（）involves comparing actual or planned project practices to those of other projects to generate ideas for improvement and to provide a basis by which to measure performance. These other projects can be within the performing organization or outside of it, and can be within the same or in another application area.

You notice a performance change in your production Oracle 12c database. You want to know which change caused this performance difference.
Which method or feature should you use?（）

You need to create a view EMP_VU. The view should allow the users to manipulate the records of only the employees that are working for departments 10 or 20.
Which SQL statement would you use to create the view EMP_VU?（）

You are planning the creation of a new multitenant container database (CDB) and want to store the ROOT and SEED container data files in separate directories.
You plan to create the database using SQL statements.
Which three techniques can you use to achieve this?（）

Quality planning tools are often used to help plan effective quality management activities . （）is one of such tools, which involves company actual or planned project practices to those or other projects to generate ideas for improvement and to provide a basis by which to measure performance.

Certkiller.com is currently using a performance counter named HitCounter.
You are required to increment each time a user accesses the UI classes within the application.
To do this, you start by creating performance counters using the following code:
GRAFIK - wird nicht für Antwort ben?tigt !!!
You have to adjust the HitCounter performance counter when a hit occurs.
What should you do?（）

You develop a Windows Communication Foundation (WCF) service. You enable all performance counters and run multiple calls to the service.The service must isolate session data to each user. You need to monitor the instancing behaviour used in the service.
Which performance counter should you monitor?（）