Which command will purge the err

Examine the output of the query that you executed to list the objects in the recycle bin:You verified that no table named SALES_TAB exists in the schema. Then you executed the following command to purge the objects in the recycle bin:SQL> PURGE TABLE sales_tab;What would be the outcome of this command?（）

A. All three tables in the recycle bin are purged

B. Only the table with the oldest DROPSCN is purged

C. The command returns an error because multiple entries with the same name exist in the recycle bin

D. Only the table with the latest DROPSCN is purged

A. The Work Item is not eligible for Purge.

B. The Work Item is eligible for a Permanent purge.

C. The Work Item is eligible for a Temporary purge.

D. The Work Item is not complete because it still has "Open" Notification.

E. The Work Item is eligible for both Temporary and Permanent purge.

● 在 ADO 对象中，（61）对象负责浏览和操作从数据库中取出的数据。

（61）A ．Connection B．Command C．RecordSet D．Err

A. The submit command exits the GUI.

B. The submit command reboots the WX device.

C. The submit command saves and writes the configuration to flash.

D. The submit command is the same as the commit CLI command.

A.EXECUTEDBMS_SCHEDULER.PURGE_LOG（log_history=>5，job_name=>’JOB1’）；

B.EXECUTEDBMS_SCHEDULER.PURGE_LOG（log_history=>5，job_name=>’JOB_LOG’）；

C.EXECUTEDBMS_SCHEDULER.PURGE_LOG（log_history=>5，which_log=>’JOB1’）；

D.EXECUTEDBMS_SCHEDULER.PURGE_LOG（log_history=>5，which_log=>’JOB_LOG’）；

A.Use the command PURGE BINARY LOGS and specify a binary log file name or a date and time to remove unused files

B.Execute the PURGE BINARY LOGE NOT USED command

C.Remove all of the binary log files that have a modification date earlier than today

D.Edit the .index file to remove the files you want to delete

E.Ensure that none of the attached slaves are using any of the binary logs you want to delete

当函数deferDemo返回失败时，并不能destroy已create成功的资源()

func deferDemo() error {err := createResource1()if err != nil { return ERR_CREATE_RESOURCE1_FAILED}defer func() { if err != nil { destroyResource1() }}()err = createResource2()if err != nil { return ERR_CREATE_RESOURCE2_FAILED}defer func() { if err != nil { destroyResource2() }}()err = createResource3()if err != nil { return ERR_CREATE_RESOURCE3_FAILED}return nil }

此题为判断题(对，错)。