[Solved] When parsing JSON in Ruby, what happens if the JSON string contains duplicate keys? — Ans: The last key-value pair overwrites previous ones | Ruby

Ruby - File IO

When parsing JSON in Ruby, what happens if the JSON string contains duplicate keys?

AThe last key-value pair overwrites previous ones

BAn error is raised for duplicate keys

CAll values are stored in an array under the key

DOnly the first key-value pair is kept

Step-by-Step Solution

Solution:

Step 1: Understand Ruby hash behavior on duplicate keys
Ruby hashes overwrite earlier values when duplicate keys are assigned.
Step 2: Apply this to JSON.parse output
When JSON.parse encounters duplicate keys, the last key-value pair overwrites previous ones in the resulting hash.
Final Answer:
The last key-value pair overwrites previous ones -> Option A
Quick Check:
Duplicate JSON keys = last wins in Ruby hash [OK]

Quick Trick: Duplicate keys in JSON parsed to Ruby hash overwrite earlier values [OK]

Common Mistakes:

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When parsing JSON in Ruby, what happens if the JSON string contains duplicate keys?