[多选]
You are managing an Oracle Database 11g database with ASM storage. The ASM disk group has the COMPATIBLE.ASM attribute set to 11.1.
Which statements are true regarding extent management and allocation units in the ASM disk group？（）

A . The au_size disk group attribute determines the size of allocation units in the disk group.
B . The allocation unit size may vary but the extent size is fixed.
C . The allocation unit size and extent size are fixed for all the disks in a disk group and cannot be changed.
D . Extent management is completely automated.

You are managing a database for which incremental backups can be very time consuming. In order to perform optimized incremental backups you enable the block change tracking feature.How would you instruct RMAN to use the block change tracking feature when performing incremental backups？（） You need to mention it with every BACKUP command.。 The block change tracking feature is used automatically by RMAN.。 You need to configure it using the CONFIGURE command.。 You need to set the necessary initialization parameters to direct RMAN to use the feature.。浇筑式沥青混凝土的造价组成中，比重较大的费用依次是（）。沥青材料费。人工费。粗集料材料费。机械费。 Which two elements of the Java Enterprise Application Archive are required?（） EJB Archive 。 Deployment Descriptor。 META-INF sub directory。 Resource Adapter archive。 Java library。 Examine the data from the EMP table: EMP_ID DEPT_ID COMMISSION 1 10 500 2 20 1000 3 10 4 10 600 5 30 800 6 30 200 7 10 8 20 300 The COMMISSION column shows the monthly commission earned by the employee. Which three tasks would require subqueries or joins in order to perform in a single step? （） Deleting the records of employees who do not earn commission.。 Increasing the commission of employee 3 by the average commission earned in department 20.。 Finding the number of employees who do NOT earn commission and are working for department 20.。 Inserting into the table a new employee 10 who works for department 20 and earns a commission that is equal to the commission earned by employee 3.。 Creating a table called COMMISSION that has the same structure and data as the columns EMP_ID and COMMISSIONS of the EMP table.。 Decreasing the commission by 150 for the employees who are working in department 30 and earning a commission of more then 800.。开孔刀的刀齿一般由（）个构成一组。 1。 3。 4。 5。

You are managing an Oracle Database 11g database with ASM storage. The ASM disk group has the COMPATIBLE.ASM attribute set to 11.1.
Which statements are true regarding extent management and allocation units in the ASM disk group？（）

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[多选] You are managing an Oracle Database 11g database with ASM storage. The ASM disk group has the COMPATIBLE.ASM attribute set to 11.1. Which statements are true regarding extent management and allocation units in the ASM disk group？（）

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[多选]
You are managing an Oracle Database 11g database with ASM storage. The ASM disk group has the COMPATIBLE.ASM attribute set to 11.1.
Which statements are true regarding extent management and allocation units in the ASM disk group？（）