Fast2test 1Z0-083問題集PDFで100%合格保証付き
1Z0-083ブレーン問題集でリアル試験最新問題2024年07月10日には283問題
質問 # 81
Which three are true about requirements for various FLASHBACK operations? (Choose three.)
- A. FLASHBACK drop requires that the RECYCLEBIN parameter be set to ON.
- B. FLASHBACK transaction query requires undo to retrieve all versions of a row that existed between two points in time.
- C. FLASHBACK DATA ARCHIVE requires undo to store all versions of all rows of a table being tracked.
- D. FLASHBACK version query requires undo to retrieve all versions of a row that existed between two points in time.
- E. FLASHBACK version query requires that the RECYCLEBIN parameter be set to ON.
- F. FLASHBACK drop requires undo to retrieve all versions of a row that existed between two points in time.
正解：A、B、D
解説：
Reference:
https://books.google.com.pk/books?id=0iwrL9P25Z0C&pg=PA35&lpg=PA35&dq=FLASHBACK+transaction
+query+requires+undo+to+retrieve+all+versions+of+a+row+that+existed+between+two+points+in
+time&source=bl&ots=MJnYl5CZ1u&sig=ACfU3U0dWP-NPd- U8uu3zbaoi3YZzT0FTQ&hl=en&sa=X&ved=2ahUKEwigi5_Jl9joAhXzUBUIHUh4DksQ6AEwAnoECAsQJg#v= onepage&q=FLASHBACK%20transaction%20query%20requires%20undo%20to%20retrieve%20all% 20versions%20of%20a%20row%20that%20existed%20between%20two%20points%20in%20time&f=false
https://docs.oracle.com/cd/E18283_01/server.112/e17120/tables011.htm
質問 # 82
Identify three benefits of Unified Auditing.
- A. Decreased use ofstorage to store audit trail rowsin the database.
- B. It guarantees zero-loss auditing.
- C. It improves overall auditing performance.
- D. The audit trail cannot be easily modified because it is read-only.
- E. It automatically audits Recovery Manager (RMAN) events.
正解：C、D、E
質問 # 83
Choose three. Which three are true about actions that can or cannot be performed by users with the SYSBACKUP privilege?
- A. They cannot drop tablespaces.
- B. They can view data from any data dictionary view or dynamic performance
- C. They can view data from any user-defined tables.
- D. They can drop any tablespace.
- E. They cannot create restore points.
- F. They can create any table.
正解：B、D、F
質問 # 84
Choose three. Which three are true about Audit policies in container databases (CDBs)?
- A. Fine-grained auditing policies defined in an application root must be manually synchronized by each application PDB contained in the application root.
- B. An application PDB cannot have a local audit policy.
- C. A common unified audit policy can be created at the CDB level.
- D. A common unified audit policy can be created at the application root level.
- E. All audit records are written to the audit trail in CDB$ROOT .
- F. Application-common unified audit policies defined in an application root must be manually synchronized by each application PDB contained in the application root.
正解：C、D、F
質問 # 85
Which two are true about the Oracle database methodology? (Choose two.)
- A. Tuning activities should stop once agreed service levels for performance have been met.
- B. The alert log should be used to find the database and instance areas most in need of tuning.
- C. SQL statements should always be tuned before tuning any file systems.
- D. The Oracle Database time model should be used to find the database and instance areas most in need of tuning.
- E. Tuning activities should stop once the user is satisfied with performance.
- F. The database instance memory should always be tuned before tuning any file systems.
正解：C、D
解説：
A is correct. It will show what the database is spending most time on, that (usually) indicates where tuning is required.
B and C relate to user experience. We (DBAs) should work with users, to help achieve their requirements. However, we can be proactive outside of this. Just because a user is happy - doesn't mean we can't make them "happier" by doing tuning activities before things get bad. So, neither of these should be true.
D is incorrect, memory is much less likely to be a culprit of an issue, than a filesystem I/O issue.
E is correct. We should never try to tune a file system first. If we make a file system change that fixes one SQL statement - it might harm a different SQL statement. However, if we tune the first SQL statement, it will have no impact on the rest of the system. Therefore, we should try to tune
"bad SQL" first.
F is incorrect - the alert log gives us little/no information to do with tuning.
質問 # 86
You notice that the performance of your production 24x7 Oracle 12c database has significantly degraded. Sometimes, you are not able to connect to the database instance because it hangs. How can you detect the cause of the degraded performance?
- A. by performing emergency monitoring using Real-Time Automatic Database Diagnostic Monitor (ADDM) to fetch data directly from SGA for analysis
- B. by running ADDM in diagnostic mode
- C. by using Active Session History (ASH) data and performing hang analysis
- D. by running ADDM to fetch information from the latest Automatic Workload Repository (AWR) snapshots
正解：A
質問 # 87
Which two are true about common objects? (Choose two.)
- A. They can be created only in an application root.
- B. They can be created only in CDB$ROOT.
- C. They can exist in user-defined schemas only in application containers.
- D. They can exist in CDB$ROOTand an application root.
- E. They can be extended data-linked in CDB$ROOT.
- F. They can be only metadata-linked in an application container.
正解：A、E
解説：
Explanation/Reference: https://blog.toadworld.com/2017/08/01/oracle-multi-tenant-application-containers-part-iii-sharing-of- data-in-application-common-objects
質問 # 88
You must transport the UNIVERSITY tablespace from one database to another.
The UNIVERSITY tablespace is currently open read/write.
The source and destination platforms have different endian formats. Examine this list of actions:
1.Make the UNIVERSITY tablespace read-only on the source system.
2.Export the UNIVERSITY tablespace metadata using EXPDP.
3.Convert the UNIVERSITY tablespace data fies to the destination platform format using RMAN on the source system.
4.Copy the UNIVERSITY tablespace data files to the destination system.
5.Copy the Data Pump dump set to the destination system.
6.Convert the UNIVERSITY tablespace data files to the destination platform format using RMAN on the destination system.
7.Import the UNIVERSITY tablespace metadata using IMPDP.
8.Make the UNIVERSITY tablespace read/write on the destination system.
Which is the minimum number of actions required, in the correct order, to transport the UNIVERSITY tablespace?
- A. 1, 2, 4, 5, 7, 8
- B. 1, 2, 4, 6, 7, 8
- C. 1, 2, 3, 4, 5, 7, 8
- D. 1, 2, 3, 4, 5, 6, 7, 8
- E. 2, 4, 5, 6, 7
正解：C
質問 # 89
Examine this command for creating pluggable database PDB2 in container database CDB2 CREATE PLUGGABLE DATABASE pdb2 ADMIN USER pdb2_adrn IDENTIFIED BY 12 3pdb ROLES=(CONNECT) ; Select three options, any one of which is required for it to execute successfully.
- A. Enable only OMF.
- B. Set the pdb_file_name_convert parameter and enable OMF.
- C. Set only the pdb_file_name_convert parameter.
- D. Add only the create_file_dest clause to the statement.
- E. Add the file_mame_comvert clause to the statement and enable Oracle Managed Files (OMF).
- F. Add the file_name_convert clause to the statement and set the pdb_file_name_convert parameter.
正解：B、E、F
質問 # 90
Which three are true about Recovery Manager (RMAN) active database duplication?
- A. No connection to the recovery catalog is required for active database duplication.
- B. Backup sets can be used to duplicate the active database.
- C. Pre-existing backups of the database to be duplicated are always used if they exist.
- D. Pre-existing backups of the database to be duplicated are required for the "pull" method of duplication.
- E. The active database must be duplicated while in OPEN state.
- F. Image copies can be used to duplicate the active database.
- G. Pre-existing backups of the database to be duplicated are required for the "push" method of duplication.
正解：A、B、F
質問 # 91
Choose the best answer. Examine this configuration: 1. CDB1 is an Oracle container database from an older release. 2. PDB1, PDB2, PDB3, and PDB4 are pluggable databases in CDB1. A priority list UpgrdList has these entries: 1, pdb2 2, pdb1, pdb3 You execute this command: $ /u01/app/oracle/product/18.1.0/ db_1/rdbms/admin/dbupgrade -L UpgrdList In which order will the upgrade occur?
- A. CDB$ROOT, PDB$SEED, PDB2, PDB1, PDB3, and PDB4
- B. CDB$ROOT, PDB$SEED, PDB1, PDB3, PDB2, and PDB4
- C. CDB$ROOT, PDB1, PDB2, PDB3, and PDB4
- D. CDB$ROOT, PDB$SEED, PDB2, PDB1, and PDB3
- E. CDB$ROOT, PDB2, PDB1, and PDB3
正解：A
質問 # 92
Examine this configuration:
1. The ORCLdatabase data files are in Automatic Storage Management (Oracle ASM) disk group +DATA.
2. ORCLuses disk group +FRAfor the Fast Recovery Area.
3. LISTENER is the listener for ORCL.
4. The database, listener, ASM instance, and ASM disk groups are managed by Oracle Restart.
5. All components are currently shut down.
You execute this command:
What is the outcome?
- A. Only the ORCLdatabase and the ASM instances are started.
- B. The ORCL database, the Oracle ASM instances, the +DATAand +FRAdisk groups, and the LISTENER are started.
- C. Only the ORCLdatabase instance and the +DATAand +FRAdisk groups are started.
- D. Only the ORCL database instance is started.
- E. Only the ORCLdatabase instance, the Oracle ASM instance, and the +DATAand +FRAdisk groups are started.
正解：E
質問 # 93
The USERS tablespace consists of data files 3 and 4 and must always be online in read/write mode. Which two are true about using RMAN to perform an open database back up of this tablespace? (Choose two.)
- A. The database must be registered in an RMAN catalog.
- B. Backups can be done incrementally.
- C. Backups must be done incrementally.
- D. Backups can be taken only if the database is in ARCHIVE LOG mode.
- E. Only consistent backups can be created.
- F. Backups must be contained in backup sets.
正解：B、D
質問 # 94
SQL Performance Analyzer (SPA) has reported several regressed SQL statements for one of your databases.
Which action could help in the performance management of these regressed SQL statements?
- A. Create an adaptive execution plan for each of the regressed statements
- B. Create SQL plan directives for each of the regressed statements.
- C. Use the SQL Access Advisor for each of the regressed statements.
- D. Use The SQL Tuning Advisor for each of the regressed statements.
正解：D
質問 # 95
Which two are true about data movement between a non-CDB and a PDB using Data Pump?
- A. Oracle attempts to convert common users to conventional users when moving schemas from a PDB to a non-CDB.
- B. Tablespaces are automatically created as needed while importing full exports in either a non-CDB or a PDB.
- C. Moving data from a PDB to a non-CDB is only possible by using transportable tablespace export and import.
- D. Oracle attempts to convert conventional database users to local users when moving schemas from a non-CDB to a PDB.
- E. Moving data from a non-CDB to a PDB is only possible by using conventional export and import.
- F. A new PDB is automatically created when importing a non-CDB into a CDB.
正解：B、F
質問 # 96
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