Unreal Engine Unreal Engine Networking & Multiplayer 3

Question 1

What does 'Seamless Travel' enable in Unreal Engine multiplayer?

Accepted Answer

Transitioning between levels without fully disconnecting and reconnecting clients

Answer

Seamless Travel uses an intermediate transition map to keep client connections alive during a level change, preventing the full disconnect-reconnect cycle of non-seamless travel.

Question 2

Which replication condition ensures a UPROPERTY is only sent to the actor's owning client and not all clients?

Accepted Answer

COND_OwnerOnly

Answer

COND_OwnerOnly restricts replication of a property so only the client that owns the actor receives updates, useful for private player data like ammo counts.

Question 3

What is the purpose of client-side 'Prediction' in a multiplayer game?

Accepted Answer

To simulate gameplay locally before server confirmation, reducing perceived latency

Answer

Client prediction lets the local machine immediately apply player actions (like movement) before the server confirms them, making the game feel responsive despite network latency.

Question 4

What is the key difference between a 'Reliable' and 'Unreliable' RPC in Unreal Engine?

Accepted Answer

Reliable RPCs are guaranteed to be received and executed; unreliable RPCs may be dropped

Answer

Reliable RPCs use acknowledgment and retransmission to guarantee delivery, while Unreliable RPCs are fire-and-forget and may be dropped under poor network conditions.

Question 5

Which Online Subsystem function call initiates the creation of a new multiplayer session in Unreal Engine?

Accepted Answer

CreateSession

Answer

CreateSession is called on the Session Interface to allocate a new online session, after which StartSession makes it joinable by other players.

Unreal Engine Practice Test

Unreal Engine Practice Test

Unreal Engine Unreal Engine Networking & Multiplayer 3