Symbol keys vs string keys decision in Ruby - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a hash with a symbol key.

Ruby

person = { [1] => 'Alice' }

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

A:name

B'name'

C"name"

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around the key when a symbol is needed.

In Ruby, symbol keys are written with a colon before the name, like :name.

2fill in blank

medium

Complete the code to access the value using a string key.

Ruby

person = { 'name' => 'Bob' }
puts person[[1]]

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

A:name

Bname

C'name'

D"name"

Attempts:

3 left

💡 Hint

Common Mistakes

Using a symbol to access a string key.

When the key is a string, you must use the exact string to access the value, including quotes.

3fill in blank

hard

Fix the error in accessing the hash value with a symbol key.

Ruby

person = { name: 'Carol' }
puts person[[1]]

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

A:name

Bname

C"name"

D'name'

Attempts:

3 left

💡 Hint

Common Mistakes

Using a string to access a symbol key.

The hash uses a symbol key :name, so you must use the symbol to access it.

4fill in blank

hard

Fill both blanks to create a hash with a string key and access its value.

Ruby

data = { [1] => 42 }
puts data[[2]]

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

A'answer'

B:answer

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing symbol and string keys.

The hash key is a string 'answer', so you must use the same string to access it.

5fill in blank

hard

Fill all three blanks to create a hash with symbol keys and print the value for :city.

Ruby

location = { [1] => 'New York', [2] => 'USA' }
puts location[[3]]

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

A:city

B:country

Attempts:

3 left

💡 Hint

Common Mistakes

Using string keys to access symbol keys.

The hash uses symbol keys :city and :country. To print the city, use :city as the key.