Oracle认证考试1Z0-031单项选择题每日一练(2018.08.01)

单项选择题
Which of the following datatypes are used in situations where you want an ordered set of data elements, where every element is the same datatype, and where you predefine the number of elements that appear in the set?（）
A.REF
B.TABLE
C.CLOB
D.VARRAY
单项选择题
Which of the following choices correctly describes the difference between a data load via the conventional path and the direct path?（）
A.One runs faster than the other
B.A conventional path data load bypasses most of the Oracle RDBMS, whereas a direct path load is a high-speed version of the SQL INSERT
C.A direct path data load bypasses most of the Oracle RDBMS, whereas a conventional path load is a high-speed version of the SQL INSERT
D.The conventional path runs when the CONVENTIONAL command-line parameter is set to TRUE
单项选择题
In order to find out how many database objects a user has created, which view would the DBA query in the Oracle data dictionary? （）
A.DBA_USERS
B.DBA_OBJECTS
C.DBA_TS_QUOTAS
D.DBA_TAB_PRIVS
单项选择题
The user is trying to execute a SELECT statement. Which of the following background processes will obtain data from a disk for the user?（）
A.DISPATCHER
B.USER
C.SERVER
D.LGWR
E. DBW0
单项选择题
A user issues a SELECT command against the Oracle database. Which of the following choices describes a step that Oracle will execute in support of this statement?（）
A.Acquire locks on table queried
B.Generate redo for statement
C.Fetch data from disk into memory
D.Write changes to disk