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What does a protocol in Swift define?

easy📝 Conceptual Q1 of 15
iOS Swift - Swift Language Essentials
What does a protocol in Swift define?
AA way to store data persistently
BA concrete implementation of a class
CA type of variable
DA blueprint of methods, properties, and other requirements
Step-by-Step Solution
Solution:
  1. Step 1: Understand the role of protocols

    Protocols define a set of rules or requirements that a type must follow, like methods or properties.
  2. Step 2: Differentiate protocols from classes and variables

    Protocols do not provide implementations or store data; they only specify what must be implemented.
  3. Final Answer:

    A blueprint of methods, properties, and other requirements -> Option D
  4. Quick Check:

    Protocol purpose = Blueprint [OK]
Quick Trick: Protocols specify required features, not implementations [OK]
Common Mistakes:
  • Confusing protocols with classes
  • Thinking protocols store data
  • Believing protocols are variables

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