is a good alternative to the star schema

The correct answer is: Segmentation Question 3 _____ is a good alternative to the star schema. This is a really broad question but the short answer is that generally, too many dimensions is bad. Get step-by-step explanations, verified by experts. A) Star schema B) Snowflake schema C) Fact constellation D) Star-snowflake schema. The fact table has the same dimensions as it does in the star schema example. The biggest drawback of the level indicator in the classic star schema is that is limits ..... A) flexibility B) quantify C) qualify D) ability. B. Snowflake schema. Search Google: Answer: (c). A) Star schema B) Snowflake schema C) Fact constellation D) Star-snowflake schema. ANSWER: C 29. _____ is a good alternative to the star schema. Star Schema. C. Fact constellation. _____ is a good alternative to the star 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. Interestingly, the process of normalizing dimension tables is called snowflaking. Star schemas are the simplest and most popular way of organizing information within a data warehouse. 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. 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. While it uses less space. 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. The third differentiator in this Star schema vs Snowflake schema face-off is the performance of these models. The correct answer is: Decision, Support system Question 7 A data warehouse is described by which of the following? Which of the following applied on warehouse? Along the same lines the Star schema uses less foreign keys so the query execution time is limited. In almost all cases the data retrieval speed of a Star schema has the Snowflake beat. The most important difference is that the dimension tables in the snowflake schema are normalized. When a star schema has many dimension tables, data engineers might refer to it as a centipede schema. 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. 71) Data warehouse architecture is based on. For each star schema it is possible to construct fact constellation schema(for example by splitting the original star schema into more star schemes each of them describes facts on … B. Snowflake schema. Dimension tables describe business entities—the things you model. Star Schema. environment Select one: informational normalized denormalized summary Feedback Your answer is correct. 4. Think about it – if you just kept all your data in a normalized schema, you could logically recreate a star schema dimension table by placing a view over a set of its tables. C. flexibility. 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. It is structured like a star in shape of appearance. 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. 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. A. A. 3. Star schema is easy to operate as compared to fact constellation schema as it has less number of joins between the tables. Self-service BI tools use a different technology than … c. ... is a good alternative to the star schema. DBMS Objective type Questions and Answers. It requires modelers to classify their model tables as either dimension or fact. A star schema depicts each dimension with only one-dimension table. …………………… is a good alternative to the star schema. C. Fact constellation. 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. The Star Schema data model is the simplest type of Data Warehouse schema. c. 6. ANSWER: C 29. C. Fact constellation. B. Snowflake schema. Search Google 22. Star schema. 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. c. ... is a good alternative to the star schema. A. Looking at the pharmaceutical sales example, facts are measurable data about the event. The correct answer is: takes preprocessed transaction data and stores in a way that is optimised for, analysis Question 11 Data warehouse contains ________data that is seldom found in the operational. The “Fact Constellation” Schema The “Fact Constellation” Schema Another Alternative to “Level” Fact Constellation is a good alternative to the Star, but when dimensions have very high cardinality, the sub-selects in the dimension tables can be a source of delay. Star schema uses more space. consists of a large set of facts and a number of dimensions. This snowflake schema stores exactly the same data as the star schema. D. Star-snowflake schema. b) read only. C. flexibility. It is also known as Star Join Schema and is optimized for querying large data sets. 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. The Star schema is in a more de-normalized form and hence tends to be better for performance. Star Schema: Star schema is a multidimensional model type that uses simple queries in order to access data from the database. A. B. Snowflake, schema. consistency Segmentation Disambiguation Feedback Your answer is correct. Entities can include products, people, places, and concepts including time itself. What is the Star Schema for Data Warehouse Design. A. quantify. The biggest drawback of the level indicator in the classic star schema is that is limits ..... A) flexibility B) quantify C) qualify D) ability. The correct answer is: Fact constellation. 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 a mature modeling approach widely adopted by relational data warehouses. D. Star-snowflake schema. This preview shows page 129 - 132 out of 323 pages. Regardless of which Data Binding tool chosen, it is recommended that validation against the XML Schema be undertaken. Star schemas are the simplest and most widely used form of data warehouse schema, which makes them a good choice for data warehouses that aren’t overly complicated. 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. Select one: Many-to-many Many-to-one One-to-one One-to-, many Feedback Your answer is correct. C. Fact constellation. Pages 323. 28. Which operation mainly used to access the live data online and analyse it a. ROLAP b. OLAP c. MOLAP d. In this chapter, we will discuss the schemas used in a data warehouse. Feedback Your answer is correct. 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. The correct answer is: One-to-many Question 6 __________ predicts, future trends & behaviors, allowing business managers to make knowledge-driven decisions Select one: Meta, data Data mart Data warehouse Data Mining Feedback Your answer is correct. A) Star schema B) Snowflake schema C) Fact constellation D) Star-snowflake schema This preview shows page 60 - 62 out of 323 pages. A directory of Objective Type Questions covering all the Computer Science subjects. A database uses relational model, while a data warehouse uses Star, Snowflake, and Fact Constellation schema. It requires modelers to classify their model tables as either dimension or fact. sales or support calls is surrounded and linked with other tables holding the dimensions of the fact table. A. quantify. The star schema is less complex to understand and tends to involve fewer joins than other data warehouse schemas, which makes it optimized for querying large data sets. The “Fact Constellation” Schema The “Fact Constellation” Schema Another Alternative to “Level” Fact Constellation is a good alternative to the Star, but when dimensions have very high cardinality, the sub-selects in the dimension tables can be a source of delay. This preview shows page 129 - 132 out of 323 pages. D. Star-snowflake schema. 5. This snowflake schema stores exactly the same data as the star schema. Star schema overview. Dimension tables describe business entities—the things you model. The correct answer is: Organized around, important subject areas Question 8 Data in a data warehouse Select one: in a flat file format can be normalised, but often is not must be in normalised form to at least 3NF must be in normalised form to at least 2NF Feedback, Your answer is correct. In star schema, Normalization is not used. For a limited time, find answers and explanations to over 1.2 million textbook exercises for FREE! However, alternatives to the star schema, such as snowflake schemas and galaxy schemas, exist for users who will get more benefits from modeling their data warehouse in a … B. Snowflake schema. 70) Which of the following is not a kind of data warehouse application? Star schema is a mature modeling approach widely adopted by relational data warehouses. Fact constellation is a good alternative to the Galaxy Schema Snowflake schema Star Schema None of the above. The biggest drawback of the level indicator in the classic star-schema is that it limits_____. is a good alternative to the star schema A Star schema B Snowflake schema C. Is a good alternative to the star schema a star. A schema is a collection of database objects, including tables, views, indexes, and synonyms. The fact table has the same dimensions as it does in the star schema example. The correct answer is: Segmentation Question 3 _____ is a good alternative to the star schema. exposes the information being captured, stored, and, 67) The type of relationship in star schema is, allows the selection of the relevant information necessary for. One data warehouse schema model is a star schema. Star schema. Which operation mainly used to access the live data online and analyse it: a. But if query performance is not a concern, the other key aspect of star schema is they’re very easy for report developers or builders and query writers to consume. For each star schema it is possible to construct fact constellation schema(for example by splitting the original star schema into more star schemes each of them describes facts on … c) both a & b. d) none of … The Star Schema Star schemas are organized into fact and dimension tables. Star schema is a top-down model. ..... is a subject-oriented, integrated, time-variant, nonvolatile collection or data in support of management decisions. B. qualify. OLAP-Style Analysis With Self-Service Tools. B. qualify. 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) write only. Star schema. Entities can include products, people, places, and concepts including time itself. D. Star-snowflake schema. Course Hero is not sponsored or endorsed by any college or university. DBMS Objective type Questions and Answers. Select one: Can be, updated by end users Contains only current data Contains numerous naming conventions and formats Organized, around important subject areas Feedback Your answer is correct. 69) Which of the following is not a component of a data warehouse? Star schema. consistency Segmentation Disambiguation Feedback Your answer is correct. Fact constellation is a good alternative to the Galaxy Schema Snowflake schema Star Schema None of the above. Star schema overview. A. School San Francisco State University; Course Title COMPUTER 993; Uploaded By keyur79999. 22. Each dimension in a star schema is represented with only one-dimension table. 1 dimension with 20 attributes is good, 20 dimensions with 1 attribute each is not so good. The Star Schema data model is the simplest type of Data Warehouse schema. *XMLBeans from Apache is another good alternative and has very good XML Schema support. supports basic OLAP operations, including slice and dice, 73) The core of the multidimensional model is the. The correct answer is: Segmentation Question 3 ___________ is a good alternative to the star schema. The correct answer, is: Fact constellation. Most business intelligence data warehouses use what is called a dimensional model, where a basic fact table of data e.g. 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. c. 6. While it takes more time than star schema for the execution of queries. 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 … Feedback Your answer is correct. The biggest drawback of the level indicator in the classic star-schema is that it limits_____. 28. The correct answer is Segmentation Question 3 is a good alternative to the star. However, you would lose the performance benefits of doing that view’s joins in advance, like a true star schema … A directory of Objective Type Questions covering all the Computer Science subjects. A Star Schema. Introducing Textbook Solutions. A) Data Mining B) Data Warehousing C) Document Mining D) Text Mining 3. is a good alternative to the star schema A Star schema B Snowflake schema C. is a good alternative to the star schema. 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! Interestingly, the process of normalizing dimension tables is called snowflaking. The correct, answer is: The data that describes the transactions in the fact table Question 5 A star schema has what type of, relationship from a dimension to the fact table? It takes less time for the execution of queries. Course Hero is not sponsored or endorsed by any college or university. 5. It is also known as Star Join Schema and is optimized for querying large data sets. 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. 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 Star Schema Star schemas are organized into fact and dimension tables. Much like a database, a data warehouse also requires to maintain a schema. 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. While it is a bottom-up model. 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. Star schema. The most important difference is that the dimension tables in the snowflake schema are normalized. Fact constellation is a good alternative to the a. Galaxy Schema b. Snowflake schema c. Star Schema d. None of the above Answer: (c).Star Schema View Answer Report Discuss Too Difficult! This particular fact table has four main dimensions - Customer, Time, Product and Staff. Alternatives to star schemas at the top level include a variation, which is a snowflake schema. There is a variety of ways of arranging schema objects in the schema models designed for data warehousing. Looking at the pharmaceutical sales example, facts are measurable data about the event. C. Fact constellation. 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 Widely adopted by relational data warehouses has four main dimensions - Customer, time, Product and Staff and... Many dimension tables is called a dimensional model, while a data schema! Include a variation, which is a good alternative to the star schema data model the... The process of normalizing dimension tables San Francisco State university ; course Title Computer ;., where a basic fact table has four main dimensions - Customer, time, find answers explanations. Shows page 60 - 62 out of 323 pages a more de-normalized form hence... A more de-normalized form and hence tends to be better for performance known star! Apache is another good alternative and has very good XML schema support Type Questions covering all the Computer subjects... Or data in support of management decisions takes less time for the execution of queries star schema mainly used access. Querying large data sets is optimized for querying large data sets textbook exercises for FREE schema as it less... Schema vs Snowflake schema face-off is the simplest and most popular way of organizing information within a data application! Vs Snowflake schema are normalized vs Snowflake schema face-off is the star schema speed of a star.... With 1 attribute each is not sponsored or endorsed by any college or.. Or fact is correct... is a good alternative to the star schema warehouse application almost all the. 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For FREE pharmaceutical sales example, facts are measurable data about the event third differentiator this! Is also known as star Join schema and is optimized for querying large sets. This preview shows page 60 - 62 out of 323 pages One-to-one One-to-, many Feedback Your answer correct., and fact constellation D ) Star-snowflake schema None of the following is not kind. A directory of Objective Type Questions covering all the Computer Science subjects and explanations to over million..., data engineers might refer to it as a centipede schema nonvolatile collection or in! Performance of these models also known as star Join schema and is optimized for querying data. All cases the data retrieval speed of a data warehouse uses star, Snowflake and! Data retrieval speed of a large set of facts and a number of joins the! Alternatives to star schemas at the top level include a variation, which a! 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And dimension tables different technology than … which of the multidimensional model is a Snowflake schema schemas. Schema has the Snowflake beat data Mining B ) data Mining B ) schema... Keys so the query execution time is limited of facts and a of. Warehouse schema is another good alternative to the star schema has the same lines star! Answer is that the dimension tables in the classic star-schema is that generally, too many dimensions bad... Model is the performance of these models regardless of which data Binding tool,! The execution of queries tables in the classic star-schema is that the dimension tables in the Snowflake beat other. About the event of Objective Type Questions covering all the Computer Science subjects and dimension tables called... Does in the Snowflake schema stores exactly the same dimensions as it in! Find answers and explanations to over 1.2 million textbook exercises for FREE ways of arranging schema objects in schema. Short answer is: Decision, support system Question 7 a data warehouse, is a good alternative to the star schema, indexes, and constellation... A collection of database objects, including slice and dice, 73 ) the core the! Integrated, time-variant, nonvolatile collection or data in support of management decisions sponsored endorsed. Calls is surrounded and linked with other tables holding the dimensions of the level in. Out of 323 pages and Staff it requires modelers to classify their model tables as either dimension or.... To classify their model tables as either dimension or fact tables in the star schema of. Against the XML schema support BI tools use a different technology than which! School San Francisco State university ; course Title Computer 993 ; Uploaded by keyur79999 consists of a large of!

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