优化Oracle 1Z0-053 V13.02 PDF应用部署与SQL计划管理

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Oracle 1Z0-053 V13.02 PDF 是一份针对Oracle Database 11g Administration II的考试资料，主要考察数据库管理和优化的相关知识。在这份资料中，我们看到两个关键知识点： 1. **SQL Plan Baselines的使用**：在部署新应用模块时，软件供应商会提供相应的SQL计划基线，以便新引入的SQL语句能快速利用已知性能良好的计划。这表明： - **A. Plan Baselines可以随时间演化**：随着时间的推移，通过持续监控和调整，计划基线可以不断优化性能。 - **C. 新SQL语句使用已知的高性能计划**：在初始阶段，新SQL会使用已知表现出色的计划，而不是直接导入计划基线，以确保性能稳定。 2. **Moving Window Baseline的调整**：当计划增大默认的系统定义移动窗口（Moving Window）大小，以便使用适应性阈值时，考虑的因素包括： - **没有提及A. AWR收集级别**：收集级别在这里不是决定因素，通常选择适合的收集级别与优化需求有关。 - **B. Moving Window大小应小于Undo Retention**：这是一个合理建议，因为移动窗口大小不应超过undo段的保留时间，以避免不必要的资源消耗。 - **C. Moving Window大小应足够大**：考虑到适应性阈值，窗口大小的确需要足够大以涵盖更多的数据，但具体大小取决于业务需求和数据库资源。总结来说，Oracle 1Z0-053 V13.02 PDF 主要关注SQL计划管理、性能优化和窗口大小设置的策略，这些是Oracle数据库管理员必备的技能，能够帮助确保系统的高效运行和稳定性。考生需要理解并掌握这些概念，以便在实际环境中进行有效的数据库管理。

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C. Set the DB_LOCK_CHECKSUM parameter to TYPICAL.

D. Set the DB_LOST_WRITE_PROTECT parameter to TYPICAL.

Answer: B

53.You want to use RMAN to create compressed backups.

Which statement is true about the compression algorithms that RMAN can use?

A. The BZIP2 compression algorithm consumes more CPU resources than the ZLIB compression

algorithm.

B. The ZLIB compression algorithm consumes more CPU resources than the BZIP2 compression

algorithm.

C. The ZLIB compression algorithm provides maximum compression and produces smaller backups than

the BZIP2 compression algorithm.

D. Only the BZIP2 compression algorithm can be used to make compressed backups to disk.

Answer: A

54.Evaluate the following function code:

CREATE FUNCTION get_dept_avg(dept_id NUMBER) RETURN NUMBER RESULT_CACHE

RELIES_ON

(EMPLOYEES) IS avgsal NUMBER(6);

BEGIN

SELECT AVG(SALARY)INTO avgsal

FROM EMPLOYEES

WHERE DEPARTMENT_ID = dept_id;

RETURN avgsal;

END get_dept_avg;

Which statement is true regarding the above function?

A. The cached result becomes invalid when any structural change is done to the EMPLOYEES table.

B. If the function execution results in an unhandled exception, the exception result is also stored in the

cache.

C. Each time the function is invoked in a different session, the current result in the result cache gets

overwritten.

D. If the function is invoked with a different parameter value, the existing result in the result cache gets

overwritten by the latest value.

Answer: A

55.Following is the list of locations in random order where oranfstab can be placed.

1./etc/mtab

2.$ORACLE_HOME/dbs/oranfstab

3./etc/oranfstab

What is the sequence in which Direct NFS will search the locations?

A. 1, 2, 3

B. 3, 2, 1

C. 2, 3, 1

D. 1, 3, 2

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Answer: C

56.You discover that your Recycle Bin contains two tables with the same name, MY_TABLE. You also

have a table named MY_TABLE in your schema. You execute the following statement:

FLASHBACK TABLE my_table TO BEFORE DROP RENAME TO my_table2;

What will be the result of executing this statement?

A. One of the tables is recovered from the Recycle Bin using a First In First Out (FIFO) approach.

B. One of the tables is recovered from the Recycle Bin using a Last In First Out (LIFO) approach.

C. Both the tables are recovered from the Recycle Bin with one table renamed to MY_TABLE2 and the

other to a system-generated name.

D. None of the tables are recovered from the Recycle Bin, and the statement returns an error.

Answer: B

57.Which background process of a database instance, using Automatic Storage Management (ASM),

connects as a foreground process into the ASM instance?

A. ASMB

B. PMON

C. RBAL

D. SMON

Answer: A

58.Which statement is true when Automatic Workload Repository (AWR) baselines are created using

baseline templates?

A. AWR baselines are always created as repeating baselines.

B. AWR baselines can be created on the basis of two time values.

C. AWR baselines are always created with infinite expiration duration.

D. AWR baselines are always created using the Automatic Workload Repository (AWR) retention period

as expiration duration.

Answer: B

59.You have not configured Oracle Managed Files (OMF) in your database. You do not want to scan the

entire datafile every time an incremental backup is performed. You decide to enable the block change

tracking feature. Which statement should you use to enable the block change tracking feature?

A. ALTER DATABASE ENABLE BLOCK CHANGE TRACKING;

B. ALTER SYSTEM ENABLE BLOCK CHANGE TRACKING USING FILE <path>;

C. ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE <path>;

D. ALTER SYSTEM ENABLE BLOCK CHANGE TRACKING;

Answer: C

60.For which two situations would you use functionality provided by the Resource Manager? (Choose

two.)

A. setting idle timeout limits on resource plans

B. saving storage space by using compressed backup sets

C. creating jobs that will run automatically at a scheduled time

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D. assigning priorities to jobs to manage access to system resources

E. creating alerts to perform notification when tablespaces are low on available space resources

Answer: AD

61.Which of the following advisors within the Oracle advisory framework will analyze a single SQL

statement and make recommendations for performance improvement?

A. SQL Repair Advisor

B. SQL Optimizer

C. SQL Access Advisor

D. SQL Tuning Advisor

Answer: D

62.You want to convert your existing non-ASM files to ASM files for the database PROD. Which method

or command would you use to accomplish this task?

A. Data Pump Export and Import

B. conventional export and import

C. the CONVERT command of RMAN

D. the BACKUP AS COPY. command of RMAN

Answer: D

63.Which method would you use to undo the changes made by a particular transaction without affecting

the changes made by other transactions?

A. point-in-time recovery

B. execute the ROLLBACK command with transaction number

C. flashback the database to before the transaction was committed

D. determine all the necessary undo SQL statements from FLASHBACK_TRANSACTION_QUERY and

use them for recovery

Answer: D

64.You performed an incomplete recovery and opened the database with the RESETLOGS option. The

LOG_ARCHIVE_FORMAT parameter is set to 'ora_%t_%s_%r.log'. Which statement regarding the

archived redo log files, created in an earlier incarnation of the database, is true?

A. The archived redo log files will be overwritten.

B. The archived redo log files are deleted automatically.

C. The archived redo log files should be moved to some other location.

D. The archived redo log files are still maintained because the file names are unique.

Answer: D

65.An online tablespace, TEST_TBS, is full and you realize that no server-managed tablespace threshold

alerts were generated for the TEST_TBS tablespace. What could be the reason, if the TEST_TBS

tablespace does not include autoextensible data files?

A. TEST_TBS is a small file tablespace.

B. TEST_TBS is a bigfile tablespace (BFT).

C. TEST_TBS is the default temporary tablespace.

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70.You executed the following SQL statement to shrink the EMPLOYEES table segment stored in the

EXAMPLE tablespace:

ALTER TABLE employees SHRINK SPACE CASCADE;

Which statement is correct in this scenario?

A. The EMPLOYEES table will be changed to read-only mode during the shrink operation.

B. The indexes created on the EMPLOYEES table will need to be rebuilt after the shrink operation is over.

C. The shrink behavior will be cascaded to all dependent segments of the table that support a shrink

operation.

D. Data manipulation language (DML) operations will not be possible on the EMPLOYEES table during

the COMPACTION phase of the shrink operation.

Answer: C

71.The Automatic Database Diagnostic Monitor (ADDM) analysis runs every 60 minutes on your

database. Your database is facing a series of interrelated problems over a period of two hours. You need

to ensure that the ADDM analysis is run over a time span of two hours in future. What would you do?

A. Create two custom ADDM tasks.

B. Modify the AWR snapshot time interval to two hours.

C. Create a new scheduler window for a time period of two hours.

D. Modify the Automatic Workload Repository (AWR) snapshot retention period to two hours.

Answer: B

72.You have 100 segments in the USERS tablespace. You realize that the USERS tablespace is running

low on space.

You can use Segment Advisor to _____.

A. identify the segments that you should shrink

B. modify the storage parameters for the tablespace

C. automatically shrink the segments with unused space

D. check the alerts generated for the tablespace that is running low on space

Answer: A

73.You are using Recovery Manager (RMAN) to perform backups. In which three situations would you

perform a compressed backup? (Choose three.)

A. You are backing up to tape and your tape device performs its own compression.

B. You are making image copies, and you have not enabled tablespace compression.

C. You are using disk-based backups and disk space in your Flash Recovery Area, or other disk-based

backup destinations are limited.

D. You are performing your backups to some device over a network where reduced network bandwidth is

more important than CPU usage.

E. You are using some archival backup media, such as CD or DVD, where reducing backup sizes saves

media costs and archival storage.

Answer: CDE

74.Immediately after adding a new disk to or removing an existing disk from an ASM instance, you find

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