Why testing is central to Ruby culture - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print a greeting message.

Ruby

puts [1]

Drag options to blanks, or click blank then click option'

Aecho "Hello, Ruby!"

BHello, Ruby!

Cprint "Hello, Ruby!"

D"Hello, Ruby!"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the string.

Using print instead of puts.

In Ruby, puts prints the string to the screen. The string must be in quotes.

2fill in blank

medium

Complete the code to define a method that returns true if a number is even.

Ruby

def even_number?(num)
  num.[1]
end

Drag options to blanks, or click blank then click option'

Ais_even

Beven?

Codd?

Dcheck_even

Attempts:

3 left

💡 Hint

Common Mistakes

Using odd? instead of even?.

Trying to use non-existent methods like is_even.

The Ruby method even? returns true if the number is even.

3fill in blank

hard

Fix the error in the test code to check if 5 is odd using RSpec.

Ruby

RSpec.describe 'Number' do
  it 'checks if 5 is odd' do
    expect(5.[1]).to be true
  end
end

Drag options to blanks, or click blank then click option'

Ais_odd

Bcheck_odd

Codd?

Deven?

Attempts:

3 left

💡 Hint

Common Mistakes

Using even? which returns false for 5.

Using non-existent methods like is_odd.

In RSpec, to check if 5 is odd, use the Ruby method odd?.

4fill in blank

hard

Fill both blanks to create a hash of word lengths for words longer than 3 letters.

Ruby

lengths = {}
for word in words
  if word.[2] 3
    lengths[word] = word.[1]
  end
end

Drag options to blanks, or click blank then click option'

Alength

Bsize

Clength? >

Dlength >

Attempts:

3 left

💡 Hint

Common Mistakes

Using length? which is not a Ruby method.

Using incorrect comparison operators.

Use word.size to get the length of the word and compare it with 3 using >.

5fill in blank

hard

Fill all three blanks to create a hash of uppercase words and their lengths for words longer than 4 letters.

Ruby

result = {}
for word in words
  if word.length [3] 4
    result[[1]] = [2]
  end
end

Drag options to blanks, or click blank then click option'

Aword.upcase

Bword.length

C>

Dword.downcase

Attempts:

3 left

💡 Hint

Common Mistakes

Using word.downcase instead of uppercase.

Using wrong comparison operators.

Use word.upcase as the key, word.length as the value, and check if length is greater than 4 with >.