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Code d'Examen: 1Z0-804
Nom d'Examen: Oracle (Java SE 7 Programmer II Exam)
Questions et réponses: 150 Q&As
Code d'Examen: 1z0-061
Nom d'Examen: Oracle (Oracle Database 12c: SQL Fundamentals)
Questions et réponses: 75 Q&As
Code d'Examen: 1Z0-060
Nom d'Examen: Oracle (Upgrade to Oracle Database 12c)
Questions et réponses: 150 Q&As
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NO.1 Your multitenant container (CDB) contains two pluggable databases(PDB), HR_PDB and
ACCOUNTS_PDB, both of which use the CDB tablespace. The temp file is called temp01.tmp.
A user issues a query on a table on one of the PDBs and receives the following error:
ERROR at line 1:
ORA-01565: error in identifying file '/u01 /app/oracle/oradata/CDB1 /temp01.tmp'
ORA-27037: unable to obtain file status
Identify two ways to rectify the error.
A. Add a new temp file to the temporary tablespace and drop the temp file that that produced the
error.
B. Shut down the database instance, restore the temp01.tmp file from the backup, and then restart
the database.
C. Take the temporary tablespace offline, recover the missing temp file by applying redo logs, and
then bring the temporary tablespace online.
D. Shutdown the database instance, restore and recover the temp file from the backup, and then
open the database with RESETLOGS.
E. Shut down the database instance and then restart the CDB and PDBs.
Answer: C,E
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Explanation:
* Because temp files cannot be backed up and because no redo is ever generated for them, RMAN
never restores or recovers temp files. RMAN does track the names of temp files, but only so that it
can automatically re-create them when needed.
*If you use RMAN in a Data Guard environment, then RMAN transparently converts primary control
files to standby control files and vice versa. RMAN automatically updates file names for data files,
online redo logs, standby redo logs, and temp files when you issue RESTORE and RECOVER.
NO.2 Examine the followingcommands forredefininga table withVirtual Private Database(VPD)
policies:
Which two statements are true about redefining the table?
A. All the triggers for the table are disabled without changing any of the column names or column
types in the table.
B. The primary key constraint on the EMPLOYEES table is disabled during redefinition.
C. VPD policies are copied from the original table to the new table during online redefinition.
D. You must copy the VPD policies manually from the original table to the new table during online
redefinition.
Answer: B,C
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Explanation:
C (not D):CONS_VPD_AUTO Used to indicate to copy VPD policies automatically
*DBMS_RLS.ADD_POLICY /The DBMS_RLS package contains the fine-grained access control
administrative interface, which is used to implement Virtual Private Database (VPD).DBMS_RLS is
available with the Enterprise Edition only.
Note: *CONS_USE_PK and CONS_USE_ROWID are constants used as input to the "options_flag"
parameter in both the START_REDEF_TABLE Procedure and CAN_REDEF_TABLE Procedure.
CONS_USE_ROWID is used to indicate that the redefinition should be done using rowids while
CONS_USE_PK implies that the redefinition should be done using primary keys or pseudo-primary
keys (which are unique keys with all component columns having NOT NULL constraints).
*DBMS_REDEFINITION.START_REDEF_TABLE
To achieve online redefinition, incrementally maintainable local materialized views are used. These
logs keep track of the changes to the master tables and are used by the materialized views during
refresh synchronization.
*START_REDEF_TABLE Procedure Prior to calling this procedure, you must manually create an empty
interim table (in the same schema as the table to be redefined) with the desired attributes of the
post-redefinition table, and then call this procedure to initiate the redefinition.
NO.3 Open the database with RESETLOGS.
NO.4 Which Oracle Database component is audited by default if the unified Auditing option is
enabled?
A. Oracle Data Pump
B. Oracle Recovery Manager (RMAN)
C. Oracle Label Security
D. Oracle Database Vault
E. Oracle Real Application Security
Answer: E
certification Oracle certification 1Z0-060 certification 1Z0-060
Explanation:
Type ofUnifiedauditing:
Standard
Fine Grained Audit
XS
Database Vault(not D)
Label Security(not C)
RMAN AUDIT(not B)
Data Pump(not A)
Note:
*Oracle 12c introduces Unified Auditing, which consolidates database audit records
including :-
DDL, DML, DCL
Fine Grained Auditing (DBMS_FGA)
Oracle Database Real Application Security
Oracle Recovery Manager
Oracle Database Vault
Oracle Label Security
Oracle Data Mining
Oracle Data Pump
Oracle SQL*Loader Direct Load
NO.5 You are administering a database stored in Automatic Storage Management (ASM). You
use RMAN to back up the database and the MD_BACKUP command to back up the ASM metadata
regularly. You lost an ASM disk group DG1 due to hardware failure.
In which three ways can you re-create the lost disk group and restore the data?
A. Use the MD_RESTORE command to restore metadata for an existing disk group by passing the
existing disk group name as an input parameter and use RMAN to restore the data.
B. Use the MKDG command to restore the disk group with the same configuration as the backed-up
disk group and data on the disk group.
C. Use the MD_RESTORE command to restore the disk group with the changed disk group
specification, failure group specification, name, and other attributes and use RMAN to restore the
data.
D. Use the MKDG command to restore the disk group with the same configuration as the backed-up
disk group name and same set of disks and failure group configuration, and use RMAN to restore
the data.
E. Use the MD_RESTORE command to restore both the metadata and data for the failed disk group.
F. Use the MKDG command to add a new disk group DG1 with the same or different specifications
for failure group and other attributes and use RMAN to restore the data.
Answer: C,E,F
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Explanation:
Note:
*The md_restore command allows you to restore a disk group from the metadata created
by the md_backup command.
/md_restore Command
Purpose
This command restores a disk group backup using various options that are described in
this section.
/In the restore mode md_restore, it re-create the disk group based on the backup file with
all user-defined templates with the exact configuration as the backuped disk group. There
are several options when restore the disk group
full - re-create the disk group with the exact configuration
nodg - Restores metadata in an existing disk group provided as an input parameter
newdg - Change the configuration like failure group, disk group name, etc..
*The MD_BACKUP command creates a backup file containing metadata for one or more
disk groups. By default all the mounted disk groups are included in the backup file which is
saved in the current working directory. If the name of the backup file is not specified, ASM names
the file AMBR_BACKUP_INTERMEDIATE_FILE.
NO.6 Which three are true about the large poolfor anOracle database instance that supports
shared server connections?
A. Allocates memory for RMAN backup and restore operations
B. Allocates memory for shared and private SQL areas
C. Contains a cursor area for storing runtime information about cursors
D. Contains stack space
E. Contains a hash area performing hash joins of tables
Answer: A,B,C
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Explanation:
The large pool can provide large memory allocations for the following:
/(B)UGA(User Global Area)for the shared server and the Oracle XA interface (used where
transactions interact with multiple databases)
/Message buffers used in the parallel execution of statements
/(A)Buffers for Recovery Manager (RMAN) I/O slaves
Note:
*large pool
Optional area in the SGA that provides large memory allocations for backup and restore
operations, I/O server processes, and session memory for the shared server and Oracle
XA.
*Oracle XA
An external interface that allows global transactions to be coordinated by a transaction
manager other than Oracle Database.
*UGA
User global area. Session memory that stores session variables, such as logon
information, and can also contain the OLAP pool.
*Configuring the Large Pool
Unlike the shared pool, the large pool does not have an LRU list(not D). Oracle Database
does not attempt to age objects out of the large pool. Consider configuring a large pool if
the database instance uses any of the following Oracle Database features:
*Shared server
In a shared server architecture, the session memory for each client process is included in
the shared pool.
*Parallel query
Parallel query uses shared pool memory to cache parallel execution message buffers.
*Recovery Manager
Recovery Manager (RMAN) uses the shared pool to cache I/O buffers during backup and restore
operations. For I/O server processes, backup, and restore operations, Oracle Database allocates
buffers that are a few hundred kilobytes in size.
NO.7 Execute the command SHUTDOWN ABORT.
Which option identifies the correct sequence to recover the SYSAUX tablespace?
A. 6, 5, 4, 7
B. 10, 1, 2, 5, 8
C. 10, 1, 2, 5, 4, 9, 8
D. 10, 1, 5, 8, 10
Answer: C
Oracle 1Z0-060 certification 1Z0-060 certification 1Z0-060
Explanation:
* Example:
While evaluating the 12c beta3 I was not able to do the recover while testing "all pdb files
lost".
Cannot close the pdb as the system datafile was missing...
So only option to recover was:
Shutdown cdb(10)
startup mount;(1)
restore pluggable database
recover pluggable databsae
alter database open;
alter pluggable database name open;
Oracle support says: You should be able to close the pdb and restore/recover the system
tablespace of PDB.
*Open the database with the RESETLOGS option after finishing recovery: SQL> ALTER DATABASE
OPEN RESETLOGS;
9. Which three are direct benefits of the multiprocess, multithreaded architecture of Oracle
Database 12c when it is enabled?
A. Reduced logical I/O
B. Reduced virtual memory utilization
C. Improved parallel Execution performance
D. Improved Serial Execution performance
E. Reduced physical I/O
F. Reduced CPU utilization
Answer: C
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Explanation:
*Multiprocess and Multithreaded Oracle Database Systems
Multiprocess Oracle Database (also called multiuser Oracle Database) uses several processes to run
different parts of the Oracle Database code and additional Oracle processes for the users-either one
process for each connected user or one or more processes shared by multiple users. Most databases
are multiuser because a primary advantage of a database is managing data needed by multiple
users simultaneously.
Each process in a database instance performs a specific job. By dividing the work of the database
and applications into several processes, multiple users and applications can connect to an instance
simultaneously while the system gives good performance.
*In previous releases, Oracle processes did not run as threads on UNIX and Linux systems. Starting
in Oracle Database 12c, the multithreaded Oracle Database model enables Oracle processes to
execute as operating system threads in separate address spaces.
10. In order to exploit some new storage tiers that have been provisioned by a storage
administrator, the partitions of a large heap table must be moved to other tablespaces in your
Oracle 12c database?
Both local and global partitioned B-tree Indexes are defined on the table.
A high volume of transactions access the table during the day and a medium volume of transactions
access it at night and during weekends.
Minimal disrupt ion to availability is required.
Which three statements are true about this requirement?
A. The partitions can be moved online to new tablespaces.
B. Global indexes must be rebuilt manually after moving the partitions.
C. The partitions can be compressed in the same tablespaces.
D. The partitions can be compressed in the new tablespaces.
E. Local indexes must be rebuilt manually after moving the partitions.
Answer: A,B,D
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Explanation:
A:You can create and rebuild indexes online. Therefore, you can update base tables at the same
time you are building or rebuilding indexes on that table. You can perform DML operations while
the index build is taking place, but DDL operations are not allowed. Parallel execution is not
supported when creating or rebuilding an index online.
B: Note: *Transporting and Attaching Partitions for Data Warehousing Typical enterprise data
warehouses contain one or more large fact tables. These fact tables can be partitioned by date,
making the enterprise data warehouse a historical database. You can build indexes to speed up star
queries. Oracle recommends that you build local indexes for such historically partitioned tables to
avoid rebuilding global indexes every time you drop the oldest partition from the historical database.
D:Moving (Rebuilding) Index-Organized Tables Because index-organized tables are primarily stored
in a B-tree index, you can encounter fragmentation as a consequence of incremental updates.
However, you can use the ALTER TABLE...MOVE statement to rebuild the index and reduce this
fragmentation.
NO.8 Which two statements are true about the use of the procedures listed in the
v$sysaux_occupants.move_procedure column?
A. The procedure may be used for some components to relocate component data to the SYSAUX
tablespace from its current tablespace.
B. The procedure may be used for some components to relocate component data from the SYSAUX
tablespace to another tablespace.
C. All the components may be moved into SYSAUX tablespace.
D. All the components may be moved from the SYSAUX tablespace.
Answer: B,D
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Explanation:
V$SYSAUX_OCCUPANTS displays SYSAUX tablespace occupant information.
MOVE_PROCEDURE:Name of the move procedure; null if not applicable
For example, the tables and indexes that were previously owned by the system user can now be
specified for a SYSAUX tablespace. You can query the v$sysaux_occupants view to find the exact
components stored within the SYSAUX tablespace.
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