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Which Swift collection type is unordered and does not allow duplicate elements?

easy📝 Conceptual Q1 of 15
iOS Swift - Swift Language Essentials
Which Swift collection type is unordered and does not allow duplicate elements?
ATuple
BArray
CSet
DDictionary
Step-by-Step Solution
Solution:

  1. Step 1: Understand collection types in Swift

    Array keeps order and allows duplicates, Dictionary stores key-value pairs, Tuple is fixed-size group of values.

  2. Step 2: Identify collection that is unordered and unique

    Set is unordered and automatically removes duplicates.

  3. Final Answer:

    Set -> Option C

  4. Quick Check:

    Unordered unique collection = Set [OK]
Quick Trick: Set stores unique items without order [OK]
Common Mistakes:
  • Confusing Array with Set
  • Thinking Dictionary stores single values
  • Assuming Tuple is a collection type

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