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

Moving players between separate servers without logging out

Answer

Streaming open-world content without any load pause

Answer

Teleporting player pawns instantly across large maps

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_SimulatedOnly

Answer

COND_ServerOnly

Answer

COND_AutonomousOnly

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

To forecast server load and auto-scale instances

Answer

To predict NPC behavior using AI on each client independently

Answer

To preemptively resend packets estimated to be lost

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 are encrypted; unreliable RPCs are unencrypted

Answer

Reliable RPCs execute immediately; unreliable RPCs are deferred to the next frame

Answer

Reliable RPCs have higher bandwidth; unreliable RPCs are compressed

Question 5

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

Accepted Answer

CreateSession

Answer

StartSession

Answer

RegisterSession

Answer

HostSession

Question 6

What is the primary role of the NetDriver in Unreal Engine?

Accepted Answer

Handling low-level network communication including connections and packet processing

Answer

Managing the in-game network diagnostics UI

Answer

Enforcing game rules for online match integrity

Answer

Synchronizing audio events across all connected clients

Question 7

In Unreal Engine multiplayer, what does the 'Net Update Frequency' property on an actor control?

Accepted Answer

How many times per second the engine checks and sends replicated property changes for that actor

Answer

How often the actor requests new texture data from the server

Answer

The maximum bandwidth budget allocated to this actor

Answer

How often the actor's collision queries are validated over the network