Distributed actors overview in Swift - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a distributed actor in Swift?

A distributed actor is a special kind of actor designed to work across different processes or machines, allowing safe and structured communication between them.

intermediate

How do distributed actors differ from regular actors in Swift?

Distributed actors can communicate across network boundaries and handle remote calls, while regular actors work only within the same process.

beginner

What keyword is used to declare a distributed actor in Swift?

The keyword distributed actor is used to declare a distributed actor.

intermediate

What is the role of the id property in distributed actors?

The id property uniquely identifies a distributed actor instance across the network, enabling remote references.

beginner

Why must distributed actor methods be asynchronous?

Because calls to distributed actors may involve network communication, their methods are asynchronous to handle delays and possible failures safely.

Which keyword declares a distributed actor in Swift?

A remote actor

B distributed actor

C network actor

D async actor

The correct keyword is distributed actor to declare a distributed actor.

What type of methods do distributed actors require for their remote calls?

A Synchronous methods

B Static methods

C Asynchronous methods

D Private methods

Distributed actor methods must be asynchronous because remote calls can take time and may fail.

What does the id property in a distributed actor represent?

A The actor's local memory address

B The actor's type name

C The actor's creation timestamp

D A unique identifier for the actor instance across the network

The id uniquely identifies the distributed actor instance across different machines.

Which of these is NOT a feature of distributed actors?

A Direct memory sharing between actors

B Remote method calls across machines

C Automatic network failure handling

D Safe concurrency within a single process

Distributed actors do not share memory directly; they communicate via messages over the network.

Why are distributed actors useful?

A They allow safe, structured communication between processes or machines

B They make synchronous calls faster

C They replace all network protocols

D They simplify writing concurrent code only on one device

Distributed actors help write code that communicates safely and clearly across different devices or processes.

Explain what distributed actors are and why they are important in Swift concurrency.

Think about how actors work locally versus across machines.

Describe the role of the id property in distributed actors and how it helps remote communication.

Consider how you find a friend in a big city using their unique address.