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1z1-062 資格試験、1z1-062 無料ダウンロード

2017-05-18 17:42:12 | 日記

1z1-062 資格試験はOracleのひとつの認証試験でIT業界でとても歓迎があって、ますます多くの人が1z1-062 資格試験に申し込んですがその認証試験が簡単に合格できません。準備することが時間と労力がかかります。でも、JPexamは君の多くの貴重な時間とエネルギーを節約することを助けることができます。


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1z1-062試験番号:1z1-062問題集
試験科目:Oracle Database 12c: Installation and Administration
最近更新時間:2017-05-17
問題と解答:全248問 1z1-062 無料問題
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>> 1z1-062 無料問題


 

NO.1 Which three statements are true about Flashback Database?
A. Flashback logs are written sequentially, and are archived.
B. Flashback logs are used to restore to the blocks' before images, and then the redo data may be
used to roll forward
to the desired flashback time.
C. The Oracle database automatically creates, deletes, and resides flashback logs in the Fast Recovery
Area.
D. Flashback Database can recover a data file that was dropped during the span of time of the
flashback.
E. Flashback Database can recover a database to the state that it was in before a reset logs
operation.
F. Flashback Database uses a restored control file to recover a database.
Answer: B,C,F

1z1-062 問題集   1z1-062 リンクグローバル   
Explanation:
* Flashback Database uses its own logging mechanism, creating flashback logs and storing them in
the fast recovery
area (C). You can only use Flashback Database if flashback logs are available. To take advantage of
this feature, you
must set up your database in advance to create flashback logs.
* To enable Flashback Database, you configure a fast recovery area and set a flashback retention
target. This retention
target specifies how far back you can rewind a database with Flashback Database.
From that time onwards, at regular intervals, the database copies images of each altered block in
every data file into
the flashback logs. These block images can later be reused to reconstruct the data file contents for
any moment at
which logs were captured. (F)
Incorrect:
Not E: You cannot use Flashback Database alone to retrieve a dropped data file. If you flash back a
database to a time
when a dropped data file existed in the database, only the data file entry is added to the control file.
You can only
recover the dropped data file by using RMAN to fully restore and recover the data file.
References:

NO.2 Which three statements are true concerning the multitenant architecture?
A. PDBs share a common system tablespace.
B. Different PDBs can have different default block sizes.
C. Each pluggable database (PDB) has its own set of background processes.
D. Log switches occur only at the multitenant container database (CDB) level.
E. PDBs can share the sysaux tablespace.
F. Instance recovery is always performed at the CDB level.
G. A PDB can have a private temp tablespace.
Answer: D,F,G

1z1-062 基礎   
Explanation:
B:
* A PDB would have its SYSTEM, SYSAUX, TEMP tablespaces. It can also contains other user created
tablespaces in it.
* There is one default temporary tablespace for the entire CDB. However, you can create additional
temporary
tablespaces in individual PDBs.
D:
* There is a single redo log and a single control file for an entire CDB
* A log switch is the point at which the database stops writing to one redo log file and begins writing
to another.
Normally, a log switch occurs when the current redo log file is completely filled and writing must
continue to the next
redo log file.
G: instance recovery
The automatic application of redo log records to uncommitted data blocks when an database
instance is restarted
after a failure.
Incorrect:
Not A:
* There is one set of background processes shared by the root and all PDBs. -
* High consolidation density. The many pluggable databases in a single container database share its
memory and
background processes, letting you operate many more pluggable databases on a particular platform
than you can
single databases that use the old architecture.
Not C: There is a separate SYSAUX tablespace for the root and for each PDB.
Not F: There is a separate SYSTEM tablespace for the root and for each PDB. -

NO.3 Examine the following command;
ALTER SYSTEM SET enable_ddl_logging = TRUE;
Which statement is true?
A. All DDL commands are logged in XML format in the alert directory under the Automatic Diagnostic
Repository (ADR)
home.
B. All DDL commands are logged in a different log file that contains DDL statements and their
execution dates.
C. Only DDL commands that resulted in the creation of new segments are logged.
D. All DDL commands are logged in the alert log file.
E. Only the data definition language (DDL) commands that resulted in errors are logged in the alert
log file.
Answer: D

1z1-062 テキスト   
Explanation:
Once DDL logging is turned on, every DDL command will be logged in the alert log file and also the
log.xml file.
Note:
* By default Oracle database does not log any DDL operations performed by any user. The default
settings for auditing
only logs DML operations.
* Oracle 12c DDL Logging - ENABLE_DDL_LOGGING
The first method is by using the enabling a DDL logging feature built into the database. By default it is
turned off and
you can turn it on by setting the value of ENABLE_DDL_LOGGING initialization parameter to true.
* We can turn it on using the following command. The parameter is dynamic and you can turn it
on/off on the go.
SQL> alter system set ENABLE_DDL_LOGGING=true;
System altered.
Elapsed: 00:00:00.05
SQL>
Once it is turned on, every DDL command will be logged in the alert log file and also the log.xml file.

NO.4 You executed the following command to create a password file in the database server:
$ orapwd file = orapworcl entries = 5 ignorecase=N
Which statement describes the purpose of the above password file?
A. It is used by Oracle to authenticate users for remote database administrator
B. It records usernames and passwords of all users when they are added to OSDBA or OSOPER
operating groups
C. It records usernames and passwords of users when granted the DBA role
D. It contains usernames and passwords of users for whom auditing is enabled
Answer: A
Explanation:
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