Unreal Engine Case Studies & Practical Application 4

Question 1

A horror game needs doors that open procedurally based on player approach direction. Which Unreal system provides the cleanest solution?

Accepted Answer

Use a Timeline in Blueprint triggered by an overlap event, driven by relative player angle

Answer

A Blueprint Timeline on overlap gives smooth, data-driven rotation control and allows angle-based direction logic without per-frame polling.

Question 2

A studio ships a live-service game and needs to hotfix a game-balance value without a full client update. What Unreal Engine feature enables this?

Accepted Answer

Use Unreal Engine's Data Registry or a remote Config Drive to fetch live data

Answer

A remote data backend (Data Registry with a cloud source or custom Config fetch) lets balance values update at runtime without a client patch.

Question 3

A co-op game needs item pickups that disappear for the player who picked them up but remain for others. What networking pattern achieves this?

Accepted Answer

Set the item's mesh visibility using a client RPC only for the picker

Answer

A Client RPC targets only the owning connection, hiding the item locally while it remains replicated and visible to other players.

Question 4

A developer profiling an Unreal project in PIE notices the Game Thread takes 12 ms per frame. Which tool shows per-Blueprint function cost?

Accepted Answer

Unreal Insights Timeline with CPU track and Blueprint instrumentation

Answer

Unreal Insights captures named CPU scopes including Blueprint function execution, showing exact durations on the Game Thread timeline.

Question 5

A puzzle game requires objects to be picked up and precisely placed on targets. Which Unreal component is best for smooth physics-based carry?

Accepted Answer

PhysicsHandleComponent with interpolation settings tuned

Answer

PhysicsHandleComponent uses a physics spring to smoothly drag a simulated body toward a target location, preventing tunneling and interpenetration.

Unreal Engine Practice Test