How can you use protocol inheritance to create a protocol FlyingVehicle that requires all Vehicle protocol requirements plus a method fly()?

hard📝 Application Q9 of 15

iOS Swift - Swift Language Essentials

How can you use protocol inheritance to create a protocol FlyingVehicle that requires all Vehicle protocol requirements plus a method fly()?

Aprotocol FlyingVehicle implements Vehicle { func fly() }

Bprotocol FlyingVehicle { inherit Vehicle; func fly() }

Cprotocol FlyingVehicle extends Vehicle { func fly() }

Dprotocol FlyingVehicle: Vehicle { func fly() }

Step-by-Step Solution

Solution:

Step 1: Recall Swift syntax for protocol inheritance
Swift uses colon (:) to indicate a protocol inherits from another protocol.
Step 2: Check method addition
The new protocol adds the method fly() as required.
Step 3: Evaluate options
protocol FlyingVehicle: Vehicle { func fly() } correctly uses colon and adds fly(). Other options use invalid keywords.
Final Answer:
protocol FlyingVehicle: Vehicle { func fly() } -> Option D
Quick Check:
Protocol inheritance uses ':' syntax [OK]

Quick Trick: Use ':' to inherit protocols in Swift [OK]

Common Mistakes:

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