Unreal Engine Unreal Engine Networking & Multiplayer 2

Question 1

What does the UPROPERTY specifier 'Replicated' do in Unreal Engine C++?

Accepted Answer

Automatically synchronizes the property value from server to all clients

Answer

The Replicated specifier tells Unreal Engine to propagate that property's value from the server to all relevant clients whenever it changes.

Question 2

Which function must be overridden in a replicated C++ class to register which properties should be replicated?

Accepted Answer

GetLifetimeReplicatedProps

Answer

GetLifetimeReplicatedProps must be overridden and filled with DOREPLIFETIME macros to tell Unreal which properties to replicate and under what conditions.

Question 3

What is a Listen Server in Unreal Engine multiplayer?

Accepted Answer

A server that also runs a game client so the host can play

Answer

A Listen Server hosts the game and simultaneously runs a local game client, allowing the hosting player to participate directly in the session.

Question 4

What is the primary purpose of the DOREPLIFETIME macro in Unreal Engine?

Accepted Answer

To register a property for replication inside GetLifetimeReplicatedProps

Answer

DOREPLIFETIME registers a specific UPROPERTY inside GetLifetimeReplicatedProps so the engine knows to replicate it from server to clients.

Question 5

Which Unreal Engine subsystem provides high-level online services such as sessions, matchmaking, and achievements?

Accepted Answer

Online Subsystem

Answer

The Online Subsystem (OSS) is Unreal Engine's abstraction layer for platform-specific online services like Steam, Epic Online Services, and console SDKs.

Unreal Engine Practice Test

Unreal Engine Practice Test

Unreal Engine Unreal Engine Networking & Multiplayer 2