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get vs load in Hibernate
Difference between get and load method in Hibernate is one of the most popular questions asked in Hibernate and
spring interviews. Hibernate
Session class provides two methods to access object e.g.
session.get() and
session.load() both looked quite similar to each other but there are subtle differences between load and get method which can affect the performance of the application. The main
difference between get() vs load method is that
get() involves database hit if an object doesn't exist in
Session Cache and returns a fully initialized object which may involve several
database calls while load method can return proxy in place and only initialize the object or hit the database if any method other than
getId() is called on persistent or entity object.
Strategy design pattern is based upon open closed design principle, the 'O' of famous SOLID design principles. It's one of the popular pattern in the field of object-oriented analysis and design along with
Decorator,
Observer and
Factory patterns. Strategy pattern allows you to encapsulate possible changes in a process and encapsulate that in a Strategy class. By doing that your process (mainly a method) depends upon a strategy, higher level of abstraction than implementation. This makes your process open for extension by providing new Strategy implementation, but closed for modification, because the introduction of a new strategy doesn't require a change in a tested method. That's how it confirms
open closed design principle.
The Oracle Certifications is one of the most repeated, industry-recognized certifications. It also provides Java certifications like Oracle Certified Associate Java Programmer, also known as OCAJP and Oracle Certified Professional Java Programmer, also known as OCPJP. These two are most popular Java certification and there are many benefits of passing them e.g. better chance to get a Java development job, improved performance on Java interviews, better salary rise, and promotions, and better opportunity for moving abroad.
