On the 10th of August, you implement an incremental database backup strategy and configure a recovery window of five days.
Level 0 backups are taken on the 10th, 17th, and 24th of August. Differential level 1 incremental backups are taken daily between the level 0 backups.
Today is the 26th of August.
Which backups will be obsolete?

• A.all backups prior to 10th of August
• B.all backups prior to 24th of August
• C.all backups prior to 20th of August
• D.all backups prior to 17th of August
• E.all backups prior to 22nd of August

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

• A.A snapshot copy PDB depends on a storage snapshot which can be stored on any file system
• B.A snapshot copy PDB can be created from a stand-alone clone PDB
• C.A PDB snapshot is always a sparse copy of the source PDB
• D.A PDB snapshot is always a full copy of the source PDB
• E.A PDB snapshot depends on a storage snapshot which can be stored on any file system
• F.A PDB snapshot depends on a storage snapshot which can only be stored on specific file systems
• G.A snapshot copy PDB depends on a storage snapshot which can only be stored on specific file systems

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Which three are true about interpreting Recovery Manager (RMAN) error stacks returned to standard output?
(Choose three.)

• A.Media Management errors appear as a line with "sbtio" and a number.
• B.Media Management errors appear as a line with "Additional information" and a number.
• C.Media Management errors appear as a line with "sbtio".
• D.If an RMAN command fails, the output will identify the channel ID where the failure occurred.
• E.Some messages in the error stack are not errors.
• F.If an RMAN command fails, the output will only identify the command that failed.

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In performance management, which two factors might reduce the ability of an application to scale to a large number of users? (Choose two.)

• A.issuing multiple savepoints during a transaction
• B.the number of tablespaces containing tables updated by a transaction
• C.poorly written SQL
• D.poorly trained users who do not commit transactions
• E.the number of data files containing extents belonging to tables updated by a transaction

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You create a table with the PERIOD FOR clause to enable the use of the Temporal Validity feature of Oracle Database 12c. Examine the table definition: create table employees (empno number, salary number, deptid number, name varchar2(100), period for employee_time); Which three statements are true concerning the use of the Valid Time Temporal feature for the EMPLOYEES table?

• A.Thesamestatementmayfilteronbothtransactiontimeandvalidtemporaltimebyusingthe AS OF TIMESTAMP and PERIOD FOR clauses.
• B.The valid time columns are visible by default when the table is described.
• C.The valid time columns employee_time_start and employee_time_end are automatically created.
• D.The valid time columns are not populated by the Oracle Server automatically.
• E.Setting the session valid time using DBMS_FLASHBACK_ARCHIVE.ENABLE_AT_VALID_TIME sets the visibility for data manipulation language (DML), data definition language (DDL), and queries performed by the session.

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