Latest 1Z0-083 Actual Free Exam Questions Updated 279 Questions [Q28-Q46]

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Latest 1Z0-083 Actual Free Exam Questions Updated 279 Questions

Free 1Z0-083 Exam Braindumps certification guide Q&A

NO.28 While backing up to the Oracle Fast Recovery Area (FRA), you determined the backup is taking too long and suspect a performance bottleneck.
Which three are true about diagnosing and tuning these problems? (Choose three.)

If an RMAN BACKUP VALIDATE command takes roughly the same time as an actual backup, then both read and write I/O are likely bottlenecks.

Setting DBWR_IO_SLAVES to a non zero value can improve backup performance when using synchronous I/O.

If an RMAN BACKUP VALIDATE command takes noticeably less than an actual backup, then write I/O is a likely bottleneck.

If an RMAN BACKUP VALIDATE command takes roughly the same time as an actual backup, then read I/O is a likely bottleneck.

Data files with a high value in V$BACKUP_SYNC_IO.DISCRETE_BYTES_PER_SECOND are a potential performance bottleneck when synchronous I/O is used.

Setting DBWR_IO_SLAVESto a non zero value can improve backup performance when using asynchronous I/O/

Data files with a high value in V$BACKUP_ASYNC_IO.SHORT_WAITS are a potential performance bottleneck when asynchronous I/O is used.

NO.29 Which two are facets of performance planning that should always be considered or implemented for an Oracle Database environment? (Choose two.)

defining primary keys for all tables to speed up all queries

using check constraints to speed up updates

defining foreign keys for all tables to speed up joins

the physical data model

the configuration of storage arrays

NO.30 Examine this command: $ rhpctl move database -sourcehome Oracle_home_path -destinationhome Oracle_home_path For which two purposes can you use this command? (Choose two.)

to switch an existing Oracle Database home to a newer release of Oracle software on the same server

to switch to a read-only Oracle home

to switch back to the previous Oracle home as part of a rollback operation

to switch the Oracle Database home when using a centralized Rapid Home Provisioning server

to switch to a patched Oracle Database home

NO.31 Which three are true about thresholds, metrics, and server-generated alerts? (Choose three.)

All metrics are instance related.

Cleared stateful alerts are displayed by querying DBA_ALERT_HISTORY.

A space usage management alert is automatically cleared after the underlying problem is resolved.

They are generated by SMON when a tablespace is 97% full.

Metrics are statistical counts for a specific unit.

STATISTICS_LEVEL must be set to ALL to generate alerts.

NO.32 Which three statements are true about the keystore storage framework for transparent data encryption?

It facilitates and helps to enforce keystore backup requirements.

It handles encrypted data without modifying applications.

It enables a keystore to be stored only in a file on a file system.

It enables separation of duties between the database administrator and the security administrator.

It transparently decrypts data for the database users and applications that access this data.

It helps to track encryption keys and implement requirements such as keystore password rotation and master encryption key reset or re-key operations.

NO.33 Which two are true about Oracle instance recovery?

Recovery reads redo until the end of the redo thread, and then opens the database, smon then rolls back any dead transactions.

Recovery begins from the beginning of the current redo log group.

Recovery begins from the start of any active redo log group or the start of the current log group if no other group is active.

Recovery reads redo until the end of the redo thread, smon rolls back any dead transactions, and then the database is opened.

Recovery begins from the last checkpoint position that was recorded in the control file by the checkpoint process (ckpt).

Recovery begins from the last checkpoint position that was calculated by the Database Writer before instance failure.

NO.34 Examine this configuration:
1.The ORCL database data files are in Automatic Storage Management (Oracle ASM) disk group +DATA.
2.ORCL uses disk group +FRA for 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?

The ORCL database, the Oracle ASM instances, the +DATA and +FRA disk groups, and the LISTENER are started.

Only the ORCL database instance is started.

Only the ORCL database and the ASM instances are started.

Only the ORCL database instance, the Oracle ASM instance, and the +DATA and +FRA disk groups are started.

Only the ORCL database instance and the +DATA and +FRA disk groups are started.

NO.35 Which four are true about duplicating a database using Recovery Manager (RMAN)? (Choose four.)

Duplication can be done by having the auxiliary databaseinstance pull backup sets from the target database instance.

A connection to an auxiliary instance is always required.

A subset of the target database can be duplicated.

A new DBID is always created for the duplicated database.

A connection tothe recovery catalog instance is always required.

A backup of the target database is always required.

Duplication can be done by having the target database instance push copies to the auxiliary database instance.

A connection to the target database instance is always required.

NO.36 Which two are true about Recovery Manager (RMAN) diagnostic message output? (Choose two.)

Media Management messages for SBT devices are always written to sbtio.log.

RMAN error stacks should be read from the bottom up as that is the order in which errors are generated.

RMAN error stacks should be read from the top down as that is the order in which errors are generated.

The RMAN LOG command line clause causes output issued during RMAN command compilation to be written to a log file and to standard output.

The RMAN LOG command line clause causes output issued during RMAN command compilation to be written to a log file only.

Media Management messages for SBT devices are written to an Oracle trace file.

NO.37 Choose three. Which three are true about a whole database backup?

It can be created only by using RMAN.

It always includes all data files, the current control file, the server parameter file, and archived redo logs.

It can be consistent.

It is the only possible backup type for a database in NOARCHIVELOG mode.

It can consist of either backup sets or image copies. F) It can be inconsistent.

NO.38 Choose three. Which three are true about Oracle pluggable databases (PDBs)?

A PDB can be plugged into a CDB only if both are of the same Oracle Database release.

An unplugged PDB can be plugged into multiple CDBs simultaneously by sharing data files.

A PDB unplugged from a container database (CDB) can be plugged into a different CDB without altering any of its schemas.

A non-CDB can be converted into a PDB.

A PDB in a remote CDB can be accessed transparently thereby aggregating results from local and remote PDBs.

A PDB created from PDB$SEED must be set to READ WRITE after loading data.

A PDB created from PDB$SEED must be set to READ ONLY after loading data.

NO.39 Examine the command for creating pluggable database PDB2 in container database CDB2. Select three options, any one of which is required for it to execute successfully. (Choose three.)

Add the FILE_NAME_CONVERT clause to the statement and set the PDB_FILE_NAME_CONVERT parameter.

Add only the CREATE_FILE_DEST clause to the statement.

Set only the PDB_FILE_NAME_CONVERT parameter.

Set the PDB_FILE_NAME_CONVERT parameter and enable OMF.

Enable only OMF.

Add the FILE_NAME_CONVERT clause to the statement and enable Oracle Managed Files (OMF)

NO.40 Choose three. Which three are true about SGA memory management in a multitenant database?

SGA_MIN_SIZE cannot be set for a PDB.

Setting SHARED_POOL_SIZE for a PDB guarantees a minimum amount of Shared Pool memory for that PDB.

Setting SGA_TARGET for a PDB guarantees a minimum amount of SGA memory for that PDB.

The SHARED_POOL_SIZE setting for a PDB can be up to 80% of the SHARED_POOL_SIZE setting of the root container.

Setting DB_CACHE_SIZE for a PDB guarantees a minimum amount of Database Buffer Cache memory for that PDB.

The SGA_TARGET setting for a PDB cannot exceed 50% of the SGA_TARGET value of the root container.

NO.41 A database is configured in archivelog mode.
Full RMAN backups are taken daily and no backup to trace has been taken of the control file.
A media failure has occurred.
In which two scenarios are complete recovery possible?

after losing an archived log from before the most recent backup

after losing all copies of the control file

when any archived log from, before, or after the most recent backup is corrupt

after losing an archived log from after the most recent backup

after losing the system tablespace

NO.42 Which three are true about using Database Upgrade Assistant (DBUA) to upgrade a database? (Choose three.)

The Pre-Upgrade Information Tool script is executed by DBUA.

DBUA must be launched from the target Oracle Home.

All pluggable databases are automatically upgraded as part of a container database upgrade.

A whole database backup must exist before upgrade

The database must be opened in read-only mode.

Multiple databases with the same ORACLE_HOME can be upgraded simultaneously.

NO.43 Choose three. Which three are true about Data Pump in an Oracle multitenant environment?

It can be used to transport data from a non-CDB to a PDB.

It can be used to clone a CDB.

It can be used to transport data between PDBs.

It can be used to transport data from a PDB to a non-CDB.

It can be used to create a new PDB.

NO.44 You issued this command:
RMAN> BACKUP RECOVERY FILES;
Which two are true?

All non-Oracle files in the current FRAthat have not been backed up already, are backed up.

All Oracle recovery files in the current fast recovery area (FRA) are backed up.

All Oracle recovery files in the current FRA that have not been backed up already, are backed up.

All Oracle recovery files not in the current FRA that have not been backed up already, are backed up.

These backups can be written to disk or SBT.

NO.45 Your production database is running in archivelog mode. You use RMAN with a recovery catalog to back up your database to media and the database is uniquely identified in the recovery catalog. You want to create a test database from the production database and allow the production database to remain open during the duplicate process. You restore the database backups to a new host with the same directory structure as the production database and want to use the recovery catalog for future backups after the database is successfully restored to the new host. How would you achieve this?

by using the RMAN switch command to set the new location for the data files

by using the RMAN duplicate command with nofilenamecheck to recover the database to the new host

by using the RMAN duplicate command with dbid and set new name for tablespace to recover the database to the new host

by creating a new database in the new host, and then using the RMAN recover command

NO.46 Which two are true about reclaiming space used by Flashback logs in Oracle Database 19c and later releases? (Choose two.)

Space is always reclaimed automatically when the retention period for Flashback logs is lowered.

Space might be reclaimed proactively before space pressure occurs.

Space might be reclaimed automatically when the retention period for Flashback logs is lowered.

Space is only reclaimed when there is space pressure in the Fast Recovery Area. (FRA)

Space is always reclaimed proactively before space pressure occurs.

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Latest 1Z0-083 Actual Free Exam Questions Updated 279 Questions [Q28-Q46]

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