killtest 分享最新的11G OCA认证考试资料

11G OCA认证考试的科目是1z0-051和1z0-052两门， 这两门考试题库由killtest专业IT认证讲师及产品专家精心打造，包括了当前最新的全真的考试试题，全部附有正确答案。
同时免费提供下载11G OCA认证考试题库试用版本：（部分考题如下）
1. 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

2. Which two statements are true about the Automatic Workload Repository (AWR)? (Choose two.)
A.All AWR tables belong to the SYSTEM schema.
B.The AWR contains systemwide tracing and logging information.
C.The snapshots collected by the AWR are accessible through data dictionary views.
D.The snapshots collected by the AWR are used by self-tuning components in the database.
Answer: CD

3. While observing the index statistics, you find that an index is highly fragmented, thereby resulting in poor database performance. Which option would you use to reduce fragmentation without affecting the users who are currently using the index?
A.Validate the index structure using the ANALYZE...INDEX command.
B.Rebuild the index using the ALTER INDEX..REBUILD ONLINE command.
C.Change the block space utilization parameters using the ALTER INDEX command.
D.Deallocate the unused space in the index using the ALTER INDEX..DEALLOCATE UNUSED command.
Answer: B

4. Your test database is running in NOARCHIVELOG mode. Which statement is true regarding the type of backups that can be performed on the database?
A.You can perform online whole database backups.
B.You can perform offline whole database backups.
C.You cannot perform schema-level export/import operations.
D.You can perform the backup of only the SYSTEM tablespace when the database is open.
Answer: B

5. The database instance is currently using SPFILE. View the Exhibit and examine the error that you received while running the DB Structure Integrity check.
Given below are the steps to recover from the error in random order:
1: Shut down the instance, if not already done.
2: Copy one of the remaining control files to a new location.
3: Change the value of the CONTROL_FILES initialization parameter to correspond to the new location of the control files.
4: Start up the database instance to the NOMOUNT stage.
5: Recover the database to the point of failure of the control file.
6: Open the database.
Identify the correct sequence of steps?
A.1, 2, 4, 3, 5, 6
B.2, 4, 3, 5, 6; 1 not required
C.4, 5, 6, 2, 3; 1 not required
D.5, 2, 3, 4; 1 and 6 not required
Answer: A

6. Note the following points describing various utilities in Oracle Database 11g:
1: It enables the high-speed transfer of data from one database to another.
2: It provides a complete solution for the backup, restoration, and recovery needs of the entire database.
3: It enables the loading of data from an external file into an Oracle database.
4: It provides a tape backup management for the Oracle ecosystem.
Which point describes Oracle Secure Backup?
A.1
B.2
C.3
D.4
E.1, 2, and 4
F.1, 2, 3, and 4
Answer: D
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