For the V$SESSION_LONGOPS view， you find that some of the database users have long-running queries that consume a lot of CPU time. This causes performance problems for other users in the database， who have much shorter queries. You would like to make sure

第1题：

You are maintaining the SALES database for an organization. You have enabled the Flashback Database feature and want to estimate the flashback space required for future operations.  Which view would you query to estimate the flashback space required？（）

• A、 V$DATABASE
• B、 V$FLASHBACK_DATABASE_STAT
• C、 V$FLASHBACK_DATABASE_LOG
• D、 V$RECOVERY_FILE_DEST

第2题：

In one of your online transaction processing （OLTP） applications， users are manipulating and querying a database table simultaneously. From the Segment Advisor， you find that one of the tables is highly fragmented and you want to shrink the table immediately without affecting the currently active queries.  Which option would you use with the ALTER TABLE command to achieve this objective？（）

• A、REBUILD
• B、CASCADE
• C、TRUNCATE
• D、ROW MOVEMENT
• E、SHRINK SPACE COMPACT
• F、SHRINK SPACE CASCADE

第3题：

From the V$SESSION_LONGOPS view， you find that some of the database users have long/x7frunning queries and are consuming a lot of CPU time. This causes problems for you when you try to log on as the system user and perform small maintenance tasks. You would like to ensure that users SYS and SYSTEM get priority over all other users. Which method would you use to achieve this objective？（）

• A、create a plan directive in the SYS_GROUP
• B、create the pending area for the consumer group
• C、activate the provided SYSTEM_PLAN in Resource Manager
• D、set the TIMED_STATISTICS parameter to TRUE in the parameter file
• E、set the execution time limit for all users， except SYS and SYSTEM， in their profiles

第4题：

You received complaints about the degradation of SQL query performance. You identified top SQL queries that consume time. What would be your next step to find out recommendations about statistics collection and restructuring of the SQL statement to improve query performance？（）

• A、run Segment Advisor
• B、run SQL Tuning Advisor on top SQL statements
• C、run the Automatic Workload Repository （AWR） report
• D、run the Automatic Database Diagnostic Monitor （ADDM）on top SQL statements

第5题：

You executed this command to create a password file: $ orapwd file = orapworcl entries = 10 ignorecase = N Which two statements are true about the password file?（）

• A、It will permit the use of uppercase passwords for database users who have been granted the SYSOPER role.
• B、It contains username and passwords of database users who are members of the OSOPER operating system group.
• C、It contains usernames and passwords of database users who are members of the OSDBA operating system group.
• D、It will permit the use of lowercase passwords for database users who have granted the SYSDBA role.
• E、It will not permit the use of mixed case passwords for the database users who have been granted the SYSDBA role.

第6题：

You are a database administrator for your company. The company’s financial forecasting application uses a SQL Server 2005 database that enables business users to run both ad hoc and predefined queries. You suspect that some queries consume an excessive amount of server resources. You need to identify which queries consume the most resources. You want to achieve this goal as quickly as possible. What should you do？（）

• A、Use the DBCC INPUTBUFFER command.
• B、Use the sys.dm_exec_query_stats dynamic management view （DMV）.
• C、Use the sqldiag utility.
• D、Use the SHOWPLAN session option.

第7题：

You work in a company which is named Wiikigo Corp. The company uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a report which is often executed during business time. There is a stored procedure that is used as the data source for the report. You get a report from users saying that they receive the data returned by the report but the data is inconsistent. As the technical support, you check and find that phantom reads cause this problem. You must make sure that consistent data is returned by the report while not affecting other users. So what action should you perform to achieve this goal?（）  

• A、You should configure the database for Read Committed Snapshot isolation. 
• B、You should modify the stored procedure to use the Snapshot isolation level 
• C、You should configure the database for Auto Update Statistics asynchronously 
• D、You should modify the stored procedure to use the Repeatable Read isolation level

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第13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14题：

From the V$SESSION_LONGOPS view， you find that some of the database users have long-running queries and are consuming a lot of CPU time. This causes problems for you when you try to log on as the system user and perform small maintenance tasks. You would like to ensure that users SYS and SYSTEM get priority over all other users.   Which method would you use to achieve this objective？（）

• A、create a plan directive in the SYS_GROUP
• B、create the pending area for the consumer group
• C、activate the provided SYSTEM_PLAN in Resource Manager
• D、set the TIMED_STATISTICS parameter to TRUE in the parameter file
• E、set the execution time limit for all users， except SYS and SYSTEM， in their profiles

第15题：

Your database is in ARCHIVELOG mode. You lost an index tablespace due to a disk failure while the database was open. You have neither a backup of the lost index tablespace nor the scripts containing the CREATE INDEX statements to recreate the indexes. Currently， several users are executing long-running queries on the database. What will happen to the ongoing activity in the database？（）

• A、 The queries that are currently executing will abort and an error message will be returned to the user.
• B、 The queries that are currently executing will execute normally but future queries will not executed.
• C、 Data Manipulation Language （DML） statements cannot be performed on the tables on which the indexes are based.
• D、 The currently executing and future queries will execute normally， but will be slower

第16题：

From the V$SESSION_LONGOPS view， you find that some of the database users have long-running queries that consume a lot of CPU time. This causes performance problems for other users in the database， who have much shorter queries.  You would like to make sure that the users with large queries do not use all the CPU time， but you still do not want to terminate them with an error message.  Which method would you follow to achieve this？（）

• A、set the CPU time per call in the users profile
• B、set the CPU time per session in the users profiles
• C、set the CPU levels for the users’ group using Resource Manager
• D、set the TIMED_STATISTICS parameter to TRUE in the parameter file

第17题：

Flashback Database is enabled in your Oracle 10g database. One of your database users erroneously purged an important table residing in his schema. The table was purged sometime between 10：00 P.M. and 10：30 P.M. The next day， you decide to flash back the database. Before you flash back the database， you want to ensure that you have all the necessary flashback data. Which dynamic performance view must you use to determine whether you have the required flashback data to recover the purged table？（）

• A、 V$DATABASE
• B、 V$UNDOSTAT
• C、 V$FLASHBACK_DATABASE_LOG
• D、 V$FLASHBACK_DATABASE_STAT

第18题：

You work in a company which uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance which contains a database. Now your company CIO assigns a task to you. You have to check the performance of the SQL Server 2008 instance. You have to find out which common language runtime (CLR) queries takes the longest-running time.  So in the options below, which dynamic management view should you choose to use?（）  

• A、sys.dm_os_wait_stats 
• B、sys.dm_exec_requests 
• C、sys.dm_exec_sessions 
• D、sys.dm_exec_query_stats

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