Please answer all the MCQs.

21. Which below is an example of a shopping portal? * A) eCost.com B) shopping.com C) eBay.com D) All of these are shopping portals. 22. In m-commerce being available at any location at anytime is known as * A) Ubiquity B) Convenience C) Interactivity D) Localization 23. Which company below used crowdsourcing to translate its site into several other languages? A) Dell B) Amazon C) LEGO D) Facebook 24. Which below is not a benefit of crowdsourcing? * A) Problems can be explored cheaply and quickly B) A wider range of talents can be tapped C) The community may feel a brand building kinship D) There may be no crowd in crowd sourcing 25. An application where only one user accesses the database at a given time is an example of a(an): * A) Single use database application. B) Multiuser database application C) E-commerce database application D) Data mining data application 26. Because it contains a description of its own structure, a database is considered to be A) Described B) Metadata compatible C) Self- describing D) An application program 27. Which of following is not considered to be basic element of an enterprise-class database system? * A) Users B) Database applications C) DBMS D) COBOL programs 28. An Enterprise Resource Planning application is an example of a (n) A) single-user database application B) multiuser database C) e-commerce database application D) Data mining database application 29. The DBMS that is not most difficult to use is A) Microsoft's SQL Server B) Microsoft's Access C) IBM 's DB2 D) Oracle Corporation's Oracle 30. Which of the following schemas does define a view or views of the database for particular users? * A) Internal schema B) Conceptual schema C) Physical schema D) External schema