If you are not certain that a matching row exists in the database then which method is the best ?
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a) Session.load();
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b) Session.get();
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c) Session.fetch();
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d) None of the above
Session.get() is the better choice when you're uncertain whether a row exists. The get() method returns null if no matching row is found, allowing you to handle the absence gracefully. In contrast, Session.load() assumes the row exists and throws an ObjectNotFoundException if it doesn't, which would cause an uncaught exception in your code. Option B is correct. Options C and D are incorrect because there's no Session.fetch() method in standard Hibernate, and load() would cause an exception.
To answer this question, you need to understand the different methods used to retrieve data from a database using the Hibernate framework.
Option A) Session.load() - This option is incorrect because the load() method in Hibernate throws an exception if the matching row does not exist in the database. It assumes that the requested data will always be present in the database.
Option B) Session.get() - This option is correct because the get() method in Hibernate returns null if the matching row does not exist in the database. It does not throw an exception and provides a safe way to handle cases where the requested data may or may not be present.
Option C) Session.fetch() - This option is incorrect because there is no fetch() method in the Hibernate Session class. It is not a valid method.
Option D) None of the above - This option is incorrect because Option B (Session.get()) is the correct method to use when you are not certain that a matching row exists in the database.
The correct answer is B) Session.get(). This option is correct because it returns null if the matching row does not exist in the database, making it the best method to use when you are not certain about the presence of the data.