Unreal Engine Unreal Engine 2

Question 1

Which rendering path in Unreal Engine 5 uses a fully dynamic global illumination system based on voxel cone tracing and screen-space techniques?

Accepted Answer

Lumen

Answer

Lumen is UE5's dynamic global illumination system that provides real-time indirect lighting without baking.

Question 2

In Unreal Engine, what is the purpose of a 'Gameplay Tag'?

Accepted Answer

A hierarchical string identifier used to classify actors and abilities

Answer

Gameplay Tags are hierarchical string identifiers (e.g., 'Ability.Jump') used to classify and query game objects without hardcoded enums.

Question 3

What does the 'volatile' keyword do when applied to a replicated property in Unreal Engine's networking system?

Accepted Answer

Forces the property to replicate every tick regardless of change

Answer

Marking a replicated property with UPROPERTY(ReplicatedUsing=...) alongside the correct RepNotify forces retransmission; 'volatile' in the context means no delta compression.

Question 4

In Unreal Engine's Material Editor, what is the difference between 'Masked' and 'Translucent' blend modes?

Accepted Answer

Masked uses hard cutoff opacity while Translucent supports smooth semi-transparency

Answer

Masked clips pixels at a threshold (binary), while Translucent allows partial transparency with smooth gradients but at higher rendering cost.

Question 5

Which Unreal Engine subsystem is responsible for managing the lifecycle of UObjects and preventing memory leaks?

Accepted Answer

The Garbage Collector

Answer

UE's Garbage Collector tracks all UObject references and destroys objects with no strong references, preventing memory leaks.

Unreal Engine Practice Test

Unreal Engine Practice Test

Unreal Engine Unreal Engine 2