WorksheetsData Mining Quiz
Total questions: 10
Worksheet time: 5mins
Which of the following best describes Data Mining?
Storing large volumes of data
Extracting useful patterns and knowledge from data
Querying a database using SQL
Visualizing data using charts
Which sequence correctly represents the Knowledge Discovery in Databases (KDD) process?
Data Mining → Data Warehouse → Database → Decision
Database → Data Mining → Data Warehouse → Decision
Database → Data Preprocessing → Data Mining → Evaluation
Data Mining → Database → Preprocessing → Knowledge
Which statement correctly differentiates a Database and a Data Warehouse?
Both store only historical data
Database supports analysis; Data warehouse supports transactions
Database stores current data; Data warehouse stores integrated historical data
Database is read-only; Data warehouse allows updates
Where does a Data Cube fit in the data mining architecture?
Inside the operational database
Directly on raw transactional data
Built from the data warehouse for OLAP analysis
Used only for classification
Which OLAP operation moves from summarized data to more detailed data?
Roll-up
Slice
Dice
Drill-down
Which of the following is an example of Invisible Data Mining?
Running Apriori algorithm in SAS
Writing SQL queries for reports
Google automatically ranking search results
Designing a star schema
In which data mining functionality are predefined class labels required?
Clustering
Association
Classification
Outlier detection
Identifying unusual credit card transactions is an example of:
Classification
Association analysis
Clustering
Outlier analysis
Grouping genes with similar expression patterns in microarray data uses which functionality?
Classification
Clustering
Trend analysis
Discrimination
Which of the following is considered a major challenge in data mining?
Small data size
Single data source
Poor data quality and noise
Simple interpretation of results
