O Level PR-4 — Previous Year Practical Questions

Practical questions asked in previous exams.

3 PDFs + 3 video classes available — all free

1PR-4 Previous Year Practical QuestionsPractical programs asked in previous exams — try solving them yourself before checking the solutions.Open 2PR-4 Previous Year Practical Questions with SolutionsThe same previous year programs, with the components, wiring and Arduino code for each one.Open 3Previous Year Practical Questions — Complete Solved Set49-page solved set — components list, wiring diagram and Arduino code for every program.Open

Previous Year Practical Questions — Video Classes

3 free classes — tap any video to play it right here

19 Feb 2026 — NIELIT O Level PR-4 IoT Real Paper Solution 41:00

210 Feb 2026 — NIELIT O Level PR-4 IoT Real Paper Solution 36:52

311 Feb 2026 — O Level M4-R5.1 IoT Practical Question Paper & Solution 38:54

PR4 Home Video Classes Full Course

Run these Arduino sketches on a virtual board — free

No kit needed: wire a virtual Arduino Uno in the simulator and watch the LEDs, LCD and sensors respond to your sketch. Each explained project gives the code and the wiring.

Open Arduino simulator Arduino Projects explained Practice questions