Java EE 7 Application Developer exam, also known as as 1Z0-900 is of the most in-demand certifications among Java and Java EE developers who aim to become Oracle Certified Professional, Java EE 7 Application Developer. It's in-demand and well recognized among companies and employers all around the world, but at the same time it's one of the toughest exams to crack given the vast amount of topics to cover from Servlet, JSP, REST, to CDI and EJB etc. ...