[Solved] What issue will arise when running this Ruby code?data = { :title => 'Book', 'pages' => 300 } puts data['title'] | Ruby

Ruby - Hashes

What issue will arise when running this Ruby code?

data = { :title => 'Book', 'pages' => 300 }
puts data['title']

AIt returns nil because 'title' is a symbol key, not a string key

BIt raises a syntax error due to mixed key types

CIt prints 'Book' correctly

DIt raises a runtime error because keys must be all symbols or all strings

Step-by-Step Solution

Solution:

Step 1: Identify key types
The hash has a symbol key :title and a string key 'pages'.
Step 2: Access with string key
Accessing data['title'] looks for a string key 'title', but the key is a symbol :title.
Final Answer:
It returns nil because 'title' is a symbol key, not a string key -> Option A
Quick Check:
Accessing with mismatched key types returns nil [OK]

Quick Trick: Symbol and string keys are distinct in hashes [OK]

Common Mistakes:

MISTAKES

Master "Hashes" in Ruby

9 interactive learning modes - each teaches the same concept differently

More Ruby Quizzes

What issue will arise when running this Ruby code?