Article: The conceptual view provides a level of indirection between internal and external. On one hand it provides a common view of the database, independent of different external view structures, and on the other hand it abstracts away details of how the data are stored or managed (internal level). In principle every level, and even every external view, can be presented by a different data model. In practice usually a given DBMS uses the same data model for both the external and the conceptual levels (e.g., relational model). The internal level, which is hidden inside the DBMS and depends on its implementation, requires a different level of detail and uses its own types of data structure types.

Question: What type of view does the conceptual view offer?
Ans: common


Article: Oklahoma is the nation's third-largest producer of natural gas, fifth-largest producer of crude oil, and has the second-greatest number of active drilling rigs, and ranks fifth in crude oil reserves. While the state ranked eighth for installed wind energy capacity in 2011, it is at the bottom of states in usage of renewable energy, with 94 percent of its electricity being generated by non-renewable sources in 2009, including 25 percent from coal and 46 percent from natural gas. Oklahoma has no nuclear power. Ranking 13th for total energy consumption per capita in 2009, Oklahoma's energy costs were 8th lowest in the nation.

Question: How does Oklahoma's crude oil reserves rank among states?
Ans: fifth


Article: The economy has been growing quickly in recent years. In both 2010 and 2011, the metro area's gross domestic product (GDP) led 27 other metropolitan areas in the country, according to the Conference Board of Canada, recording growth of 6.6 per cent and 5.8 per cent respectively. At $52,000 the city's per capita GDP is the second highest out of all major Canadian cities. Economic forecasts suggest that the city will continue its strong economic growth in the coming years not only in the "oceanic" industries mentioned above, but also in tourism and new home construction as the population continues to grow. In May 2011, the city's unemployment rate fell to 5.6 per cent, the second lowest unemployment rate for a major city in Canada.

Question: When did the unemployment rate fall to 5.6 per cent?
Ans: May 2011


Article: VRS services have become well developed nationally in Sweden since 1997 and also in the United States since the first decade of the 2000s. With the exception of Sweden, VRS has been provided in Europe for only a few years since the mid-2000s, and as of 2010 has not been made available in many European Union countries, with most European countries still lacking the legislation or the financing for large-scale VRS services, and to provide the necessary telecommunication equipment to deaf users. Germany and the Nordic countries are among the other leaders in Europe, while the United States is another world leader in the provisioning of VRS services.

Question: In what European country has VRS services become well developed?
Ans:
Sweden