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Why are collections like arrays and dictionaries value types in Swift?

easy📝 Conceptual Q11 of 15
Swift - Collections
Why are collections like arrays and dictionaries value types in Swift?
ATo make collections faster by using references
BTo allow collections to be shared easily between threads
CTo ensure each copy is independent and changes don't affect others
DTo prevent collections from being modified at all
Step-by-Step Solution
Solution:
  1. Step 1: Understand value type behavior

    Value types create a new copy when assigned or passed, so changes don't affect the original.
  2. Step 2: Apply to collections

    Collections as value types mean each copy is independent, preventing unexpected changes from shared data.
  3. Final Answer:

    To ensure each copy is independent and changes don't affect others -> Option C
  4. Quick Check:

    Value type = independent copies [OK]
Quick Trick: Value types copy data to avoid shared changes [OK]
Common Mistakes:
  • Thinking collections are reference types by default
  • Believing value types share data between copies
  • Confusing value types with immutability

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