Appendix E: XR Interview Questions, Model Answers, and Practical Exercises

Appendix E

XR Interview Questions, Model Answers, and Practical Exercises

This appendix is designed to support academic assessment, campus placements, technical interviews, and skill evaluation in Extended Reality (XR).

---

E.1 BASIC XR INTERVIEW QUESTIONS

Q1. What is Extended Reality (XR)?

Answer:
Extended Reality (XR) is an umbrella term that includes Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR). It represents technologies that blend real and digital environments to create immersive experiences.

---

Q2. Differentiate between VR, AR, and MR.

Feature	VR	AR	MR
Real world visible	❌	✅	✅
Digital overlay	Full	Partial	Interactive
Interaction with real world	❌	Limited	High

---

Q3. What are common XR applications?

Answer:
Education, healthcare, gaming, manufacturing, retail, defense, tourism, and remote collaboration.

---

E.2 INTERMEDIATE XR QUESTIONS

Q4. What is SLAM in AR?

Answer:
SLAM (Simultaneous Localization and Mapping) allows devices to map the environment and track their position in real time.

---

Q5. What causes cybersickness?

Answer:
Latency, low frame rate, mismatch between visual motion and physical movement.

---

Q6. What is OpenXR?

Answer:
An open standard that allows cross-platform XR development without device-specific coding.

---

E.3 ADVANCED XR INTERVIEW QUESTIONS

Q7. How is AI used in XR?

Answer:
AI enhances object recognition, hand tracking, speech interaction, environment understanding, and adaptive user experiences.

---

Q8. What are Digital Twins?

Answer:
Digital twins are virtual replicas of physical objects or systems used for simulation, monitoring, and optimization.

---

Q9. Explain ethical concerns in XR.

Answer:
Privacy, data security, psychological effects, accessibility, and digital addiction.

---

E.4 CODING & PRACTICAL QUESTIONS

Q10. Which programming languages are used in XR?

• C# (Unity)

• C++ (Unreal Engine)

• JavaScript (WebXR)

• Python (AI + XR integration)

---

Q11. Simple XR Project Ideas

• Virtual classroom

• AR museum guide

• VR fire safety training

• AR product visualization

---

E.5 PRACTICAL EXERCISES

Exercise 1:

Create a simple VR scene using Unity and XR Interaction Toolkit.

Exercise 2:

Build an AR app that displays 3D objects using ARCore or ARKit.

Exercise 3:

Design a UX flowchart for an XR learning application.

---

E.6 EXAM-ORIENTED SHORT QUESTIONS

• Define XR.

• What is presence in VR?

• State two advantages of AR.

• What is hand tracking?

• What is haptic feedback?

---

E.7 SUMMARY

This appendix equips learners and professionals with interview readiness, conceptual clarity, and hands-on practice in XR technologies.

---

✅ CURRENT APPENDICES STATUS

✔ Appendix A – XR Hardware & Software Cheat Sheet
✔ Appendix B – XR Development Tools & SDKs
✔ Appendix C – XR Case Studies
✔ Appendix D – XR Glossary
✔ Appendix E – XR Interview Questions & Exercises