Logic and Conditionals Quiz

Quiz: Practicing Conditionals with Vowels

Objectives

You will answer a series of multiple choice questions to help you practice the following:

1. Flow control and the use of if, elsif, and else statements.

2. Flow control and the use of case statements.

3. Using comparative operators.

The questions in this quiz are predicated on the idea of building methods that can determine if a letter is a vowel or a consonant. For the purposes of this quiz, vowels will be "a", "e", "i", "o", and "u" (sorry, but you're not in the club, "y").

???

Conditional Vowels

?: Checking for vowels with if, elsif, and else

We're building a method, vowels_with_if_elsif that will take in a letter and return true if that letter is a vowel and false if that letter is a consonant.

def vowels_with_if_elsif(letter)
  < fill me in!! >
end

Which of the following is the correct implementation of if, elsif, and else?

(X)

if letter == "a"
  true
elsif letter == "e"
  true
elsif letter == "i"
  true
elsif letter == "o"
  true
elsif letter == "u"
  true
else
  false
end

( )

if letter = "a"
  true
elsif letter = "e"
  true
elsif letter = "i"
  true
elsif letter = "o"
  true
elsif letter = "u"
  true
else
  false
end

?: What would the following statement return?

letter = "b"

if letter == "a" || letter == "e" || letter ==  "i" || letter == "o" || letter == "u"
  "vowel"
else
  "not a vowel"
end

( )vowel (X)not a vowel

?: Checking for vowels with case

The method vowels_with_case takes in a letter as an argument and uses a case statement to determine if that letter is a vowel.

def vowels_with_case(letter)
  case letter
  < fill me in! > "a"
    true
  < fill me in! > "e"
    true
  < fill me in! > "i"
    true
  < fill me in! > "o"
    true
  < fill me in! > "u"
    true
  else
    false
  end
end

Which keyword correctly replaces < fill me in! > ?

( )if ( )elsif (X)when ( )while

?: Which of the following methods would correctly return true when given the letter "o" as an argument?

(X)

def vowels_with_if_single_line(letter)
  true if letter == "a" || letter == "e" || letter == "i" || letter == "o" || letter == "u"
end

( )

def vowels_with_if_single_line(letter)
  true if letter == "a" && letter == "e" && letter == "i" && letter == "o" && letter == "u"
end

( )

def vowels_with_if_single_line(letter)
  true if letter == "a" || if letter == "e" || if letter == "i" || if letter == "o" || if letter == "u"
end

???

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