Oracle Oracle Certifications 1Z0-591 Questions & Answers

• Question 91:

  Which two options are valid Repository Variable names?

  A. USER

  B. CurrentDay

  C. CurrentMonth

  D. Date

  Correct Answer: BC

  Explanation: CurrentDay and CurrentMonth can be calculated by a sql statement.

  Note:

  REPOSITORY VARIABLE(DYNAMIC)

  ?Initialized when BI server is started

  ?Assigned value dynamically based on the result of a query ?Value is dependent of the sql provided in Initialization Block Create a dynamic variable and provide a Name and Default Initializer.Create a new initialization block by clicking on the

  New button in the above screen.

  

  Provide Intialization Block variable Name

• Question 92:

  One benefit of adding a second table source that is joined to the first table source in the Physical Layer by a foreign key relationship is that______.

  A. Multiple SQL queries are performed

  B. Two SQL queries are performed to get data from both tables

  C. A single SQL query is performed to get data from both tables

  D. No SQL queries are performed against the source tables

  Correct Answer: C

  Explanation: A single query can be performed accessing data from both tables through a join on the columns in the foreign key relation.

• Question 93:

  When creating a Security Realm in the WebLogic Console, which object is created?

  A. Groups

  B. Row Level Filters

  C. Server Password

  D. Single Sign On

  Correct Answer: A

  Explanation: Security Realms are an Oracle Platform Security Services concept and bring together sets of users, groups, providers and so on for a WebLogic domain.

• Question 94:

  Select the correct statement.

  A. Cache provides fast and always up-to-date information.

  B. Cache can increase traffic to back end database.

  C. Cache needs to be purged to refresh data.

  D. Cache can degrade query performance by reading data from the disk instead of the database.

  E. Cache is seeded by manually running PL/SQL at the back end database.

  Correct Answer: C

  Explanation: In a standard OBIEE implementation, we generally want to purge and re- build the cache after every ETL (extract, transform, and load) run.

• Question 95:

  An organization has re-implemented one of its systems but has not moved history. One database has data for all years up to 2010 and the other has data for years from 2011 to the present. The organization needs data from the years 2010

  and 2011 on a single report.

  How can you model this in the RPD?

  A. By creating two Logical Fact Tables for each database

  B. By creating joins in the physical model so it looks like a single table

  C. By creating two logical table sources, that specify in Content tab using the Fragmentation content areas to specify the years for each source

  D. By creating two logical table sources and checking the "This Source should be combined with other sources at this level" box leaving the Fragmentation content area blank.

  E. By creating one logical table sources and checking the "This Source should be combined with other sources at this level" box

  Correct Answer: C

  Note: This source should be combined with other sources at this level (check box) Description: Check this box when data sources at the same level of aggregation do not contain overlapping information. In this situation, all sources must be combined to get a complete picture of information at this level of aggregation.

  Note 2: To use a source correctly, the Analytics Server has to know what each source contains in terms of the business model. Therefore, you need to define aggregation content for each logical table source of a fact table. The aggregation content rule defines at what level of granularity the data is stored in this fact table. Use the Content tab of the Logical Table Source dialog box to define any aggregate table content definitions, fragmented table definitions for the source, and Where clauses (if you want to limit the number of rows returned).

  Reference: Siebel Business Analytics Server Administration Guide > Creating and Administering the Business Model and Mapping Layer in a Repository > Creating and Administering Logical Table Sources (Mappings) > Defining Content of Logical Table Sources

• Question 96:

  What are the two leading design solutions recommended by Oracle that you would use for performance?

  A. Design requests that use Complex Queries

  B. Avoid returning big data sets within the Dashboard

  C. Use Cache

  D. Avoid using Guided Navigation unless the data set is large

  Correct Answer: BC

  Explanation: C: 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.

• Question 97:

  What is the process in which there is redundancy of data to improve performance?

  A. Redundancy

  B. Normalization

  C. Denormalization

  D. Granularity

  E. Cardinality

  Correct Answer: C

  Explanation: Denormalization is the process of intentionally backing away from normalization to improve performance by suppressing join and permitting the use of star transformation technique. Denormalization should not be the first choice for improving performance and should only be used for fine tuning of a database for a particular application.

• Question 98:

  When Exporting an Analysis from a Dashboard, which of the following is NOT an option?

  A. MS Excel

  B. MS Word

  C. PDF

  D. CSV

  Correct Answer: B

• Question 99:

  Which of the following characteristics pertain to a "ragged" hierarchy?

  A. It can only be stored in an XML structure.

  B. A branch of the hierarchy may have a different number of levels than other branches.

  C. All values can have a maximum of six levels.

  D. It creates multiple levels of hierarchy in the database table.

  Correct Answer: B

  Explanation: Ragged Hierarchies are hierarchies where some routes down the hierarchy are longer than others; for example, you may have an organizational hierarchy for salespeople where the overall boss has two assistant managers, one of them works on their own and another has three sales managers under them; some of those sales manager may have sales staff under them, and some sales staff may have trainees under them.

• Question 100:

  Identify the reason why Oracle OLAP provides a favorable aggregation strategy.

  A. OLAP cubes eliminate the need for a large number of aggregate tables.

  B. OLAP cubes are stored outside of the database in highly optimized file structures.

  C. OLAP cubes can be easily transported from database to database.

  D. OLAP cubes can be queried by using SQL.

  Correct Answer: D

  Explanation: All metadata for cubes and dimensions is stored in the Oracle database and revealed in the data dictionary views, so that you can query the entire business model in SQL. Reference: Oracle OLAP User's Guide, What's New in Oracle OLAP?