Dynamic typing vs strong typing in Ruby - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to assign a string to the variable.

Ruby

name = [1]

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

A"Alice"

B42

Ctrue

D:symbol

Attempts:

3 left

💡 Hint

Common Mistakes

Using a number or boolean instead of a string.

In Ruby, strings are written inside double quotes. Here, "Alice" is a string.

2fill in blank

medium

Complete the code to add two numbers.

Ruby

sum = 10 [1] 5

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.

The plus sign (+) adds two numbers together in Ruby.

3fill in blank

hard

Fix the error in the code by choosing the correct method to convert a number to a string.

Ruby

number = 100
text = number.[1]

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

Ato_sym

Bto_i

Cto_s

Dto_a

Attempts:

3 left

💡 Hint

Common Mistakes

Using to_i which converts to integer, not string.

In Ruby, to_s converts a number to a string.

4fill in blank

hard

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

Ruby

person = { [1]: [2] }

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

A:name

B"Bob"

Cname

DBob

Attempts:

3 left

💡 Hint

Common Mistakes

Using a string as a key without colon or unquoted value.

In Ruby, hash keys can be symbols like :name, and values can be strings like "Bob".

5fill in blank

hard

Fill all three blanks to create a method that takes a parameter and returns its class name as a string.

Ruby

def get_type([1])
  [2].class.[3]
end

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

Avalue

Cto_s

Dclass_name

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong parameter name or method that doesn't convert to string.

The method takes a parameter named value. Then it calls value.class.to_s to get the class name as a string.