PERT Study Guide with Practice Questions. PERT is a computer adaptive exam. That means that not all test takers will see the same questions, because the computer will show questions of varying levels of difficulty based on the answers to previous questions.
In 1992, SAP released R/3, which represented a switch from mainframe computing to the client-server model, and from a two-tier to a three-tier architecture, in which presentation, applications and data were housed separately. R/3 was a critical product for SAP that launched the company onto the world stage.
The facade pattern (or facade faÃ§ade) pattern is a software design pattern commonly used with-object oriented. Programming the name is by analogy to an architectural. facadehe name is by analogy to an architectural facade. A facade is an object that provides a simplified interface to a larger body of code, such as a class library. A facade can: 1  make a software library easier to use, understand and test, since the facade has convenient methods for common tasks;