Online Access Free NCP-OUSD Practice Test

Which of the following statements best describes the purpose of OpenUSD file format plugins?

• A.They convert OpenUSD files to other formats without any loss of data or information.
• B.They are designed to compress OpenUSD asset files for faster loading times.
• C.They extend OpenUSD's functionality by allowing it to read and write from various file formats.
• D.They are only used for visualizing OpenUSD data and geometry in 3D applications.

Which of the following are valid principles of asset structure? Choose three.

• A.Modularity
• B.Redundancy
• C.Compressability
• D.Navigability
• E.Legibility

Another department at your company has provided layer1.usda that has a Sphere Gprim with animated timeValues that translate the sphere along the Y-axis:
#usda 1.0
(
endTimeCode = 60
startTimeCode = 1
)
def Xform "Asset"
{
def Sphere "Sphere"
{
double3 xformOp:translate.timeSamples = {
1: (0, 5.0, 0)
30: (0, -5.0, 0)
60: (0, 5.0, 0)
}
uniform token[] xformOpOrder = ["xformOp:translate"]
}
}
You've been given rootLayer.usda that references Sphere from layer1.usda as follows:
#usda 1.0
(
endTimeCode = 60
startTimeCode = 1
)
def Xform "World"
{
def Sphere "Sphere" (
prepend references = @./layer1.usda@ < /Asset/Sphere >
)
{
}
}
For testing purposes, you want to check what Sphere would look like if it was at (0, -5.0, 0) at timeCode = 45.
Which of the following changes in rootLayer.usda would place Sphere at -5.0 in the Y-axis at timeCode 45?
Note that it is okay if the position of Sphere at other timeCodes is changed. Choose two.

• A.Add a 15 timeCode frame layer offset to the Sphere reference:
  def Sphere "Sphere" (
  prepend references = @./layer1.usda@ < /Asset/Sphere > (offset = 15)
  )
  {
  }
• B.Add a (0, -5, 0) translate xformOp timeValue to "World" at timeCode 45:
  def Xform "World"
  {
  double3 xformOp:translate.timeSamples = {
  45: (0, -5.0, 0),
  }
  uniform token[] xformOpOrder = ["xformOp:translate"]
  }
• C.Change the layer metadata endTimeCode from 60 to 45:
  #usda 1.0
  (
  endTimeCode = 45
  startTimeCode = 1
  )
• D.Add the following xformOp overrides to "Sphere":
  double3 xformOp:translate.timeSamples = {
  1: (0, 5.0, 0),
  30: (0, -2.5, 0),
  60: (0, -5.0, 0)
  }
  uniform token[] xformOpOrder = ["xformOp:translate"]

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?

• A.Include explicit definitions of all prims, properties, and relationships exactly matching the imported asset to ensure consistency.
• B.Overs of the prims and properties that have been modified or added, omitting unchanged data.
• C.Export each prim separately into multiple layers, and reference them individually to maintain sparsity.

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))

• A.There are no composition arcs so the instanceable metadata is ignored.
• B.Every sphere has a different position so the instanceable metadata is ignored.
• C.You must also call Usd.Prim.SetInstanceable(True) for each sphere prim that is created.