What will be the output of the following Ruby code?

medium📝 Predict Output Q13 of 15

Ruby - Hashes

h = {a: 1, b: 2, c: 3}
h.keys

A[:1, :2, :3]

B[1, 2, 3]

C{a: 1, b: 2, c: 3}

D[:a, :b, :c]

Step-by-Step Solution

Solution:

Step 1: Understand keys method on hash
The keys method returns an array of all keys in the hash. Here keys are symbols :a, :b, :c.
Step 2: Match output with options
[:a, :b, :c] matches the array of keys. [1, 2, 3] is values, C is the whole hash, D is invalid symbol array.
Final Answer:
[:a, :b, :c] -> Option D
Quick Check:
h.keys = [:a, :b, :c] [OK]

Quick Trick: keys returns array of keys exactly as in hash [OK]

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