More than 3000 questions in repository. There are more than 900 unanswered questions. Click here and help us by providing the answer. Have a video suggestion. Click Correct / Improve and please let us know.
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.
Ans. Inner join is the intersection of two tables on the condition defined by the where clause i.e will get records from both tables matched by a column.
Outer join is the union of two tables i.e will get all records from both tables and will put null in the columns where related records are not present.
Left Outer join is the left union of two tables i.e all records from the table on the left and values from the right table for related records else null for the columns from right table.
Right Outer join is the right union of two tables i.e all records from the table on the right and values from the left table for related records else null for the columns from left table.
Help us improve. Please let us know the company, where you were asked this question :
Ans. When a Table Join itself , it's a Self Join. For example - we like to know the pair of department names where first dept has lesser employees than the later.
Select D1.name , D2.name from Dept D1, Dept D2 where D1.employee_count < D2.employee_count
Help us improve. Please let us know the company, where you were asked this question :
Ans. It's a technique to allow multiple clients to make use of a cached set of shared and reusable connection objects providing access to a database or other resource.
Help us improve. Please let us know the company, where you were asked this question :
More than 3000 questions in repository.
Frequently asked at Manhattan Associates ( Based on 2 feedback )
Sample Code for lambda
Discuss 
java java8 lambda expression architecture 
Asked in 58 Companies 
expert 
frequent
Try 1 Question(s) Test
Which Java version introduced Lambda expressions ?
