Provide concise model answers for each question (one to three paragraphs or steps per answer). Use commands and examples where useful (e.g., Windows certutil for checksums, fastboot/adb/SP Flash Tool commands). Keep answers actionable and focused. If you want, I can now produce the model answers for all questions as the Appendix. Which would you like?

Duration: 90 minutes. Total marks: 100. Instructions: Answer all questions. Show calculations/steps where applicable. Assume reasonable defaults if unspecified.

Appendix — Example answers / model solutions (for instructor use)