University of Colombo School of Computing — BIT External Degree

EN6106 — Emerging Topics in IT
Topic 6: Extended Reality

Practice MCQ Paper | Academic Level III — Semester 6

Questions: 25 MCQs

Total Marks: 100

Duration: 1 Hour

Pass Mark: 40 / 100

Penalty: Yes

Important Instructions

This paper has 25 questions covering all sub-topics of Lesson 6: Extended Reality, including the WebXR practical tutorial.
Each question has 5 choices with ONE OR MORE correct answers.
All questions carry equal marks (4 marks each, total 100 marks).
There is a penalty for incorrect responses to discourage guessing.
To PASS, you must score at least 40 marks out of 100.
Click Submit Paper only when you have answered all questions.

Marking Scheme (per question — max 4 marks)

Score = [ (Correct choices selected ÷ Total correct choices) − (Wrong choices selected ÷ Total wrong choices) ] × 4
Minimum score per question = 0 | Maximum = 4.00

Answered 0 / 25

Score: —

6.1 — Introduction to Extended Reality

Q 01What is/are true regarding Extended Reality (XR)?4 marks

(a)It is an umbrella term that includes all real-and-virtual combined environments.

(b)It is a subset of Artificial Intelligence.

(c)It includes Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR).

(d)It refers only to Virtual Reality headsets.

(e)Augmented Virtuality is also part of the broader XR spectrum.

Question score:—

Q 02What are the three main ingredients used to conceptually explain how XR works?4 marks

(a)Display — to show digital content (phone screen, headset, glasses).

(b)Sensors — to understand where you are, what you see, or how you move.

(c)Content — the virtual 3D models, images, videos, or animations you experience.

(d)Cloud storage.

(e)Blockchain.

Question score:—

Q 03What is/are the role(s) of Sensors in an XR system?4 marks

(a)To show digital content on a screen.

(b)To understand where you are.

(c)To understand what you see.

(d)To understand how you move.

(e)To store the virtual 3D models.

Question score:—

6.2 — Reality Virtuality Continuum

Q 04What is/are true about the Reality-Virtuality Continuum?4 marks

(a)It was introduced by Paul Milgram and Fumio Kishino.

(b)It was introduced in 1994.

(c)It was introduced in 2004 by Mark Zuckerberg.

(d)It was introduced to help categorize Mixed Reality (MR) technologies.

(e)It describes only completely real environments, excluding any virtual variations.

Question score:—

Q 05Which of the following are positioned along the Reality-Virtuality Continuum?4 marks

(a)Virtual reality

(b)Augmented reality

(c)Mixed reality

(d)Augmented virtuality

(e)Cloud computing

Question score:—

6.3 — Comparison between AR / VR / MR / AV

Q 06What is/are characteristic(s) of Virtual Reality (VR)?4 marks

(a)100% digital, immersive world.

(b)No real-world view or interaction unless added intentionally.

(c)Real world combined with digital overlays.

(d)Example: Oculus Quest games.

(e)Example: Tilt Brush.

Question score:—

Q 07What is/are characteristic(s) of Augmented Reality (AR)?4 marks

(a)Real world + digital overlays.

(b)100% digital immersive world with no real-world view.

(c)Example: Pokémon GO.

(d)Example: Instagram filters.

(e)Example: AR wayfinding.

Question score:—

Q 08What is/are characteristic(s) of Mixed Reality (MR)?4 marks

(a)Interacting with both real and virtual elements.

(b)Digital objects are aware of and respond to the real world.

(c)Example: Microsoft HoloLens.

(d)Purely virtual, with no awareness of the real world.

(e)You can walk around a digital model placed in the real world.

Question score:—

Q 09What is/are characteristic(s) of Augmented Virtuality (AV)?4 marks

(a)Mostly virtual, but includes real-world elements.

(b)Example: real-time webcam feed projected inside a VR classroom.

(c)A completely real environment with no digital content.

(d)Real world with digital overlays added on top.

(e)Real-time video or sensor data projected inside the virtual world.

Question score:—

Q 10Which of the following correctly pairs an XR type with its real-world example, as taught in the lecture?4 marks

(a)VR — Oculus Quest games.

(b)AR — Pokémon GO.

(c)MR — Using HoloLens to manipulate a 3D object in a room.

(d)AV — Pokémon GO.

(e)VR — Instagram filters.

Question score:—

6.4 — Applications of Augmented Reality

Q 11Which real-world example(s) correspond specifically to Augmented Reality (AR)?4 marks

(a)Snapchat filters.

(b)Pokémon GO.

(c)AR wayfinding.

(d)Tilt Brush.

(e)Walking around a digital model using HoloLens.

Question score:—

Q 12Which of the following are XR use cases mentioned for Retail and Architecture & Real Estate?4 marks

(a)Virtual try-ons.

(b)Interactive product demos.

(c)Virtual property tours.

(d)Exposure therapy.

(e)Virtual classrooms.

Question score:—

6.5 — Applications of Virtual Reality

Q 13Which of the following are XR use cases related to Education & Training and Gaming & Entertainment?4 marks

(a)Virtual classrooms.

(b)Simulations (e.g., surgery, aviation).

(c)Immersive games.

(d)Virtual concerts.

(e)Virtual property tours.

Question score:—

Q 14What is/are true about the Healthcare use case of XR?4 marks

(a)Anatomy visualization.

(b)Exposure therapy.

(c)Virtual try-ons.

(d)Virtual concerts.

(e)Interactive product demos.

Question score:—

6.6 — Applications of Augmented Virtuality

Q 15Which of the following best matches an example of Augmented Virtuality (AV)?4 marks

(a)A VR simulation where real-time webcam or sensor data is projected inside the virtual world.

(b)Playing a fully digital VR game with no real-world data.

(c)Viewing Instagram filters over a live camera feed.

(d)Using HoloLens to manipulate a hologram in your living room.

(e)Seeing real-time sensor data appear inside a virtual classroom.

Question score:—

Q 16Across all XR use cases discussed in the lecture, which of the following pairings are correct?4 marks

(a)Healthcare — anatomy visualization.

(b)Retail — virtual try-ons.

(c)Architecture & real estate — virtual property tours.

(d)Gaming & entertainment — virtual concerts.

(e)Digital Forensics — chain of custody.

Question score:—

XR Interaction Models & Key Terms

Q 17Which of the following are valid XR interaction models and their typical usage, as per the lecture?4 marks

(a)Gaze-based — used in VR menus, mobile VR.

(b)Gesture-based — used in AR glasses, Quest.

(c)Controller-based — used in Oculus, SteamVR.

(d)Touch-based — used in mobile AR apps.

(e)Voice-based — used in all VR headsets.

Question score:—

Q 18Which XR interaction model lets a user select items using their eyes, and where is it typically used?4 marks

(a)Gaze-based.

(b)It is used in VR menus and mobile VR.

(c)Gesture-based.

(d)It uses hand tracking or swipe gestures.

(e)Controller-based.

Question score:—

Q 19Match the following key XR terms to their correct meanings.4 marks

(a)Immersion — feeling like you're "inside" the virtual space.

(b)Digital twin — a virtual copy of a real object or space.

(c)Spatial awareness — the system knows where you are or what you're pointing at.

(d)Interaction — a device used to see immersive content.

(e)Headset/Smart glasses — how you touch or control virtual things.

Question score:—

XR Toolchain, Platforms & SDKs

Q 20Which of the following tools/tasks are part of the XR toolchain as discussed in the lecture?4 marks

(a)Adobe Aero for design & prototyping (3D scenes, animations).

(b)WebXR API for web-based XR experiences.

(c)Unity as a full development platform.

(d)Amazon Sumerian for content hosting (shareable 3D models).

(e)Photoshop as a full XR development platform.

Question score:—

Q 21Which statement(s) about XR platforms and SDKs is/are correct?4 marks

(a)ARCore works on Android using Java, C++, and Unity.

(b)ARKit works on iOS using Swift, SceneKit, and RealityKit.

(c)WebXR works on the Web using JavaScript and WebGL.

(d)Unity XR only works on Android and no other platform.

(e)Unreal XR is cross-platform and uses Blueprint and C++.

Question score:—

Typical XR Development Workflow

Q 22Which of the following are steps in the typical XR development workflow described in the lecture?4 marks

(a)Design the scene and interaction.

(b)Build in engine (e.g., Unity, WebXR).

(c)Deploy to device/web.

(d)Test for performance & interaction quality.

(e)Publish exclusively to a physical retail store.

Question score:—

Practical — Web-based AR App Development with WebXR

Q 23In the WebXR AR app tutorial, what are the listed prerequisites?4 marks

(a)A modern web browser (Chrome, Firefox, or Safari) with WebXR support.

(b)A smartphone or tablet for AR viewing.

(c)A text editor such as VS Code or Sublime Text.

(d)Advanced knowledge of C++ and low-level graphics programming.

(e)Basic knowledge of HTML and JavaScript.

Question score:—

Q 24According to the tutorial's script.js, what does the code do?4 marks

(a)Checks whether WebXR is supported using navigator.xr.

(b)Starts an "immersive-ar" XR session when the Start AR button is clicked.

(c)Requests "hit-test" as a required feature for the AR session.

(d)Encrypts AR session data before sending it to a server.

(e)Adds an event listener for when the AR session ends.

Question score:—

Q 25Regarding hosting and testing the WebXR app, which statement(s) is/are correct?4 marks

(a)Netlify Drop allows drag-and-drop hosting of the project folder.

(b)Netlify generates a secure HTTPS link instantly.

(c)The latest version of Google Chrome on Android should be used, with the WebXR AR Module enabled.

(d)iOS fully supports WebXR natively.

(e)The WebXR Emulator extension in Chrome can simulate a mobile AR session on desktop for development.

Question score:—

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EN6106 — Emerging Topics in ITTopic 6: Extended Reality

Important Instructions

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EN6106 — Emerging Topics in IT
Topic 6: Extended Reality