Try and practice the latest NVIDIA : NCP-OUSD real questions & answers

Why is extract, transform, load (ETL) a useful design pattern for USD data exchange? Choose two.

• A. It ensures that all OpenUSD workflows use a standardized data structure, regardless of the original format.
• B. It guarantees that all data converted to OpenUSD is lossless and identical to the original format.
• C. It separates concerns, making it easier to maintain and adapt data exchange pipelines for different needs.
• D. It helps preserve the integrity of the original data format while allowing tailoring for different use cases.

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Consider a task where a Mesh prim needs to have its points property subdivided to achieve a higher quality of deformation. Which of the following is correct?

• A. Non-constant primvars like displayColor and UVs from the Mesh need to be updated as well, since it is responsibility of the process overriding the points to also provide valid values for other primvars.
• B. It is impossible to override the points property of the Mesh, since subdivision can only happen at rendertime through the subdivisionScheme attribute of the Mesh schema.
• C. Non-constant primvars like displayColor and UVs from the Mesh can be left unchanged, since USD handles the resize of the array values to match the points property automatically during composition.

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What will be the composed value of /World/Tree/Canopy.primvars:displayColor when you open stage.usda?
#usda 1.0
(
defaultPrim = "World"
metersPerUnit = 1.0
upAxis = "Z"
)
def Xform "World"
{
def Xform "Tree" (
variantSets = ["foliage_color"]
variants = { string foliage_color = "default" }
)
{
def Cone "Canopy" (
references = [ < /_base_foliage_color > ]
)
{
double3 xformOp:translate = (0, 0, 1.3)
token[] xformOpOrder = ["xformOp:translate"]
}
def Cylinder "Trunk"
{
color3f[] primvars:displayColor = [(0.2, 0.1, 0.05)]
double3 xformOp:scale = (0.4, 0.4, 0.4)
token[] xformOpOrder = ["xformOp:scale"]
}
variantSet "foliage_color" = {
"default" {
}
"evergreen" {
over "Canopy"
{
color3f[] primvars:displayColor = [(0.05, 0.15, 0.05)]
}
}
"orange" {
over "Canopy"
{
color3f[] primvars:displayColor = [(0.5, 0.3, 0.05)]
}
}
}
}
}
class "_base_foliage_color"
{
color3f[] primvars:displayColor = [(0.2, 0.75, 0.1)]
}

• A. [(0.2, 0.75, 0.1)]
• B. [(0.05, 0.15, 0.05)]
• C. [(0.5, 0.3, 0.05)]
• D. unset

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Considering the two files cars.usda and parkingLot.usda in the exhibit. When opening a stage with parkingLot.
usda as the root layer, you observed this prim hierarchy:
* ParkingLot
* car01
You expected this:
* ParkingLot
* car01
* chassis
parkingLot.usda:
#usda 1.0
(
upAxis = "Y"
)
def Xform "ParkingLot" (kind = "group")
{
def "car01" (references = @cars.usda@) {}
}
cars.usda:
#usda 1.0
(
upAxis = "Y"
)
def Xform "redCar" (kind = "component")
{
def Mesh "chassis" {}
}
def Xform "blueCar" (kind = "component")
{
def Mesh "chassis" {}
}
What are ways to fix this issue?

• A. Explicitly set the prim type for car01 in parkingLot.usda
• B. Add a target prim to the reference in parkingLot.usda
• C. Make the ParkingLot prim in parkingLot.usda an assembly kind
• D. Set the defaultPrim in cars.usda

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What is a key difference between referencing and sublayering?

• A. References cannot be reordered like sublayers.
• B. Referencing brings in a hierarchy rooted at a single prim, while sublayering brings in all of a layer's content.
• C. A prim can have many sublayers, but only one reference.
• D. References have a stronger strength ordering than sublayers.

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