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You notice performance degradation in your production Oracle 12c database. You want to know what caused this performance difference. Which method or feature should you use?
A. Database Replay
B. Automatic Database Diagnostic Monitor (ADDM) Compare Period report
C. Active Session History (ASH) report
D. SQL Performance Analyzer
Correct Answer: B
What can be automatically implemented after the SQL Tuning Advisor is run as part of the Automated Maintenance Task?
A. statistics recommendations
B. SQL profile recommendations
C. SQL statement restructure recommendations
D. creation of materialized views to improve query performance
Correct Answer: C
Automatic Shared Memory Management (ASMm) is enabled for your database instance, but parameters for the managed components are not defined.
You execute this command:
SQL> ALTER SYSTEM SET DB_CACHE_SIZE = 100M;
Which statement is true?
A. The minimum size for the standard buffer cache is 100 MB.
B. The maximum size for the standard buffer cache is 100 MB.
C. The minimum space guaranteed in the buffer cache for any server process is 100 MB.
D. The maximum space in the buffer cache that can be released for dynamic distribution is 100 MB.
E. The minimum size for all buffer caches is 100 MB.
Correct Answer: D
You have a production Oracle 12c database running on a host.
You want to install and create databases across multiple new machines that do not have any Oracle database software installed. You also want the new databases to have the same directory structure and components as your existing 12c
The steps in random order:
1.Create directory structures similar to the production database on all new machines. 2.Create a response file for Oracle Universal Installer (OUI) with the same configurations as the production database.
3.Create a database clone template for the database.
4.Run the Database Configuration Assistant (DBCA) to create the database.
5.Run OUI in graphical mode on each machine.
6.Run OUI in silent mode using the OUI response file.
Identify the required steps in the correct sequence to achieve the requirement with minimal human intervention.
A. 2, 1, 6, and 4
B. 2, 3, and 6
C. 3, 1, 5, and 6
D. 2, 3, 1, and 6
E. 1, 5, and 4
Correct Answer: D
Which two statements are true about a common user?
A. A common user connected to a pluggable database (PDB) can exercise privileges across other PDBs.
B. A common user with the create user privilege can create other common users, as well as local users.
C. A common user can be granted only a common role.
D. A common user can have a local schema in a PDB.
E. A common user always uses the global temporary tablespace that is defined at the CDB level as the default temporary tablespace.
Correct Answer: CD
Which three statements are true about persistent lightweight jobs?
A. A user cannot set privileges on them.
B. They generate large amounts of metadata.
C. They may be created as fully self-contained jobs.
D. They must reference an existing Scheduler Program.
E. The are useful when users need to create a large number of jobs quickly.
Correct Answer: CDE
Which three statements are true about compression of backup sets?
A. Compressed backups can only be written to media.
B. Binary compression creates performance overhead during a backup operation.
C. Unused blocks below the high-water mark are not backed up.
D. Compressed backups cannot have section size defined during a backup operation
E. It works only for locally managed tablespaces.
Correct Answer: BCE
You issue the RMAN commands:
RMAN> CONFIGURE DEFAULT DEVICE TYPE TO disk;
RKAN> CONFIGURE DEVICE TYPE DISK BACKUP TYPE TO COPY;
RMAN>CONFIGURE CONTROLFILE AUTOBACKUP ON;
RMAN> BACKUP DATABASE PLUS ARCHIVELOG DELETE INPUT;
Which three tasks are performed by the BACKUP DATABASE command?
A. switching the online redo log file
B. backing up all data files as image copies and archive log files, and deleting those archive log files
C. backing up only the used blocks in the data files
D. backing up all used and unused blocks in the data files
E. backing up all archived log files and marking them as obsolete
Correct Answer: ACE
A complete database backup to media is taken for your database every day. Which three actions would you take to improve backup performance?
A. Set the backup_tape_io_slaves parameter to true.
B. Set the dbwr_io_slaves parameter to a nonzero value if synchronous I/O is in use.
C. Configure large pool if not already done.
D. Remove the rate parameter, if specified, in the allocate channel command.
E. Always use RMAN compression for tape backups rather than the compression provided by media manager.
F. Always use synchronous I/O for the database.
Correct Answer: BCD
Tuning RMAN Backup Performance: Procedure Many factors can affect backup performance. Often, finding the solution to a slow backup is a process of trial and error. To get the best performance for a backup, follow the suggested steps in this section: Step 1: Remove RATE Parameters from Configured and Allocated Channels Step 2: If You Use Synchronous Disk I/O, Set DBWR_IO_SLAVES Step 3: If You Fail to Allocate Shared Memory, Set LARGE_POOL_SIZE Step 4: Tune RMAN Tape Streaming Performance Bottlenecks Step 5: Query V$ Views to Identify Bottlenecks Reference:https://docs.oracle.com/database/121/BRADV/rcmtunin.htm#BRADV172
For which three pieces of information can you use the RMAN list command?
A. stored scripts in the recovery catalog
B. available archived redo log files
C. backup sets and image copies that are obsolete
D. backups of tablespaces
E. backups that are marked obsolete according to the current retention policy
Correct Answer: ABD
Explanation: About the LIST Command: The primary purpose of the LIST command is to list backup and copies. For example, you can list: -Backups and proxy copies of a database, tablespace, datafile, archived redo log, or control file Backups that have expired -Backups restricted by time, path name, device type, tag, or recoverability -Archived redo log files and disk copies Reference:http://docs.oracle.com/cd/B28359_01/backup.111/b28270/rcmreprt.htm#BRADV89585
You want to export the pluggable database (PDB) hr pdb1 from the multitenant container database (CDB)CDB1 and import it into the cdb2 CDB as the emp_pdb1 PDB.
Examine the list of possible steps required to perform the task:
1.Create a PDB named emp_pdb1.
2.Export the hr_pdb1 PDB by using the full clause.
3.Open the emp_pdb1 PDB.
4.Mount the emp_pdb1 PDB.
5.Synchronize the emp_pdb1 PDB in restricted mode.
6.Copy the dump file to the Data Pump directory.
7.Create a Data Pump directory in the emp_pdb1 PDB.
8.Import data into emp_pdb1 with the full and remap clauses.
9.Create the same tablespaces in emp_pdb1 as in hr_pdb1 for new local user objects.
Identify the required steps in the correct order.
A. 2, 1, 3, 7, 6, and 8
B. 2, 1, 4, 5, 3, 7, 6, 9, and 8
C. 2, 1, 3, 7, 6, 9, and 8
D. 2, 1, 3, 5, 7, 6, and 8
Correct Answer: C
Because the step 2 says that you perfom an expdp with the full clause and you don\’t need to create the tablespaces when you perform the impdp. FULL=yes will export tablespace definitions. So no need step 9.
You wish to create jobs to satisfy these requirements:
Automatically bulk load data from a flat file.
Rebuild indexes on the SALES table after completion of the bulk load.
How would you create these jobs?
A. Create both jobs by using Scheduler raised events.
B. Create both jobs using application raised events.
C. Create one job to rebuild indexes using application raised events and another job to perform bulk load using Scheduler raised events.
D. Create one job to rebuild indexes using Scheduler raised events and another job to perform bulk load by using events raised by the application.
Correct Answer: C
The bulk loader would be started in response to a file watcher scheduler event and the indexes would be rebuilt in response to an application event raised by the bulk loader. Your application can raise an event to notify the Scheduler to start a job. A job started in this way is referred to as an event-based job. The job can optionally retrieve the message content of the event. References: https://docs.oracle.com/cd/B28359_01/server.111/b28310/scheduse008.htm#CHDIAJEB https://docs.oracle.com/cd/E18283_01/server.112/e17120/scheduse005.htm#CIABIEJA
Your Oracle 12c multitenant container database (CDB) contains multiple pluggable databases (PDBs). In the PDB hr_pdb, the common user c##admin and the local user b_admin have only the connect privilege.
You create a common role c##role1 with the create table and select any table privileges.
You then execute the commands:
SQL> GRANTc##role1 TO##Madmin CONTAINER=ALL;
SQL>CONNsys/[email protected]_PDB as sysdba
SQL> GRANTc##role1TO b_admin CONTAINER=CURRENT;
Which two statements are true?
A. C##admin can create and select any table, and grant the c##role1 role to users only in the root container.
B. B_admin can create and select any table in both the root container and Hr_pdb.
C. c##admin can create and select any table in the root container and all the PDBs.
D. B_admin can create and select any table only in hr_pdb.
E. The grant c##role1 to b_admin command returns an error because container should be set to ALL.
Correct Answer: CD
You want RMAN to make duplicate copies of data files when using the backup command.
What must you set using the RMAN configure command to achieve this?
A. MAXSETSIZE TO 2;
B. DEVICE TYPE DISK PARALLELISM 2 BACKUP TYPE TO BACKUPSET;
C. CHANNEL DEVICE TYPE DISK FORMAT \’/disk1/%U\’ , \’/disk2/%U\’;
D. DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 2;
Correct Answer: D
Configuring Backup Duplexing You can use the CONFIGURE … BACKUP COPIES command to specify how many copies of each backup piece should be created on the specified device type for the specified type of file. This type of backup is known as a duplexed backup set. The CONFIGURE settings for duplexing only affect backups of datafiles, control files, and archived logs into backup sets, and do not affect image copies. NOT A The CONFIGURE MAXSETSIZE command limits the size of backup sets created on a channel. This CONFIGURE setting applies to any channel, whether manually allocated or configured, when the BACKUP command is used to create backup sets. The default value is given in bytes and is rounded down to the lowest kilobyte value. Reference: http://docs.oracle.com/cd/B28359_01/backup.111/b28270/rcmconfa.htm#BRADV137
Which three types of failures are detected by the Data Recovery Advisor (DRA)?
A. loss of a non-critical data file
B. loss of a control file
C. physical data block corruption
D. logical data block corruption
E. loss of an archived redo log file
Correct Answer: BCD