Interview Questions and Answers for 'IRIS Software' | Search Interview Question

Interview Questions and Answers for 'IRIS Software' - 3 question(s) found - Order By Rating

Frequently asked question in companies using Hibernate.

Q1. What is Lazy Initialization in Hibernate ?

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

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve hibernate lazy loading hibernate lazy initialization hibernate architecture Asked in 77 Companies Basic frequent}

Try 2 Question(s) Test

Related Questions

What are the ways to avoid LazyInitializationException ?

After which Hibernate version , related Entities are initialized lazily ?

What are the points to be considered if we move from Eager initialization to Lazy Initialization in Hibernate ?

How does Lazy Initialization helps improving performance of an application ?

What does the following exception means

org.hibernate.LazyInitializationException: could not initialize proxy - no Session

If you are given choice to avoid LazyInitializationException using any of the following measures, which are the ones you will choose and why ?

1. Set lazy=false in the hibernate config file.
2. Set @Basic(fetch=FetchType.EAGER) at the mapping.
3. Make sure that we are accessing the dependent objects before closing the session.
4. Force initialization using Hibernate.initialize

Q2. Can we have foreign key reference to a non primary key column ?

Database

Ans. Yes, but the respective key in the foreign table should be declared Unique.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve sql database oracle Asked in 2 Companies}

Related Questions

What is ACID ?

What is database deadlock ? How can we avoid them?

What things you would care about to improve the performance of Application if its identified that its DB communication that needs to be improved ?

If you are given a choice to implement the code to either Insert a Record or Update if already exist, Which approach will you follow ?

What is the use of @GeneratedValue annotation in Hibernate?

What are temp tables ?

What is a Database Trigger ?

What is database Normalization ?

What happens to backups if we delete the RDS instance ?

What is a Cursor ?

Q3. What is ConcurrentModificationException ?

Core Java

Ans. This is the exception that is thrown when we try to modify the non concurrent collection class while iterating through it.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java collections concurrentmodificationexception exception concurrency Asked in 14 Companies intermediate}

Related Questions

What is CopyOnWriteArrayList ?

What are the advantages and disadvantages of CopyOnWriteArrayList ?

Search Interview Questions

Help us and Others Improve. Please let us know the questions asked in any of your previous interview.