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| Hibernate - Interview Questions and Answers for 'Hcl' - 10 question(s) found - Order By Newest | ||||
 Frequently asked question in companies using Hibernate. | ||||
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| Ans. It's a feature to lazily initialize dependencies , relationship and associations from the Database. Any related references marked as @OneToMany or @ManyToMany are loaded lazily i.e when they are accessed and not when the parent is loaded. | ||||
 Sample Code for Lazy Initialization | ||||
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 Discuss Correct / Improve  hibernate lazy loading hibernate lazy initialization hibernate architecture  Asked in 77 Companies  Basic  frequent | ||||
 Try 2 Question(s) Test | ||||
| Frequently asked question in companies using hibernate. | ||||
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| Ans. 1. First level cache is enabled by default whereas Second level cache needs to be enabled explicitly. 2. First level Cache came with Hibernate 1.0 whereas Second level cache came with Hibernate 3.0. 3. First level Cache is Session specific whereas Second level cache is shared by sessions that is why First level cache is considered local and second level cache is considered global. | ||||
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| Discuss Correct / Improve hibernate orm hibernate cache architecture technical lead first level cache vs second level cache Asked in 18 Companies Intermediate frequent | ||||
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| Ans. HBM Files ( Mapping ) DB Connection ( DB Connection String , User Name , Password , Pool Size ) SQL Dialect ( SQL variant to be generated ) Show SQL ( Show / No show SQL on Console ) Auto Commit ( True / False ) | ||||
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| Discuss Correct / Improve hibernate configuration barclays Asked in 11 Companies | ||||
| Very frequently asked Hibernate interview question. Frequently asked in TCS ( based on 2 feedback ) | ||||
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| Ans. There are 4 types of associations in Hibernate One to One One to Many Many to One Many to Many | ||||
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| Discuss Correct / Improve hibernate associations Asked in 11 Companies frequent | ||||
| Very frequently asked if being interviewed for hibernate. Frequently asked in Tata Consultancy (TCS) and Overstock.com | ||||
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| Ans. If id doesnt exist in the DB load throws an exception whereas get returns null in that case.get makes the call to DB immediately whereas load makes the call to proxy. | ||||
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| Discuss Correct / Improve hibernate Asked in 16 Companies basic frequent | ||||
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| Ans. 1. EHCache ( Easy Hibernate ) 2. OSCache ( Open Symphony ) 3. Swarm Cache ( JBoss ) 4. Tree Cache ( JBoss ) | ||||
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| Discuss Correct / Improve hibernate orm hibernate cache technical lead Asked in 7 Companies | ||||
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| Ans. Criteria is a simplified API for retrieving entities by composing Criterion objects. For example - session.createCriteria(Employee.class).add( Restrictions.like("name", "A%") ).list(); will return all employee objects having name starting with A. | ||||
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| Discuss Correct / Improve hibernate hibernate criteria Asked in 7 Companies Basic Frequent | ||||
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| Ans. Every fresh session having its own cache memory, Caching is a mechanism for storing the loaded objects into cache memory. The advantage of cache mechanism is, whenever again we want to load the same object from the database then instead of hitting the database once again, it loads from the local cache memory only, so that the no. of round trips between an application and a database server got decreased. It means caching mechanism increases the performance of the application. In hibernate we have two levels of caching First Level Cache [ or ] Session Cache Second Level Cache [ or ] Session Factory Cache [ or ] JVM Level Cache | ||||
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| Discuss Correct / Improve Asked in 23 Companies | ||||
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| Ans. table per hierarchy table per concrete class table per sub class | ||||
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| Discuss Correct / Improve hibernate mapping hibernate associations Asked in 4 Companies | ||||
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| This question was recently asked at 'HCL Technologies'.This question is still unanswered. Can you please provide an answer. | ||||
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| Discuss Correct / Improve Spring framework Hibernate Orm Asked in 1 Companies | ||||
What is Lazy Initialization in Hibernate ?
