What is open data?

• A. Open data are datasets that require paid access
• B. Open data are publicly accessible data repositories that enable transparency, reproducibility, and new analyses
• C. Open data are only for government use
• D. Open data are any data with no metadata

Answer: (B)

The main idea being tested is what open data means and why it matters. Open data are datasets that are publicly accessible and can be freely used, reused, and redistributed by anyone, often housed in public data repositories. This openness is what enables transparency, reproducibility, and the opportunity for new analyses and discoveries since researchers, journalists, developers, and others can verify results, build on existing data, and combine datasets in innovative ways. Open data are typically shared with a license that allows reuse and are provided in machine‑readable formats with metadata that explains what the data cover, how they were collected, and any known limitations.

Seeing open data as free to access distinguishes it from data that require payment. Limiting data to government use misses the broader audience and collaborative potential of open data. And data lacking metadata would hinder understanding and reuse, which defeats the purpose of openness.