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Tufts EECS 2003 Name:__________________________________________ COMP150 Spring, COMP 150: Data Warehousing/Data Mining Sample Exam Question You have just accepted a job with an environmental research organization and have been tasked with the job of building a data warehouse to keep track of mosquito populations around the United States. Mosquito populations are counted by placing a trap in a specific location, leaving it there for 3 hours, retrieving it, and then counting the number of male and female mosquitoes inside. Traps are set in a location once a week from April until November of each year. Traps have been set around the country and mosquito counts have been conducted since 1955, but the data has never been put into a data warehouse and analyzed. Trap locations are identified by the following characteristics : geographic location (latitude/longitude, city, county, state), environmental area (city, rural), wetness (water within 100 yards, water within 10 yards, dry area), and water type (fresh water, brackish, salt water). Problem 1 Choose which model (star or snowflake) you will use to capture the design of your data warehouse (fact and dimension tables) and draw your star or snowflake schema. 1 Tufts EECS 2003 Name:__________________________________________ COMP150 Spring, Problem 2 Translate the star or snowflake schema into a collection of relational tables and show the resulting physical table design utilizing CREATE TABLE statements. Include all necessary primary and foreign key definitions within the CREATE TABLE statements. Problem 3 Write a DMQL query to compare mosquito counts in city areas with mosquito populations in rural areas . 2 Tufts EECS 2003 Name:__________________________________________ 3 COMP150 Spring,