Data Mining Interview Questions for Freshers & Experienced

MOLAP Multidimensional Online Analytical processing: In MOLAP data is stored in form of multidimensional cubes and not in relational databases.....
Data warehousing is merely extracting data from different sources, cleaning the data and storing it in the warehouse......
Deleting data from data warehouse is known as data purging. While loading data into staging or in the target table fresh data loading may be needed every time.....
A data cube stores data in a summarized version which helps in a faster analysis of data. The data is stored in such a way that it allows reporting easily......
OLTP: Online Transaction and Processing helps and manages applications based on transactions involving high volume of data........
Data mining can be used in a variety of fields/industries like marketing, advertising of goods, products, services, AI, government intelligence......
A stage of data mining is a logical process for searching large amount information for finding important data......
"Discreet data can be considered as defined or finite data. E.g. Mobile numbers, gender. Continuous data can be considered.....
Models in Data mining help the different algorithms in decision making or pattern matching.......
Data warehousing can be used for analyzing the business needs by storing data in a meaningful form......
A decision tree is a tree in which every node is either a leaf node or a decision node. This tree takes an input an object and outputs some decision.....
Naive Bayes Algorithm is used to generate mining models. These models help to identify relationships between input columns and the predictable columns....
Clustering algorithm is used to group sets of data with similar characteristics also called as clusters.....
Time series algorithm can be used to predict continuous values of data. Once the algorithm is skilled to predict a series of data......
Association algorithm is used for recommendation engine that is based on a market based analysis.....
Sequence clustering algorithm collects similar or related paths, sequences of data containing events......
Data mining is used to examine or explore the data using queries. These queries can be fired on the data warehouse.....
SQL Server data mining offers Data Mining Add-ins for office 2007 that allows discovering the patterns and relationships of the data.....
Data mining extension is based on the syntax of SQL. It is based on relational concepts and mainly used to create and manage the data mining models......
A data mining extension can be used to slice the data the source cube in the order as discovered by data mining......