052(二十二）

Posted 2020-07-05 充实自己

106、

106.In a new installation of Oracle Database 11g, you perform these activities: 
1. Organize software and data on different subdirectories to avoid poor performance. 
2. Use consistent naming conventions for database files. 
3. Separate administrative information pertaining to the database in different directories. 
Which option corresponds to the type of activities you performed? 
A. Oracle Managed Files 
B. Oracle Grid Architecture 
C. Optimal Flexible Architecture 
D. Oracle database architecture 
E. Automatic Storage Management 

Answer: C

最优灵活体系结构（Optimal Flexible Architecture，简称OFA）

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107、

107.You configured the Flash Recovery Area (FRA) for your database. The database instance is running 
in ARCHIVELOG mode. The default location for the archived redo log files is the Flash Recovery Area. 
Which two files are removed automatically if the space is required in the FRA as per the retention policy? 
(Choose two.) 
A. Flashback log files 
B. Backups that have become obsolete 
C. User managed backups of the data files and control files 
D. Archived redo log files that have multiple copies in a different archive location and not backed up

Answer: AB

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108、

108.All the database users are presently connected to the database instance and working. The HR user 
has opened three database sessions and executed the following command in one of his sessions:
SQL> UPDATE persons SET ccode=\'U031\' WHERE ccode=\'U029\'; 123 rows updated.
SQL> DELETE FROM persons WHERE exp=\'Y\';
3 rows deleted.
The SYS user opens a new session after HR executed the above commands. 
Which sessions can see the effect of the UPDATE and DELETE commands?
A. All sessions of the HR user only 
B. All sessions of the HR user and the SYS user 
C. The session of the HR user that executed the commands 
D. All the sessions for which the database users have access privilege to the PERSONS table

Answer: C

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109、View the Exhibit and examine the attributes of an undo tablespace. 

In an OLTP system, the user SCOTT has started a query on a large table in the peak transactional hour that performs bulk inserts. 
The query runs for more than 15 minutes and then SCOTT receives the following error: 
ORA-01555: snapshot too old 
What could be the reason for this error? 
A. The query is unable to get a read-consistent image. 
B. There is not enough space in Flash Recovery Area. 
C. There is not enough free space in the flashback archive. 
D. The query is unable to place data blocks in undo tablespace. 

Answer: A

oracle里对undo_retention默认时间是900秒

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110、

110.The user HR receives the following error while inserting data into the TTK table:
ERROR at line 1:
ORA-01653: unable to extend table HR.TTK by 128 in tablespace SMD Upon investigation, you find that
SMD is a small file tablespace.
Which three action would allow the user to insert data? (Choose three.)
A. Add a data file to the SMD tablespace. 
B. Add a data file to the temporary tablespace associated with the user HR. 
C. Resize the data file associated with the SMD tablespace to make it larger. 
D. Alter the data file associated with the SMD tablespace to grow automatically. 
E. Change the segment space management for the SMD tablespace to automatic.

Answer: ACD

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