Backup the indexer data
Backup of both forwarder and Indexer data
Backup the search head data
Both (b) and (c)
Manually clear each file and force Splunk instance to reindex data
Delete the index and create the new one
"splunk clean eventdata -index _fishbucket"
None of the above
Both (a) and (b)
Add more space to index.
Add more space to the development server.
Add more Indexers
Both (a) and (c)
Splunk and search head
Splunkd and SplunkWeb
All of the above
Here's an interesting quiz for you.