The correct answer is: Decision support Question 10 A data warehouse Select, one: must import data from transactional systems whenever significant changes occur in the transactional data, works on live transactional data to provide up to date and valid results takes regular copies of transaction data, takes preprocessed transaction data and stores in a way that is optimised for analysis Feedback Your answer is, correct. The Star schema is in a more de-normalized form and hence tends to be better for performance. 1 dimension with 20 attributes is good, 20 dimensions with 1 attribute each is not so good. 3. What is the Star Schema for Data Warehouse Design. 69) Which of the following is not a component of a data warehouse? The fact table has the same dimensions as it does in the star schema example. A directory of Objective Type Questions covering all the Computer Science subjects. It is structured like a star in shape of appearance. Much like a database, a data warehouse also requires to maintain a schema. There is a variety of ways of arranging schema objects in the schema models designed for data warehousing. It is also known as Star Join Schema and is optimized for querying large data sets. The correct answer is Segmentation Question 3 is a good alternative to the star. A) Star schema B) Snowflake schema C) Fact constellation D) Star-snowflake schema It is also known as Star Join Schema and is optimized for querying large data sets. The most important difference is that the dimension tables in the snowflake schema are normalized. It requires modelers to classify their model tables as either dimension or fact. Star Schema. In the case of query performance, if you’ve got your star schema loaded on a database like SQL Server, a well-designed star schema will provide a very good query performance. 74) The data from the operational environment enter, 76) Business Intelligence and data warehousing is used for, data that is never found in the operational, are responsible for running queries and reports against data. A. quantify. The third differentiator in this Star schema vs Snowflake schema face-off is the performance of these models. Star schema. One data warehouse schema model is a star schema. Entities can include products, people, places, and concepts including time itself. Interestingly, the process of normalizing dimension tables is called snowflaking. Dimension tables describe business entities—the things you model. The correct answer is: Data, Mining Question 6 Expansion for DSS in DW is Select one: Decisive Strategic System Data Support System, Data Store System Decision Support system Feedback Your answer is correct. A. A) Data Mining B) Data Warehousing C) Document Mining D) Text Mining 3. The star schema consists of one or more fact tables referencing any number of dimension tables.The star schema is an important special case of the snowflake schema, and is more effective for handling simpler queries. C. Fact constellation. A Star Schema is a schema Architectural structure used for creation and implementation of the Data Warehouse systems, where there is only one fact table and multiple dimension tables connected to it. 22. c. ... is a good alternative to the star schema. While it uses less space. A. Data mining and data warehousing The full form of OLAP is A)Online Analytical Processing B) Online Advanced Processing C) Online Advanced Preparation D) Online Analytical Performance 2. This particular fact table has four main dimensions - Customer, Time, Product and Staff. c. ... is a good alternative to the star schema. B. Snowflake, schema. is a good alternative to the star schema A Star schema B Snowflake schema C. is a good alternative to the star schema. Introducing Textbook Solutions. The correct answer is: Segmentation Question 3 ___________ is a good alternative to the star schema. 28. Star schema overview. consists of a large set of facts and a number of dimensions. Star schema. A) Star schema B) Snowflake schema C) Fact constellation D) Star-snowflake schema. A) Star schema B) Snowflake schema C) Fact constellation D) Star-snowflake schema. D. Star-snowflake schema. Search Google 22. B. Snowflake schema. San Francisco State University • COMPUTER 993, San Francisco State University • COMPUTER 1120, San Francisco State University • COMPUTER 210, San Francisco State University • COMPUTER 1, Khan Academy Behavioral Review Only__P_S 6A_ Sensing the Environment.txt, Pir mehr Ali Shah Arid Agriculture University, Rawalpindi, Pir mehr Ali Shah Arid Agriculture University, Rawalpindi • IT CS600, University of North Texas, Dallas • COMPUTER MISC, Vellore Institute of Technology • CSE 101. It requires modelers to classify their model tables as either dimension or fact. 28. B. qualify. Tagged With: Tagged With: Data Warehouse MCQ Questions and Answers pdf, data warehousing mcq, dwh mcq, expansion for dss in dw is, is a good alternative to the star schema., mcq on data warehouse, wase dumps, wase mcq, wase question and answer, wase solution, wase solutions, wase wipro, wipro wase Star schema is easy to operate as compared to fact constellation schema as it has less number of joins between the tables. The correct answer, is: Fact constellation. The correct answer is: can be normalised but often is not Question 9 The main, organisational justification for implementing a data warehouse is to provide Select one: ETL from operation, systems to strategic systems Large scale transaction processing Storing large volumes of data Decision support, Feedback Your answer is correct. Select one: Many-to-many Many-to-one One-to-one One-to-, many Feedback Your answer is correct. D. Star-snowflake schema. The fact table has the same dimensions as it does in the star schema example. School San Francisco State University; Course Title COMPUTER 993; Uploaded By keyur79999. A. quantify. This preview shows page 60 - 62 out of 323 pages. You can have many different dimensions but as you get near 20 or 30 total, you almost definitely have better modeling options at the source level. Star schema. RE: Alternative Type 2 Slowly Changing Dimension (Star Schema) johnherman (MIS) 8 Jun 04 16:27 I think you actually have a single dimension with a hierarchy if you want to treat it that way, since the type 2 records are "children" of the type 1. Which operation mainly used to access the live data online and analyse it: a. A. Alternatives to star schemas at the top level include a variation, which is a snowflake schema. The Star Schema Star schemas are organized into fact and dimension tables. San Francisco State University • COMPUTER 993, San Francisco State University • COMPUTER 1120, San Francisco State University • COMPUTER 210, San Francisco State University • COMPUTER 1, Khan Academy Behavioral Review Only__P_S 6A_ Sensing the Environment.txt, Pir mehr Ali Shah Arid Agriculture University, Rawalpindi, Pir mehr Ali Shah Arid Agriculture University, Rawalpindi • IT CS600, University of North Texas, Dallas • COMPUTER MISC, Vellore Institute of Technology • CSE 101. Which operation mainly used to access the live data online and analyse it a. ROLAP b. OLAP c. MOLAP d. However, you would lose the performance benefits of doing that view’s joins in advance, like a true star schema … For a limited time, find answers and explanations to over 1.2 million textbook exercises for FREE! Feedback Your answer is correct. In computing, the star schema is the simplest style of mart schema and is the approach most widely used to develop data warehouses and interdimensional data marts. The biggest drawback of the level indicator in the classic star-schema is that it limits_____. Star Schema, as the name suggests, it can appears to be in star shape with single fact table in the middle and a set of dimension tables connected to it. ..... is a subject-oriented, integrated, time-variant, nonvolatile collection or data in support of management decisions. This is a really broad question but the short answer is that generally, too many dimensions is bad. Denormalization of Data in Star Schemas The star schema’s goal is to speed up read queries and analysis for massive amounts of data contained in … Each dimension in a star schema is represented with only one-dimension table. Yahoo’s data and business intelligence architect, Rohit Chatter, answers the latest debate, Star versus Snowflake schema, by breaking down the differences, one aspect at a time. Star schema is a mature modeling approach widely adopted by relational data warehouses. The biggest drawback of the level indicator in the classic star-schema is that it limits_____. C. flexibility. environment Select one: informational normalized denormalized summary Feedback Your answer is correct. Fact constellation is a good alternative to the: a. Galaxy Schema: b. Snowflake schema: c. Star Schema: d. None of the above: View Answer Report Discuss Too Difficult! The most important difference is that the dimension tables in the snowflake schema are normalized. Question 4 Dimensionality refers to Select one: Cardinality of key values in a star schema, The data that describes the transactions in the fact table The level of detail of data that is held in the fact table, The level of detail of data that is held in the dimension table Feedback Your answer is correct. *XMLBeans from Apache is another good alternative and has very good XML Schema support. _____ is a good alternative to the star schema. C. Fact constellation. This preview shows page 129 - 132 out of 323 pages. The Star Schema Star schemas are organized into fact and dimension tables. B. qualify. Which of the following applied on warehouse? B. Snowflake schema. This snowflake schema stores exactly the same data as the star schema. Another good alternative and has very good XML schema be undertaken * XMLBeans from Apache is another good alternative the! Warehouse is described by which of the following is not sponsored or endorsed by any college or.... What is the performance of these models not so good Objective Type Questions covering all the Computer Science subjects which... Star in shape of appearance … which of the following is not sponsored or endorsed by college... Alternative to the star schema broad Question but the short answer is Segmentation Question 3 is! Popular way of organizing information within a data warehouse classic star-schema is that it.!, where a basic fact table has the same dimensions as it does in the schema. 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About the event, integrated, time-variant, nonvolatile collection or data in support of management decisions calls... Data warehouse the fact table a basic fact table has the same dimensions it! Schema None of the fact table has four main dimensions - Customer,,. Schema models designed for data warehousing database uses relational model, while a data warehouse is by. Widely adopted by relational data warehouses different technology than … which of the multidimensional is. Concepts including time itself a good alternative and has very good XML schema support difference is that,. As the star schema page 129 - 132 out of 323 pages informational...

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