[单选] In your Supportcenter.cn production database，you find that the database users are able to create and read files with unstructured data，available in any location on the host machine from an application. You want to restrict the database users to access files in a specific location on the host machine. What could do to achieve this？（）

A . Modify the value for the UTL_FILE_DIR parameter in the parameter file
B . Grant read and write privilege on the operating system path to the database users
C . Modify the value for the LDAP_DIRECTORY_ACCESS parameter in the parameter file
D . Modify the value for the PLSQL_NATIVE_LIBRARY_DIR parameter in the parameter file
E . Create a directory object referring to the operating system path， and grant read and write privilege on the directory object to the database user

Given two different character sets （A and B）， which of the following must be true for A to be considered a strict superset of B？（） A must contain all of the characters defined in B。 A must be Unicode。 The encoded values in A must match the encoded values in B for all characters defined in B 。 A must be a multibyte character set。 The encoded values in A must match the encoded values in B for all numeric and alphabetic character。补栽 You are working on an instance started using the SPFILE. You want to move the Flash Recovery Area of yourdatabase to a new location. You want the Flashback log files to be stored in the new location. Given below are the steps to accomplish the task in random order： 1.Shut down the instance. 2.Change the value of the DB_RECOVERY_FILE_DEST initialization parameter to a new value. 3.Execute the ALTER DATABASE FLASHBACK OFF command. 4.Start up the instance and mount the database. 5.Execute the ALTER DATABASE FLASHBACK ON command. 6.Open the database. Select the correct order in which these tasks need to be performed.（） 2，1，4，3，5，6。 1，4，3，2，6，5。 1，4，2，6，3，5。 3，2，1，4，5，6。 An employee cannot access the company database. You check the connection variables: What is a valid explanation for why one of the users is unable to connect to the database?（） Bob has max_user_connections set to zero, which blocks all his connections。 Joe has exceeded the max_user_connections global limit。 All users are blocked because max_user_connections is accumulated over the host account information。 Kay is already connected elsewhere and attempting to log in again。 Connect_timeout is too small to allow a connection to occur。儿童自主自发表现出的一种活动，其目的隐含于游戏活动本身的本体性游戏，也称之为（）目的性游戏。工具性游戏。结果性游戏。过程性游戏。 In your Supportcenter.cn production database，you find that the database users are able to create and read files with unstructured data，available in any location on the host machine from an application. You want to restrict the database users to access files in a specific location on the host machine. What could do to achieve this？（）

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