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[多选] Which two statements are true regarding Health Monitor checks in Oracle Database 11g?()  

A .  Health Monitor checks can be used to scan the contents of the redo log and archive logs for accessibility and corruption.
B .  Health Monitor checks can be used to verify the integrity of database files and report failures if these files are inaccessible,corrupt or inconsistent.
C .  Health Monitor checks can be used to verify the contents of dictionary entries for each dictionary object and fix it automatically.
D .  Health Monitor checks are always initiated manually when there is some critical error.

A team of programmers is involved in reviewing a proposed design for a new utility class. After some discussion, they realize that the current design allows other classes to access methods in the utility class that should be accessible only to methods within the utility class itself. What design issue has the team discovered?() Tight coupling。 Low cohesion。 High cohesion。 Loose coupling。 Weak encapsulatio。 水泥砂浆防水层的施工质量检验数量,应按施工面积每()抽查一处,每处10m2,且不得小于3处。 200m2。 100m2。 50m2。 20m2。 In the instance of the PROD database, the checkpoint (CKPT) process runs after every minute. A database user updates the rows of the ORDERS table. Because of the configuration, the CKPT process gets initiated before the user commits the transaction. What would happen to the modified blocks when the CKPT process is started?() The modified blocks would be written to the data files.。 The modified blocks would be written to the temp files.。 The modified blocks would be written to the control file.。 The modified blocks would be written to the redo log files.。 The modified blocks would be written to the archived redo log files.。 The modified blocks would be retained in the database buffer cache.。 You want to create a consumer group, GROUP1, and you execute the following command in the command-line interface:  SQL> EXEC DBMS_RESOURCE_MANAGER.CREATE_CONSUMER_GROUP (CONSUMER_GROUP =>’group1’,  COMMENT => ’New Group’);  This command errors out displaying the following message:  ERROR at line 1:  ORA-29371: pending area is not active  ORA-06512: at "SYS.DBMS_RMIN", line 115  ORA-06512: at "SYS.DBMS_RESOURCE_MANAGER", line 108  ORA-06512: at line 1  What action would you take to overcome this error?()  activate the Pending Area before creating the consumer group。  create the Pending Area before creating the consumer group。  increase the size of the database buffer cache to accommodate the Pending Area。  increase the size of the shared pool to accommodate the Pending Area。  increase the size of the large pool to accommodate the Pending Area。 电流互感器的不完全星形接线,在运行中() 不能反应所有的接地故障。 对相间故障反应不灵敏。 对反应单相接地故障灵敏。 Which two statements are true regarding Health Monitor checks in Oracle Database 11g?()  
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