【12c OCP認(rèn)證】2019年度OCP最新考試題庫-071.90題
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90、Which statements are true? (Choose all that apply.)
A. The data dictionary is created and maintained by the database administrator.
B. The data dictionary views consists of joins of dictionary base tables and user-defined tables.
C. The usernames of all the users including the database administrators are stored in the data dictionary.
D. The USER_CONS_COLUMNS view should be queried to find the names of the columns to which a constraint applies.
E. Both USER_OBJECTS and CAT views provide the same information about all the objects that are owned by the user.
F. Views with the same name but different prefixes, such as DBA, ALL and USER, use the same base tables from the data dictionary.
Correct Answer: CDF
Section: (none)
Explanation(解析:我們看到的數(shù)據(jù)字典的名字都是基于數(shù)據(jù)字典基表創(chuàng)建的,所有的內(nèi)容都是來源于基表,所有數(shù)據(jù)庫的對象都可以在數(shù)據(jù)字典上查看得到)
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