[不定项选择题]应答器天线安装在（）。
A.车顶
B.车底
C.车载机柜内
D.电客车客室内
E.以上都对

[不定项选择题]车载应答器发射给地面固定应答器的能量信号是（）HZ。
A.27.059M
B.25.075M
C.27.095M
D.25.057M
E.以上都对

[不定项选择题]车载应答器设备的检修周期为（）。
A.每年
B.每季度
C.每半年
D.每月
E.以上都对

[不定项选择题]列车经过轨道固定应答器可以实现（）。
A.获取移动授权
B.列车速度调整
C.触发车门允许
D.列车定位功能
E.以上都对

[不定项选择题]五号线应答器的安装高度为（）。
A.150-240m±5mm
B.102mm—240mm
C.250mm-350mm
D.120mm—240mm
E.以上都对

[不定项选择题]辅助逆变器装在（ ）车上
A.TC1
B.TC2
C.MP1
D.MP2
E.M1和M2

[不定项选择题]信标/应答器纵向安装装置测量标准（）。
A.长边应与钢轨平行
B.长平面中心线应与线路中心线重合，左右允许偏差±5mm
C.短平面中心线应与线路垂直，允许偏差±5mm
D.顶面距钢轨顶面65mm-70mm
E.以上都对

[不定项选择题]五号线应答器天线的电缆弯曲半径不得小于（）。
A.120mm
B.150mm
C.165mm
D.175mm
E.以上都对

[不定项选择题]扩展供电箱不可能装在（ ）车上
A.TC1
B.TC2
C.MP1
D.MP2
E.M1或M2

[不定项选择题]Which statement describes the significance of the CHANGE FAILURE

Command in RMAN? (Choose all that apply.) choose two

A.

It is used to change failure priority only for HIGH or LOW priorities.

B.

It is used to execute the advised repair script.

C.

It is used to change failure priority only for the CRITICAL priority.

D.

It is used to explicitly close the open failures.

E. It is used to inform the database about the repair after the repair script
Executes.

[不定项选择题]The persistent configuration settings for RMAN have default for all

Parameters. 

Identify four RMAN commands that produce a multi-section Backup.

A.

BACKUP TABLESPACE SYSTEM SECTION SIZE 100M;

B.

BACKUP AS COPY TABLESPACE SYSTEM SECTION SIZE 100M;

C.

BACKUP ARCHIVELOG ALL SECTION SIZE 25M;

D.

BACKUP TABLESPACE "TEMP" SECTION SIZE 10M;

E. BACKUP TABLESPACE "UNDO" INCLUDE CURRENT CONTROLFILE SECTION
SIZE 100M;
F. BACKUP SPFILE SECTION SIZE 1M;
G. BACKUP INCREMENTAL LEVEL 0 TABLESPACE SYSAUX SECTION SIZE 100M;

[不定项选择题]凸轮分为（）。
A.盘形凸轮
B.平面凸轮
C.移动凸轮
D.靠模板
E.圆柱凸轮

[不定项选择题]choose one
You enable Flashback Data Archive for a table for which you
Want to track and save all transactions for four years. After some time, the
Requirement changes for keeping transactions from four to two years.
You execute the following command to change the requirement:
SQL> ALTER FLASHBACK ARCHIVE fdal MODIFY RETENTION 2 YEAR;
What is the outcome?
A. All historical data older than two years, if any, is purged from the flashback
Archive FDA1.
B. An error is returned because the retention period cannot be reduced.
C. All the flashback data archives are purged and the subsequently created
Flashback archives are maintained for two years.
D. All historical data older than two years, if any, is archived to flashback logs and
The flashback archive is set to new retention time.

[不定项选择题]You notice performance degradation in your production Oracle 12c

Database. You want to know what caused this performance difference.

Which method or feature should you use?

A.

Database Replay

B.

Automatic Database Diagnostic Monitor (ADDM) Compare Period report

C.

Active Session History (ASH) report

D.

SQL Performance Analyzer

[不定项选择题]You are administering a multitenant container database (COB) that

Contains two pluggable databases (PDBs), pdb1 and pdb2. You are

Connected to pdb2 as a common user with DBA privileges. The

Statistics_level parameter is PDB modifiable.

As the user sys, execute the following command on pdb2:

SQL> ALTER SYSTEM SET STATISTICS_LEVEL=ALL SID='*' SCOPE=SPFILE;

Which statement is true about the result of this command?

A.

The statistics_level parameter is set to all when any of the PDBs is reopened.

B.

The statistics_level parameter is set to all only for PDB2 when it is reopened.

C.

The statistics_level parameter is set to all when the root database is restarted.

D.

The statement is ignored because there is no SPFILE for a PDB.

[不定项选择题]Examine the command for creating pluggable database PDB2 in

Container database CDB2.

Select three options, any one of which is required for it to execute

Successfully. (Choose three.)

A. Add the FILE_NAME_CONVERT clause to the statement and set the
PDB_FILE_NAME_CONVERT
Parameter.
B. Add only the CREATE_FILE_DEST clause to the statement.
C. Set only the PDB_FILE_NAME_CONVERT parameter.
D. Set the PDB_FILE_NAME_CONVERT parameter and enable OMF.
E. Enable only OMF.
F. Add the FILE_NAME_CONVERT clause to the statement and enable Oracle
Managed Files (OMF)

[不定项选择题]In a recent Automatic Workload Repository (AWR) report for your

Database, you notice a high number of buffer busy waits. The database

Consists of locally managed tablespaces with free list managed segments.

On further investigation, you f ind that buffer busy waits is caused by

Contention on data blocks.

Which option would you consider first to decrease the wait event

Immediately?

A.

Decreasing PCTUSED

B.

Decreasing PCTFREE

C.

Increasing the number of DBWN process

D.

Using Automatic Segment Space Management (ASSM)

E. Increasing db_buffer_cache based on t he V$DB_CACHE_ADVICE
Recommendation

[不定项选择题]You must transport the UNIVERSITY tablespace from one database to

Another.

The UNIVERSITY tablespace is currently open read/write.

The source and destination platforms have different endian formats.

Examine this list of actions:

1-Make the UNIVERSITY tablespace read-only on the source system.

2-Export the UNIVERSITY tablespace metadata using EXPDP.

3-Convert the UNIVERSITY tablespace data files to the destination platform format using RMAN on the source system.

4-Copy the UNIVERSITY tablespace data files to the destination system.

5-Copy the Data Pump dump set to the destination system.

6-Convert the UNIVERSITY tablespace data files to the destination platform format using RMAN on the destination system.

7-Import the UNIVERSITY tablespace metadata using IMPDP.

8-Make the UNIVERSITY tablespace read/write on the destination system.

Which is the minimum number of actions required, in the correct order, to transport the UNIVERSITY tablespace?

A.

1, 2, 4, 5, 7, 8

B.

1, 2, 4, 6, 7, 8

C.

1, 2, 3, 4, 5, 7, 8

D.

1, 2, 3, 4, 5, 6, 7, 8

E. 2, 4, 5, 6, 7

[不定项选择题]After implementing full Oracle Data Redaction, you change the default

Value for the NUMBER data type as follows:

SQL> select number_value from REDACTION_VALUES_FOR_TYPE_FULL;

NUMBER_VALUE

------------

0

SQL> exec DBMS_REDACT.UPDATE_FULL_REDACTION_VALUES(-1);

SQL> select number_value from REDACTION_VALUES_FOR_TYPE_FULL;

NUMBER_VALUE

------------

-1

After changing the value, you notice that FULL redaction continues to redact

Numeric data with zero.（您注意到 FULL 编校继续以零编校数值数据）也就是

上面的修改还没有生效，该命令是把 number 的数据类型编辑以后默认值为－1）。

What must you do to activate the new default value for numeric full

Redaction?

A.

Re-enable redaction policies that use FULL data redaction.

B.

Re-create redaction policies that use FULL data redaction.

C.

Re-connect the sessions that access objects with redaction policies defined on

Them.

D.

Flush t he shared pool.

E. Restart the database instance.

[不定项选择题]Examine the statements that use flashback technologies:

1-FLASHBACK TABLE customers TO TIMESTAMP TO_TIMESTAMP('2013-02-04 09:30:00', 'YYYY-MM-DD HH:MI:SS');

2-SELECT * FROM customers AS OF SCN 123456;

3-FLASHBACK TABLE customers TO BEFORE DROP;

4-FLASHBACK DATABASE TO TIMESTAMP TO_TIMESTAMP('2013-02-04 09:30:00', 'YYYY-MM-DD HH:MI:SS');

5-SELECT * FROM customers VERSIONS BETWEEN SCN 123456 AND 123999;

6-ALTER TABLE customers FLASHBACK ARCHIVE;

Which set of statements depends on the availability of relevant undo data in the Undo tablespace?

A.

1,3,6

B.

1,2,5

C.

3,4,5

D.

2,3,5,6