Here are some list of important interview questions that we've put together. A comprehensive list of questions to help you get through your first interview. We've made sure that the most probable questions asked during interviews are covered in this list. START LEARNINIG OBIEE 11g Here : www.wiziq.com/course/15860

1. OBIEE IMPORTANT INTERVIEW
QUESTIONS
Here are some list of important interview
questions that we’ve put together. A
comprehensive list of questions to help you
get through your first interview. We’ve made
sure that the most probable questions asked
during interviews are covered in this list.

2. What is logging level? Where can
you set logging levels?
Answer: can enable logging level for individual users.We can set the
logging level based on the amount of logging you want to do. In
normal operations, logging is generally disabled (the logging level is
set to 0). If you decide to enable logging, choose a logging level of 1
or 2. These two levels are designed for use by Siebel Analytics
Server administrators.
Set Logging Level:
1. In the Administration Tool, select Manage > Security.
2. The Security Manager dialog box appears.
3. Double-click the user’s user ID.
4. The User dialog box appears.
5. Set the logging level by clicking the up or down arrows next to the
Logging Level field

3. What is level based metrics?
Answer: Level based metrics means, having a measure
pinned at a certain level of the dimension. A LBM is a
metric that is defined for a specific level or intersection of
levels.
Monthly Total Sales or Quarterly Sales are the examples.
Ex: if you have a measure called “Dollars”, you can create
a “Level Based Measure” called “Yearly Dollars” which is
Dollars for a Year. This measure will always return the
value for the year even if you drill down to a lower level
like quarter, month, etc. To create a level based
measure, create a new logical column based on the
original measure (like Dollars in the example above).
Drag and drop the new logical column to the appropriate
level in the Dimension hierarchy in the above example
you will drag and drop it to Year in Time Dim.

4. What is object level security?
Answer: There are two types of object level security:
Repository level: In presentation layer we can set
Repository level security by giving permission or deny
permission to users/groups to see particular table or
column.
Web level: This provides security for objects stored in the
OBIEE web catalog, such as dashboards, dashboards
pages, folder, and reports you can only view the objects
for which you are authorized. For example, a mid-level
manager may not be granted access to a dashboard
containing summary information for an entire
department.

5. Define repository in terms of OBIEE?
Answer: Repository stores the Meta data information. The
extension of the repository file is “.rpd”. With OBIEE
Server, all the rules needed for security, data modeling,
aggregate navigation, caching, and connectivity is stored
in metadata repositories. Each metadata repository can
store multiple business models. OBIEE Server can
access multiple repositories
Repository is divided into three layer,
1. Physical – Represents the data Sources
2. Business – model the Data sources into Facts and
Dimension and apply business logic
3. Presentation – Specifies the user’s view of the data
rendered in OBIEE answers client

6. If you have 3 facts and 4 dimension and you
need to join would you recommend joining fact
with fact? If no than what is the option? Why
you won’t join fact to fact?
Answer : Instead of joining fact with fact we can create one
logical table (fact) and add the 3 fact tables as logical
table source in the BMM layer.

7. Define repository in terms of
OBIEE?
Answer: Repository stores the Meta data information. The
extension of the repository file is “.rpd”. With OBIEE
Server, all the rules needed for security, data modeling,
aggregate navigation, caching, and connectivity is stored
in metadata repositories. Each metadata repository can
store multiple business models. OBIEE Server can
access multiple repositories
Repository is divided into three layer,
1. Physical – Represents the data Sources
2. Business – model the Data sources into Facts and
Dimension and apply business logic
3. Presentation – Specifies the user’s view of the data
rendered in OBIEE answers client

8. What is connection pool and how
many connection pools did you have
in your last project?
Answer: Connection pool is needed for
every physical database. It contains
information about the connection to the
database, not the database itself. Can use
either shared user accounts or can use
pass-through accounts. We can have
multiple connection pools for each group
to avoid waiting.

9. How do we define the relationship
between facts and dimensions in
BMM layer?
Answer: Using complex join we can define
relationship between facts and dimensions in
BMM layer.

10. What are different types of
variables? Explain each.
Answer: There are two classes of variables:
1. Repository variables
2. Session variables
Repository variables-
A repository variable persists from the time the repository is started.
Static: This value does not change until a Siebel Analytics Server
administrator decides to change it.
Dynamic: The values of these variables change with the values
returned by queries. These variables are linked to an initialization
block. An initialization block contains a SQL query. When the
repository is started the value returned by the query in the
initialization block will be assigned to the dynamic variable.

11. Can we create any new logical
column in BMM layer, how?
Answer: Yes. We can create new logical
column in BMM layer.
Example: Right click on fact table> select
new logical column>give name for new
logical column like Total cost.

12. Session Variables-
Session variables are created and assigned a value when
each user logs on(when a new session is started). There
are two types of session variables:
1. System: System variables have reserved names, which
cannot be used for other kinds of variables (such as static
or dynamic repository variables, or for non-system session
variables).
Ex: To filter a column on the value of the variable LOGLEVEL
set the filter to the Variable NQ_SESSION.LOGLEVEL.
2. Non-system: A common use of non-system variables is for
setting user filters. Eg: You could define a non-system
variable called ‘SalesRegion’ that would be initialized to the
name of the user’s sales region. You could then set a
security filter for all members of a group that would allow
them to see only data pertinent to their region. For
example, to filter a column on the value of the variable
‘SalesRegion’ set the filter to the Variable
NQ_SESSION.SalesRegion.

13. How do you implement security
using External Tables and LDAP?
Answer: Instead of storing user IDs and passwords in a OBIEE Server
repository, you can maintain lists of users and their passwords in an
external database table and use this table for authentication
purposes. The external database table contains user IDs and
passwords, and could contain other information, including group
membership and display names used for Siebel Analytics Web
users.
Instead of storing user IDs and passwords in a OBIEE Server
repository, you can have the OBIEE Server pass the user ID and
password entered by the user to an LDAP(Lightweight Directory
Access Protocol ) server for authentication. The server uses clear
text passwords in LDAP authentication. Make sure your LDAP
servers are set up to allow this.

14. If we want to create new logical
column where will we create (in
repository or dashboard). And why?
Answer: It would be better if we create a
new logical column in repository because
if it is in repository you can use it for any
report. If you create new logical column in
dashboard then it is going to affect only
those reports which are on that
dashboard. We cannot use that new
logical column for other dashboards.

15. What is Authentication? How
many types of authentication do
we have in OBIEE?
Answer: Authentication is the process by which a system
verifies a user with the help of a user ID and password. It
checks if user has the necessary permissions and
authorizations to log in and access data. There are 4
main types of Authentication in OBIEE:
• Operating system authentication
• External table authentication
• Database authentication
• LDAP authentication

16. What is the difference between Data
Level Security and Object Level
Security?
Answer: Data level security controls the type
and amount of data that you can see in a
report. Object level security provides
security for objects stored in the OBIEE
web catalog like dashboards, dashboards
pages, folder and reports.

17. ALL THE BEST!
These are just some of the important
questions that can be asked to test your BI
skills. To learn more, join OBIEE 11g
training on WizIQ. Learn from the experts!