UPSC CSE Prelims

Correct Option: D (1, 2, 3 and 4) Explanation: Aarogya Setu, CoWIN, DigiLocker and DIKSHA draw upon reusable/open technology stacks or have open-source components in their digital public-service architecture. Statement / Pair / Item-wise Analysis: 1. True / qualifies - Aarogya Setu released parts of its code as open source. 2. True / qualifies - CoWIN was offered as a scalable open digital vaccination platform. 3. True / qualifies - DigiLocker uses interoperable open digital infrastructure and published components. 4. True / qualifies - DIKSHA is built on the open-source Sunbird learning platform. Option-wise Analysis: A. Incorrect-omits 3 even though DigiLocker uses interoperable open digital infrastructure and published components.; omits 4 even though DIKSHA is built on the open-source Sunbird learning platform. B. Incorrect-omits 1 even though Aarogya Setu released parts of its code as open source. C. Incorrect-omits 2 even though CoWIN was offered as a scalable open digital vaccination platform. D. Correct-selects exactly the correct statements/items identified above. Review note: “Built on top of open-source digital platforms” can encompass open components and standards, not necessarily every production component being public source.