What does session.evict() method do ?
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a) remove the object and its collections from the first level cache
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b) remove the object and its collections from the second level cache
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c) remove the object and its collections from the data base
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d) None of the above
In Hibernate, evict() removes an object and its associated collections from the first-level cache (session cache). This detaches the object from the session, making changes no longer tracked. It does NOT affect second-level cache or the database.
To answer this question, you need to understand the concept of caching in Hibernate.
The session.evict() method is used to remove an object and its collections from the first level cache, also known as the session cache.
Option A) Remove the object and its collections from the first level cache - This option is correct. When the session.evict() method is called, the object and its collections are removed from the first level cache, which means that subsequent operations on the object will not be tracked by the cache.
Option B) Remove the object and its collections from the second level cache - This option is incorrect. The session.evict() method does not directly remove the object and its collections from the second level cache. The second level cache is a separate cache that is shared among multiple sessions.
Option C) Remove the object and its collections from the database - This option is incorrect. The session.evict() method does not delete the object and its collections from the database. It only removes them from the first level cache.
Option D) None of the above - This option is incorrect. The correct answer is option A.
Therefore, the correct answer is A) Remove the object and its collections from the first level cache. This option is correct because the session.evict() method is used to remove an object and its collections from the first level cache.