Business Intelligence Interview Questions With Answers

Business Intelligence Interview Questions with Answers

Q. What is Business Intelligence? A1. Business intelligence (BI) is a broad category of applications and technologies for gathering, storing, analyzing, and providing access to data to help enterprise users make better business decisions.

A2. Business Intelligence is process of exploring data inorder to take strategic decisions whether to drive profitability or to manage costs A3. Business intelligence (BI) is a broad category of application programs and technologies for gathering, storing, analyzing, and providing access to data to help enterprise users make better business decisions. BI applications include the activities of decision support, query and reporting, online analytical processing (OLAP), statistical analysis, forecasting, and data mining. A4. Business Intelligence is a technology based on customer and profit oriented models that reduces operating costs and provide increased profitability by improving productivity, sales, service and helps to make decision making capabilities at no time.

Q. What is a Universe? A1. Universe is a symantec layer between database and the actual user useing the objects for query. It hides the typical database structure from the user. A2. A "universe" is a "Business object" terminology. Business objects objects also happens to be the name of the company. The universe is the interfacing layer between the client and the datawarehouse datawarehouse . The universe defines the relationship among the various tables in the datawarehouse. A3. Universe is ann layer between the backend Database and Front end tool of reports. In This We have an Metadat about the database and connection,Classes, and Objects.In The Universe the dta structure will be modified as Business Terminology and user can easily understand . A4. A universe is a business-oriented mapping of the data structure found in databases: tables, columns, joins, etc. It can represent any specific application, system, or group of users. For example, a universe can relate to a department in a company such as marketing or accounting. In the BusinessObjects User module, universes enable end users to build queries from which they can generate and perform analysis.

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Q. Name some of the standard Business Intelligence tools in the market? A1. Some of the standard Business Intelligence tools in the market According to there performance 1)MICROSTRATEGY 2)BUSINESS OBJECTS,CRYSTAL REPORTS 3)COGNOS REPORT NET 4)MS-OLAP SERVICES A2. 1. Seagate Crystal report 2. SAS 3. Business objects 4. Microstrategy Microstrategy 5. Cognos 6. Microsoft OLAP 7. Hyperion 8. Microsoft integrated services

Q. What is OLAP? A1. OLAP stands for Online Analytical Processing. It is used for Anaytical reporting A2. OLAP: online analytical process This helps to do Business analysis of you data, but normal reporting tools are not supporting to Business analysis. This is the major difference between reporting tool and OLAP tool. A3. OLAP is an Online Analytical Process, Which used especially for analysis purpose but not for reporting. It is a GateWay between the Business user and DWH.

Q. What is OLAP, MOLAP, ROLAP, DOLAP, HOLAP? Examples?

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A1. Cubes in a data warehouse are stored in three different modes. A relational storage model is called Relational Online Analytical Processing mode or ROLAP, while a Multidimensional Online Analytical processing mode is called MOLAP. When dimensions are stored in a combination of the two modes then it is known as Hybrid Online Analytical Processing mode or HOLAP. MOLAP This is the traditional mode in OLAP analysis. In I n MOLAP data is stored in form of multidimensional cubes and not in relational databases. The advantages of this mode is that it provides excellent query performance and the cubes are built for fast data retrieval. All calculations are pre-generated pre-generated when the cube is created and can be easily applied while querying data. The disadvantages of this model are that it can handle only a limited li mited amount of data. Since all calculations have been pre-built when the cube was created, the cube cannot be derived from a large volume of data. This deficiency can be bypassed by including only summary level calculations while constructing the cube. This model also requires huge additional investment as cube technology is proprietary and the knowledge base may not exist in the organization.

ROLAP The underlying data in this model is stored in relational databases. Since the data is stored in relational databases this model gives the appearance of traditional OLAP’s slicing and dicing functionality. The advantages advantages of this model is it can handle a large amount of data and can leverage all the functionalities of the relational database. The disadvantages are that the performance performance is slow and each ROLAP report is an SQL query with all the limitations of the genre. It is also limited by SQL functionalities. ROLAP vendors have tried to mitigate this problem by building into the tool out-of-the-box complex functions as well as providing the users with an ability to define their own functions.

HOLAP HOLAP technology tries to combine the strengths of the above two models. For summary type information HOLAP leverages cube technology and for drilling down into details it uses the ROLAP model. Comparing the use of MOLAP, HOLAP and ROLAP The type of storage medium impacts on cube processing time, cube storage and cube browsing speed. Some of the factors that affect MOLAP storage are: Cube browsing is the fastest when using MOLAP. This is so even in cases where no aggregations have been done. The data is stored in a compressed multidimensional multidimensional format and can be accessed quickly than in the relational database. Browsing is very slow in ROLAP about

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the same in HOLAP. Processing time is slower in ROLAP, especially at higher levels of aggregation. MOLAP storage takes up more space than HOLAP as data is copied and at very low levels of aggregation it takes up more room than ROLAP. ROLAP takes almost no storage space as data is not duplicated. However ROALP aggregations take up more space than MOLAP or HOLAP aggregations. All data is stored in the cube in MOLAP and data can be viewed even when the original data source is not available. In ROLAP data cannot be viewed unless connected to the data source. MOLAP can handle very limited data only as all data is stored in the cube.

A2. OLAP – Online analytical Processes MOLAP – Multidimensional Online analytical Processes (Cubes) ROLAP – Relational Online analytical Processes (RDBMS) HOLAP – Combination of MOLAP & ROLAP DOLAP – Desktop Online analytical Processes (Cubes are stored in desktop also)

Q. How to Import universes and user from business object 6.5 to XI R2, it is showing as some ODBC error is there any setting to change?

A1. You can import universes through import option in file menu.if ur odbc driver is not connecting then u can check ur database driver

Q. What are the various modules in Business Objects product Suite?

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A1. Supervisor Supervisor is the control center for the administration and security of your entire BusinessObjects BusinessObjects deployment. Designer Designer is the tool used to create, manage and distribute universe for BusinessObjects and WebIntelligence Users. A universe is a file that containe connection parameters for one or more database middleware and SQL structure called objects that map to actual SQL structure in the database as columns,tables and database. BusinessObjects Full client Reporting tool Helps to create businessobjects reports based on the universe and also from the other data sources. BusinessObjects Thin client Reporting tool Helps to querry and analysis on the universe and also share the report among other users. It doesn't require any software, just need a webbrowser and the system connected to the businessobjetcs server. Auditor Tool is used for monitor and analysis user and system activity. Application Foundation This module covers a set of products which is used for Enterprise Performance Management (EPM). The tools are Dashboard manager Scorecard Performance Management Applications

Q. What is Hyperion? Is it an OLAP tool? what is the difference between OLAP and ETL tools? too ls? What is the future for OLAP and ETL market for the next five years?

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A1. What is Hyperion? - Its an Business Intelligence tools. Like Brio which was an independent product bought over my Hyperion has converted this product name to Hyperion Intelligence. Is it an OLAP tool? - Yes. You can analyse data schemas using this tools. OLAP: Its an online analytical processing tool. There are various products available for data analysis. ETL: Extract , Transform and Load. This is a product to extract the data from multiple/single source transform transform the data and load it into a a table,flatfile or simply a target. There is a quite a bit compitation in the market with regard to the ETL product as well as the OLAP products. These tools would definately be widely used for data load and data analysis purpose. A2. What is Hyperion? - Its an Business Intelligence tools. Like Brio which was an independent product bought over my Hyperion has converted this product name to Hyperion Intelligence. Is it an OLAP tool? - Yes. You can analyse data schemas using this tools. OLAP: Its an online analytical processing tool. There are various products available for data analysis. ETL: Extract , Transform and Load. This is a product to extract the data from multiple/single source transform transform the data and load it into a a table,flatfile or simply a target. There is a quite a bit compitation in the market with regard to the ETL product as well as the OLAP products. These tools would definately be widely used for data load and data analysis purpose.

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Business Intelligence Interview Questions With Answers

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