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Data Virtualization Flashcards

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  1. In TIBCO Data Virtualization, what does 'data masking' accomplish for sensitive columns?

    Answer: Replaces real sensitive values with obfuscated values for unauthorized users

    Data masking in TDV substitutes real values (e.g., SSNs, credit card numbers) with masked equivalents for users who lack access to the raw data.

  2. What is the TDV 'Business Directory' used for?

    Answer: Providing a searchable catalog of published data assets for business users

    The Business Directory is a self-service catalog that lets business users discover and understand available published data resources.

  3. When TDV performs a federated join between an Oracle source and a Salesforce source, where does the join computation occur by default if neither source can handle the full query?

    Answer: In TDV's in-memory execution engine on the server

    When push-down is not fully possible, TDV retrieves partial result sets from each source and performs the join in its own in-memory engine.

  4. Which TDV configuration setting limits the maximum number of rows returned by a virtual view to prevent runaway queries?

    Answer: Row Limit Governor

    The Row Limit Governor in TDV caps the number of rows a query may return, protecting source systems and server memory from unbounded result sets.

  5. In TDV's SOAP web service publishing, what document defines the operations and data types exposed by a TDV service?

    Answer: WSDL (Web Services Description Language)

    TDV generates a WSDL document that describes the SOAP service interface, including input/output message schemas and operation names.

  6. What TDV feature allows a virtual view to automatically substitute a backup data source if the primary source becomes unavailable?

    Answer: Source failover / redundant data source configuration

    TDV supports redundant data source configuration so that if the primary source fails, queries automatically route to a designated backup source.

  7. Which TDV mechanism allows row-level security so that different users querying the same view receive only their authorized rows?

    Answer: Row-level security filters tied to user identity

    TDV supports row-level security by injecting user-identity-based filters into queries so each user sees only their permitted rows from the same view.

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