Unreal Engine Quality Control & Assurance 4

Question 1

In Unreal Engine, which command-line argument enables automated testing without a display, useful for headless CI servers?

Accepted Answer

-NullRHI

Answer

'-NullRHI' initializes the engine with a null rendering backend, allowing automation tests to run on servers without a GPU or display.

Question 2

What does the 'Derived Data Cache (DDC) miss rate' metric tell QA engineers about a project's build pipeline health?

Accepted Answer

How frequently assets must be rebuilt from source because cached derived data is absent or stale

Answer

A high DDC miss rate means the cache is cold or misconfigured, causing assets to rebuild from scratch and dramatically slowing iteration and CI times.

Question 3

Which Unreal Engine feature allows QA to mark specific actors or components as 'expected to fail' in automated visual regression tests?

Accepted Answer

Automation Spec exclusion tags

Answer

Automation Spec tests support exclusion tags that mark known-failing tests or scenarios, preventing them from blocking CI while the underlying issue is tracked.

Question 4

When validating Physics Asset ragdolls in Unreal Engine, which QA step catches interpenetrating collision bodies?

Accepted Answer

Using the Physics Asset editor's collision visualization and overlap detection tools

Answer

The Physics Asset editor has built-in tools to visualize and detect overlapping collision bodies, which cause explosive physics behavior at runtime.

Question 5

A QA engineer notices that a packaged UE5 game has much larger file sizes than expected. Which tool should they use first to investigate?

Accepted Answer

Cook log with '-LogCookerStatistics' or the Asset Audit Size Map

Answer

The cook log with statistics flags or the Asset Audit Size Map reveals which assets contributed most to the build size, guiding optimization.

Unreal Engine Practice Test

Unreal Engine Practice Test

Unreal Engine Quality Control & Assurance 4