ou are in the middle of a transaction updating a very important table. The machine on which adatabase was running reboots because of power outage. This caused a database instance failure.
Which statement is true in this situation（）
A.The online redo log files and archived redo log files are required to accomplish the recovery.
B.The uncommitted transaction will be committed at the next startup of the database instance.
C.The uncommitted transaction is rolled back automatically at the next opening of the database.
D.The DBA has to perform the recovery on the database to recover the uncommitted transaction.
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Given below is a list of scenarios：
1）A user terminates his session abnormally.
2）The connection between the server and the client application terminates because of a network failure.
3）A schema is accidentally dropped.
4）The tablespace is accidentally dropped from the database.
5）The hard disk gets corrupted and the data files in the disk are lost.
6）The database instance abnormally shuts down because of power failure.
Which scenarios require DBA intervention to perform recovery（）
A.4 and 5
B.1，3，and 6
C.4，5，and 6
D.3，4，and 5
E.1，2，and 6
A.The alert log file is corrupted.
B.A tablespace is accidentally dropped.
C.One of the redo log members is corrupted.
D.A database user terminates the session abnormally.
E.The hard disk on which the data file is stored is corrupted.
View the Exhibit and examine the parameters.
User A executes the following command to update the TRANS table： SQL> UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code=’C005’；
Before user A issues a COMMIT or ROLLBACK command， user B executes the following command onthe TRANS table：
SQL> ALTER TABLE trans MODIFY （tr_type VARCHAR2（3））；
What would happen in this scenario（）
A.The ALTER TABLE command modifies the column successfully.
B.The DDL operation gets higher priority and transaction for user a is rolled back.
C.The ALTER TABLE command waits indefinitely until user a ends the transaction.
D.The ALTER TABLE command fails after waiting for 60 seconds due to the resource being busy.
Automatic Shared Memory Management is disabled for your database instance. You realize that thereare cases of SQL statements performing poorly because of repeated parsing activity， resulting indegradation of performance.
What would be your next step to improve performance？ （）
A.Run the SQL Access Advisor.
B.Run the Memory Advisor for the sga.
C.Run the Memory Advisor for the pga.
D.Run the Memory Advisor for the shared pool.
E.Run the Memory Advisor for the buffer cache.
View Exhibit1 and Exhibit2 to examine the current memory allocation and parameter settings，respectively.
Why are advisors not available for the shared pool and the buffer cache()
A.because the DB_CACHE_ADVICE parameter is set to OFF
B.because Automatic Memory Management （AMM） is disabled for the database instance
C.because Automatic Shared Memory Management （ASMM） is enabled for the database instance
D.because the values for the DB_CACHE_SIZE and SHARED_POOL_SIZE parameters were not setinitially
View the Exhibit to examine the output produced by the following query at three different times sincethe database instance started and has experienced workloads of different capacities：
SQL> SELECT substr（component， 0， 10） COMP， current_size CS，user_specified_size USFROM v$memory_dynamic_componentsWHERE current_size!=0；
What do you infer from this（）
A.The database instance is running with manual PGA management.
B.The database instance is running with manual shared memory management.
C.The database instance has the MEMORY_TARGET value set to a nonzero value.
D.All sessions are connected to the database instance in dedicated mode， and no RMAN or parallelquery operations have been performed.
Automatic Shared Memory Management （ASMM） has been enabled for your database instance.
Theinitialization parameters for the components that are managed by ASMM are not set. After observing theeffects of ASSM， you executed the following command： SQL> ALTER SYSTEM SET DB_CACHE_SIZE = 100M；
Which statement is true in this scenario（）
A.The minimum memory size for the database buffer cache is set to 100 mb.
B.The maximum memory size that can be obtained by the database buffer cache during ASMM is set to100 mb
C.The minimum memory size allocated for a server process in the database buffer cache in dedicatedmode is set to 100 mb.
D.The maximum memory size from the database buffer cache that can be released for dynamicdistribution during ASMM is set to 100 mb
View the Exhibits and examine lock waits.
Users HR and SH complain that their transactions on one of the application tables， EMP， are waiting for response.
Which action would you take to release the lock and enable users HR and SH to continue with theirtransactions（）
A.Kill the session of the user SCOTT with session ID118.
B.Issue manual checkpoint using the ALTER SYSTEM command.
C.Modify the profile used by user SCOTT to reduce the CONNECT_TIME limit.
D.Flush the Shared Pool to remove the SQL statement causing "wait" in memory.
A.Clearing an alert sends the alert to the alert history.
B.Response actions cannot be specified with server-generated alerts.
C.The nonthreshold alerts appear in the DBA_OUTSTANDING_ALERTS view.
D.Server-generated alerts notify the problems that cannot be resolved automatically and requireadministrators to be notified.
View the Exhibit to examine the output of the DBA_OUTSTANDING_ALERTS view.
After 30 minutes， you executed the following command：
SQL> SELECT reason，metric_value FROM dba_outstanding_alerts； REASON METRIC_VALUE
------------------------------------------------------------ ------------
Tablespace [TEST] is [28 percent]full 28.125
What could be the reason for the elimination of the other rows in the output（）
A.An Automatic Workload Repository snapshot has been taken recently.
B.The non-threshold-based alerts are transferred to DBA_ALERT_HISTORY.
C.The threshold alerts conditions are cleared and the alerts are transferred to DBA_ALERT_HISTORY.
D.The threshold alerts related to database metrics are permanently stored in DBA_ALERT_HISTORY but not the threshold alerts related to instance metrics.
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