[Solved] Identify the error in this Ruby code snippet:require 'json' json_str = '{"a":1, "b":2}' obj = JSON.parse(json_str) puts obj[:a] | Ruby

Ruby - File IO

Identify the error in this Ruby code snippet:

require 'json'
json_str = '{"a":1, "b":2}'
obj = JSON.parse(json_str)
puts obj[:a]

AJSON string is invalid

BUsing symbol key :a instead of string key "a"

CMissing require 'json' statement

DUsing puts instead of print

Step-by-Step Solution

Solution:

Step 1: Understand JSON.parse output keys
JSON.parse returns a Ruby hash with string keys, not symbols.
Step 2: Check key access method
Accessing obj[:a] uses a symbol key, which does not exist in the hash, resulting in nil.
Final Answer:
Using symbol key :a instead of string key "a" -> Option B
Quick Check:
JSON keys are strings, access with string keys [OK]

Quick Trick: Access parsed JSON keys with strings, not symbols [OK]

Common Mistakes:

Master "File IO" in Ruby

9 interactive learning modes - each teaches the same concept differently

More Ruby Quizzes

Identify the error in this Ruby code snippet: