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Hibernate - Interview Questions and Answers for 'Infosys' - 4 question(s) found - Order By Newest

Frequently asked question in companies using Hibernate.
  Q1. What is Lazy Initialization in Hibernate ?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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Frequently asked question in companies using hibernate.
  Q2. Difference between first level and second level cache in hibernate ?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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 Q3. What are the contents of Hibernate configuration file ( hibernate.cfg.xml ) ?Hibernate
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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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Very frequently asked Hibernate interview question. Frequently asked in TCS ( based on 2 feedback )
  Q4. What are different types of associations in Hibernate ?Hibernate
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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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