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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Recovery scenario
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Smart identification
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Handling object
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all the above
B
Correct answer
Explanation
Smart identification is the specific mechanism in HP/Micro Focus UFT (QTP) used to identify test objects during a run session when the learned properties do not uniquely identify the object. Recovery scenarios are for handling unexpected events, not standard object identification.
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Create data source definitions
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Design and create target database schema
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Design and create the OLAP environment
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Define and create data flows between sources and targets
B,C,D
Correct answer
Explanation
Oracle Warehouse Builder (OWB) is an ETL tool for data warehousing. It allows designing and creating target database schemas, designing and creating OLAP environments, and defining and creating data flows between sources and targets. OWB is a comprehensive data integration and warehousing solution.
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Objects
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Mappings and mapping data
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Tables,Schema,Mapping
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Metadata definitions
D
Correct answer
Explanation
Repositories in data management or metadata repositories (like Informatica or OBI) store metadata definitions. Metadata describes data models, mappings, schemas, and configurations. While objects, mappings, and tables are defined, the repository fundamentally stores their metadata definitions rather than the actual raw data or transient mappings.
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Materialized Views
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Tables and Views
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Facts and Dimesions
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Logical database objects
C
Correct answer
Explanation
In Oracle Warehouse Builder (OWB), OLAP (Online Analytical Processing) constructs are represented by dimensional objects. OWB allows developers to design Facts and Dimensions, which form the star or snowflake schemas crucial for OLAP cubes.
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Creating Mappings
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Import Source and target definitions
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Import store code and design definitions
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Create API definitions
A
Correct answer
Explanation
In Oracle Warehouse Builder, metadata can be created through importing source/target definitions, importing stored code and design definitions, and creating API definitions. Creating mappings is primarily about designing data transformation logic rather than creating metadata structures, making it the exception in this context.
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Delimiting
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File sampling
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Create external tables
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Importing file
B
Correct answer
Explanation
Warehouse Builder captures file structure into its metadata repository through file sampling. By analyzing sample data from the file, OWB can automatically detect and infer the file structure, delimiters, and data types, which is more efficient than manual definition or simple importing.
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Read/Write
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Access not permitted
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Read-only
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read,export
A
Correct answer
Explanation
Technical users require full read/write access to the OWB metadata repository to perform development, deployment, and maintenance tasks. Read-only access would prevent essential operations, while no access would make technical work impossible.
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Runtime Audit Viewer
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Runtime Schema
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Deployment manager
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OEM
B
Correct answer
Explanation
The Runtime Schema in OWB contains audit tables and packages that track execution history, performance metrics, and runtime information. Runtime Audit Viewer is used to display this data, but the actual tables and packages reside in the Runtime Schema.
C
Correct answer
Explanation
OWB includes three main Data Quality components: Match, Merge, and Purge. These components help clean, standardize, and deduplicate data during ETL processes. The number 3 correctly represents the core data quality functionality.
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Resides in different DB Kernel
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Resides in same DB Kernel
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Resides in DB
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Resides in repository
B
Correct answer
Explanation
Oracle 9i integrated relational and OLAP structures within the same database kernel, allowing seamless interoperability. This unified approach eliminated the need for separate OLAP engines and enabled efficient mixed workloads.
B
Correct answer
Explanation
A physical map in mainframe terminology refers to the Load Module - the actual executable code that gets loaded into memory when the map is used. This is distinct from the logical map or copybook which defines the data structure.
A
Correct answer
Explanation
In CICS, a HANDLE CONDITION command establishes an error handling routine that remains active for the duration of the program. The only way to deactivate or modify it before program termination is to issue another HANDLE CONDITION command, which either replaces or augments the existing condition handler.
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cabinets.xml
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connectionpool.properties
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service.properties
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workingdocument
A
Correct answer
Explanation
In Genesys configuration systems, database queries and definitions are typically stored in XML configuration files. The 'cabinets.xml' file is a standard Genesys configuration file that contains database query definitions and connection specifications. The other files listed handle different aspects (connection pooling, service properties, working documents).
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USER_VIEWS
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USER_TAB_COLUMNS
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USER_TABLES
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USER_OBJECTS
D
Correct answer
Explanation
USER_OBJECTS is the correct Oracle system view that shows all objects owned by the current user, including views and their status (VALID or INVALID). USER_VIEWS contains view text/definitions but not status. USER_TAB_COLUMNS describes column information, and USER_TABLES only lists tables.
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INTERPRETTED
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NATIVE
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BOTH
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None of these