Hibernate Framework Hibernate Caching 2

Question 1

Which CacheConcurrencyStrategy is appropriate for read-only data?

Accepted Answer

READ_ONLY

Answer

READ_ONLY is the best strategy for immutable data as it offers the best performance with no lock overhead.

Question 2

What does the NONSTRICT_READ_WRITE cache strategy allow?

Accepted Answer

Occasional stale reads in exchange for better performance

Answer

NONSTRICT_READ_WRITE does not guarantee strict consistency, allowing brief windows of stale data for better throughput.

Question 3

How do you enable the query cache for a specific Hibernate query?

Accepted Answer

query.setCacheable(true)

Answer

Calling setCacheable(true) on a Query marks its results as eligible for storage in Hibernate's query cache.

Question 4

What property must be set to enable the Hibernate query cache?

Accepted Answer

hibernate.cache.use_query_cache=true

Answer

The hibernate.cache.use_query_cache property must be set to true to activate Hibernate's query result caching.

Question 5

What happens to the second-level cache when an entity is updated?

Accepted Answer

The cached entry for that entity is invalidated

Answer

When an entity is updated, Hibernate invalidates its specific entry in the second-level cache to prevent stale data from being served.

Hibernate Framework Practice Test