet properties are implemented as named variables.

Accepted Answer

In JavaScript, object properties are implemented as named variables.

Question 13

When working with #{} , Ruby is able to perform variable substitution.

Accepted Answer

With #{} syntax, variables can be inserted directly into a string. Ruby evaluates the variable and replaces the #{} expression with its value at runtime.

Question 14

A method is an object attribute stored as a variable that describes a particular aspect or feature of the object.

Accepted Answer

A method is not an attribute stored as a variable, but rather a function that can be called on the object to perform a specific task or computation.

Question 15

When creating multiline text strings using the %q{ and } and %Q{ and } characters, you can substitute any characters you wish in place of the { and } characters.

Accepted Answer

This statement is true. You can use any pair of matching delimiters instead of the { and } characters to create multiline text strings using %q{ and } and %Q{ and }.

Question 16

Creating a string by embedding characters inside the %q{ and } characters is equivalent to embedding them within double quotes.

Accepted Answer

The %q{...} syntax in Ruby creates a string similar to single-quoted strings, not double-quoted strings, meaning it does not support interpolation or escape sequences, except for the escape of the closing bracket.

Question 17

new is a method that initiates the creation of a new object.

Accepted Answer

The new keyword in programming is used to create a new instance of an object or a class. When new is used, it calls the constructor of the class to create a new instance of that class. Therefore, new is a method that initiates the creation of a new object.

Question 18

The String class's swapcase method converts a string to all uppercase letters.

Accepted Answer

The String class's swapcase method actually takes all uppercase letters and converts them to lowercase, and vice versa.

Question 19

When working with double-quotes, Ruby is not able to perform escaping.

Accepted Answer

Ruby is able to perform escaping when working with double-quotes. For example, you can use double-quotes to create a string that includes special characters such as 
 for a new line or " to include a double-quote within the string.

Question 20

The advantage of using %q{ and } and %Q{ and } characters in place of quotation marks is that these characters allow for the creation of strings that span multiple lines.

Accepted Answer

The %q{ and } and %Q{ and } characters allow for the creation of strings that span multiple lines, making it easier to write longer strings without having to use backslashes or concatenate multiple strings together.

Quiz 3: Working With Strings, Objects, and Variables

Concatenation is performed using the & character.

Interpolation is the process of substituting the value of an expression or variable inside a string.

Objects are partially self-contained entities designed to work with methods and properties stored externally to itself.

Escape characters provide the ability to embed instructions into text strings that tell Ruby how to format displayed text.

Single-quoted strings support both escaping and variable substitution.

You can create new strings by multiplying existing strings using the String class's * method.

Concatenation is the process of splitting a string into two smaller strings.

Ruby is not an object-oriented programming language.

An attr_accessor is a keyword that identifies a list of one or more object properties.

Text plays a big role in many scripts when communicating with users. Text strings in Ruby can consist of letters, numbers, special characters and even blank spaces.

To compare two strings to see if they are equal the = operator must be used.

Objet properties are implemented as named variables.

When working with #{} , Ruby is able to perform variable substitution.

A method is an object attribute stored as a variable that describes a particular aspect or feature of the object.

When creating multiline text strings using the %q{ and } and %Q{ and } characters, you can substitute any characters you wish in place of the { and } characters.

Creating a string by embedding characters inside the %q{ and } characters is equivalent to embedding them within double quotes.

new is a method that initiates the creation of a new object.

The String class's swapcase method converts a string to all uppercase letters.

When working with double-quotes, Ruby is not able to perform escaping.

The advantage of using %q{ and } and %Q{ and } characters in place of quotation marks is that these characters allow for the creation of strings that span multiple lines.