In which of the following layers of data abstraction architecture, data sources are integrated into the abstraction?

Which of the following components Of the logical data warehouse provides abstracted and semantic layer overview of enterprise data across virtualized, distributed and repository-based sources?

In data virtualization architecture, app server works at which of the following layers?

Which of the following Options is NOT a disadvantage of data warehouse (DWH)?

Generally six approaches are used for data integration problem: manual integration, common user interface, integration by applications, integration by middleware, uniform data access and common data storage. Which of the following systems use all the six integration approaches simultaneously?

The _________ hypervisor is an example of an open source project.

To which Of the following options, it is difficult to accommodate changes in data warehouse (DWH)?

Which of the following options are correct about traditional Bl architecture?

Which of the following are the benef‌its of data abstraction?

Which of the following options fall under communication-driven DSS?