052(二十一）

Posted 2020-07-05 充实自己

101、

101.Which three statements are true about logical structures of the Oracle database? (Choose three.) 
A. Each segment contains one or more extents. 
B. Multiple tablespaces can share a single data file. 
C. A data block is the smallest unit of input/output (I/O) in data files. 
D. It is possible to have tablespaces of different block sizes in a database. 
E. Each data block in the database always corresponds to one operating system block. 

Answer: ACD

表空间、段、扩展、块
一个数据库中可以有不同块大小的表空间

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102、

102.You are managing an Oracle Database 11g database. You configured the database to run in ARCHIVELOG mode.
Which two statements are true in this scenario? (Choose two.)
A. You must shut down the database instance to perform the backups. 
B. You must configure the Flash Recovery Area (FRA) for the database. 
C. You can perform complete database backups without closing the database. 
D. All the previous closed database backups including control files become invalid afteryou configure the database to ARCHIVELOG mode. 

Answer: CD

归档模式下，热备份

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103、View the Exhibit to examine the output of the DBA_OUTSTANDING_ALERTS view. 

After 30 minutes, you executed the following command: 
SQL> SELECT reason,metric_value FROM dba_outstanding_alerts; 
REASON METRIC_VALUE 
-----------------------------------------  -----------
Tablespace [TEST] is [28 perce 28.125 nt] full 28.125 
What could be the reason for the elimination of the other rows in the output? 
A. An Automatic Workload Repository snapshot has been taken recently. 
B. The non-threshold-based alerts are transferred to DBA_ALERT_HISTORY. 
C. The threshold alerts conditions are cleared and the alerts are transferred to DBA_ALERT_HISTORY. 
D. The threshold alerts related to database metrics are permanently stored in DBA_ALERT_HISTORY but not the threshold alerts related to instance metrics. 

Answer: C

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104、

104.Which two statements are true regarding listeners? (Choose two.) 
A. Listeners use only the TCP/IP protocol. 
B. Multiple listener processes can run simultaneously on a host. 
C. Multiple database instances can be registered with a single listener. 
D. The listener-related errors can be traced only at the administrative level. 
E. Only one database instance can be registered with a single listener at any time.

Answer: BC 

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参考052(九）第42题

 

105、

105.You have two database servers SEMP and SACCT. The database in the SEMP server maintains the employee information and the database in the SACCT server maintains the accounts payable information.
The employees submit the expense reports to the accounts payable department. A user of the accounts payable database wants to extract the employee information from the database in the SEMP server for 
crossverification.
Which schema object enables the user to access the information from the remote database?
A. Cluster 
B. Database link 
C. Mapping table 
D. Materialized view

Answer: B

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