A Star Schema. _____ is a good alternative to the star schema. Self-service BI tools use a different technology than … Pages 323. C. Fact constellation. Star schema is a mature modeling approach widely adopted by relational data warehouses. D. Star-snowflake schema. C. flexibility. For a limited time, find answers and explanations to over 1.2 million textbook exercises for FREE! Course Hero is not sponsored or endorsed by any college or university. C. Fact constellation. B. qualify. ANSWER: C 29. The most important difference is that the dimension tables in the snowflake schema are normalized. c. 6. Much like a database, a data warehouse also requires to maintain a schema. Star schema is a mature modeling approach widely adopted by relational data warehouses. is a good alternative to the star schema A Star schema B Snowflake schema C. is a good alternative to the star schema. Star schema. Star schema. The correct answer is: Segmentation Question 3 ___________ is a good alternative to the star schema. Select one: Many-to-many Many-to-one One-to-one One-to-, many Feedback Your answer is correct. OLAP-Style Analysis With Self-Service Tools. 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. 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 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. The biggest drawback of the level indicator in the classic star-schema is that it limits_____. DBMS Objective type Questions and Answers. Interestingly, the process of normalizing dimension tables is called snowflaking. It requires modelers to classify their model tables as either dimension or fact. 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. 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. 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. 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. consistency Segmentation Disambiguation Feedback Your answer is correct. A. quantify. The Star Schema Star schemas are organized into fact and dimension tables. This is a really broad question but the short answer is that generally, too many dimensions is bad. 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. 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! A. While it takes more time than star schema for the execution of queries. This preview shows page 129 - 132 out of 323 pages. 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. 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. sales or support calls is surrounded and linked with other tables holding the dimensions of the fact table. consists of a large set of facts and a number of dimensions. However, you would lose the performance benefits of doing that view’s joins in advance, like a true star schema … 5. The Star Schema Star schemas are organized into fact and dimension tables. environment Select one: informational normalized denormalized summary Feedback Your answer is correct. ..... is a subject-oriented, integrated, time-variant, nonvolatile collection or data in support of management decisions. _____ is a good alternative to the star schema. 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. Entities can include products, people, places, and concepts including time itself. 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. A star schema depicts each dimension with only one-dimension table. 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. A. The correct answer is: Segmentation Question 3 _____ is a good alternative to the star schema. D. Star-snowflake schema. 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. Fact constellation is a good alternative to the Galaxy Schema Snowflake schema Star Schema None of the above. Star Schema. *XMLBeans from Apache is another good alternative and has very good XML Schema support. Star schema. Search Google: Answer: (c). 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. C. Fact constellation. 71) Data warehouse architecture is based on. The Star schema is in a more de-normalized form and hence tends to be better for performance. …………………… is a good alternative to the star schema. c) both a & b. d) none of … It requires modelers to classify their model tables as either dimension or fact. 4. Which operation mainly used to access the live data online and analyse it: a. DBMS Objective type Questions and Answers. 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. ANSWER: C 29. D. Star-snowflake schema. The most important difference is that the dimension tables in the snowflake schema are normalized. This preview shows page 129 - 132 out of 323 pages. 1 dimension with 20 attributes is good, 20 dimensions with 1 attribute each is not so good. 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. It is also known as Star Join Schema and is optimized for querying large data sets. It takes less time for the execution of queries. 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. 28. Interestingly, the process of normalizing dimension tables is called snowflaking. 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 … The Star Schema data model is the simplest type of Data Warehouse schema. 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 … Star schema overview. C. Fact constellation. A) Data Mining B) Data Warehousing C) Document Mining D) Text Mining 3. B. qualify. 22. Entities can include products, people, places, and concepts including time itself. When a star schema has many dimension tables, data engineers might refer to it as a centipede schema. A. Feedback Your answer is correct. A directory of Objective Type Questions covering all the Computer Science subjects. Star schema is easy to operate as compared to fact constellation schema as it has less number of joins between the tables. It is structured like a star in shape of appearance. Most business intelligence data warehouses use what is called a dimensional model, where a basic fact table of data e.g. The fact table has the same dimensions as it does in the star schema example. In almost all cases the data retrieval speed of a Star schema has the Snowflake beat. 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. Along the same lines the Star schema uses less foreign keys so the query execution time is limited. A database uses relational model, while a data warehouse uses Star, Snowflake, and Fact Constellation schema. 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 … B. Snowflake 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. This snowflake schema stores exactly the same data as the star schema. Course Hero is not sponsored or endorsed by any college or university. Star schema is a top-down model. Regardless of which Data Binding tool chosen, it is recommended that validation against the XML Schema be undertaken. 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 fact table has the same dimensions as it does in the star schema example. A) Star schema B) Snowflake schema C) Fact constellation D) Star-snowflake schema What is the Star Schema for Data Warehouse Design. A) Star schema B) Snowflake schema C) Fact constellation D) Star-snowflake schema. supports basic OLAP operations, including slice and dice, 73) The core of the multidimensional model is the. This snowflake schema stores exactly the same data as the star schema. B. Snowflake 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. Star schema uses more space. 70) Which of the following is not a kind of data warehouse application? Which operation mainly used to access the live data online and analyse it a. ROLAP b. OLAP c. MOLAP d. Star schema. 28. While it is a bottom-up model. c. 6. Star schemas are the simplest and most popular way of organizing information within a data warehouse. a) write only. 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. 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. Looking at the pharmaceutical sales example, facts are measurable data about the event. One data warehouse schema model is a star schema. B. Snowflake schema. Which of the following applied on warehouse? 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. 69) Which of the following is not a component of a data warehouse? A. While it uses less space. 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: 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. B. Snowflake schema. Star Schema. The biggest drawback of the level indicator in the classic star schema is that is limits ..... A) flexibility B) quantify C) qualify D) ability. Each dimension in a star schema is represented with only one-dimension table. Introducing Textbook Solutions. Looking at the pharmaceutical sales example, facts are measurable data about the event. The Star Schema data model is the simplest type of Data Warehouse schema. B. Snowflake, schema. Alternatives to star schemas at the top level include a variation, which is a snowflake schema. c. ... is a good alternative to the star schema. In this chapter, we will discuss the schemas used in a data warehouse. C. Fact constellation. c. ... is a good alternative to the star schema. Get step-by-step explanations, verified by experts. 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. Feedback Your answer is correct. 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. 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. It is also known as Star Join Schema and is optimized for querying large data sets.

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