Oracle 10g OCP 043 题库 141-185题 共185题
141. The DB_BLOCK_CHECKING initialization parameter is set to FALSE. What level of block checking would be performed?
A. The Oracle database will not perform block checking for any of the data blocks.
B. The Oracle database will perform block checking for the default permanent tablespace only.
C. The Oracle database will perform block checking for the data blocks in all user tablespaces.
D. The Oracle database will perform block checking for the data blocks in the SYSTEM tablespace only.
E. The Oracle database will perform block checking for the data blocks in the SYSTEM and SYSAUX tablespaces.
Answer: D
142. View the Exhibit and examine the characteristics 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? Exhibit:
A. Segment Advisor
B. SQL Access Advisor
C. SQL Tuning Advisor
D. Memory Advisor
E. Automatic Database Diagnostic Monitor (ADDM)
Answer: A
143. What are the prerequisites for enabling Flashback Database? (Choose all that apply.)
A. The database must be started in the MOUNT EXCLUSIVE state.
B. The database must have multiplexed control files.
C. The database must be opened by using a text-based parameter file instead of a server parameter file (SPFILE).
D. The database must be in ARCHIVELOG mode.
E. The database must be in the NOMOUNT state.
F. The database must be opened in RESTRICTED mode.
Answer: A,D
144. Last night, a media failure caused the loss of a temporary file that belongs to your database. Which two things may happen this morning when you try to open your database? (Choose two.)
A. The database writer writes to a trace file, indicating that the temporary file is not found.
B. The database prompts for a database recovery.
C. The database opens normally.
D. The database gets mounted and throws an error indicating that the temporary file requires recovery.
Answer: A,C
145. You configured the flash recovery area in the database. Which two files would you expect to find in the flash recovery area? (Choose two.)
A. backup pieces
B. copies of all the parameter files
C. trace file generated using BACKUP CONTROLFILE TO TRACE
D. control file autobackups
Answer: A,D
146. The database is running in ARCHIVELOG mode and the FORMAT option is not configured in RMAN for disk backups. You configured the flash recovery area location and size by using the DB_RECOVERY_FILE_DEST and DB_RECOVERY_FILE_DEST_SIZE initialization parameters. Which statement is correct in this scenario?
A. If the FORMAT option to the RMAN BACKUP command is specified, then RMAN creates backup pieces and image copies in the flash recovery area with names in the Oracle Managed Files (OMF) format.
B. If any local destinations for LOG_ARCHIVE_DEST_n are set, then archived redo logs are stored in these destinations as well as in the flash recovery area.
C. If the flash recovery area location is configured using the DB_RECOVERY_FILE_DEST initialization parameter, then the RMAN backup of Oracle managed datafiles (OMF) only will go to the flash recovery area by default.
D. If no other destination is configured for recovery files, then RMAN places the control file autobackups in the flash recovery area by default.
Answer: D
147. You have created a resource plan, PROD_DB_PLAN, that uses the RATIO policy. The following consumer groups and their respective plan directives have been assigned to this resource plan:
Consumer group HIGH_CG with CPU_P1 as 10.
Consumer group MEDIUM_CG with CPU_P1 as 5.
Consumer group LOW_CG with CPU_P1 as 2.
Consumer group OTHER_GROUPS with CPU_P1 as 1.
Which statement is correct in this scenario?
A. The CPU allocation would be equal between the HIGH_CG and MEDIUM_CG consumer groups if there are no sessions existing for the LOW_CG and OTHER_GROUPS consumer groups.
B. The members of the HIGH_CG consumer group would get 10% of the CPU.
C. The plan PROD_DB_PLAN can have subplans.
D. The CPU allocation for the consumer groups would be based on the ratio defined for the CPU_P1.
Answer: D
148. You want an ASM instance to manage the files of your database. To achieve this objective, you specify the following parameters in the parameter file of the database:
INSTANCE_TYPE = RDBMS
DB_NAME = PROD
LARGE_POOL_SIZE = 8MB
DB_BLOCK_SIZE = 4K
LOG_ARCHIVE_DEST = +dgroupA
LOG_ARCHIVE_FORMAT = "$ORACLE_SID_%s_%t.%t"
DB_CREATE_FILE_DEST = +dgroupA
COMPATIBLE = 10.1.0.2.0
CONTROL_FILES = +dgroupA
Which parameter would be ignored while starting up the instance for the database PROD?
A. LARGE_POOL_SIZE
B. DB_CREATE_FILE_DEST
C. LOG_ARCHIVE_DEST
D. CONTROL_FILES
E. LOG_ARCHIVE_FORMAT
F. DB_BLOCK_SIZE
Answer: E
149. You lost the index tablespace in your database. You decided to re-create the index tablespace and the indexes in the tablespace. What methods can you use to re-create the indexes? (Choose all that apply.)
A. SQL scripts
B. Recovery Manager (RMAN) script
C. Data Pump
D. SQL*Loader
E. Flashback database
Answer: A,C
150. From the V$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 TIMED_STATISTICS parameter to TRUE in the parameter file
D. set the CPU levels for the users' group using Resource Manager
Answer: D
151. You noticed that large memory allocations for the Oracle backup and restore operations are causing a performance overhead on the shared pool. Which memory structure would you configure to avoid this performance overhead?
A. recycle buffer cache
B. large pool
C. streams pool
D. keep buffer cache
E. redo log buffer
Answer: B
152. In your Automatic Storage Management (ASM) instance, one of the nonempty disk groups, DGROUP1, is no longer required and you want this disk group to be removed. You execute the following command to achieve this objective:
DROP DISKGROUP dgroup1 EXCLUDING CONTENTS;
What would be the result of this command?
A. This command would result in an error because the disk group is not empty.
B. The command would distribute the contents of the specified disk group among all other disk groups and then drop the specified disk group.
C. The command would result in the contents being moved to the parent disk group and dropping of the disk group.
D. The command would result in the disk group being marked as INVALID because it cannot be dropped.
E. The command would drop the disk group, ignoring the EXCLUDING CONTENTS option.
Answer: A
153. View the Exhibit and examine the properties of the USERS tablespace. You execute the following statement to shrink the TRANS table existing on the USERS tablespace:
SQL> ALTER TABLE trans SHRINK SPACE CASCADE;
Which objects would be affected by this command? (Choose all that apply.) Exhibit:
A. the materialized views based on the TRANS table
B. the materialized views log of the TRANS table
C. the TRANS table
D. the B*Tree indexes on the TRANS table
E. the large object (LOB) segments of the TRANS table
Answer: C,D
154. Your database operates in ARCHIVELOG mode and all the tablespaces are online. Due to a user error, you decided to perform an incomplete recovery. Which two tasks would you be required to perform in the recovery process? (Choose two.)
A. open the database with the RESTRICTED option
B. open the database with the RESETLOGS option
C. recover to the required SCN only that data file in which the error occurred
D. recover all the data files to the same system change number (SCN)
Answer: B,D
155. Which two statements regarding compressed backups in Recovery Manager (RMAN) are true? (Choose two.)
A. Backup compression is disabled by default.
B. Backup compression can be used with both backup sets and image copies.
C. Backup compression cannot be enabled using the CONFIGURE command.
D. Backup compression works only if the COMPATIBILITY parameter is set to 9.0.0.0 or higher.
E. Backup compression applies to only backup sets.
F. Backup compression applies to only image copies.
Answer: A,E
156. You lost the PRODSTD tablespace, which was read-only. The tablespace was read-only when the last backup was taken. How would you recover the tablespace?
A. restore the tablespace from the backup, and then perform an incomplete recovery
B. restore the tablespace from the backup, and then apply all the redo information
C. restore all the data files in the database, and then perform an incomplete recovery
D. restore the tablespace from the backup
Answer: D
157. The loss of the control file forced you to re-create the control file. After re-creating it and opening the database, you find that some of the data files are named as MISSING nnnnn, where nnnnn is a five-digit number starting with 0. What could be the possible reason?
A. These are the data files that are corrupted.
B. There is no SYSAUX tablespace in your database
C. There is a read-only tablespace in your database.
D. These are the data files that cannot be recovered.
Answer: C
158. Every Sunday, consistent backups are performed on your database. Because of a user error, you performed an incomplete recovery on Tuesday and opened the database with the RESETLOGS option. A user error occurs again on Thursday, which necessitates an incomplete recovery. Sunday's backup is the most recent backup available. What would you do in this scenario?
A. recovery cannot be performed because a backup was not performed after the last incomplete recovery
B. restore all the files from Sunday's backup, and then recover up to the point in time when the RESETLOGS operation was performed on Tuesday
C. restore all the files from Sunday's backup, and open the database to reset the database to the point in time when the backup was performed on Sunday
D. restore all the files from Sunday's backup, and then perform an incomplete recovery up to the point in time when the user error occurred on Thursday
Answer: D
159. You executed the following FLASHBACK TABLE command:
FLASHBACK TABLE emp TO TIMESTAMP ('11:45','hh12:mi');
Which two statements are correct? (Choose two.)
A. The FLASHBACK TABLE statement will not be written to the alert log file.
B. The EMP table that was dropped by mistake from the database will be restored.
C. The changes made to the EMP table since the specified time will be undone.
D. The FLASHBACK TABLE statement will not maintain the existing indexes on the EMP table.
E. The FLASHBACK TABLE statement will be executed within a single transaction.
F. The list of transactions that have modified the EMP table since the specified time will be displayed.
Answer: C,E
160. Which two statements are correct regarding the Flashback Versions Query feature? (Choose two.)
A. You can use this feature to identify the committed versions of the rows, but not the uncommitted versions.
B. You can use this feature to identify the versions of V$ views.
C. You can use this feature to identify the inserts, deletes, and updates performed on a particular row but not the data definition language (DDL) operations performed on the table.
D. You can use this feature for a table only if row movement is enabled for the table.
E. You can use this feature to identify the versions of external and fixed tables.
Answer: A,C
161. The database has the data block size set to 8 KB. You need to import a tablespace with a 4 KB block size into the database. Which additional memory parameter(s) should be configured to perform a transportable tablespace import?
A. DB_4K_CACHE_SIZE only
B. DB_8K_CACHE_SIZE only
C. DB_BLOCK_SIZE and DB_4K_CACHE_SIZE
D. DB_BLOCK_SIZE and DB_8K_CACHE_SIZE
E. SGA_TARGET and DB_4K_CACHE_SIZE
F. DB_CACHE_SIZE only
Answer: A
162. You have created a job class, CUST_JOB_1, with two jobs, CUST_JOB_1_A and CUST_JOB_1_B. Which two statements are true? (Choose two.)
A. The member jobs would get dropped when the job class is dropped.
B. Both the jobs would be executed concurrently.
C. The member jobs would get disabled when the job class is dropped.
D. The attributes defined at the class level would be applied to both the jobs.
E. Jobs in the job class must have been assigned the same priority.
Answer: C,D
163. You are managing a database for which incremental backups can be very time consuming. In order to perform optimized incremental backups you enable the block change tracking feature. How would you instruct RMAN to use the block change tracking feature when performing incremental backups?
A. You need to mention it with every BACKUP command.
B. The block change tracking feature is used automatically by RMAN.
C. You need to configure it using the CONFIGURE command.
D. You need to set the necessary initialization parameters to direct RMAN to use the feature.
Answer: B
164. You configured the large pool for Oracle backup and restore operations. As a result, which component would require less memory?
A. streams pool
B. shared pool
C. log buffer
D. keep buffer cache
E. recycle buffer cache
Answer: B
165. You have only two redo log groups and these groups get overwritten several times in a day. Your database operates in NOARCHIVELOG mode and user-managed consistent backups are performed every Sunday night. On Thursday morning, you
find that an important table has been dropped and purged. With reference to this scenario, up to what point in time can the data be recovered?
A. until Thursday morning
B. until that point in time when the database is opened
C. until that point in time when the recovery is performed
D. until last Sunday's backup
E. until that point in time when the table is dropped and purged
F. until Wednesday evening
Answer: D
166. You are working on a database, where you have three redo log groups. When the database is down for a backup, an operating system (OS) user deletes all the redo log files in a group. What will happen when you open your database?
A. The instance starts, the database is mounted, but efforts to open the database fail, and an error about the missing redo log group is displayed.
B. Before the instance starts, you receive an error about the missing redo log files of a group.
C. The instance starts and the database opens with an error message written to the alert log file.
D. The instance starts and the database opens because two redo log groups still exist.
E. The instance starts and the database opens, but every attempt to write to redo log files fails with an error.
Answer: A
167. In your database, all the tablespaces are locally managed. You started Recovery Manager (RMAN) using recovery catalog. The following commands are used in the process of recovering the database by using the backup control file:
1.RESTORE CONTROLFILE;
2.RESTORE DATABASE;
3.ALTER DATABASE MOUNT;
4.SQL ALTER TABLESPACE temp ADD TEMPFILE
5.ALTER DATABASE OPEN RESETLOGS;
6.RECOVER DATABASE;
7.STARTUP NOMOUNT;
In what sequence would you use this process to perform the recovery?
A. 2, 7, 3, 5, 1, 6, 4
B. 2, 1, 7, 6, 3, 5, 4
C. 7, 1, 3, 2, 6, 5, 4
D. 7, 2, 3, 1, 4, 6, 5
Answer: C
168. You are working on an Oracle Database 10g database that operates in the ARCHIVELOG mode. At 06:00 p.m., you discovered that a table in the SYSTEM tablespace that does not belong to the data dictionary was dropped at 03:00 p.m. What would you do to recover the table?
A. use the Flashback Transaction Query feature to identify the relevant SQL statement and use it to undrop the table
B. restore the entire database from the most recent backup and open it
C. recover the table by using the Flashback Table feature
D. perform point-in-time recovery to recover the table
Answer: D
169. The EMPLOYEES table is stored in the USERS tablespace. You need to check if the EMPLOYEES table is affected by the block corruption found in the USERS tablespace. Which option would you use?
A. the RMAN LIST command
B. the DBNEWID utility
C. the RMAN REPORT command
D. the RMAN BLOCKRECOVER command
E. the RMAN CROSSCHECK command
F. the ANALYZE command
Answer: F
170. A media failure has occurred. This has resulted in all the members of the next log group being rendered inaccessible to the log writer process (LGWR) at a log switch. How does this failure affect the operational database?
A. The database allows only queries; no other statements are allowed.
B. The database re-creates the missing redo log files automatically.
C. The database continues to function normally with the existing files.
D. The database returns an error and the database instance shuts down.
E. The user sessions that generate redo logs are terminated automatically.
Answer: D
171. Very soon you will be performing maintenance operations. You would have several jobs to run as soon as the maintenance period starts. Which method would you use to create jobs without specifying the time period when the job should be run?
A. use DBMS_IJOB package
B. use Oracle Scheduler
C. use DBMS_JOB package
D. use Oracle Data Pump Export and Import
Answer: B
172. You enabled Automatic Shared Memory Management. The initialization parameters are set as shown below:
SGA_TARGET = 10GB
SGA_MAX_SIZE = 14GB
STREAMS_POOL_SIZE = 1GB
SHARED_POOL_SIZE = 3GB
Which two statements are correct in this scenario? (Choose two.)
A. A total of 14 GB memory will be allocated to the automatically tuned memory components.
B. Reducing the value for SGA_TARGET to 9 GB will automatically decrease the memory allocated to shared pool from 3 GB to 2 GB.
C. The value for SGA_TARGET can be increased up to a maximum of 14 GB.
D. A maximum of 3 GB can be allocated to shared pool.
E. Increasing the value for SGA_TARGET to 12 GB will automatically increase the memory allocated to autotuned parameters.
F. Increasing the value for SGA_TARGET will automatically increase the memory allocated for STREAMS_POOL_SIZE.
Answer: C,E
173. You need to create a schedule that will run a job on the second Friday of each month. What should the repeat interval of the schedule be set to?
A. FREQ = MONTHLY; BYDAY = 2FRI;
B. FREQ = MONTHLY; BYDAY = FRI(2);
C. FREQ = MONTHLY; BYDAY = FRI2;
D. FREQ = MONTHLY; BYDAY = -2FRI;
Answer: A
174. 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 errors out displaying the following message:
ERROR at line 1:
ORA-29371: pending area is not active
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. activate the Pending Area before creating the consumer group
B. create the Pending Area before creating the consumer group
C. increase the size of the database buffer cache to accommodate the Pending Area
D. increase the size of the shared pool to accommodate the Pending Area
E. increase the size of the large pool to accommodate the Pending Area
Answer: B
175. You have a read-only tablespace on read-only media. You want to perform a media recovery on the existing data files, but using a backup control file. The backup control file indicates that the status of the read-only tablespace was read/write when the control file was backed up. What should you consider?
A. take data files from the read-only tablespace offline before performing a recovery
B. recovery using backup control file is not possible, so restore all the files from the last full database backup, and then open the database
C. drop the read-only tablespace and re-create the tablespace after recovery
D. perform a recovery; status of the tablespace in control file will be changed automatically
Answer: A
176. Your production database is running in the ARCHIVELOG mode and the ARCn process is functional. You have two online redo log groups. Which three background processes would be involved when a log switch happens? (Choose three.)
A. log writer
B. archival
C. process monitor
D. system monitor
E. change tracking writer
F. database writer
Answer: A,B,F
177. On Monday, you dropped the DEPT table from your schema and then you re-created the DEPT table in your schema. On Wednesday, you have a requirement to restore the DEPT table from the recycle bin. Which statement is correct?
A. You cannot restore the DEPT table by using the Oracle Flashback Drop feature because a table with the name DEPT already exists in your schema.
B. You can restore the DEPT table by using the Oracle Flashback Drop feature, provided you use the RENAME TO clause.
C. You cannot restore the DEPT table by using the Oracle Flashback Drop feature because the contents of the recycle bin are purged every 12 hours by default.
D. You can restore the DEPT table by using the Oracle Flashback Drop feature and a system-generated name will be assigned to the restored table.
Answer: B
178. You have an Automatic Storage Management (ASM) instance managing the database files of your production database. The database contains ASM files and non-ASM files. Using Recovery Manager (RMAN), you migrate the complete production database to use the ASM instance. Which statement is true?
A. RMAN would relocate all the data files to an ASM disk group and other files to an operating system location, defined using Oracle Managed Files (OMF).
B. RMAN would relocate the ASM files to an ASM disk group and the non-ASM files to an operating system location, defined using OMF.
C. RMAN would relocate all the database files to an ASM disk group.
D. RMAN would change the file definitions in the control file to use the ASM but would not relocate the database files physically.
Answer: C
179. The backup retention policy is configured as RECOVERY WINDOW 2. You executed the following command in Recovery Manager (RMAN) against your database:
RMAN> REPORT OBSOLETE;
What would you see in the output?
A. a list of all those files that have been deleted in the last two days
B. a list of all those files that have been recovered within the last two days
C. a list of all the expired backups and copies
D. a list of backups and copies that are outside the range covered by the current retention policy
Answer: D
180. You are working on Oracle Database 10g, which is in ARCHIVELOG mode. All the archived log files are intact. In which scenario would performing a recovery require the opening of the database with the RESETLOGS option?
A. loss of one of the tablespaces
B. loss of a system data file
C. loss of one of the control files
D. loss of a tempfile
E. loss of the only member of an unarchived redo log group
F. loss of a member from each redo log group
Answer: E
181. View the Exhibit. You executed the following command to perform a backup of the USERS tablespace:
RMAN> BACKUP TABLESPACE USERS;
Which three types of files are backed up? (Choose three.)
Exhibit:
A. all the data files belonging to the USERS tablespace
B. password file
C. online redo log files
D. the current control file
E. archived redo log files
F. the current server parameter file
G. data files belonging to the USERS tablespace and all the default tablespaces
Answer: A,D,F
182. In which two conditions are resumable statements suspended? (Choose two.)
A. when a user exceeds the space quota
B. when a user session is terminated
C. when a table that is being accessed by the current transaction is not found
D. when a user manually suspends the statement
E. when the maximum extents of a segment is reached
Answer: A,E
183. You are connected to Recovery Manager (RMAN) without a recovery catalog. There is no copy of the control file available. You want to restore the control file from an autobackup. To retrieve the autobackup, you need the database ID (DBID). In which two sources would you find the DBID? (Choose two.)
A. the alert log file
B. the server parameter file
C. the formatted name of a control file autobackup
D. an RMAN session log file
E. the trace file
Answer: C,D
184. You executed the following command in Recovery Manager (RMAN) to perform a backup of the DETTBS tablespace:
RMAN> BACKUP TABLESPACE DETTBS;
Under which conditions would this command execute successfully? (Choose all that apply.)
A. The database is in NOMOUNT state.
B. The database is in NOARCHIVELOG mode and the tablespace is online.
C. The database is in NOARCHIVELOG mode and the tablespace is offline.
D. The database is in ARCHIVELOG mode and the tablespace is offline.
E. The database is in ARCHIVELOG mode and the tablespace is online.
Answer: C,D,E
185. Identify four uses of the Oracle Scheduler. (Choose four.)
A. enables Oracle database to schedule which processes execute on which processors in a multiple CPU environment
B. enables Oracle database to do patches according to a DBA-defined schedule
C. enables you to schedule the execution of jobs based on time
D. enables you to execute jobs in a clustered environment
E. enables you to periodically execute operating systemscript files located on the same server as the database
F. enables you to create a job that makes use of saved programs and schedules
G. enables you to automate the management of the jobs that are created using the DBMS_JOB package
Answer: C,D,E,F
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