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41 . You decided to change the location of the flash recovery area. You executed the following command:
ALTER SYSTEM SET DB_RECOVERY_FILE_DEST='+disk1' SCOPE=BOTH SID='*';
Which statement is true?
A. The location can be changed only if the flash recovery area is empty.
B. After executing the command, all new flash recovery area files will be created in the new location.
C. The command will generate an error because you cannot change the flash recovery area while the database is open.
D. All the existing files in the flash recovery area will be moved to the new location and all new Flash Recovery Area files will be created in the new location.
Answer: B
42. Exhibit
A user has inserted wrong department data in the DEPT3 table in the USERS tablespace. You use the Flashback Table functionality to rectify the erroneous inserts. While performing the recovery, you choose 2004343 as the Flashback SCN.
Which two statements are correct in this scenario? (Choose two.)
A. Only the row with DEPARTMENT_ID 290 would be flashed back.
B. The rows with DEPARTMENT_ID 290 and 300 would be flashed back.
C. The rows with DEPARTMENT_ID 290 and 280 would be flashed back.
D. You would have taken the USERS tablespace offline before starting the Flashback Table operation.
E. You would have enabled row movement for the DEPT3 table before starting the Flashback Table operation.
Answer: B, E
43. Using Oracle Scheduler you have scheduled two jobs, JOB_A and JOB_B, to run at 9:00 p.m. every Friday. You want both the jobs to use a single resource plan, WEEKEND_PLAN. Which task must have already been performed to enable you to achieve this objective?
A. A window must have been created with the WEEKEND_PLAN resource plan.
B. A program must have been created with the WEEKEND_PLAN resource plan.
C. A job class must have been created with the WEEKEND_PLAN resource plan.
D. A window group must have been created with the WEEKEND_PLAN resource plan.
Answer: C
Oracle 10g Scheduler 特性
http://blog.csdn.net/tianlesoftware/archive/2009/10/23/4715218.aspx
44. Your database is running on the automatic Program Global Area (PGA) memory management and Shared Memory Management mode. You want to increase the memory available for the SQL work areas. What would you do?
A. modify the HASH_AREA_SIZE initialization parameter
B. modify the PGA_AGGREGATE_TARGET initialization parameter
C. modify the WORK_AREASIZE_POLICY initialization parameter
D. increase the value of the SGA_TARGET initialization parameter
E. increase the value of the SGA_MAX_SIZE initialization parameter
F. increase the value of the SORT_AREA_SIZE initialization parameter
Answer: B
45. On Tuesday, a junior DBA dropped an important application user account, whose schema has important tables. You are asked to recover all the objects in the schema. On investigation, you find that the user account was dropped at 11:00 a.m. and
Sunday's backup is the most recent backup. Which flashback feature would you use?
A. Flashback Drop
B. Flashback Table
C. Flashback Database
D. Flashback Version Query
E. Flashback Transaction Query
Answer: C
46. A redo log file is corrupted while the database is open; as a consequence, database operations are stopped because archiving cannot continue. What would you do to solve the problem?
A. clear the redo log group
B. perform redo log file import
C. perform an incomplete recovery
D. perform a redo log recovery using Recovery Manager (RMAN)
E. shut down the database and open the database in the NOARCHIVELOG mode
Answer: A
47. You are working on an Oracle Database 10g database. Because of data loss, you decided to perform a Flashback Database operation using the following command:
SQL> FLASHBACK DATABASE TO TIMESTAMP(SYSDATE ?5/24);
Which two statements are true? (Choose two.)
A. SYSDATE should not be used with TIMESTAMP.
B. The database must have multiplexed redo log files.
C. The database must be in the MOUNT state to execute the command.
D. The database must be opened with the RESETLOGS option after the flashback operation.
E. The entire database needs to be restored from the most recent backup before the flashback operation.
Answer: C, D
The database must be mounted in exclusive mode to issue the FLASHBACK DATABASE command and must be opened with the RESETLOGS option when finished.
48. You work as a database administrator at Certkiller .com. In your test database, you find that a user's session is executing a lot of SQL statements, resulting in the generation of a large number of trace files. While investigating the reason, you find that SQL trace has been enabled at the instance level. You want to disable SQL trace, remotely, only for that user session to reduce the volume of trace data being generated. How do you achieve this objective?
A. by setting the SQL_TRACE parameter to FALSE in the parameter file
B. by using DBMS_MONITOR.SESSION_TRACE_DISABLE to disable the tracing for the user session
C. by setting the SQL_TRACE parameter to FALSE by using the ALTER SYSTEM command in the user session
D. by setting the SQL_TRACE parameter to FALSE by using the ALTER SESSION command in the user session
Answer: B
49. You execute the following command to enable a session in resumable mode:
SQL> ALTER SESSION ENABLE RESUMABLE TIMEOUT 60;
What is the impact of a timeout on the statements being suspended?
A. The statements remain suspended for at least 60 seconds.
B. The statements are suspended for 60 seconds and then they are executed.
C. The suspended statements error out if the problem is not rectified within 60 seconds.
D. The statements are automatically suspended 60 seconds after an error is received, and then attempt to execute normally again.
Answer: C
50. You are managing an Oracle Database 10g database that uses Oracle Managed Files (OMF). You enabled the block change tracking feature for the database. Which statement regarding the change tracking file is true?
A. One block change tracking file is created for each data file. By default, the file is created in DB_CREATE_FILE_DEST.
B. One block change tracking file is created for each data file. By default, the file is created in BACKGROUND_DUMP_DEST.
C. One block change tracking file is created for the database. By default, the file is created in DB_CREATE_FILE_DEST.
D. One block change tracking file is created for the database. By default, the file is created in BACKGROUND_DUMP_DEST.
Answer: C
51. You want to use the SQL Tuning Advisor to generate recommendations for badly written SQL statements in your development environment. Which three sources can you select for the advisor to analyze? (Choose three.)
A. Top SQL
B. snapshots
C. SQL Tuning sets
D. index access path
E. optimizer statistics
F. materialized view logs
Answer: A, C, D
52. The loss of which two types of files may require a recovery with the RESETLOGS option?(Choose two.)
A. control files
B. password file
C. archived log files
D. system-critical data files for which all the redo entries are present
E. non-system-critical data files for which all the redo entries are present
Answer: A, C
53. There was media failure and you need to check the data files for any block corruption. Which option would you use to create a report on any corruptions found within the database?
A. the DBNEWID utility
B. the DBVERIFY utility
C. the ANALYZE command
D. the RMAN REPORT command
E. the RMAN CROSSCHECK command
F. the CHECK_OBJECT procedure of the DBMS_REPAIR package
Answer: B
54. You find that the execution time of reports in your datawarehouse application is significantly high. You suspect the lack of indexes to be the reason for the degradation in performance. Which advisory component would you refer to, in order to determine the appropriate indexes?
A. Memory Advisor
B. Segment Advisor
C. SQL Access Advisor
D. Automatic Workload Repository (AWR)
E. Automatic Database Diagnostic Monitor (ADDM)
Answer: C
55. You have created a resource plan, PROD_DB_PLAN, with the following consumer groups with the respective plan directives:
Consumer group SALES with CPU_P1as 60 and DEGREE_OF_PARALLELISM as 4.
Consumer group MARKET with CPU_P1 as 20.
Consumer group DEV with CPU_P1 as 20.
Consumer group OTHERS with CPU_P1as 0 and CPU_P2 as 100.
Which two statements are correct in this scenario? (Choose two.)
A. The maximum degree of parallelism for the members of the consumer groups is 4.
B. The CPU allocation will always be equal for the consumer groups MARKET and DEV.
C. The OTHERS consumer group would get 100% of the CPU if there are unused level 1 CPU resources.
D. The SALES and MARKET consumer groups would get 100% of the CPU if there are unused level 2 CPU resources.
E. The maximum degree of parallelism for the members of the consumer group SALES is 4 with no restriction for the remaining groups.
Answer: C, E
56. A user executes a query on the EMP table, which contains thousands of rows, to get details about employees in one of the
departments. The user receives the following error:
SQL> SELECT ename FROM emp WHERE deptno=10 ORDER BY sal;
SELECT ename FROM emp WHERE deptno=10 ORDER BY sal
ERROR at line 1:
ORA-01157: cannot identify/lock data file 201 - see DBWR trace file
ORA-01110: data file 201: '/u01/app/oracle/oradata/orcl/temp01.dbf'
What is a possible reason?
A. The tempfile belonging to the default temporary tablespace is missing.
B. The database is opened in restricted mode, so queries are not allowed
C. The default temporary tablespace required to execute the query is offline.
D. The default temporary tablespace required to execute the query is dropped.
E. The default temporary tablespace required to execute the query is read-only.
Answer: A
57. You executed the following command in Recovery Manager (RMAN):
RMAN> RESTORE CONTROLFILE;
Which operation must you perform before this command is executed?
A. back up the control file to trace
B. bring database to the MOUNT state
C. open a connection to the RMAN recovery catalog, which contains the RMAN metadata for the target database
D. set the database ID (DBID), but only if the DB_NAME parameter associated with the target database is unique in the recovery catalog
Answer: C
58. Exhibit
Using Database Control, you have scheduled a job to shrink the TRANS table residing on the TT tablespace. The job would run at 5:00 p.m. every Friday. When you examine the space usage of the table after the completion of the job, you find that the table has not been shrunk. What could have been the reason for this?
A. The tablespace that contains the TRANS table is online.
B. The tablespace that contains the TRANS table is permanent.
C. The tablespace that contains the TRANS table is locally managed.
D. The segment space management of the tablespace that contains the TRANS table is manual in nature.
Answer: D
59. The warning and critical threshold values have been set to 85% and 97%, respectively, for one of the tablespaces. The current tablespace space usage is 54%. You modify the warning threshold to be 50 % and critical threshold to be 53% in Database Control. Which statement is true?
A. The new setting would be applied but no alerts would be raised immediately.
B. The new setting would be applied and an alert would be raised immediately.
C. The new setting would be ignored because the tablespace space usage is more than the specified threshold value.
D. The new setting would cause an error because the tablespace space usage is more than the specified threshold value.
Answer: A
60. You defined the Recovery Manager (RMAN) retention policy to recovery window of 7 days by executing the following command:
RMAN> CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS;
When a backup is performed, what would be the status of this backup after seven days?
A. The backup would be marked as invalid.
B. The backup would be marked as obsolete.
C. The backup would be removed from the media.
D. The backup would be removed from the RMAN repository.
Answer: B
61. You work as a database administrator at Certkiller .com. You are working in an online transaction processing (OLTP) environment. You realize that the salary for an employee, John, has been accidentally modified in the EMPLOYEES table. Two days ago, the data was in the correct state. Flashback logs generated during last two days are available in the flash recovery area. Which option would you choose to bring the data to the correct state while ensuring that no other data in the same table is affected?
A. perform point-in-time recovery
B. perform a Flashback Table operation to restore the table to the state it was in two days ago
C. perform a Flashback Database operation to restore the database to the state it was in two days ago
D. perform Flashback Versions Query and Flashback Transaction Query to determine all the necessary undo SQL statements, and then use them for recovery
Answer: D
62. When performing a backup using Recovery Manager (RMAN), which four types of files can be backed up with the RMAN BACKUPcommand? (Choose four.)
A. data file
B. password file
C. archivelog file
D. temporary file
E. online redo log file
F. the current control file
G. the tnsnames.ora file
H. current server parameter file
Answer: A, C, F, H
63. You were recently hired by Certkiller .com as a database administrator. You are asked to find out whether the currently functional listener process, named L1, has been password protected or not. You are not familiar with the file system of the new organization. How would you accomplish the task?
A. by using the STATUS command of the Listener control utility
B. by using the STATUS L1 command of the Listener control utility
C. by using the SHOW RULES command of the Listener control utility
D. by using the SET PASSWORD command of the Listener control utility
E. by searching for the PASSWORD_LISTENER entry in the listener.ora file
Answer: B
64. These are the details about V$FLASHBACK_DATABASE_STAT:
SQL> DESC v$FLASHBACK_DATABASE_STAT
Name Null Type
BEGIN_TIME DATE
END_TIME DATE
FLASHBACK_DATA NUMBER
DB_DATA NUMBER
REDO_DATA NUMBER
ESTIMATED_FLASHBACK_SIZE NUMBER
Which two statements regarding the V$FLASHBACK_DATABASE_STAT view are true? (Choose two.)
A. BEGIN_TIME is the time at which Flashback logging is enabled.
B. END_TIME is the time at which the query is executed on the view.
C. REDO_DATA is the number of bytes of redo data written during the interval.
D. This view contains information about flashback data pertaining to the last 24 hours.
E. FLASHBACK_DATA is the amount of flashback data generated since the database was opened.
Answer: C, D
65. You lost a temporary file that belongs to the default temporary tablespace in your database. From the options provided, which approach would you take to solve the problem?
A. flash back the database
B. import the temporary tablespace from the last export
C. restore all the data files and temporary files from the last full database backup and perform a recovery
D. not perform a recovery, but create a new temporary tablespace, make it the default temporary tablespace and then drop the old tablespace
Answer: D
66. Which two statements are correct regarding the Oracle Flashback Drop feature? (Choose two.)
A. Recycle bin exists for the tables only in non-SYSTEM, locally managed tablespaces.
B. You can flash back a dropped table provided row movement has been enabled on the table.
C. If you drop an index before dropping its associated table, then the recovery of the index is not supported when you flash back the dropped table.
D. When you execute the DROP TABLESPACE? INCLUDING CONTENTS command, the objects in the tablespace are places in the recycle bin.
E. When a dropped table is moved to the recycle bin, only the table is renamed to a system-generated name; its associated objects and constraints are not renamed.
F. If you drop a table that is protected by the recycle bin, then associated bitmap-joined indexes and materialized view logs are also stored in the recycle bin.
Answer: A, C
67. You want to create a consumer group, GROUP1, and you execute the following command in the command-line interface:
SQL> EXEC DBMS_RESOURCE_MANAGER.CREATE_CONSUMER_GROUP (CONSUMER_GROUP =>'group1', COMMENT => 'New Group');
This command errorsout displaying the following message:
ERROR at line 1:
ORA-01031: insufficient privileges
ORA-06512: at "SYS.DBMS_RMIN", line 115
ORA-06512: at SYS.DBMS_RESOURCE_MANAGER", line 108
ORA-06512: at line 1
What action would you take to overcome this error?
A. grant SYSDBA to the user
B. grant SYSOPER to the user
C. grant the RESOURCE role to the user
D. use the GRANT command to grant the ADMINISTER_RESOURCE_MANAGER privilege to the use
E. grant the ADMINISTER_RESOURCE_MANAGER privilege to the user by using the
DBMS_RESOURCE_MANAGER_PRIVS package
Answer: E
68. You noticed that the index tablespace in your database requires a recovery. However, instead of performing a media recovery, you decided to re-create the indexes in a new tablespace. Which two options would you use to reduce the time it takes to re-create the indexes? (Choose two.)
A. ONLINE
B. REVERSE
C. PARALLEL
D. COMPRESS
E. NOLOGGING
F. COMPUTE STATISTICS
Answer: C, E
69. In the parameter file of your production database, the FAST_START_MTTR_TARGET parameter is set to 300 to optimize
instance recovery. While observing the performance of the database during instance recovery, you find that the redo log files are not sized properly to support this activity. Which two sources could you use to determine the optimal size of the redo log files?
(Choose two.)
A. the V$LOG view
B. the V$DBFILE view
C. the V$LOGFILE view
D. the V$INSTANCE_RECOVERY view
E. Oracle Enterprise Manager Database Control
Answer: D, E
70. Why would you use the following FLASHBACK TABLE command?
FLASHBACK TABLE emp TO TIMESTAMP ('11:45'.'hh12:mi');
A. to undo the changes made to the EMP table since the specified time
B. to restore the EMP table that was wrongly dropped from the database
C. to view the transactions that have modified the EMP table since the specified time
D. to view the changes made to the EMP table for one or more rows since the specified time
Answer: A
71. What effect should the loss of an index tablespace have on an Oracle instance that is running?
A. instance hangs
B. instance gets aborted
C. instance continues running
D. instance gets restarted automatically
Answer: C
72. By using the transaction identifier provided by ______ for a particular row change, you can use the Flashback Transaction Query to see the operation performed by the transaction.
A. Flashback Table
B. Flashback Database
C. Flashback Version Query
D. The RMAN REPORT command
E. The DBA_PENDING_TRANSACTIONS view
Answer: C
73. You work as a database administrator at Certkiller .com. Manually, you set the consumer group of all of the newly created users to MYDB_GRP. You want the users to be able to change their consumer groups as per the application requirement.
What was the first step that was needed in the process to achieve this objective?
A. The user must have been granted the DBA role.
B. The user must have been granted the switch privilege as a part of a role.
C. The user must have been granted the Resource Manager administrator privilege.
D. The user must have been granted the switch privilege by using the DBMS_RESOURCE_MANAGER_PRIVS package.
Answer: D
74. While setting up the threshold for tablespace space usage metrics for one of your tablespaces, you define the critical threshold as 60% and warning threshold as 75%. What would be the result of this setting?
A. It would result in an error because the warning threshold cannot be more than the critical threshold.
B. The warning threshold is ignored and alerts would be generated when space usage exceeds the critical threshold.
C. The critical threshold is ignored and alerts would be generated when space usage exceeds the warning threshold.
D. Both threshold values are used and alerts are generated when space usage exceeds the respective threshold values.
Answer: A
75. You have created a resource plan, DB_PLAN, using DBMS_RESOURCE_MANAGER.CREATE_SIMPLE_PLAN and you want to impose a restriction on utilization of resources by the database users. Which step must be performed before you can start using the resource plan?
A. assign users to consumer groups
B. set the resource plan for the instance
C. configure a simple resource plan and specify plan directives
D. configure a complex resource plan and specify plan directives
Answer: A
76. Exhibit
Viewing the Exhibit and examine the Flashback Database architecture. Identify the missing component (shown with a "?`"= in the Flashback Database architecture.
A. DBWn
B. RVWR
C. ARCH
D. RECO
E. TRWR
Answer: B
77. Case 1:
1. Shut down the database and perform a backup.
2. Restore all the data files.
3. Mount the database.
4. Recover the database.
5. Without applying all the redo log files, open the database using the RESETLOGS option.
6. Back up the database.
Case 2:
1. Shut down the database and perform a backup.
2. Restore only the data files of the tablespace where user error damaged the data.
3. Mount the database.
4. Recover the database.
5. Open the database with the RESETLOGS option.
6. Back up the database.
Case 3:
1. Shut down the database.
2. Restore the data files.
3. Open the database.
4. Perform recovery to the current point in time.
Which case has the correct steps for an incomplete recovery?
A. Only case 1
B. Only case 2
C. Only case 3
D. Case 1 and 2
E. Case 2 and 3
F. Case 1 and 3
G. All cases, case 1, case 2, case 3
Answer: A
78. You observe that the senior database administrator always uses the following command when connecting to Recovery Manager (RMAN), and then starts executing commands to backup the database files: % rman target / .
What would be the effect of this command?
A. RMAN would use the current operating system location to place the backup.
B. RMAN would use the control file of the target database to maintain the backup.
C. RMAN would use the recovery catalog of the target database to maintain the backup.
D. RMAN would use the control file of the target database to maintain the backup metadata.
E. RMAN would use the recovery catalog of the target database to maintain the backup metadata.
Answer: D
79. You disabled the Flashback Database feature by using the following command:
SQL> ALTER DATABASE FLASHBACK OFF;
What would be the effect of this command on the existing flashback logs?
A. Flashback logs are not deleted.
B. Flashback logs are deleted automatically.
C. Flashback logs are deleted only if you are using Recovery Manager (RMAN)
D. Flashback logs are deleted only if you are using Oracle Manager Files (OFM)
E. Flashback logs are deleted only if you are using Automatic Storage Management (ASM)
Answer: B
80. 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 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
Answer: B
81. You have a disk group, DGROUP1, with three disk and NORMAL redundancy. You execute the following command to create a template for the disk group:
ALTER DISKGROUP dgroup1 ADD TEMPLATE my_temp ATTRIBUTES (MIRROR FINE);
Which statement is true?
A. When a file is created in DGROUP1 with the template, it would have three-way mirroring.
B. When a file is created in DGROUP1, the MY_TEMP template becomes the default template.
C. When a file is created in DGROUP1 with the template, it would have two-way mirroring and file striping.
D. When a file is created in DGROUP1 with the template, it would have three-way mirroring and file striping.
E. When a file is created in DGROUP1 with the template, it would have two-way mirroring but no file striping.
Answer: C
82. You lost the index tablespace in your database. You are not able to use tablespace point-in-time recovery on the index tablespace. What could be the reason for this?
A. The index tablespace contains bitmap indexes.
B. The index tablespace contains more than one data file.
C. The index tablespace supports only complete recovery.
D. The index tablespace is not a dictionary-managed tablespace.
E. There is a dependency relationship between a table and its indexes.
Answer: E
83. 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 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 profile.
C. Set the CPU levels for the user's group using Resource Manager.
D. Set the TIMED_STATISTICS parameter to TRUE in the parameter file.
Answer: C
84. Exhibit:
View the Exhibit and examine the characteristic of the USERS tablespace. You observe that a large volume of inserts and deletes are happening on the TRANS table in the USERS tablespace and you suspect that the TRANS table is fragmented. Which advisory component would you refer to, in order to find information about table fragmentation?
A. Memory Advisor
B. Segment Advisor
C. SLQ Tuning Advisor
D. SLQ Access Advisor
E. Automatic Database Diagnostic Monitor (ADDM)
Answer: B
85. A data file become corrupted in your database due to bad sectors on the disk. Because of corruption, you lost all the important tables in that data file. Which method would you use for recovery?
A. Flash back all the tables in the data file, one by one.
B. Restore the data file to a new location and perform a media recovery.
C. Flash back the database, there is no need to restore the data file.
D. Restore the data file from the most recent backup and flash the database.
Answer: B
86. For which two SQL statements can you use the Flashback Table feature to revert a table to its previous state? (Choose two)
A. UPDATE TABLE
B. CREATE CLUSTER
C. TRUNCATE TABLE
D. ALTER TABLE MOVE
E. INSERT INTO...VALUES
F. ALTER TABLE...DROP COLUMN
G. ALTER TABLE...DROP PARTITION
Answer: A, E
87. What purpose would you achieve by enabling the block change tracking feature?
A. Eliminate the necessity for backups.
B. Perform optimized image copy backups.
C. Perform optimized incremental backups.
D. Enable checkpoint (CKPT) to perform checkpointing at every block change.
E. Enable database writer (DBWn) to write changed blocks to data files faster.
Answer: C
88. You execute the following RMAN command in the order shown below:
BACKUP VALIDATE DATABASE;
BLOCKRECOVER CORRUPTION LIST;
What will these commands do?
A. Create a backup of the database and recover all corrupted blocks found in the backup.
B. Run a backup validation and list all the logically corrupt blocks as well as physically corrupt blocks in the database.
C. Run a backup validation to populate V$COPY_CORRUPTION view, and then list any corrupt blocks recorded in the view.
D. Run a backup validation to populate V$DATABASE_BLOCK_CORRUPTION view, and then repair any corrupt blocks recorded in the view.
E. Run a backup validation, repair any corrupt blocks found during the validation process, and then update V$DATABASE_BLOCK_CORRUPTION view to indicate which corrupt blocks have been repaired.
Answer: D
89. In Recovery Manager (RMAN), you have set control file autobackup to ON by using the following command:
CONFIGURE CONTROLFILE AUTOBACKUP ON;
Which two events would cause the control file to be backed up automatically? (Choose two)
A. A tablespace is taken offline.
B. The database instance is restarted.
C. A new data file is added to an existing tablespace.
D. A successful backup is recorded in the RMAN repository.
E. The RMAN connection is disconnected from the target database.
Answer: C, D
90. You are working on an Oracle Database 10g database. For which purposes would you use the Flashback Transaction Query feature? (Choose all that apply)
A. To recover a dropped table.
B. To recover a dropped schema.
C. To recover data from a truncated table.
D. To view changes made by all the transactions during a given period of time.
E. To view changes made by a single transaction during a given period of time.
Answer: D, E
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