Introduction:
Computer graphics is a fascinating field that brings the power of visuals to life. Whether it's the immersive world of video games, stunning animations, or realistic simulations, computer graphics plays a vital role in shaping our digital experiences. For students studying this captivating subject, viva examinations offer an opportunity to showcase their knowledge and understanding. In this blog post, we present 20 essential viva questions along with their concise answers, crafted in easy language to provide a solid foundation for acing computer graphics viva exams. So, let's dive into the realm of computer graphics and unravel the secrets behind captivating visual creations!
20 Best Viva Questions On Computer Graphics:-
Q: What is computer graphics?
A: Computer graphics is about creating and showing pictures or animations using a computer.
Q: What are the main parts of a computer graphics system?
A: The important parts are the input devices (like keyboard and mouse), processor, memory, output devices (such as monitor or printer), and display devices.
Q: What is rasterization and how does it work?
A: Rasterization is the process of converting shapes into small colored dots (pixels) for display on a screen. It works by deciding which pixels should be colored based on the shape's characteristics.
Q: What are 2D and 3D transformations in computer graphics?
A: 2D transformations change the position, size, and orientation of objects on a flat surface. 3D transformations do the same but also consider depth to represent objects in a 3D space.
Q: How are 2D and 3D graphics different?
A: 2D graphics are flat and represent objects on a surface, like drawings or icons. 3D graphics add depth and look more realistic, like in video games or movies.
Q: What is anti-aliasing and why is it important?
A: Anti-aliasing smoothens the jagged edges of lines and curves in graphics, making them look nicer and less pixelated.
Q: What are the types of shading models used in computer graphics?
A: The shading models include flat shading (coloring each polygon uniformly), Gouraud shading (blending colors smoothly across polygons), and Phong shading (calculating colors at each pixel for more realism).
Q: What is the graphics pipeline and what does it do?
A: The graphics pipeline is a series of steps that process graphical data to create images on the screen. It includes transforming objects, shading, and filling pixels.
Q: How does a computer graphics system create realistic lighting effects?
A: By using techniques such as ambient (general light), diffuse (scattered light), and specular (shiny reflections) lighting, the system simulates how light interacts with objects to make them look real.
Q: What is texture mapping and why is it important?
A: Texture mapping applies detailed images (textures) onto objects to make them look more realistic by adding surface details like colors, patterns, or textures.
Q: What are Bezier curves and how are they used in computer graphics?
A: Bezier curves are smooth curves defined by control points. They are used to create and manipulate smooth shapes and paths in computer graphics.
Q: What is the difference between ray tracing and rasterization?
A: Ray tracing accurately calculates how light interacts with objects, creating realistic reflections and shadows, while rasterization focuses on converting shapes into pixels quickly.
Q: Why are vector graphics better than raster graphics?
A: Vector graphics can be scaled without losing quality, whereas raster graphics can become pixelated when enlarged. Vector graphics are also easier to edit and can be made smaller in file size.
Q: What is depth buffering used for in 3D graphics?
A: Depth buffering helps determine which objects are visible and which are hidden based on their distance from the viewer, creating a sense of depth and realism.
Q: What is a polygon mesh in computer graphics?
A: A polygon mesh is a collection of points, edges, and faces that form the shape of a 3D object. It's like a wireframe model that defines the object's structure
Q: Why is texture compression important in computer graphics?
A: Texture compression reduces the memory needed to store textures while keeping visual quality intact. This allows for efficient storage and faster rendering of textured objects.
Q: What is the role of the Z-buffer in hidden surface removal?
A: The Z-buffer stores the depth information of each pixel on the screen. It helps determine which objects or surfaces should be visible and which should be hidden based on their distance from the viewer.
Q: How does computer graphics handle transparency in images?
A: Transparency is achieved by assigning an opacity value to each pixel, specifying how much it should blend with the background. This creates the effect of seeing through objects.
Q: What is the purpose of rendering techniques like ray tracing or scanline rendering?
A: Rendering techniques like ray tracing or scanline rendering are used to generate realistic images by calculating lighting, shadows, reflections, and other effects to make the scene look more natural.
Q: What is a GPU and why is it important in computer graphics?
A: A GPU (Graphics Processing Unit) is a specialized processor designed for rendering graphics. It performs complex calculations required for fast and efficient display of images and animations on the screen.
Conclusion:
In this blog post, we covered 20 important viva questions on computer graphics. From understanding the basics of computer graphics to exploring advanced topics like lighting, shading, and texture mapping, these questions provided a solid foundation for success in viva examinations. By mastering these concepts, students can gain a comprehensive understanding of how visuals are created and displayed on a computer screen. With this knowledge, they can confidently delve into the exciting world of computer graphics and unlock endless possibilities for creative expression and innovation.
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