Oracle Oracle Certifications 1Z0-062 Questions & Answers

• Question 251:

  You plan to implement the distributed database system in your company. You invoke Database

  Configuration Assistant (DBCA) to create a database on the server. During the installation, DBCA prompts

  you to specify the Global Database Name.

  What must this name be made up of?

  A. It must be made up of a database name and a domain name.

  B. It must be made up of the value in ORACLE_SID and HOSTNAME.

  C. It must be made up of the value that you plan to assign for INSTANCE_NAME and HOSTNAME.

  D. It must be made up of the value that you plan to assign for ORACLE_SID and SERVICE_NAMES.

  Correct Answer: A

  Using the DBCA to Create a Database (continued)

  3.

  Database Identification: Enter the Global Database Name in The form database_name.domain_name, and the system identifier (SID). The SID defaults lo the database name and uniquely identifies the instance associated with the database.

  4.

  Management Options: Use this page to set up your database so that it can be managed with Oracle Enterprise Manager. Select the default: "Configure the Database with Enterprise Manager." Optionally, this page allows you to configure alert notifications and daily disk backup area settings.

  Note: Yon must configure the listener before you can configure Enterprise Manager (as shown earlier).

• Question 252:

  In order to exploit some new storage tiers that have been provisioned by a storage administrator, the partitions of a large heap table must be moved to other tablespaces in your Oracle 12c database?

  Both local and global partitioned B-tree Indexes are defined on the table.

  A high volume of transactions access the table during the day and a medium volume of transactions access it at night and during weekends.

  Minimal disrupt ion to availability is required.

  Which three statements are true about this requirement? (Choose three.)

  A. The partitions can be moved online to new tablespaces.

  B. Global indexes must be rebuilt manually after moving the partitions.

  C. The partitions can be compressed in the same tablespaces.

  D. The partitions can be compressed in the new tablespaces.

  E. Local indexes must be rebuilt manually after moving the partitions.

  Correct Answer: ACD

  A: You can create and rebuild indexes online. Therefore, you can update base tables at the same time you are building or rebuilding indexes on that table. You can perform DML operations while the index build is taking place, but DDL operations are not allowed. Parallel execution is not supported when creating or rebuilding an index online.

  D: Moving (Rebuilding) Index-Organized Tables Because index-organized tables are primarily stored in a B-tree index, you can encounter fragmentation as a consequence of incremental updates. However, you can use the ALTER TABLE...MOVE statement to rebuild the index and reduce this fragmentation.

  C: If a table can be compressed in the new tablespace, also it can be compressed in the same tablespace.

  Incorrect:

  Not B, not E: Local and Global indexes can be automatically rebuild with UPDATE INDEXES when you

  move the table.

• Question 253:

  Which three are direct benefits of the multiprocess, multithreaded architecture of Oracle Database 12c when it is enabled? (Choose three.)

  A. Reduced logical I/O

  B. Reduced virtual memory utilization

  C. Improved parallel Execution performance

  D. Improved Serial Execution performance

  E. Reduced physical I/O

  F. Reduced CPU utilization

  Correct Answer: BCF

  * Multiprocess and Multithreaded Oracle Database Systems

  Multiprocess Oracle Database (also called multiuser Oracle Database) uses several processes to run different parts of the Oracle Database code and additional Oracle processes for the users--either one process for each connected user or one or more processes shared by multiple users. Most databases are multiuser because a primary advantage of a database is managing data needed by multiple users simultaneously.

  Each process in a database instance performs a specific job. By dividing the work of the database and applications into several processes, multiple users and applications can connect to an instance simultaneously while the system gives good performance.

  * In previous releases, Oracle processes did not run as threads on UNIX and Linux systems. Starting in Oracle Database 12c, the multithreaded Oracle Database model enables Oracle processes to execute as operating system threads in separate address spaces.

• Question 254:

  Your multitenant container database, CDB1, is running in ARCHIVELOG mode and has two pluggable databases, HR_PDB and ACCOUNTS_PDB. An RMAN backup exists for the database.

  You issue the command to open ACCOUNTS_PDB and find that the USERDATA.DBF data file for the default permanent tablespace USERDATA belonging to ACCOUNTS_PDB is corrupted.

  What should you do before executing the commands to restore and recover the data file in ACCOUNTS_PDB?

  A. Place CDB1 in the mount stage and then the USERDATA tablespace offline in ACCOUNTS_PDB.

  B. Place CDB1 in the mount stage and issue the ALTER PLUGGABLE DATABASE accounts_pdb CLOSE IMMEDIATE command.

  C. Issue the ALTER PLUGGABLE DATABASE accounts_pdb RESTRICTED command.

  D. Take the USERDATA tablespace offline in ACCOUNTS_PDB.

  Correct Answer: D

  * You can take an online tablespace offline so that it is temporarily unavailable for general use. The rest of the database remains open and available for users to access data. Conversely, you can bring an offline tablespace online to make the schema objects within the tablespace available to database users. The database must be open to alter the availability of a tablespace.

• Question 255:

  Which Oracle Database component is audited by default if the unified Auditing option is enabled?

  A. Oracle Data Pump

  B. Oracle Recovery Manager (RMAN)

  C. Oracle Label Security

  D. Oracle Database Vault

  E. Oracle Real Application Security

  Correct Answer: B

• Question 256:

  Your multitenant container (CDB) containing three pluggable databases (PDBs) is running in ARCHIVELOG mode. You find that the SYSAUX tablespace is corrupted in the root container.

  The steps to recover the tablespace are as follows:

  1.

  Mount the CDB.

  2.

  Close all the PDBs.

  3.

  Open the database.

  4.

  Apply the archive redo logs.

  5.

  Restore the data file.

  6.

  Take the SYSAUX tablespace offline.

  7.

  Place the SYSAUX tablespace online.

  8.

  Open all the PDBs with RESETLOGS.

  9.

  Open the database with RESETLOGS.

  10.

  Execute the command SHUTDOWN ABORT.

  Which option identifies the correct sequence to recover the SYSAUX tablespace?

  A. 6, 5, 4, 7

  B. 10, 1, 2, 5, 8

  C. 10, 1, 2, 5, 4, 9, 8

  D. 10, 1, 5, 8, 10

  Correct Answer: A

  RMAN> ALTER TABLESPACE sysaux OFFLINE IMMEDIATE;

  RMAN> RESTORE TABLESPACE sysaux;

  RMAN> RECOVER TABLESPACE sysaux;

  RMAN> ALTER TABLESPACE sysaux ONLINE;

  *

  Example:

  While evaluating the 12c beta3 I was not able to do the recover while testing "all pdb files lost".

  Cannot close the pdb as the system datafile was missing...

  So only option to recover was:

  Shutdown cdb (10)

  startup mount; (1)

  restore pluggable database

  recover pluggable database

  alter database open;

  alter pluggable database name open;

  Oracle support says: You should be able to close the pdb and restore/recover the system tablespace of

  PDB.

  *

  Inconsistent backups are usually created by taking online database backups. You can also make an

  inconsistent backup by backing up data files while a database is closed, either:

  / Immediately after the crash of an Oracle instance (or, in an Oracle RAC configuration, all instances) / After shutting down the database using SHUTDOWN ABORT

  Inconsistent backups are only useful if the database is in ARCHIVELOG mode and all archived redo logs created since the backup are available.

  * Open the database with the RESETLOGS option after finishing recovery: SQL> ALTER DATABASE OPEN RESETLOGS;

• Question 257:

  Which two statements are true about the use of the procedures listed in the v$sysaux_occupants.move_procedure column? (Choose two.)

  A. The procedure may be used for some components to relocate component data to the SYSAUX tablespace from its current tablespace.

  B. The procedure may be used for some components to relocate component data from the SYSAUX tablespace to another tablespace.

  C. All the components may be moved into SYSAUX tablespace.

  D. All the components may be moved from the SYSAUX tablespace.

  Correct Answer: AB

• Question 258:

  Which statement is true about Oracle Net Listener?

  A. It acts as the listening endpoint for the Oracle database instance for all local and non-local user connections.

  B. A single listener can service only one database instance and multiple remote client connections.

  C. Service registration with the listener is performed by the process monitor (PMON) process of each database instance.

  D. The listener.ora configuration file must be configured with one or more listening protocol addresses to allow remote users to connect to a database instance.

  E. The listener.ora configuration file must be located in the ORACLE_HOME/network/admin directly.

  Correct Answer: C

  https://docs.oracle.com/database/121/CNCPT/process.htm

• Question 259:

  You are administering a database stored in Automatic Storage Management (ASM). You use RMAN to back up the database and the MD_BACKUP command to back up the ASM metadata regularly. You lost an ASM disk group DG1 due to hardware failure.

  In which three ways can you re-create the lost disk group and restore the data? (Choose three.)

  A. Use the MD_RESTORE command to restore metadata for an existing disk group by passing the existing disk group name as an input parameter and use RMAN to restore the data.

  B. Use the MKDG command to restore the disk group with the same configuration as the backed-up disk group and data on the disk group.

  C. Use the MD_RESTORE command to restore the disk group with the changed disk group specification, failure group specification, name, and other attributes and use RMAN to restore the data.

  D. Use the MKDG command to restore the disk group with the same configuration as the backed-up disk group name and same set of disks and failure group configuration, and use RMAN to restore the data.

  E. Use the MD_RESTORE command to restore both the metadata and data for the failed disk group.

  F. Use the MKDG command to add a new disk group DG1 with the same or different specifications for failure group and other attributes and use RMAN to restore the data.

  Correct Answer: ACF

  AC (not E):

  The md_restore command allows you to restore a disk group from the metadata created by the

  md_backup command.

  md_restore can't restore data, only metadata.

• Question 260:

  Your multitenant container (CDB) contains two pluggable databases (PDB), HR_PDB and

  ACCOUNTS_PDB, both of which use the CDB tablespace. The temp file is called temp01.tmp.

  A user issues a query on a table on one of the PDBs and receives the following error:

  ERROR at line 1:

  ORA-01565: error in identifying file `/u01/app/oracle/oradata/CDB1/temp01.tmp'

  ORA-27037: unable to obtain file status

  Identify two ways to rectify the error.

  A. Add a new temp file to the temporary tablespace and drop the temp file that that produced the error.

  B. Shut down the database instance, restore the temp01.tmp file from the backup, and then restart the database.

  C. Take the temporary tablespace offline, recover the missing temp file by applying redo logs, and then bring the temporary tablespace online.

  D. Shutdown the database instance, restore and recover the temp file from the backup, and then open the database with RESETLOGS.

  E. Shut down the database instance and then restart the CDB and PDBs.

  Correct Answer: AE

  *

  Because temp files cannot be backed up and because no redo is ever generated for them, RMAN never restores or recovers temp files. RMAN does track the names of temp files, but only so that it can automatically re-create them when needed.

  *

  If you use RMAN in a Data Guard environment, then RMAN transparently converts primary control files to standby control files and vice versa. RMAN automatically updates file names for data files, online redo logs, standby redo logs, and temp files when you issue RESTORE and RECOVER.