Flash back

Which one of the following statements about flashback is not true? You plan to execute the following command to perform a Flashback Database operation in your database: SQL> FLASHBACK DATABASE TO TIMESTAMP (SYSDATE -5/24); Which two statements are true about this?（） What are the prerequisites for performing flashback transactions? （）(Choose all that apply) Which two statements regarding the Flashback Table feature are correct?（） What two are the prerequisites for enabling Flashback Database?（） (Choose two) You want to flash back a test database by five hours.You issue this command:SQL > FLASHBACK DATABASE TO TIMESTAMP (SYSDATE - 5/24);Which two statements are true about this flashback scenario?（） What does the DB_FLASHBACK_RETENTION_TARGET parameter configure?（） Which background process sequentially writes Flashback Database data from the flashback buffer to the Flashback Database logs？（） What is the result of executing a TRUNCATE TABLE command on a table that has Flashback Archivingenabled?（） Which two are the prerequisites to enable Flashback Data Archive?（） (Choose two.) On which two database objects can the VERSIONS clause of the Flashback Versions Query be used?（） Which are the two prerequisites before setting up Flashback Data Archive? （）(Choose two.) Which three statements are true about using flashback database in a multitenant container database(CDB)?（） Which are the two prerequisites before setting up Flashback Data Archive? （）(Choose two.) You executed the following query in your database： SELECT oldest_flashback_scn， oldest_flashback_time FROM V$FLASHBACK_DATABASE_LOG； What would you determine from the output？（） You are working in an online transaction processing (OLTP) environment. You use the FLASHBACKTABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the system change number (SCN) was 663571. After flashing back the CUSTOMERS table, you realize that the table is not in the correct state. Now, you need to reverse the effects of the FLASHBACK TABLE command. Which is the fastest and the most efficient option to reverse the effects of the FLASHBACK TABLE command?（） You are working in an online transaction processing (OLTP) environment. You use the FLASHBACKTABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the system change number (SCN) was 663571. After flashing back the CUSTOMERS table, you realize that the table is not in the correct state. Now, you need to reverse the effects of the FLASHBACK TABLE command. Which is the fastest and the most efficient option to reverse the effects of the FLASHBACK TABLE command?（） You executed the following query in your database： SELECT oldest_flashback_scn， oldest_flashback_time FROM V$FLASHBACK_DATABASE_LOG； What would you determine from the output？（） Where does flashback often appear?: In a narrative.|In an academic paper.|In an argumentation.|In an exposition. For which two database objects can the VERSIONS clause of the Flashback Versions Query be used?（）(Choose two.)