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問題 #108
Select the correct statement.
答案：A
解題說明：
Explanation/Reference:
In a standard OBIEE implementation, we generally want to purge and re-build the cache after every ETL (extract, transform, and load) run.
Incorrect answers:
A: A cache item might be out of date.
B: Cache reduces traffic to the back end database. At worst it does not change the amount traffic.
D: The cache disk should be at faster than the disk of the database.
E: OBIEE Caching and Cache Seeding
Cache is a component that improves performance by transparently storing data such that future requests for the same criteria can be served much faster. Like other application cache is not virtual memory in OBIEE. In OBIEE cache will be stored as files on the Hard Disk of the OBIEE Server in the form of files. By Default caching is enabled in the OBIEE server configuration.
For time-consuming Dashboard Pages, we can use the concept of cache seeding in OBIEE, this can be configured as a scheduled job that will ensure that the data is cached and readily available as and when the user runs the dashboard.
問題 #109
A customer would like to create a change and a % Change for Revenue at the same time. How would they accomplish this?
答案：B
解題說明：
Explanation
After creating your base metrics, try using the Calculation Wizard to automate the process of creating time-series metrics or comparison metrics such as: Change, Percent Change, Index, and Percent. The Wizard may save you many hours of time and frustration, especially if you have to create more than a handful of these metrics. In addition, the Wizard allows you to include customized logic to handle nulls in the base metrics.
You may refer to the Oracle documentation for further detail.
問題 #110
OBIEE default security model stores security Information such as user names and password combinations for accessing an external system such as Active Directory. It is stored in the____________.
答案：D
解題說明：
Identity Store: It is directory server to perform the authentication. It contains user name , password and groups membership information .When a user name and password combination is entered at log in, the authentication provider searches the identity store to verify the credentials provided. See figure below.
http://debaatobiee.files.wordpress.com/2011/02/obiee-11g-security-policy-revised1.png
問題 #111
What are the two types of Session Variables?
答案：B,C
解題說明：
There are two types of session variables:
System - A session variable that the Oracle BI Server and Oracle BI Presentation Services use
for specific purposes.
System session variables have reserved names that cannot be used for other kinds of variables
(such as static or dynamic repository variables and non-system session variables).
Non-system - A system variable that the administrator creates and names. For example, the
administrator might create a SalesRegion non-system variable that initializes the name of a user's
sales region.
The administrator creates non-system session variables using the Oracle BI Administration Tool.
Note: Session Variables
A session variable is a variable that is initialized at login time for each user. When a user begins a
session, the Oracle BI Server creates a new instance of a session variable and initializes it.
There are as many instances of a session variable as there are active sessions on the Oracle BI
Server. Each instance of a session variable could be initialized to a different value.
問題 #112
What is an example of a Session Variable?
答案：C
解題說明：
Note 1: There are four types of variables that you can use:
Session
Repository
Presentation
Request
Note 2: Session Variables
A session variable is a variable that is initialized at login time for each user. When a user begins a session, the Oracle BI Server creates a new instance of a session variable and initializes it.
There are as many instances of a session variable as there are active sessions on the Oracle BI Server. Each instance of a session variable could be initialized to a different value.
There are two types of session variables:
System - A session variable that the Oracle BI Server and Oracle BI Presentation Services use for specific purposes.
System session variables have reserved names that cannot be used for other kinds of variables (such as static or dynamic repository variables and non-system session variables).
Non-system - A system variable that the administrator creates and names. For example, the administrator might create a SalesRegion non-system variable that initializes the name of a user's sales region.
The administrator creates non-system session variables using the Oracle BI Administration Tool.
問題 #113
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