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| Certification Vendor: | NVIDIA |
|---|---|
| Exam Name: | NVIDIA-Certified Professional: OpenUSD Development (NCP-OUSD) |
| Exam Number: | NCP-OUSD |
| Exam Format: | Multiple-choice, Multiple-response |
| Real Exam Qty: | 60 - 70 |
| Exam Duration: | 90 - 120 |
| Certificate Validity Period: | 2 years |
| Passing Score: | Pass/Fail only, no specific score published |
| Available Languages: | English |
| Exam Price: | $200 USD |
| Recommended Training: | NVIDIA Deep Learning Institute (DLI) OpenUSD Courses |
| Exam Registration: | NVIDIA Certification Registration |
| Sample Questions: | NVIDIA NCP-OUSD Sample Questions |
| Exam Way: | Online, remotely proctored |
| Pre Condition: | 2โ3 years of hands-on experience with OpenUSD framework; proficiency in Python or C++ programming; or completion of official NVIDIA study materials |
| Official Syllabus URL: | https://www.nvidia.com/en-us/learn/certification/openusd-development-professional/ |
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NEW QUESTION # 40
Review the following code for creating 1000 sphere instances. When this code is executed, why will the authored prims not yield any instancing efficiencies?
for i in range(1000):
xform = UsdGeom.Xform.Define(stage, f"/test_{i}")
sphere_path = xform.GetPath().AppendPath("sphere")
UsdGeom.Sphere.Define(stage, sphere_path)
xform.GetPrim().SetInstanceable(True)
xform.AddTranslateOp().Set((i * 2, 0, 0))
Answer: A
Explanation:
The authored prims do not produce scenegraph-instancing efficiencies because the code authors local prim hierarchies directly under each /test_i prim rather than composing shared content through references, payloads, inherits, specializes, or variant arcs. NVIDIA's Learn OpenUSD scenegraph instancing guidance states that "Instancing is driven by your composition arcs" and explains that if there are no composition arcs on the instanceable prims, there is nothing from which OpenUSD can generate shared prototypes. ( docs.
nvidia.com )
Option A is correct because instanceable = true alone is not sufficient. OpenUSD scenegraph instancing works by sharing composed subgraphs brought in through composition arcs; in this code, every sphere is authored as a unique local child in the same layer stack. NVIDIA's Omniverse instancing guide states that if no composition arcs are directly authored on an instanceable prim, the prim behaves as if instanceable were false. ( docs.omniverse.nvidia.com ) Option B is incorrect because instance roots may vary by transform, primvars, and other root-level data while still sharing prototypes. Option C is incorrect because the child sphere is not the instance root; marking it instanceable would still not create shared prototypes without composition arcs. This aligns with Content Aggregation # Asset Modularity and Instancing # Scenegraph Instancing, Composition Arcs, Instance Roots, and Implicit Prototypes .
NEW QUESTION # 41
Changing stage upAxis from Y to Z often also requires:
Answer: A
Explanation:
Metadata alone doesn't rotate geometry; a corrective transform preserves visual orientation.
NEW QUESTION # 42
Why is it important to keep layer stacks manageable?
Answer: C
Explanation:
Large and complex stacks make resolving opinions slower and add performance costs.
NEW QUESTION # 43
To make only the sphere visible given the following scene, which prims need their visibility opinions updated? Choose three.
#usda 1.0
def Xform "World"
{
token visibility = "invisible"
def Xform "Xform"
{
def Scope "Scope"
{
token visibility = "invisible"
def Sphere "Sphere"
{
}
def Cube "Cube"
{
}
}
}
}
Answer: C,D,E
Explanation:
The visibility opinions that must be updated are on World , Scope , and Cube . In OpenUSD, visibility is hierarchical and pruning. UsdGeomImageable defines the visibility attribute with allowed values inherited and invisible; effective visibility is computed from the most ancestral authored invisible opinion. The OpenUSD API further states that MakeVisible() may need to override ancestor visibility and hide sibling branches to preserve the intended result. ( openusd.org ) In the given scene, /World is explicitly invisible, so the entire subtree is invisible regardless of descendants.
/World must therefore be changed to visible behavior, typically visibility = "inherited". /World/Xform/Scope is also explicitly invisible, so Scope must also be changed to inherited to allow its children to be evaluated as visible. Once those ancestor invisibility opinions are removed, both Sphere and Cube would become visible by inheritance. To make only the sphere visible, the Cube must receive an explicit visibility = "invisible" opinion. The sphere does not require an authored visibility opinion because it becomes visible through inheritance. This aligns with Visualization # UsdGeomImageable, Visibility, Hierarchical Pruning, and Effective Visibility Computation .
NEW QUESTION # 44
What is the primary purpose of traversing a stage in OpenUSD?
Answer: D
Explanation:
Traversing allows users to navigate and operate on prim hierarchies within a USD stage.
NEW QUESTION # 45
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