单选题Flashback is enabled for your multitenant container database (CDB), which contains two pluggable database (PDBs). A local user was accidently dropped from one of the PDBs. You want to flash back the PDB to the time before the local user was dropped. Yo

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Which three statements are true about using flashback database in a multitenant container database(CDB)?（）

• A、The root container can be flashed back without flashing back the pluggable databases (PDBs).
• B、To enable flashback database, the CDB must be mounted.
• C、Individual PDBs can be flashed back without flashing back the entire cdb.
• D、The DB_FLASHBACK RETENTION_TARGET parameter must be set to enable flashback of the cdb.
• E、A CDB can be flashed back specifying the desired target point in time or an SCN, but not a restore point.

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Which two statements are true concerning the Resource Manager plans for individual pluggabledatabases (PDB plans) in a multitenant container database (CDB)?（）

• A、If no PDB plan is enabled for a pluggable database, then all sessions for that PDB are treated to an equal degree of the resource share of that pdb.
• B、In a PDB plan, subplans may be used with up to eight consumer groups.
• C、If a PDB plan is enabled for a pluggable database, then resources are allocated to consumer groups across all PDBs in the cdb.
• D、If no PDB plan is enabled for a pluggable database, then the PDB share in the CDB plan is dynamically calculated.
• E、If a PDB plan is enabled for a pluggable database, then resources are allocated to consumer groups based on the shares provided to the PDB in the CDB plan and the shares provided to the consumer groups in the PDB plan.

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Which three statements are true about the working of system privileges in a multitenant control database(CDB) that has pluggable databases (PDBs)?（）

• A、System privileges apply only to the PDB in which they are used.
• B、Local users cannot use local system privileges on the schema of a common user.
• C、The granter of system privileges must possess the set container privilege.
• D、Common users connected to a PDB can exercise privileges across other PDBs.
• E、System privileges with the with grant option container all clause must be granted to a common user before the common user can grant privileges to other users.

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Flashback is enabled for your multitenant container database (CDB), which contains two pluggable database (PDBs). A local user was accidently dropped from one of the PDBs. You want to flash back the PDB to the time before the local user was dropped. You connect to the CDB and execute the following commands: SQL > SHUTDOWN IMMEDIATE SQL > STARTUP MOUNT SQL > FLASHBACK DATABASE to TIME “TO_DATE (‘08/20/12’ , ‘MM/DD/YY’)”; Examine following commands: 1. ALTER PLUGGABLE DATABASE ALL OPEN; 2. ALTER DATABASE OPEN; 3. ALTER DATABASE OPEN RESETLOGS; Which command or commands should you execute next to allow updates to the flashback back schema?（）

• A、Only 1
• B、Only 2
• C、Only 3
• D、3 and 1
• E、1 and 2

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Which statement is true concerning dropping a pluggable database (PDB)?（）

• A、The PDB must be open in read-only mode.
• B、The PDB must be in mount state.
• C、The PDB must be unplugged.
• D、The PDB data files are always removed from disk.
• E、A dropped PDB can never be plugged back into a multitenant container database (CDB).

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Your multitenant container database (CDB) is running in ARCHIVELOG mode. You connect to the CDB RMAN. Examine the following command and its output: You execute the following command: RMAN > BACKUP DATABASE PLUS ARCHIVELOG; Which data files will be backed up?（）

• A、Data files that belong to only the root container
• B、Data files that belong to the root container and all the pluggable databases (PDBs)
• C、Data files that belong to only the root container and PDB$SEED
• D、Data files that belong to the root container and all the PDBs excluding PDB$SEED

第17题：

In your multitenant container database (CDB) containing pluggable database (PDBs), you granted theCREATE TABLE privilege to the common user C # # A_ADMIN in root and all PDBs. You execute thefollowing command from the root container:SQL > REVOKE create table FROM C # # A_ADMIN;What is the result?（）

• A、It executes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in root only.
• B、It fails and reports an error because the CONTAINER=ALL clause is not used.
• C、It excludes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in root and all PDBs.
• D、It fails and reports an error because the CONTAINER=CURRENT clause is not used.
• E、It executes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in all PDBs.

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In your multitenant container database (CDB) with two pluggable database (PDBs). You want to create a new PDB by using SQL Developer. Which statement is true?（）

• A、The CDB must be open.
• B、The CDB must be in the mount stage.
• C、The CDB must be in the nomount stage.
• D、Alt existing PDBs must be closed.

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