Materialized View Replication in Database Systems
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Questions and Answers

What is the primary purpose of creating a materialized view?

  • To support mobile computing applications with offline data access
  • To enable data synchronization across multiple databases
  • To improve query optimization by reducing the number of joins
  • To provide a snapshot of data for reporting and analysis (correct)

How does Oracle Database handle a query on a view?

  • It merges the view and query definitions to construct a new query (correct)
  • It uses data synchronization to ensure data consistency across databases
  • It uses data replication to retrieve data from multiple sources
  • It executes the view definition and then applies the query filter

What is the benefit of using object views in Oracle Database?

  • It supports mobile computing applications with offline data access
  • It enables data replication and synchronization across multiple databases
  • It allows for prototyping and transitioning to object-oriented applications (correct)
  • It improves query optimization by reducing the number of joins

What is the primary difference between a view and a materialized view?

<p>A view is a virtual table, while a materialized view is a physical table (A)</p> Signup and view all the answers

What is the purpose of the OBJECT IDENTIFIER clause in an object view?

<p>To specify the primary key of the object table (C)</p> Signup and view all the answers

How does an object view differ from a regular view?

<p>An object view represents a single object, while a regular view represents a table (A)</p> Signup and view all the answers

What is the benefit of using materialized views in a data warehouse?

<p>It provides fast query response times for complex queries (B)</p> Signup and view all the answers

What is the primary use of object types in Oracle Database?

<p>To define a data type for an object view (D)</p> Signup and view all the answers

What is the purpose of creating a view based on multiple tables?

<p>To provide a single interface for accessing data from multiple tables (B)</p> Signup and view all the answers

What is the benefit of using views in Oracle Database?

<p>It provides a layer of abstraction between the user and the underlying tables (B)</p> Signup and view all the answers

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