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Exam Code:
1Z0-060Exam Name: Upgrade to Oracle Database 12c
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1Z0-060 Real Questions Total Q&A: 150 Questions and Answers
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NO.1 Identify three benefits of Unified Auditing.
A. Decreased use of storage to store audit trail rows in the database.
B. It improves overall auditing performance.
C. It guarantees zero-loss auditing.
D. The audit trail cannot be easily modified because it is read-only.
E. It automatically audits Recovery Manager (RMAN) events.
Answer: A,B,E
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Explanation:
A: Starting with 12c, Oracle has unified all of the auditing types into one single unit called Unified
auditing. You don't have to turn on or off all of the different auidting types individually and as a
matter of fact auditing is enabled by default right out of the box. The AUD$ and FGA$ tables have
been replaced with one single audit trail table. All of the audit data is now stored in Secure Files
table thus improving the overall management aspects of audit data itself.
B: Further the audit data can also be buffered solving most of the common performance related
problems seen on busy environments.
E: Unified Auditing is able to collect audit data for Fine Grained Audit, RMAN, Data Pump, Label
Security, Database Vault and Real Application Security operations.
Note:
* Benefits of the Unified Audit Trail
The benefits of a unified audit trail are many: / (B) Overall auditing performance is greatly improved.
The default mode that unified audit works is Queued Write mode. In this mode, the audit records
are batched in SGA queue and is persisted in a periodic way. Because the audit records are written
to SGA queue, there is a significant performance improvement.
/ The unified auditing functionality is always enabled and does not depend on the initialization
parameters that were used in previous releases
/ (A) The audit records, including records from the SYS audit trail, for all the audited components of
your Oracle Database installation are placed in one location and in one format, rather than your
having to look in different places to find audit trails in varying formats. This consolidated view
enables auditors to co-relate audit information from different components. For example, if an error
occurred during an INSERT statement, standard auditing can indicate the error number and the SQL
that was executed. Oracle Database Vault-specific information can indicate whether this error
happened because of a command rule violation or realm violation. Note that there will be two audit
records with a distinct AUDIT_TYPE. With this unification in place, SYS audit records appear with
AUDIT_TYPE set to Standard Audit.
/ The management and security of the audit trail is also improved by having it in single audit trail.
/ You can create named audit policies that enable you to audit the supported components listed at
the beginning of this section, as well as SYS administrative users. Furthermore, you can build
conditions and exclusions into your policies.
*Oracle Database 12c Unified Auditing enables selective and effective auditing inside the Oracle
database using policies and conditions. The new policy based syntax simplifies management of
auditing within the database and provides the ability to accelerate auditing based on conditions.
*The new architecture unifies the existing audit trails into a single audit trail, enabling simplified
management and increasing the security of audit data generated by the database.
NO.2 Your multitenant container database (CDB) contains a pluggable database, HR_PDB. The
default permanent tablespace in HR_PDB is USERDATA. The container database (CDB) is open and
you connect RMAN.
You want to issue the following RMAN command:
RMAN > BACKUP TABLESPACE hr_pdb:userdata; Which task should you perform before issuing the
command?
A. Place the root container in ARHCHIVELOG mode.
B. Take the user data tablespace offline.
C. Place the root container in the nomount stage.
D. Ensure that HR_PDB is open.
Answer: A
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NO.3 In your database, you want to ensure that idle sessions that are blocking active are
automatically terminated after a specified period of time.
How would you accomplish this?
A. Setting a metric threshold
B. Implementing Database Resource Manager
C. Enabling resumable timeout for user sessions
D. Decreasing the value of the IDLE_TIME resource limit in the default profile
Answer: D
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Explanation:
An Oracle session is sniped when you set the idle_time parameter to disconnect inactive sessions.
(It's only like sniping on ebay in that a time is set for an action to occur.)
Oracle has several ways to disconnect inactive or idle sessions, both from within SQL*Plus via
resources profiles (connect_time, idle_time), and with the SQL*net expire time parameter. Here are
two ways to disconnect an idle session:
Set the idle_time parameter in the user profile Set the sqlnet.ora parameter expire_time
NO.4 You notice a high number of waits for the db file scattered read and db file sequential read
events in the recent Automatic Database Diagnostic Monitor (ADDM) report. After further
investigation, you find that queries are performing too many full table scans and indexes are not
being used even though the filter columns are indexed.
Identify three possible reasons for this.
A. Missing or stale histogram statistics
B. Undersized shared pool
C. High clustering factor for the indexes
D. High value for the DB_FILE_MULTIBLOCK_READ_COUNT parameter
E. Oversized buffer cache
Answer: A,C,D
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Explanation:
D: DB_FILE_MULTIBLOCK_READ_COUNT is one of the parameters you can use to minimize I/O
during table scans. It specifies the maximum number of blocks read in one I/O operation during a
sequential scan. The total number of I/Os needed to perform a full table scan depends on such
factors as the size of the table, the multiblock read count, and whether parallel execution is being
utilized for the operation.
NO.5 The trace files may be aggregated by using the trcess utility.
NO.6 You execute the following piece of code with appropriate privileges: User SCOTT has been
granted the CREATE SESSION privilege and the MGR role.
Which two statements are true when a session logged in as SCOTT queries the SAL column in the
view and the table?
A. Data is redacted for the EMP .SAL column only if the SCOTT session does not have the MGR role
set.
B. Data is redacted for EMP .SAL column only if the SCOTT session has the MGR role set.
C. Data is never redacted for the EMP_V.SAL column.
D. Data is redacted for the EMP_V.SAL column only if the SCOTT session has the MGR role set.
E. Data is redacted for the EMP_V.SAL column only if the SCOTT session does not have the MGR role
set.
Answer: A,C
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Explanation:
Note:
*DBMS_REDACT.FULL completely redacts the column data.
*DBMS_REDACT.NONE applies no redaction on the column data. Use this function for development
testing purposes. LOB columns are not supported.
*The DBMS_REDACT package provides an interface to Oracle Data Redaction, which enables you to
mask (redact) data that is returned from queries issued by low-privileged users or an application.
*If you create a view chain (that is, a view based on another view), then the Data Redaction policy
also applies throughout this view chain. The policies remain in effect all of the way up through this
view chain, but if another policy is created for one of these views, then for the columns affected in
the subsequent views, this new policy takes precedence.
NO.7 You database is running an ARCHIVELOG mode.
The following parameter are set in your database instance:
LOG_ARCHIVE_FORMAT = arch+%t_%r.arc
LOG_ARCHIVE_DEST_1 = 'LOCATION = /disk1 /archive'
DB_RECOVERY_FILE_DEST_SIZE = 50G
DB_RECOVERY_FILE = '/u01 /oradata'
Which statement is true about the archived redo log files?
A. They are created only in the location specified by the LOG_ARCHIVE_DEST_1 parameter.
B. They are created only in the Fast Recovery Area.
C. They are created in the location specified by the LOG_ARCHIVE_DEST_1 parameter and in the
default location $ORACLE_HOME/dbs/arch.
D. They are created in the location specified by the LOG_ARCHIVE_DEST_1 parameter and the
location specified by the DB_RECOVERY_FILE_DEST parameter.
Answer: A
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Explanation:
You can choose to archive redo logs to a single destination or to multiple destinations. Destinations
can be local-within the local file system or an Oracle Automatic Storage Management (Oracle ASM)
disk group-or remote (on a standby database). When you archive to multiple destinations, a copy of
each filled redo log file is written to each destination. These redundant copies help ensure that
archived logs are always available in the event of a failure at one of the destinations. To archive to
only a single destination, specify that destination using the LOG_ARCHIVE_DEST and
LOG_ARCHIVE_DUPLEX_DEST initialization parameters. ARCHIVE_DEST initialization parameter. To
archive to multiple destinations, you can choose to archive to two or more locations using the
LOG_ARCHIVE_DEST_n initialization parameters, or to archive only to a primary and secondary
destination using the LOG_ ARCHIVE_DEST and LOG_ARCHIVE_DUPLEX_DEST initialization
parameters.
NO.8 Your database has the SRV1 service configured for an application that runs on middle-tier
application server. The application has multiple modules. You enable tracing at the service level by
executing the following command:
SQL > exec DBMS_MONITOR.SERV_MOD_ACT_TRACE_ENABLE ('SRV1');
The possible outcome and actions to aggregate the trace files are as follows:
1.The command fails because a module name is not specified.
2.A trace file is created for each session that is running the SRV1 service.
3.An aggregated trace file is created for all the sessions that are running the SRV1 service.
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