Explanation
The correct answer is C and D, because they are both statements that describe an HEC token. An HEC token is a unique identifier that is used to authenticate and authorize data sent to Splunk via the HTTP Event Collector (HEC). An HEC token is a GUID (globally unique identifier), which is a 32-character hexadecimal string that is randomly generated. An HEC token can be created in Splunk Web or using REST endpoints, depending on the preference of the user. An HEC token does not map to a Splunk user, but to a specific index or set of indexes where the data will be stored. An HEC token cannot be used to download data, but only to send data to Splunk.

Explanation
The reserved field names in a KV Store are _key and _user. The _key field is a unique identifier for each record in a KV Store collection, and the _user field is the owner of the record. The other fields are not reserved, and can be used as custom fields in a KV Store collection. For more information, see KV Store field names.

Explanation
The endpoint that is used to authenticate with the Splunk REST API is /services/auth/login. This endpoint returns a session key that can be used for subsequent requests to the Splunk REST API. The other endpoints are either invalid or used for different purposes. For more information, see Authenticate with the Splunk REST API.

Explanation
The correct answer is A, B, and D, because they are all items that can be configured in inputs.conf. Inputs.conf is a configuration file that defines how Splunk ingests data from various sources, such as files, directories, network ports, scripts, or modular inputs. A modular input written in Python is a type of input that allows Splunk to ingest data from a custom source using a Python script. A file input monitoring a JSON file is a type of input that allows Splunk to monitor a file or directory for new or updated data in JSON format. An HTTP Event Collector as receiver of data from an app is a type of input that allows Splunk to receive data from an app via HTTP or HTTPS requests. A custom search command written in Python is not an item that can be configured in inputs.conf, but in commands.conf.