Protocol inheritance in Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a protocol named Vehicle.

Swift

protocol [1] {
    func startEngine()
}

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AVehicle

BStartable

CEngine

DCar

Attempts:

3 left

💡 Hint

Common Mistakes

Using a class name instead of a protocol name.

Using a lowercase name for the protocol.

The protocol is named Vehicle to represent a general vehicle type.

2fill in blank

medium

Complete the code to make Car protocol inherit from Vehicle.

Swift

protocol Car: [1] {
    func openTrunk()
}

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AStartable

BVehicle

CDriveable

DEngine

Attempts:

3 left

💡 Hint

Common Mistakes

Using a protocol that is unrelated to Vehicle.

Forgetting to use a colon for inheritance.

The Car protocol inherits from Vehicle to extend its requirements.

3fill in blank

hard

Fix the error in the protocol inheritance declaration.

Swift

protocol ElectricCar [1] Car {
    func chargeBattery()
}

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A:

Binherits

Cextends

Dimplements

Attempts:

3 left

💡 Hint

Common Mistakes

Using words like 'inherits' or 'extends' instead of a colon.

Missing the colon entirely.

In Swift, protocol inheritance uses a colon : not words like 'inherits' or 'extends'.

4fill in blank

hard

Fill both blanks to create a protocol HybridCar that inherits from Car and ElectricCar.

Swift

protocol HybridCar [1] Car [2] ElectricCar {
    func switchPowerMode()
}

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A:

B,

Cinherits

Dextends

Attempts:

3 left

💡 Hint

Common Mistakes

Using words like 'inherits' or 'extends' instead of symbols.

Forgetting the comma between protocols.

Use a colon to start inheritance and commas to separate multiple protocols.

5fill in blank

hard

Complete the code to define a protocol FlyingCar that inherits from Car, ElectricCar, and Flyable.

Swift

protocol FlyingCar : Car, [1] , Flyable {
    func fly()
}

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A:

B,

CFlyable

DElectricCar

Attempts:

3 left

💡 Hint

Common Mistakes

Using words instead of symbols for inheritance.

Incorrect order or missing commas between protocols.

Start inheritance with a colon, then list protocols separated by commas.