An existing master-slave setup is currently using a delayed replication of one hour. The master has crashed and the slave must be "rolled forward" to provide all the latest data. The SHOW SLAVE STATUS indicates the following values: RELAY_LOG_FILE =hostname-relay-bin.00004 RELAY_LOG_POS = 1383 Which command set would make the slave current?（） Gtid_mode must be set to AUTO during point in time recoveries。 Mysqlbinlog ignores arguments to – exclude-gtids-it means ignore all events with GTIDs。 The server keeps track of which GTIDs have already been executed and skips those。 Enforce_gtid_consistency is set to ON。
In which scenario will you use the Flashback Transaction Query feature？（） when you want to restore an important table that is dropped from the Recycle Bin。 when you want to obtain the SQL statements to undo the deletion of some important records from a table by a transaction。 when you want to restore a dropped user’s schema。 when a row of a table is updated many times within a specific time period and you want all the versions of the row in the specified time period。
新建锅炉投入运行的必备条件包括（）、（）、（）。
Identify the persistent configuration setting for the target database that can be set for the backup by using RMAN.（） (Choose all that apply.) Backup retention policy。 Default backup device type。 Default destinations for backups。 Multiple backup device types for single backup。 Default section size for backu。
砂浆强度应以标准养护、龄期为（）的试块抗压强度实验结果为准。 21d。 24d。 28d。 30d。
Which two statements about bigfile tablespaces are true？ （）
