Computer Knowledge
Database Management Systems
5,543 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.
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Database Management Systems Questions
B
Correct answer
Explanation
Exadata emphasizes commodity hardware (industry-standard servers and storage components) differentiated by intelligent software innovations like Smart Scan, Hybrid Columnar Compression, and Smart Flash Cache. The positioning message is about software excellence on commodity components, NOT custom hardware.
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Table instead of Column
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Index instead of Table
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Column instead of Row
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Row instead of Column
C
Correct answer
Explanation
Hybrid Columnar Compression stores data in a columnar format rather than traditional row-oriented storage. This enables better compression ratios for similar data types within a column (e.g., many repeated state codes), improving storage efficiency and query performance for analytical workloads.
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Oracle Database Support
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Oracle Enterprise Linux Support
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Oracle Exadata Storage Server Support
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Oracle Real Application Clusters
B,C
Correct answer
Explanation
The Oracle Exadata Storage Server Software Support specifically covers the Exadata storage server software stack (Option C) and Oracle Enterprise Linux OS running on the storage servers (Option B). Oracle Database licenses and RAC options are separate support agreements not included in this storage-server-focused support package.
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Object identification
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Test Table
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Object Repository
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Data Table
C
Correct answer
Explanation
The Object Repository is the central storage location where QTP maintains test objects along with their identification properties and corresponding values. It enables QTP to recognize and interact with application objects during test execution by mapping test script references to actual application objects. Other options like Data Table store test data, not object definitions.
A
Correct answer
Explanation
Pega Process Commander (PRPC) is designed with an open database architecture that supports multiple RDBMS platforms including Microsoft SQL Server, Oracle, and IBM DB2/UDB. This multi-platform support is a key architectural feature.
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Page
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PageList
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PageGroup
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SingleValue
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ValueGroup
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ValueList
D
Correct answer
Explanation
In Pega, properties can be aggregate (containing multiple values) or single-value. Page, PageList, PageGroup, ValueList, and ValueGroup are all aggregate property types - they can hold multiple values or nested structures. SingleValue is NOT an aggregate property - it holds exactly one scalar value like a string, number, or date, making it the correct answer for what is NOT an aggregate property.
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One-to-one
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Many-to-one
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One-to-many
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Many-to-many
D
Correct answer
Explanation
In Pega, a Folder can contain multiple items, and each item can belong to multiple Folders simultaneously. For example, a work object might be in a 'High Priority' folder, a 'New York' folder, and a 'Insurance Claims' folder all at once. Similarly, a folder contains many items, creating a many-to-many relationship. One-to-one, many-to-one, and one-to-many don't capture this bidirectional, multi-member relationship that Folders and items share.
B
Correct answer
Explanation
The Sun Oracle Database Machine specifically requires Oracle Database 11g Release 2 - earlier versions of 11g are not supported on this platform. The machine is engineered to work with the specific capabilities and optimizations introduced in 11gR2. Attempting to deploy earlier versions would not be supported or functional.
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You can manage workloads within a database with Database Resource Manager.
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You can manage workloads across multiple databases with Database Resource Manager.
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You can manage workloads within a database with IO Resource Manager.
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You can manage workloads across multiple databases with IO Resource Manager
A,D
Correct answer
Explanation
Database Resource Manager manages workloads within a single database, making option A true. IO Resource Manager manages workloads across multiple databases at the storage level, making option D true. Option B is false because Database Resource Manager does not work across databases, and option C is false because IO Resource Manager operates at the inter-database level, not within a single database.
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Based on Database Manager Resource Groups
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Based on an Interdatabase Plan
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Based on a Category Plan
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Based on the priority of the background process
A,B,C
Correct answer
Explanation
IORM supports three classification types: Database Resource Manager Groups (intra-database priorities), Interdatabase Plans (allocating resources across databases), and Category Plans (classifying workloads by category). Priority of background processes is not a standard IORM classification method - background processes are typically managed within the other classification schemes.
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An existing Oracle data warehouse customer experiencing performance and scalability issues
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A customer or prospect looking for an "appliance-like" solution
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A customer or prospect needing data mart consolidation
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A customer or prospect with a need for a hardware re-fresh.
A,B,C,D
Correct answer
Explanation
All four scenarios represent quick-win opportunities: existing Oracle warehouse customers with performance issues (A), customers seeking appliance simplicity (B), data mart consolidation needs (C), and those requiring hardware refresh (D). These are all strong sales scenarios where the Sun Oracle Database Machine's value proposition aligns well with customer pain points.
B
Correct answer
Explanation
This statement is false - a key value proposition of the Sun Oracle Database Machine is that you CAN use the same Oracle instance for both data warehousing and OLTP workloads. The machine is designed to consolidate mixed workloads on a single database instance, eliminating the need for separate systems. The statement in the question incorrectly claims this is possible when it actually is the core value proposition.
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Partitioning
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Parallelism
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Storage indexes
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Compression
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Predicate filtering
C,E
Correct answer
Explanation
Storage indexes and predicate filtering (smart scans) are unique to Exadata Storage Servers and significantly reduce I/O. Partitioning, parallelism, and compression are standard Oracle Database features available on non-Exadata platforms, making options a, b, and d incorrect.
B
Correct answer
Explanation
This statement is false - the new capabilities of Oracle Database 11gR2 are indeed key to the Sun Oracle Database Machine's value proposition. Features like Smart Scan, Storage Index, and columnar compression are 11gR2-specific capabilities that deliver the machine's performance advantages. These 11gR2 enhancements are fundamental to Exadata's value.