Computer Knowledge
Database Management Systems
5,344 Questions
Database Management Systems (DBMS) form the core framework for data storage, retrieval, and security in modern software applications. Concepts such as the E-R model, backup planning, SQL integration, and big data architecture are essential for computer knowledge sections. This hub offers a comprehensive set of practice questions to master DBMS fundamentals and advanced database operations.
E-R Model ConceptsBackup and RecoverySQL Server UpgradesJDBC and ODBCBig Data CharacteristicsData VirtualizationOracle Database
Database Management Systems Questions
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Data Dictionary
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Red Book
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SQL Server
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IIS Server
A,C
Correct answer
Explanation
In LANSA (likely typoed as Lash) projects, database changes are managed through the centralized Data Dictionary repository and the underlying database system, such as SQL Server. In contrast, IIS Server is a web hosting server, not a database engine.
A
Correct answer
Explanation
A data warehouse is a centralized repository that stores consolidated data from multiple sources for reporting and analysis. This directly aligns with the definition of a repository of data, meaning the statement is factually true.
B,D
Correct answer
Explanation
DTS and SSIS are Microsoft SQL Server technologies designed specifically for data integration, transformation, and migration workflows. Conversely, SSAS is used for analytical processing (OLAP) databases, and SSRS is dedicated to generating reports from database queries.
D
Correct answer
Explanation
World Book Applications typically maintain 5 search indexes covering different content types (articles, media, dictionary, etc.). This is a specific technical fact about the World Book architecture and search infrastructure. The exact number of indexes is implementation-specific.
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Cursor table
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Table filter
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Dynamic procedure
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View
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Summary table
D
Correct answer
Explanation
Without seeing the scenario, this appears to be about choosing between database structures for a reporting/analysis need. A View is the best choice when you need to query data from multiple tables without duplicating data. Views provide a logical abstraction layer. Table filter and dynamic procedure are not standard SQL structures, while a cursor table would be inefficient.
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Structure
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Design issue
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Data source
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Storage issue
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Operational process
B
Correct answer
Explanation
Without the full context, in data modeling, security review typically occurs during the design issue phase where access controls, privacy requirements, and security constraints are evaluated. Structure phase defines the model, data source phase identifies data origins, storage issue phase deals with physical storage, and operational process phase covers maintenance. Security considerations must be addressed during design.
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Data about data
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Describes a data dictionary
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Self-describing
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Includes user data
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Supports its own structure
D
Correct answer
Explanation
Metadata is 'data about data' - it describes structure, format, relationships, and other characteristics of data. It supports its own structure, is self-describing, and describes what's in a data dictionary. What metadata does NOT include is the actual user data or business data itself - that's the content, not the description. Option D correctly identifies that user data is not metadata.
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Remote DBMS
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Relative DBMS
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Relational DBMS
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Reliable DBMS
C
Correct answer
Explanation
RDBMS stands for Relational Database Management System. It organizes data into tables with relationships between them, based on the relational model proposed by E.F. Codd.
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Repository
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Tablespace
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Temp Tablespace
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Workspace
D
Correct answer
Explanation
Objects created in OWB are first stored in the Workspace, which serves as a staging area for development work. The workspace holds objects before they are deployed to the actual repository. This separation allows for version control and testing before making changes permanent.
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Database user
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Workspace owner
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SYSTEM user
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All of the above
B
Correct answer
Explanation
Registering a target schema in OWB requires workspace owner privileges. This is an administrative task that defines connection and access details for the target database. Regular database users or SYSTEM user don't perform this registration function.
B
Correct answer
Explanation
When importing objects from the database into OWB, only metadata (structure definitions) is imported, not the actual data rows. The repository stores design information about objects - table definitions, column types, constraints - but remains separate from the operational data itself.
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procedures
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packages
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special packages
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functions
B
Correct answer
Explanation
Maps are deployed to Oracle database as PL/SQL packages. Each mapping becomes a package containing procedures for the ETL logic. This package structure supports parameters, error handling, and modular execution of data transformations.
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Free with Oracle
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Builds complex logic easily
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Fastest ETL tool available
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Can be installed in mobile
A,B
Correct answer
Explanation
OWB is included at no additional cost with Oracle Database licenses and provides graphical tools for building complex ETL transformations. However, claims about it being the 'fastest' tool are subjective, and OWB is server-based enterprise software that cannot run on mobile devices.
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sessions stored in state service
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sessions stored in server's inbuilt memory.
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Both A and B
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sessions stored in database
D
Correct answer
Explanation
The answersint portal uses database-based session storage. Sessions are persisted in a database rather than server memory (B) or a state service (A). This approach provides better scalability, persistence across server restarts, and support for distributed deployments. Option C claims 'Both A and B' which is incorrect.
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Chain
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Network
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Tree
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Relational
A
Correct answer
Explanation
Chain is a physical storage structure used in older file systems and some database implementations, not a logical database model. The logical database models are Network (many-to-many relationships), Tree/Hierarchical (parent-child relationships), and Relational (tables with keys). Chain describes how data blocks are linked on disk.