Will this entity be loaded into the first-level cache after the save operation?

In JPA (for example, Hibernate), after calling the save method, the entity usually becomes managed and is placed in the first-level cache (the session cache of EntityManager). This means that after saving, the object is available in the current session context, and any changes to it will be tracked and synchronized with the database upon commit or flush.

Example:

EntityManager em = ...;
EntityTransaction tx = em.getTransaction();
tx.begin();
MyEntity entity = new MyEntity();
em.persist(entity); // entity is now in the first-level cache
// changes to entity will be tracked
tx.commit();

Exceptions may occur if the save is performed outside the session context or if the merge method is used, which returns a new managed instance, leaving the original detached.