[单选]
You are administering a database and you receive a requirement to apply the following restrictions:
1. A connection must be terminated after four unsuccessful login attempts by user.
2. A user should not be able to create more than four simultaneous sessions.
3. User session must be terminated after 15 minutes of inactivity.
4. Users must be prompted to change their passwords every 15 days.
How would you accomplish these requirements?（）

A . by granting a secure application role to the users
B . by creating and assigning a profile to the users and setting the REMOTE_OS_AUTHENT parameter to false
C . By creating and assigning a profile to the users and setting the SEC_MAX_FAILED_LOGIN_ATTEMPTS parameter to 4
D . By Implementing Fine-Grained Auditing (FGA) and setting the REMOTE_LOGIN_PASSWORD_FILE parameter to none.
E . By implementing the database resource Manager plan and setting the SEC_MAX_FAILED_LOGIN_ATTEMPTS parameters to 4.

What are the three steps you should take to tune a JDBC Connection pool in WebLogic from the initial settings in a production environment?（） Ensure the maximum size is increased to an appropriate setting.。 Set the minimum and maximum size of the connection pool to the same value.。 Increase the statement cache size.。 Add more heap to the JVM.。 Add more nodes to the cluster.。直流电源线、交流电源线、信号线必须分开布放。应避免在同一线束内。电缆走线应将直流线、交流线与信号线分开布放，至少在（）mm以上 20。 30。 50。 100。 Which two statements are true about the Oracle Enterprise Manager （OEM）？（） OEM can do management and monitoring across multiple WLS Domains。 OE is a unified solution for management and monitoring across entire architecture - Web Tier， App Tier & DB Tier。 OEM is focused solely on Oracle solutions， cannot manage 3rd party products。 OEM includes tools to configure the operating system。 The EMP table exists in your schema. You want to execute the following query： SELECT ename， sal FROM emp AS OF TIMESTAMP （SYSTIMESTAMP - INTERVAL ’6’ MINUTE） WHERE ename = ’ALLEN’； What are the minimum requirements for the statement to execute successfully？（） ARCHIVELOG mode must be enabled。 Row Movement must be enabled for the table。 FLASHBACK must be set to ON for the database。 The UNDO_MANAGEMENT parameter must be set to AUTO。 The UNDO_RETENTION parameter must be set appropriately。（）是衡量建筑物是否稳定的重要依据，尤其对置于软基处理地基上的建筑物，沉降资料是判别软基处理效果、地基是否完成固结沉降的重要依据。水平位移资料。沉降资料。气压资料。正常蓄水位资料。

You are administering a database and you receive a requirement to apply the following restrictions:
1. A connection must be terminated after four unsuccessful login attempts by user.
2. A user should not be able to create more than four simultaneous sessions.
3. User session must be terminated after 15 minutes of inactivity.
4. Users must be prompted to change their passwords every 15 days.
How would you accomplish these requirements?（）

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