Why does the enumerated() method return a sequence of tuples instead of a dictionary when iterating over an array in Swift?

hard📝 Conceptual Q10 of 15

Swift - Collections

Why does the enumerated() method return a sequence of tuples instead of a dictionary when iterating over an array in Swift?

ABecause dictionaries are unordered and enumerated() needs to sort elements

BBecause tuples are faster to create than dictionaries

CBecause enumerated() modifies the original array to tuples

DBecause arrays have ordered elements and enumerated() preserves order with index-element pairs

Step-by-Step Solution

Solution:

Step 1: Understand array order and enumerated() purpose
Arrays keep elements in order. enumerated() pairs each element with its index to preserve this order.
Step 2: Compare tuples vs dictionaries
Dictionaries are unordered collections, so enumerated() returns tuples to keep order and allow iteration with indices.
Final Answer:
Because arrays have ordered elements and enumerated() preserves order with index-element pairs -> Option D
Quick Check:
enumerated() returns ordered index-element tuples [OK]

Quick Trick: enumerated() keeps order using tuples, not dictionaries [OK]

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