How does cache expiration work?

Can you explain how cache expiration works?

Sure! Cache expiration is a mechanism that determines how long cached data is considered valid before it needs to be refreshed or removed.

What are the different types of cache expiration policies?

There are several types, including time-based expiration, where data expires after a set time, and event-based expiration, which triggers when certain conditions are met.

How does time-based expiration work in practice?

In time-based expiration, you set a specific duration for how long the cached data should be stored. After this time, the cache is invalidated, and the data is fetched again from the source.

What happens if the cache expires and the data source is unavailable?

If the cache expires and the data source is unavailable, the application may return an error or stale data, depending on how it's configured to handle such situations.