单选题 Choose the best answer. Examine this configuration: -1. CDB1 is a container database. 2. APP_ROOT is an application root in CDB1. 3. APP_PDB1 is an application PDB in APP_ROOT. 4. FLASHBACK DATABASE is ON. You execute these commands:$ sql plus sys/orac1e_4U@localhost:1521/cdb1SQL> SELECT current_scn FROM v$database; CURRENT_SCN 2074756SQL> CREATE TABLE cdb1_tab(c1 NUMBER) ;Table created. SQL> ALTER SESSION SET CONTAINER=app_root;Session altered. SQL> CREATE TABLE app_root_tab (c1 NUMBER) ;Table created. SQL> ALTER SESSION SET CONTAINER=app_pdb1;Session altered. SQL> CREATE TABLE app_pdb1_tab (c1 NUMBER) ;Table created. SQL> conn / as sysdba Connected. SQL> ALTER PLUGGABLE DATABASE app_root CLOSE;Pluggable database altered. SQL> FLASHBACK PLUGGABLE DATABASE app_root TO SCN 2074756; Flashback complete. Which table or set of tables will exist after the Flashback operation hascompleted?
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单选题 Examine the RMAN command:RMAN> CONFIGURE ENCRYPTION FOR DATABASE ON;RMAN> BACKUP DATABASE PLUS ARCHIVELOG;Which prerequisite must be met before accomplishing the backup?
单选题 Choose the best answer You want to create a duplicate database DUP_DB from your production database PROD on the same host. The PRODdatabase uses Automatic Storage Management (ASM) for storage. Regular backups are taken using RMAN connected to a recovery catalog. You create an auxiliary instance and want to execute the command:RMAN> DUPLICATE TARGET DATABASE TO dup_db FROM ACTIVE DATABASE;What is a prerequisite for the successful execution of this command
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单选题 choose one You enable Flashback Data Archive for a table for which youwant to track and save all transactions for four years. After some time, therequirement changes for keeping transactions from four to two years. You execute the following command to change the requirement:SQL> ALTER FLASHBACK ARCHIVE fdal MODIFY RETENTION 2 YEAR;What is the outcome?
单选题 Automatic Shared Memory Management is disabled for one of yourdatabase instances. Some SQL statements perform poorly due to excessivehard parse activity, thereby degrading performance. What would be yournext step?
单选题 Examine the statements that use flashback technologies: -1. FLASHBACK TABLE customers TO TIMESTAMP TO_TIMESTAMP('2013-02-04 09:30:00', 'YYYY-MM-DD HH:MI:SS'); -2. SELECT ∗ FROM customers AS OF SCN 123456; -3. FLASHBACK TABLE customers TO BEFORE DROP; -4. FLASHBACK DATABASE TO TIMESTAMP TO_TIMESTAMP('2013-02-0409:30:00', 'YYYY-MM-DD HH:MI:SS'); -5. SELECT ∗ FROM customers VERSIONS BETWEEN SCN 123456 AND 123999; -6. ALTER TABLE customers FLASHBACK ARCHIVE;Which set of statements depends on the availability of relevant undo data in theundo tablespace?
单选题 You plan to create a database by using the Database Configuration Assistant (DBCA), with the following specifications: Applications will connectto the database via a middle tier. The number of concurrent userconnections will be high. The database will have mixed workload, with theexecution of complex BI queries scheduled at night. Which DBCA option must you choose to create the database?
2024-11-21 
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