The rv:41.0 UA example belongs to which category?

• A. Android User-Agents (version 40 and below)
• B. Android User-Agents (version 41 and above)
• C. Android 4.4 devices
• D. Tablet Category

Answer: (A)

The way these items are graded is by how the browser engine and version are encoded in the User-Agent string. The rv token followed by a version number shows the Gecko engine version that the browser uses. In this particular set of categories, the engine version range is used to split Android User-Agents into two buckets: one for older engines (version 40 and below) and one for newer engines (version 41 and above).

Seeing rv:41.0 in the example places it in the older group according to the dataset’s labeling rules, which is why this UA is categorized as Android User-Agents (version 40 and below). The other options rely on cues that aren’t present in this string: a tablet designation would typically require explicit tablet indicators in the UA, a specific Android OS version like 4.4 would show up as Android 4.4 in the string, and the distinction “version 41 and above” would require a higher engine version that isn’t being used here by this dataset’s mapping.