How Ruby interprets code at runtime - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print 'Hello, Ruby!' to the console.

Ruby

puts [1]

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

A'Hello Ruby'

BHello, Ruby!

C"Hello, Ruby!"

Dprint 'Hello, Ruby!'

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to put quotes around the string.

Using print instead of puts when the instruction asks for puts.

The puts method prints the string to the console. The string must be in quotes.

2fill in blank

medium

Complete the code to define a method named 'greet' that takes a name and prints a greeting.

Ruby

def greet(name)
  puts "Hello, #{ [1] }!"
end

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

Auser

Bname

Cgreet

DName

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different variable name than the method parameter.

Forgetting that Ruby variables are case-sensitive.

The method parameter name is used inside the string to greet the person.

3fill in blank

hard

Fix the error in the code to correctly add two numbers and print the result.

Ruby

a = 5
b = 10
puts a [1] b

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

A+

B-

C*

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using subtraction or multiplication instead of addition.

Forgetting to put spaces around operators (though Ruby allows it).

The plus sign + adds two numbers together in Ruby.

4fill in blank

hard

Fill both blanks to create a hash with keys as symbols and values as strings.

Ruby

person = { [1]: "Alice", [2]: "Developer" }

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

Aname

Bage

Cjob

Dcity

Attempts:

3 left

💡 Hint

Common Mistakes

Using strings as keys instead of symbols.

Choosing keys that don't match the values.

Symbols like :name and :job are used as keys in Ruby hashes.

5fill in blank

hard

Fill all three blanks to create an array of numbers, select only even numbers, and print them.

Ruby

numbers = [[1], [2], [3]]
even_numbers = numbers.select { |n| n.even? }
puts even_numbers

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

A2

B4

C6

Deven

Attempts:

3 left

💡 Hint

Common Mistakes

Using odd numbers in the array.

Forgetting to use the even? method to filter.

The array contains numbers 2, 4, and 6. The select method filters even numbers using even?.