单选题You define an alert to be raised when the USERS tablespace usage has reached 80% of the total space. Which area would you refer to， in order to confirm that the alert has been raised due the event？（）A the alert.log fileB the DBA_ALERTS viewC the Databa

第1题：

You want to be notified when the space usage of an existing critical tablespace has reached 75% of the allocated space. Which option would you use to achieve this？（）

• A、run a procedure to check the tablespace space usage
• B、define the warning threshold for the tablespace at 75% in Database Control
• C、create a trigger to be executed when tablespace space usage reaches 75%
• D、submit a job by using DBMS_JOB package to check the free space in the tablespace at regular intervals
• E、define the warning threshold to be 75% for the tablespace by ALTER TABLESPACE .. ADD THRESHOLD command

第2题：

You work as a database administrator for Certkiller .com. Users complain that their query is taking a long time to complete. You suspect the database buffer cache size to be the reason， and you define an alert to be generated when the buffer cache hit metric goes below 85%. When you observe the dynamic performance views， you find that the buffer cache hit ratio is 81% but no alerts are being generated.  What could be the reason for this problem？（）

• A、The advisory memory has been turned off.
• B、The DB_CACHE_ADVICE parameter has been set to OFF in the parameter file.
• C、The STATISTICS_LEVEL parameter has been set to BASIC in the parameter file.
• D、The TIMED_STATISTICS parameter has been set to FALSE in the parameter file.
• E、The STATISTICS_LEVEL parameter has been set to TYPICAL in the parameter file.

第3题：

You have created a locally managed tablespace by issuing the following command：        CREATE TABLESPACE data1   DATAFILE ’data1_file1.dbf’ SIZE 10M AUTOEXTEND ON MAXSIZE        UNLIMITED；   For the DATA1 tablespace， you have set the warning level alert limit to 70 percent.  In which situation will a warning level alert be generated？（）  

• A、 when 700 KB is used
• B、 when 700 KB is left as free space
• C、 when 7MB is used
• D、 when 7MB is left as free space
• E、 no alert will be generated because an autoextensible datafile is included in the tablespace

第4题：

You are maintaining your OLTP database in Oracle10g. You have not set the warning level and critical level threshold values for space usage of the DATA1 tablespace. What will be the impact？（）

• A、 No warning level or critical level alert will be generated.
• B、 A warning level alert will never be generated， but a critical level alert will be generated when 97 percent space of the DATA1 tablespace is used.
• C、 A critical level alert will never be generated， but a warning level alert will be generated when 85 percent space of the DATA1 tablespace is used.
• D、 A warning level alert will be generated at 85 percent space usage of the DATA1 tablespace， and a critical level alert is generated at 97 percent space usage of the DATA1 tablespace.

第5题：

The warning level threshold value for a tablespace， DATA1， is set to 60% and the critical level threshold value is set to 80%. The tablespace， DATA1， is infrequently used and is not a part of the production environment. You issued the following command：        SQL> EXECUTE   DBMS_SERVER_ALERT.SET_THRESHOLD        （dbms_server_alert.tablespace_pct_full，        dbms_server_alert.operator_ge，80，        dbms_server_alert.operator_ge，90，        1，1，NULL，   dbms_server_alert.object_type_tablespace，’DATA’）；   What will be the result of the command？（）  

• A、 The command will be executed successfully only if the tablespace DATA1 is a dictionary-managed tablespace.
• B、 The total numbers of alerts that you receive every day will be reduced.
• C、 The total number of alerts that you receive every day will be increased.
• D、 No more data will be added to the DATA1 tablespace if 80% of the space allocated to the DATA1 tablespace is used.

第6题：

第7题：

第8题：

第9题：

第10题：

第11题：

第12题：

第13题：

You have specified the warning and critical threshold values of an application tablespace to be 60% and 70%， respectively. From the tablespace space usage metrics， you find that the actual space usage has reached the specified warning threshold value， but no alerts have been generated. What could be the reason for this？（）

• A、The EVENT parameter was not set.
• B、The SQL_TRACE parameter is set to FALSE
• C、The Enterprise Manager Grid Control is not used.
• D、The STATISTICS_LEVEL parameter is set to BASIC
• E、The TIMED_STATISTICS parameter is set to FALSE

第14题：

You work as a database administrator for Supportcenter.cn. In a production environment， users complain about the slow response time when accessing the database. You have not optimized the memory usage of the Oracle instance and you suspect the problem to be with the memory. To which type of object would you refer to determine the cause of the slow response？（）

• A、The trace file
• B、The fixed views
• C、The data dictionary views
• D、The operating system log fields
• E、The dynamic performance views.

第15题：

You define an alert to be raised when the USERS tablespace usage has reached 80% of the total space. Which area would you refer to， in order to confirm that the alert has been raised due the event？（）

• A、the alert.log file
• B、the DBA_ALERTS view
• C、the Database Control Home page
• D、the Database Control performance page
• E、the Database Control Maintenance page

第16题：

The production database has been functional for the last seven days. Because of application requirements， some of the initialization parameters were changed during run time without any comments. You have been asked to find out the value of the parameters when the instance was started. Which source would you use to locate this information？（）

• A、fixed views
• B、the alert log file
• C、the parameter file
• D、the server parameter file
• E、dynamic performance views

第17题：

第18题：

第19题：

第20题：

第21题：

第22题：

第23题：

第24题：