How many lookup functions does Hiera provide?

Hiera provides multiple lookup functions to facilitate the retrieval of configuration data in a modular and structured manner. Specifically, it offers three primary lookup functions: lookup, get, and lookup_key. Each of these functions serves a different purpose and can be utilized in various scenarios depending on the needs of your Puppet configuration.

The lookup function allows users to retrieve data stored in Hiera backends, making use of the hierarchy defined for data searching. The get function is used for more straightforward data retrieval, defaulting automatically if no data is found. Lastly, lookup_key allows for a more granular look-up of data associated with a particular key. Understanding the diverse roles of these lookup functions enables Puppet users to efficiently manage and access their configuration data, ensuring that manifests are dynamic and adaptable.

The options representing fewer than three functions would be inadequate given the versatility and depth that Hiera provides. Therefore, the correct choice, highlighting the presence of three distinct lookup functions, aligns with Hiera's designed capability to optimize data lookup within Puppet configurations.