NVIDIA NCP-OUSD復習過去問、NCP-OUSD出題範囲

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NVIDIA NCP-OUSD 認定試験の出題範囲：

トピック出題範囲
トピック 1
  • Data Modeling: Covers USD and Sdf data structures including prims, properties, primvars, value types, time samples, and built-in schemas.
トピック 2
  • Composition: Covers authoring, designing with, and debugging all composition arcs (LIVERPS), including understanding when and how to apply each arc in complex scenarios.
トピック 3
  • Customizing USD: Covers extending USD functionality through plugin development, including custom schemas, file format plugins, model kinds, and variant fallback selections.
トピック 4
  • Pipeline Development: Covers high-level pipeline design tasks including asset management, versioning, USD exporter hooks, build configurations, and dependency management.
トピック 5
  • Content Aggregation: Covers building modular, reusable components and using instancing strategies to efficiently assemble and override assets in large, optimized scenes.
トピック 6
  • Visualization: Covers working with UsdGeom, UsdShade, and UsdLux domains, including meshes, cameras, materials, and lights used across common USD workflows.
トピック 7
  • Debugging and Troubleshooting: Covers introspecting USD stages to resolve composition issues, fix poorly authored data, and optimize scene load and render performance.

>> NVIDIA NCP-OUSD復習過去問 <<

NVIDIA NCP-OUSD復習過去問: NVIDIA-Certified Professional: OpenUSD Development (NCP-OUSD) & 資格試験のリーダー

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NVIDIA-Certified Professional: OpenUSD Development (NCP-OUSD) 認定 NCP-OUSD 試験問題 (Q60-Q65):

質問 # 60
You are a developer creating an OpenUSD exporter for an application that also supports import of USD assets. To enable collaborative workflows, you're adding an "export as overrides" option.
Which approach correctly describes which structure your exporter should generate?

正解：C

解説：
The correct exporter behavior is to generate sparse overrides that represent only the authored contribution of the current workstream. In OpenUSD data exchange workflows, an exporter should not blindly rewrite the full imported asset when the intent is to preserve collaborative, non- destructive editing. Instead, the exporter should author only the changes required to express the current application's contribution: modified prims, newly added prims, changed attributes, relationships, metadata, or other authored opinions.
Option A is correct because an over is specifically used to contribute opinions to an existing prim without redefining the entire prim structure. This allows the exported layer to sit above the source asset in a layer stack and override only the relevant data. Option B incorrectly equates sparsity with splitting each prim into separate referenced layers; USD sparsity is achieved by authoring minimal opinions, not by unnecessary layer fragmentation. Option C is incorrect because exporting full definitions for every prim and property would duplicate unchanged data, reduce clarity, and undermine USD's composition-based collaboration model. This maps to the NVIDIA OpenUSD Development Study Guide topics Data Exchange, especially exporter design, data transformation, sparse authoring, and collaborative layer-based workflows.


質問 # 61
What UX problem does adding /World and setting defaultPrim=/World solve?

正解：D

解説：
It enables simple referencing and groups the whole asset under one ancestor.


質問 # 62
How can a Vec3d translation be authored?

正解：C

解説：
Gf.Vec3d creates a proper vector object for attributes.


質問 # 63
What is the main purpose of CreateAttribute()?

正解：C

解説：
It allows adding user-defined attributes outside the schema.


質問 # 64
You are debugging a complex scene composed of multiple layers. You notice that a property on a prim has an unexpected value. To understand where this value is coming from, you need to inspect the composition arcs affecting this prim. Which API would be most helpful in visualizing and analyzing the composition arcs for a specific prim?

正解：C

解説：
Usd.Property.GetPropertyStack() is the most appropriate choice because the debugging goal is to determine where a composed property value is coming from. In USD, a final property value can be affected by multiple authored opinions across sublayers, references, payloads, variants, inherits, specializes, and local overrides.
NVIDIA's Learn OpenUSD glossary defines a property stack as the ordered list of property specs that contribute values or metadata for a composed property, and notes that UsdProperty::GetPropertyStack() is specifically useful for debugging, not as the primary value-resolution mechanism. It also explains that USD resolves values by traversing composition information in strength order.
Option C is therefore correct because it exposes the contributing property specs and their layer origins, helping identify why a stronger opinion produced an unexpected result. Option A only traverses prims on the composed stage and does not explain value provenance. Option B reports aggregate stage statistics, not composition-source details. Option D exports the stage or layer contents but does not provide targeted diagnostic ordering for a property. This aligns with Debugging and Troubleshooting # Value Resolution, Property Stack, Composition Debugging, and Layer Opinion Inspection .


質問 # 65
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