AQA Large Data Set Practice Test 2026 - Free AQA Practice Questions and Study Guide

When a dataset uses numeric codes to represent categories, not every number has to map to a real category. Some codes are reserved or left unused, meaning there is no defined value for them in the data dictionary.

For Keeper Title, the code in question has no assigned category in the dataset’s mappings. The metadata marks this particular code as Not used, so there are no records that correspond to it. That’s why it’s the best answer: there isn’t a real gender or title tied to that code, it simply doesn’t represent any value.

If you encountered this code in a record, you’d treat it as missing or not applicable rather than trying to assign Male, Female, or Unknown. The other options would only fit if there were an official mapping for that code, which isn’t the case here.