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1Z0-042名詞解釋每日一練(2020.03.29)

單項選擇題
The application workload on your database is same between 10 a.m. and 11 a.m. on weekdays. Suddenly you observe poor performance between 10 a.m. and 11 a.m. in the middle of the week. How would you identify the changes in configuration settings， workload profile， and statistics to diagnose the possible causes of the performance degradation？（）
A.by using the SQL access advisor
B.by using the Automatic Workload Repository report
C.by running the Automatic Database Diagnostic Monitor （ADDM）
D.by using the Automatic Workload Repository Compare Period report
E.by analyzing the output of the V$ACTIVE_SESSION_HISTORY view
多項選擇題
Identify the two tablespaces whose data files are so critical that only a closed recovery is possible.（）
A.SYSAUX
B.TOOLS
C.UNDO
D.INDEX
E.SYSTEM
F.USERS
G.TEMP
單項選擇題
You work as a database administrator for Certkiller .com. Redo log files are not multiplexed in your database. Redo log blocks are corrupted in group 2， and archiving has stopped. All the redo logs are filled and database activity is halted. Database writer has written everything to disk. Which command would you execute to proceed further？（）
A.RECOVER LOFIEL BLOCK GROUP 2；
B.ALTER DATABASE DROP LOGFILE GROUP 2；
C.ALTER DATABASE CLEAR LOGFILE GROUP 2；
D.ALTER DATABASE RECOVER LOGFILE GROUP 2；
E.ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 2；
單項選擇題
One of the redo log members in your database is lost. You queried V$logfile for further details. What would be the member’s status？（）
A.LOST
B.INVALID
C.EXPIRED
D.DELETED
E.CORRUPT
F.UNKNOWN
G.OBSOLETE
單項選擇題
You execute the following set of commands to create a database user and to grant the system privileges in your production environment. SQL> CREATE USER user01 IDENTIFIED BY oracle DEFAULT TABLESPACE tbs1 TEMPORARY TABLESPACE temp PROFILE default / SQL> GRANT create session， create table TO user01；While executing the command to create a table， the user gets the following error message and the CREATE TABLE.. command fails. ERROR at line 1：ORA-01950： no privileges on tablespace What could be the possible reason for this error message？（）
A.The tablespace TBS1 is full.
B.The user is not the owner of the SYSTEM tablespace.
C.The user does not have quota on the TBS1 tablespace.
D.The user does not have sufficient system privileges to create table in the TBS1 tablespace.
E.The user does not have sufficient privileges to create table on the default permanent tablespace.

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