- Which devices support HealthKit?
a) The iPhone and iPad.
b) The iPhone, iPad, and Apple Watch.
c) The iPhone and Apple Watch.
- What's the difference between a quantity sample and a category sample?
a) Quantity samples have an arbitrary value, while categories use enums to represent their value.
b) Quantity samples take place over time, and category samples are static.
c) Category samples have more possibilities than quantity samples.
- How can you check whether you have read access to a certain health metric?
a) By requesting the authorization status for that metric.
b) By making a request. If the results are empty, you don't have access.
c) To protect the user's privacy, there is no way to be sure.
- How can you filter data that is returned from a HealthKit query?
a) With predicates
b) By using the built-in filters
c) By specifying the values...
