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on December 12, 2019

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OLAP Operations | Hackerrank Solutions

1. This OLAP operation involves computing all of the data relationships for one or more dimensions. A. Dice B. Slice C. Pivot D. Roll Up Answer. D. OLAP consists of three basic analytical operations: consolidation (roll-up), drill-down, and slicing and dicing. Consolidation involves the aggregation of data that can be accumulated and computed in one or more dimensions. ... By contrast, the drill-down is a technique that allows users to navigate through the details. 2. This OLAP Operation rotates the data and delivers an alternative to the original presentation. A. Pivot B. Slice C. Roll-Up D. Dice Answer. Pivot

Basics of Database Management Systems | DBMS and SQL | Interview Questions

What is a database? A database is a shared collection of logically related data and description of these data, designed to meet the information needs of an organization. What is Database Management System? A Database Management System is a software system that enables users to define, create, maintain, and control access to the database. Database systems typically have high cost and they require high hardware configurations Describe an application program. An application program interacts with a database issuing an appropriate request using a statement

Basic Question on Advanced Database Systems

1. What are server systems? It is an operating system which is designed for servers, and their functionality. They are specially designed for client-server communication Examples of server systems: 1. Windows Server 2008 2. Windows Server 2003 3. Red Hat Enterprise Linus(RHEL) 2. What are distributed systems? A distributed system maintains multiple nodes which are at different locations but linked together using a network. Each of these is installed a smaller version of a server system which helps them in sharing data. Both client and server communicate using the Internet/Networks. 3. What are distributed databases in Database System architectures? Distributed Database System architectures manage multiple, interconnected and interrelated database systems over a network. A DDBMS(Distributed Database Management System) is a software which manages the DDB and provides an access mechanism that makes his distribution transparent to the users. 4. What are h...

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