OLAP Interview Questions and Answers - Freshers & Experienced

Cubes: Data in cubes are persisted in a summarized version that helps to analyze data quickly. The data is persisted, through which reporting can be done easily....
A data cube stores data in a summarized version which helps in a faster analysis of data......
Data source is where the data comes from in data warehousing. The data collected from various sources and is cleaned.....
Data in a warehouse comes from the transactions. Fact table in a data warehouse consists of facts and/or measures.....
Database level roles are used to manage the security of the database. The role can be either fixed or flexible.....
Online Analytical Processing is a powerful and popular data analytical method. Complex data structures are explored and provide the necessary information......
OLAP functionality is performed using SQL Anywhere by utilizing various extensions to SQL statements and window functions.....
Multidimensional Online Analytical Processing and Relational Online Analytical Processing are tools used in analysis of data which is multidimensional....
Bitmap indexes are useful in connecting smaller databases to larger databases. Bit map indexes can be very useful in performing repetitive indexes......
One bitmap is commonly used for every single distinct value. When opted for different types of encoding, the number of bitmaps could be reduced.....
Binning can be used to hold multiple values in one bin. Bitmaps are then used to represent the values in each bin.......
Binning process when creates the binned indexes, answers only some queries. The base data is not checked.......
Hybrid OLAP is a mode of storage that uses a combination of multidimensional data structures and relational database tables for storing multidimensional data.......
OLAP product by default is read only. If multiple access rights are required, admin needs to make necessary changes......
Data Warehouse is used for business measures cannot be used to cater real time business needs of the organization and is optimized for lot of data......
ETL is the process of Extracting, loading and transforming data into meaningful form.......
DSS, Decision Support System, as the name suggests, helps in taking decisions for top executive professionals.....