CAP 3220
Introduction to Computer Aided Modelling
Midterms Exam Review (Qns & Ans)
2025
1. What is the main purpose of NURBS in computer-aided
modeling?
A. To create low-polygon meshes for gaming
B. To represent complex freeform surfaces with mathematical
precision
C. To generate textures for 3D models
D. To perform collision detection in simulations
- ANS: B. To represent complex freeform surfaces with
mathematical precision
- Rationale: NURBS (Non-Uniform Rational B-Splines) are
used to define smooth, precise curves and surfaces in modeling.
©2025
,2. In computer-aided modeling, a "manifold mesh" is defined as
a mesh where:
A. All faces share a single vertex
B. Each edge is shared by exactly two faces
C. Textures are directly embedded in vertices
D. It is optimized for real-time rendering
- ANS: B. Each edge is shared by exactly two faces
- Rationale: A manifold mesh has a structure where every
edge belongs to two faces, ensuring model integrity.
3. Which of the following file formats is commonly used to
exchange 3D model data between CAD systems?
A. CSV
B. STL
C. GIF
D. EXE
- ANS: B. STL
- Rationale: STL (Standard Tessellation Language) is widely
used for sharing 3D models, particularly for 3D printing.
©2025
, 4. Which technique allows for the creation of simplified versions
of a model for level-of-detail rendering?
A. Retopology
B. Subdivision Surfaces
C. Texture Baking
D. Decimation
- ANS: D. Decimation
- Rationale: Decimation reduces polygon count, creating
simplified versions for different detail levels.
5. In the context of modeling, "Boolean operations" are used to:
A. Apply textures to objects
B. Combine, subtract, or intersect 3D objects
C. Animate models in real time
D. Reduce rendering times in CAD software
- ANS: B. Combine, subtract, or intersect 3D objects
- Rationale: Boolean operations manipulate 3D geometry by
combining or modifying intersecting shapes.
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©2025
Introduction to Computer Aided Modelling
Midterms Exam Review (Qns & Ans)
2025
1. What is the main purpose of NURBS in computer-aided
modeling?
A. To create low-polygon meshes for gaming
B. To represent complex freeform surfaces with mathematical
precision
C. To generate textures for 3D models
D. To perform collision detection in simulations
- ANS: B. To represent complex freeform surfaces with
mathematical precision
- Rationale: NURBS (Non-Uniform Rational B-Splines) are
used to define smooth, precise curves and surfaces in modeling.
©2025
,2. In computer-aided modeling, a "manifold mesh" is defined as
a mesh where:
A. All faces share a single vertex
B. Each edge is shared by exactly two faces
C. Textures are directly embedded in vertices
D. It is optimized for real-time rendering
- ANS: B. Each edge is shared by exactly two faces
- Rationale: A manifold mesh has a structure where every
edge belongs to two faces, ensuring model integrity.
3. Which of the following file formats is commonly used to
exchange 3D model data between CAD systems?
A. CSV
B. STL
C. GIF
D. EXE
- ANS: B. STL
- Rationale: STL (Standard Tessellation Language) is widely
used for sharing 3D models, particularly for 3D printing.
©2025
, 4. Which technique allows for the creation of simplified versions
of a model for level-of-detail rendering?
A. Retopology
B. Subdivision Surfaces
C. Texture Baking
D. Decimation
- ANS: D. Decimation
- Rationale: Decimation reduces polygon count, creating
simplified versions for different detail levels.
5. In the context of modeling, "Boolean operations" are used to:
A. Apply textures to objects
B. Combine, subtract, or intersect 3D objects
C. Animate models in real time
D. Reduce rendering times in CAD software
- ANS: B. Combine, subtract, or intersect 3D objects
- Rationale: Boolean operations manipulate 3D geometry by
combining or modifying intersecting shapes.
---
©2025
