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[Apr 10, 2025] Valid 1Z0-083 Test Answers & 1Z0-083 Exam PDF

Valid Oracle Database 19c 1Z0-083 Dumps Ensure Your Passing

问题 117
Choose three. You must migrate a non-CDB Oracle 11g Database to a CDB without first performing an upgrade to the non-CDB. User-defined objects are stored in several tablespaces in the non-CDB. Which three methods can you use?

 Data Pump full database export and import

 cloning the non-CDB as a PDB

 replication using GoldenGate

 Data Pump transportable tablespaces

 Data Pump full transportable database

 the DBMS_PDB package

问题 118
检查此配置：
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.

问题 119
Your SALES_ROOTapplication container has two application PDBs.
The SALES_APPapplication has a common table, FIN.REVENUE, in the two PDBs.
Examine this query and its output:

哪两个是真的？(请选择两项）。

 The CONTAINERS clause cannot be used in queries on the REVENUE table.

 The REVENUE table must be a list-partitioned table.

 The MAPTABLE tables defines a logical partition key on a commonly used column for the REVENUE table.

 The MAPTABLE table is a metadata-linked table.

 A container map exists for the REVENUE table, but is not enabled.

 The REVENUE table partitions are not pruned across the PDBs automatically.

Tested in lab with exact same setting like in the output shown.
A). -> incorrect – The CONTAINERS clause can be used.
B). -> incorrect – It can be also a range based.
C). -> CORRECT – https://docs.oracle.com/en/database/oracle/oracle-database/19/multi/administering-application-containers-with-sql-plus.html#GUID-AAF93A02-7C70-4024-8758-E351C213543E
D). -> incorrect – Regular table
E). -> incorrect – shown in the output CONTAINER_MAP = YES
F). -> CORRECT – because CONTAINERS_DEFAULT is not enabled for the revenue table.

问题 120
Which two are true about creating pluggable databases (PDBs) using snapshots in Oracle 19c and later releases? (Choose two.)

 A PDB snapshot is always a full copy of the source PDB.

 A PDB snapshot is always a sparse copy of the source PDB.

 A snapshot copy PDB depends on a storage snapshot which can only be stored on specific file systems.

 A PDB snapshot depends on a storage snapshot which can be stored on any file system.

 A PDB snapshot depends on a storage snapshot which can only be stored on specific file systems.

 A snapshot copy PDB depends on a storage snapshot which can be stored on any file system.

 A snapshot copy PDB can be created from a stand-alone clone PDB.

G:
https://docs.oracle.com/en/database/oracle/oracle-database/18/multi/cloning-a-pdb.html#GUID- F26C8A55-2465-475A-905A-83BD2E68AE6E and then create a SNAPSHOT COPY PDB from the standalone PDB.
C:
Storage requirements depend on the setting of the CLONEDB initialization parameter:
CLONEDB=FALSE
The underlying file system for the source PDB files must support storage snapshots. Such file systems include Oracle Automatic Storage Management Cluster File System (Oracle ACFS) and Direct NFS Client storage. Oracle Exadata supports snapshot copy functionality on ASM configured with sparse ASM grid disks.
CLONEDB=TRUE
The underlying file system for the source PDB files can be any local file system, network file system (NFS), or clustered file system that has Direct NFS enabled and supports sparse files.
Most UNIX systems meet these requirements, including Oracle ACFS and ZFS. However, when CLONEDB=TRUE, the source PDB must remain in open read-only mode when clones exist.

问题 121
Which three are true about using Database Resource Manager in an Oracle multitenant environment?
(选择三个）。

 A PDB-level resource plan can limit session PGA memory.

 A CDB-level resource plan can limit PDB CPU utilization.

 A CDB-level resource plan can limit session CPU utilization.

 PDB-level resource plans can limit uncommitted UNDO per consumer group.

 A CDB-level resource plan can limit PDB UNDO use.

 A CDB-level resource plan is mandatory when using PDB-level resource plans.

问题 122
For which two requirements can you use the USER_TABLESPACEclause with the CREATE PLUGGABLE DATABASEcommand? (Choose two.)

 to specify a default tablespace in a PDB cloned from another PDB in the same CDB.

 to exclude all tablespaces except SYSTEM, SYSAUX, and TEMP when plugging in a PDB

 to include specific user tablespaces only when relocating a PDB

 to specify the list of user tablespaces to include when moving a non-CDB to a PDB

 to exclude a temp tablespace when plugging in a PDB

 to specify the list of tablespaces to include when creating a PDB from the CDB seed

A – False : When you create the PDB from the PDB seed or an application seed and specify the DEFAULT TABLESPACE clause, Oracle Database creates a smallfile tablespace and sets it as the default tablespace for the PDB.
B, E – False : Specify ALL EXCEPT to include all tablespaces, except for the tablespaces listed.
This clause does not apply to the SYSTEM, SYSAUX, or TEMP tablespaces. Do not include these tablespaces in a tablespace list for this clause.
C – False : This clause can be used to specify user tablespaces when cloning, creating, or relocating a PDB D – True : For example, when you move a non-CDB to a PDB, and the non-CDB had several schemas that each supported a different application, you can use this clause to separate the data belonging to each schema into a separate PDB. This technique assumes that each schema used a separate tablespace in the non-CDB.
F – True : The USER_TABLESPACES clause of the CREATE PLUGGABLE DATABASE statement specifies which tablespaces are available in the new PDB. List one or more tablespaces to include.

问题 123
Which two are true about RMAN backups when using a media manager to write backups to tape when there are only two tape drives?

 SBT tape compression can be used even if no RMAN compression is configured.

 Any backup set written to the SBT device in this configuration can contain a maximum of two backup pieces.

 Any backup written to the SBT device in this configuration can contain a maximum of two backup sets.

 SBT tape compression and RMAN backup compression should be used in parallel.

 The SBT device should be configured to use parallelism 2 to allow both tape drives to be used simultaneously

问题 124
Choose three. Which three are true about a container database (CDB)?

 It can be created from a non-CDB.

 It can contain only one PDB$SEED, which is created when the CDB is created.

 It can have local users with the same name in different PDBs.

 It can contain only one Application Container seed, which is created when the Application Container is created.

 It can be created by cloning an existing CDB.

 It can have any number of pluggable databases (PDBs) limited only by space availability.

 It contains predefined common roles in both the root and the seed.

问题 125
How do you configure a CDB for local undo mode?

 Open the CDB instance in upgrade mode. In CDB$ROOT, execute ALTER DATABASE LOCAL UNDO ON, and then restart the CDB instance.

 Open the CDB instance in restricted mode. In CDB$ROOT, execute ALTER DATABASE LOCAL UNDO ON, and create an UNDO tablespace in each PDB, then restart the CDB instance.

 Open the CDB instance in restricted mode. In CDB$ROOT, drop the UNDO tablespace. Execute ALTER DATABASE LOCAL UNDO ON in each PDB, and then restart the CDB instance.

 Open the CDB instance in read-only mode. In CDB$ROOT, execute ALTER DATABASE LOCAL UNDO ON, and then change the CDB to read/write mode.

 Open the CDB instance in upgrade mode. In each PDB, execute ALTER DATABASE LOCAL UNDO ON, create an UNDO tablespace, and then restart the CDB instance.

问题 126
Which two are true about Oracle Optimizer Statistics, their use, and their collection? (Choose two.)

 The number of table rows is considered when evaluating the cost of accessing a table using an index.

 Index balanced B*Tree height is considered when evaluating the cost of using an index.

 The Statistics Advisor can help recommend the best way to gather statistics.

 Statistics collected using DBMS_STATS always yield the best optimizer result.

 The Statistics Advisor generates actions for all recommendations.

问题 127
备份到 Oracle 快速恢复区域 (FRA) 时，您发现备份时间过长，怀疑是性能瓶颈造成的。
关于诊断和调整这些问题，哪两个是正确的？

 如果 rman 备份验证命令所需的时间与实际备份所需的时间大致相同，那么读取和写入 I/O 都可能是瓶颈。

 如果 rman 备份验证命令所需的时间明显少于实际备份，那么写 I/O 很可能是瓶颈所在。

 使用同步 I/O 时，v$backup_sync_io.discrete_bytes_per_second 值较高的数据文件可能会成为性能瓶颈。

 如果 rman 备份验证命令与实际备份所需的时间大致相同，那么读取 I/O 很可能是瓶颈所在。

 使用异步 I/O 时，v$backup_async_io.short_waitits 值较高的数据文件可能会成为性能瓶颈。

问题 128
Which four are true about RMAN backup sets? (Choose four.)

 A backup piece can belong to only one backup set.

 A data file can be split into multiple sections stored in different backup sets.

 A data file canbe split into multiple sections stored in different backup pieces in the same backup set.

 Blocks from multiple data files can be contained in one backup piece,

 A backup set can contain only one backup piece.

 A backup set must be written to media.

 A backup set must be written to disk.

 Blocks from multiple data files can be contained in one backup set,

问题 129
Which three are true about Automatic Workload Repository (AWR)? (Choose three.)

 By default, AWR snapshots are taken every 60 minutes.

 Its collection level is determined by the value of the STATISTICS_LEVEL database parameter.

 By default, AWR snapshots are retained for 7 days.

 The taking of AWR snapshots can be disabled.

 AWR data is stored in the SYSTEM tablespace.

参考资料
https://docs.oracle.com/cd/B28359_01/server.111/b28320/initparams240.htm#REFRN10214

问题 130
Which two are true about RMAN encryption?

 Password encryption can be persistently configured using the configure encryption command.

 Dual-mode encrypted backups can be restored only if both the password and the keystore used for encryption are available.

 RMAN encryption keys are stored in a database keystore.

 RMAN can encrypt the Oracle Database password file.

 The set encryption command overrides encryption settings specified by the configure encryption command.

问题 131
PDB1 and PBD2 are pluggable databases in CDB1.
检查这些命令：

CDB1 is then restarted.
Which three are true? (Choose three.)

 PDB2 will be MOUNTED.

 PDB1 will be MOUNTED.

 PDB$SEED will be opened READ ONLY.

 PDB2 will be opened READ WRITE.

 PDB1 will be opened READ WRITE.

 PDB$SEED will be MOUNTED.

问题 132
检查输出结果：

哪两个是真的？

 Any PDB not specified in the plan will be unable to execute statements in parallel.

 PDB3 is guaranteed to receive at least 20% of the available system resources if there is enough demand.

 Any PDB not specified in the plan will be able to use a maximum of 16.5% of the available system resources.

 PDB3 can use all available parallel execution processes at times.

 PDB1 is always limited to 40% of the available system resources regardless of demand.

 PDB2 is guaranteed at least 25% of the available parallel execution processes if there is enough demand.

问题 133
A redaction policy was added to the SALcolumn of the SCOTT.EMPtable:

All users have their default set of system privileges.
For which three situations will data not be redacted? (Choose three.)

 SYS sessions, regardless of the roles that are set in the session

 SYSTEM sessions, regardless of the roles that are set in the session

 SCOTT sessions, only if the MGR role is set in the session

 SCOTT sessions, only if the MGR role is granted to SCOTT

 SCOTT sessions, because he is the owner of the table

 SYSTEM session, only if the MGR role is set in the session

问题 134
检查此配置：

To recover from this critical failure, you execute these commands:

What will be the outcome?

 选项

 选项

 选项

 选项

 选项

问题 135
检查此配置：
1.CDB1 是以 ARCHIVELOG 模式运行的容器数据库。
2.CDB1 中正在运行多个未提交的事务。
3.重做日志组 1 和 2 处于非活动状态。
4.重做日志组 3 是当前组。
重做日志组 3 的所有成员都会在归档前丢失。
检查这些可能的步骤：
1.关闭中止
2.启动名义账户
3.启动安装
4.更改数据库挂载
5.恢复数据库
6.恢复数据库
7.恢复数据库直至可用
8.恢复所有存档日志
9.alter databse open
10.alter database opeb resetlogs
按照正确的顺序选择恢复数据库所需的最少步骤。

 1, 3, 5, 8, 6, 10

 1, 3, 5, 6, 10

 1, 3, 5, 7, 10

 1, 2, 5, 7, 4, 10

 1, 3, 5, 6, 9

问题 136
Which two are true about Oracle Optimizer Statistics, their use, and their collection? (Choose two.)

 The number of table rows is considered when evaluating the cost of accessing a table using an index.

 Index balanced B*Tree height is considered when evaluating the cost of using an index.

 The Statistics Advisor can help recommend the best way to gather statistics.

 Statistics collected using DBMS_STATS always yield the best optimizer result.

 The Statistics Advisor generates actions for all recommendations.

Explanation/Reference: https://docs.oracle.com/en/database/oracle/oracle-database/19/tgsql/optimizer-statistics- advisor.html#GUID-D81A7708-FDA0-45BB-A6E2-103858B047AE

问题 137
Which two are true about changing the LOCAL_UNDO_ENABLED property to false in a CDB?
(选择两个）。

 更改后，只有具有所需权限的普通用户才能在 CDB&ROOT 中创建撤销表空间。

 任何新 PDB 和现有 PDB 都会自动配置为使用 CDB$ROOT 中的默认撤消表空间。

 更改后，CDB$ROOT 中只能存在一个撤销表空间。

 更改后，任何拥有所需权限的用户都可以在 PDB 中创建撤销表空间。

 必须在更改前删除 PDB 中现有的撤销表空间。

 更改后，必须重新打开每个现有的 PDB 才能使新的撤销模式生效。

A is correct, in shared UNDO mode, UNDO can exist in the CDB only.
B is wrong, because PDBs must be reopened to recognize the central UNDO C is wrong, because as the database is RAC and enabled with LOCAL UNDO, you need to assign specific Undo tablespace to each PDB on node-1 & node-2 by executing below commands.
On node-1:
alter system set undo_tablespace=UNDOTBS1 container=current sid=’DBCDB1′ scope=spfile; >>>> sid=First Instance On Node-2 alter system set undo_tablespace=UNDOTBS2 container=current sid=’DBCDB2′ scope=spfile; >>>> sid=Second Instance D is wrong, becuase as long as LOCAL UNDO used you cant create UNDO in PDB E is wrong, PDB UNDO tablespaces should be dropped after the change.
F is correct, when you change the undo mode of a CDB, the new undo mode applies to an individual container the first time the container is opened after the change.

问题 138
Which three are true about Recovery Manager (RMAN) in Oracle Database 19c and later releases? (Choose three.)

 It is only possible for RMAN to connect to a pluggable database as a target if an RMAN Virtual Private Catalog is used.

 It is always possible for RMAN to connect to a pluggable database as a target if any RMAN Catalog is used.

 A Virtual Private Catalog used to register a container database must be created in a pluggable database.

 A Virtual Private Catalog used to register a container database can be created in a pluggable database.

 It is always possible for RMAN to connect to a pluggable database as a target.

 A Virtual Private Catalog used to register a container database can be created in a non-container database.

问题 139
Oracle Managed Files (OMF) is enabled in a CDB and this command is successfully executed:

哪三个是真的？

 APP1 can never be unplugged.

 Application PDBs that are subsequently created in the APP1 application container will be cloned from APP1$SEED.

 An application seed PDB Is created for APP1.

 Application PDBs that are subsequently created in the APP1 application container will be cloned from PDB$SEED.

 An application root PDB is created for APP1.

 A default service Is created for the application root APP1.

问题 140
Examine this configuration: 1. CDB1 is an Oracle Database 12c Release 2 database containing pluggable databases PDB$SEED, PDB1, and PDB2. 2. PDB$SEED is open READ ONLY 3. PDB1 is open READ WRITE 4. PDB2 is MOUNTED. 5. ORACLE_HOME is /u01/app/oracle/product/18.1.0/dbhome_1. You execute these commands before upgrading the database to the current release: For which databases will fixup scripts be created?

 CDB1, PDB$SEED, PDB1, and PDB2

 PDB$SEED, PDB1, and PDB2 only

 CDB1 and PDB$SEED only

 CDB1, PDB1, and PDB2 only

 CDB1, PDB$SEED, and PDB1 only

问题 141
T schema owned by the RC12C user. The RCAT11 database contains an Oracle Database version 11g catalog schema owned by the RC11 user in which several databases are registered. Both the databases are open. You execute the RMAN commands: RMAN> CONNECT CATALOG rcl2c/passl2c@catdbl2c RMAN> IMPORT CATALOG rcll/pwdcatll@ractll Which two tasks are performed as part of the import?

 Databases from the RC12C catalog are implicitly unregistered if the RC11 catalog has registered databases with same name.

 Recovery catalog is resynchronized with the control files of the registered databases.

 Imported databases are unregistered from the RC11 catalog.

 Local and global stored scripts that have the same name as existing scripts in the RC12C catalog are automatically renamed.

 All databases registered in the RC11 catalog are registered in the RC12C catalog.

 加载中 …

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