Find Interview Questions for Mechlin Technologies

Right Answer:
Intrinsic camera parameters define the internal characteristics of the camera, such as focal length and optical center, which affect how 3D points are projected onto the 2D image plane. Extrinsic camera parameters describe the camera's position and orientation in the 3D world, determining how the camera is situated relative to the scene being captured. Together, they are essential for accurately mapping 3D coordinates to 2D images in computer vision.

Right Answer:
3D vision refers to the ability of a system to perceive depth and spatial relationships in a three-dimensional space, allowing it to understand the shape, size, and position of objects. In contrast, 2D computer vision processes images as flat, two-dimensional representations, lacking depth information.

Right Answer:
Bundle adjustment is an optimization technique used in 3D reconstruction to refine the 3D coordinates of points and the camera parameters simultaneously. It minimizes the re-projection error between observed image points and projected 3D points, ensuring a more accurate and consistent 3D model. It is typically used after initial structure-from-motion processes to improve the quality of the reconstruction.

Right Answer:
LiDAR-based 3D mapping uses laser pulses to measure distances and create precise 3D models, providing high accuracy and detail, especially in complex environments. Vision-based 3D mapping relies on cameras and computer vision techniques to interpret images, which can be less accurate in low light or featureless areas but is often more cost-effective and easier to deploy.

Right Answer:
Common algorithms used for stereo matching include:

1. Block Matching
2. Semi-Global Matching (SGM)
3. Dynamic Programming
4. Graph Cuts
5. Belief Propagation
6. Deep Learning-based methods (e.g., Convolutional Neural Networks)

Right Answer:
Collision detection is the process of determining when two or more objects in a 3D game intersect or come into contact with each other. Collision response is the method used to react to those collisions, such as stopping movement, bouncing off, or triggering an event.

Right Answer:
Lighting and shadows enhance the visual quality in 3D games by adding depth, realism, and atmosphere. Proper lighting helps define shapes and highlights textures, while shadows create a sense of space and grounding for objects, making scenes more immersive and believable.

Right Answer:
A 3D game engine is a software framework designed to create and develop 3D video games. It provides tools and features for rendering graphics, handling physics, managing audio, and facilitating user input. The engine works by processing game assets (like models, textures, and sounds), executing game logic, and rendering scenes in real-time to create an interactive experience for players.

Right Answer:
The different types of camera systems used in 3D games include:

1. **First-Person Camera**: Provides a view from the player's perspective.
2. **Third-Person Camera**: Shows the player character from a distance, typically behind or above.
3. **Top-Down Camera**: Views the scene from directly above, often used in strategy games.
4. **Isometric Camera**: Offers a fixed angle view that simulates a 3D perspective on a 2D plane.
5. **Free Camera**: Allows the player to move the camera freely in any direction.
6. **Fixed Camera**: Remains in a set position, often used in specific scenes or cutscenes.
7. **Dynamic Camera**: Adjusts automatically based on player movement or actions to enhance gameplay.

Right Answer:
Meshes are 3D models made up of vertices, edges, and faces that define the shape of an object in a game. They are used in 3D games to represent characters, environments, and objects, allowing for realistic rendering and interaction within the game world.

Right Answer:
Agile ceremonies are recurring meetings within a sprint to facilitate communication, planning, and continuous improvement.

* **Sprint Planning:** The team decides what work to complete in the upcoming sprint. They discuss user stories, estimate effort, and define the sprint goal.

* **Daily Stand-up:** A brief daily meeting where the team shares progress, identifies roadblocks, and coordinates efforts. Each member typically answers: What did I do yesterday? What will I do today? Are there any impediments?

* **Sprint Review:** The team demonstrates the completed work to stakeholders, gathering feedback and ensuring alignment with expectations.

* **Sprint Retrospective:** The team reflects on the past sprint, identifying what went well, what could be improved, and defining action items to enhance future performance.

Right Answer:
Agile is an iterative and incremental approach to project management that focuses on collaboration, flexibility, and customer satisfaction. Unlike traditional, sequential (waterfall) methods, Agile embraces change throughout the project lifecycle through short development cycles called sprints.

Right Answer:
We prioritize features or tasks in an Agile sprint using a combination of factors like business value, risk, effort/size, dependencies, and urgency. Product Owner usually leads this, using techniques like MoSCoW (Must have, Should have, Could have, Won't have) or story pointing, to ensure the most valuable items are tackled first.

Right Answer:
* **Clear Sprint Goals:** Define specific, measurable, achievable, relevant, and time-bound (SMART) goals for each iteration.
* **Daily Stand-ups:** Facilitate short, focused daily meetings to identify roadblocks and coordinate efforts.
* **Sprint Backlog Management:** Keep the sprint backlog refined, prioritized, and realistic based on team capacity.
* **Timeboxing:** Adhere to time limits for meetings and tasks to prevent scope creep and maintain momentum.
* **Focus on Value:** Prioritize tasks that deliver the most business value within the iteration.
* **Remove Impediments:** Proactively identify and resolve obstacles that hinder the team's progress.
* **Limit Work in Progress (WIP):** Encourage the team to focus on completing tasks before starting new ones.
* **Continuous Feedback:** Regularly review progress, gather feedback, and adapt plans as needed.
* **Defined "Definition of Done":** Ensure a clear understanding of what it means for a task to be considered complete.
* **Team Collaboration & Communication:** Foster open and effective communication and collaboration within the team.

Right Answer:
A product backlog is a prioritized list of features, bug fixes, tasks, and requirements needed to build a product. It's managed through regular refinement, prioritization, estimation, and updates based on feedback and changing business needs, often facilitated by the Product Owner.