1z0-063: Oracle Database 12c: Advanced Administration

Which three types of failures are detected by the Data Recovery Advisor (DRA)?

loss of a non-critical data file
loss of a control file
physical data block corruption
logical data block corruption
loss of an archived redo log file

Correct answer: ABC

Explanation:

Reference:http://docs.oracle.com/cd/B28359_01/backup.111/b28270/rcmrepai.htm#BRADV89728

Reference:

http://docs.oracle.com/cd/B28359_01/backup.111/b28270/rcmrepai.htm#BRADV89728

You want to capture column group usage and gather extended statistics for better cardinality estimates for the customers table in the SH schema.

Examine the following steps:

1. Issue the SELECTDBMS_STATS. CREATE_EXTENDED_STATS(‘SH’, 'CUSTOMERS')from dual statement.

2. Execute the dbms_stats.seed_col_usage (null,‘SH’,500) procedure.

3. Execute the required queries on the customers table.

4. Issue the select dbms_stats.reportwcol_usage(‘SH’, 'customers') from dual statement.

Identify the correct sequence of steps.

3, 2, 1, 4
2, 3, 4, 1
4, 1, 3, 2
3, 2, 4, 1

Correct answer: B

Explanation:

Step 1 (2). Seed column usage Oracle must observe a representative workload, in order to determine the appropriate column groups. Using the new procedure DBMS_STATS.SEED_COL_USAGE, you tell Oracle how long it should observe the workload. Step 2: (3) You don't need to execute all of the queries in your work during this window. You can simply run explain plan for some of your longer running queries to ensure column group information is recorded for these queries.Step 3. (1) Create the column groups At this point you can get Oracle to automatically create the column groups for each of the tables based on the usage information captured during the monitoring window. You simply have to call the DBMS_STATS.CREATE_EXTENDED_STATS function for each table.This function requires just two arguments, the schema name and the table name. From then on, statistics will be maintained for each column group whenever statistics are gathered on the table. Note:* DBMS_STATS.REPORT_COL_USAGE reports column usage information and records all the SQL operations the database has processed for a given object. * The Oracle SQL optimizer has always been ignorant of the implied relationships between data columns within the same table. While the optimizer has traditionally analyzed the distribution of values within a column, he does not collect value-based relationships between columns. * Creating extended statistics Here are the steps to create extended statistics for related table columns withdbms_stats.created_extended_stats:1 - The first step is to create column histograms for the related columns. 2 – Next, we run dbms_stats.create_extended_stats to relate the columns together. Unlike a traditional procedure that is invoked via an execute (“exec”) statement, Oracle extended statistics are created via a select statement.

Step 1 (2). Seed column usage

Oracle must observe a representative workload, in order to determine the appropriate column groups. Using the new procedure DBMS_STATS.SEED_COL_USAGE, you tell Oracle how long it should observe the workload.

Step 2: (3) You don't need to execute all of the queries in your work during this window. You can simply run explain plan for some of your longer running queries to ensure column group information is recorded for these queries.

Step 3. (1) Create the column groups

At this point you can get Oracle to automatically create the column groups for each of the tables based on the usage information captured during the monitoring window. You simply have to call the DBMS_STATS.CREATE_EXTENDED_STATS function for each table.This function requires just two arguments, the schema name and the table name. From then on, statistics will be maintained for each column group whenever statistics are gathered on the table.

Note:

* DBMS_STATS.REPORT_COL_USAGE reports column usage information and records all the SQL operations the database has processed for a given object.

* The Oracle SQL optimizer has always been ignorant of the implied relationships between data columns within the same table. While the optimizer has traditionally analyzed the distribution of values within a column, he does not collect value-based relationships between columns.

* Creating extended statistics

Here are the steps to create extended statistics for related table columns withdbms_stats.created_extended_stats:

1 - The first step is to create column histograms for the related columns.

2 – Next, we run dbms_stats.create_extended_stats to relate the columns together.

Unlike a traditional procedure that is invoked via an execute (“exec”) statement, Oracle extended statistics are created via a select statement.

Examine the initialization parameter that is set in the PFILE:

DB_CREATE_FILE_DEST ='/u01/app/oracle/oradata/'

You execute the following command to create theCDB1. container database (CDB):

SQL>CREATEDATABASECDB1

DEFAULTTABLESPACE users

DEFAULTTEMPORARY TABLESPACEtemp

UNDO TABLESPACEundotbsl

ENABLEPLUGGA3LEDATABASE

SEED

SYSTEMDATAFILESSIZE125M AUTOEXTEND ON NEXT10M MAXSIZEUNLIMITED

SYSAUXDATAFILESSIZE100M;

Which three statements are true?

It creates a multitenant container database with a root and a seed pluggable database (PDB) that are opened in read-write and read-only modes, respectively.
The files created for both the root and seed databases use Oracle Managed Files (OMF).
It creates a multitenant container database with the root and seed databases opened and one PDB mounted.
It sets the users tablespace as the default for both the root and seed databases.
undotbs1 is used as the undo tablespace for both the root and seed databases.
It creates a multitenant container database with the root database opened and the seed database mounted.

Correct answer: ABE

Examine the steps to configure Oracle Secure Backup (OSB) for use with RMAN:

1.Create media families for data files and archived redo log files.

2.Configure database backup storage selectors or RMAN media management parameters.

3.Create an OSB user preauthorized for RMAN operations.

4.Configure RMAN Access to the OSB SBT.

5.Disable Non-Uniform Memory Access (NUMA) awareness by setting the ob_ignore_numa parameter to 0.

Identify the steps in the correct order.

1, 4, 3, 2, 5
1, 3, 4, 5, 2
4, 3, 1, 2, 5
4, 3, 5, 1, 2

Correct answer: C

Examine the RMAN command:

RMAN> SET ENCRYPTION IDENTIFIED BY <password> ON FOR ALL TABLESPACES; RMAN> BACKUP DATABASE PLUS ARCHIVELOG;

Which type of encryption is used for the backup performed by using this command?

password-mode encryption
dual-mode encryption
transparent encryption
default encryption

Correct answer: A

Explanation:

Reference:http://docs.oracle.com/cd/B28359_01/backup.111/b28270/rcmbckad.htm#CEGEJABH (to make password –encrypted backups)

Reference:

http://docs.oracle.com/cd/B28359_01/backup.111/b28270/rcmbckad.htm#CEGEJABH (to make password –encrypted backups)

The following parameters are set for your Oracle 12c database instance:

OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES=FALSE OPTIMIZER_USE_SQL_PLAN_BASELINES=TRUE

You want to manage the SQL plan evolution task manually. Examine the following steps:

1.Set the evolve task parameters.

2.Create the evolve task by using the DBMS_SPM.CREATE_EVOVLE_TASK function.

3.Implement the recommendations in the task by using the DBMS_SPM.IMPLEMENT_EVOLVE_TASK function.

4.Execute the evolve task by using the DBMS_SPM.EXECUTE_EVOLVE_TASK function.

5.Report the task outcome by using the DBMS_SPM.REPORT_EVOLVE_TASK function.

Identify the correct sequence of steps.

2, 4, 5
2, 1, 4, 3, 5
1, 2, 3, 4, 5
1, 2, 4, 5

Correct answer: B

You created a database with DBCA by using one of the Oracle supplied templates.

Which is the default permanent tablespace for all users except DBSNMP and OUTLN?

USERS
SYSTEM
SYSAUX
EXAMPLE

Correct answer: A

Explanation:

This table space is used to store permanent user objects and data. Like the TEMP table space, every database should have a table space for permanent user data that is assigned to users. Otherwise, user objects will be created in the SYSTEM table space, which is not good practice. In the preconfigured database, USERS is assigned the default table space, and space for all objects created by non-system users comes from this table space. For system users, the default permanent table space remains SYSTEM.

Your database is running in archivelog mode. Examine the parameters for your database instance:

LOG_ARCHIVE_DEST_l ='LOCATION=/disk1/arch MANDATORY'

LOG_ARCHIVE_DEST_2 ='LOCATION=/disk2/arch'

LOG_ARCHIVE_DEST_3 ='LOCATIO=/disk3/arch'

LOG_ARCHIVE_DEST _4 ='LOCATIONs/disk4/arch'

LOG_ARCHIVE _MIN_SUCCEED_DEST = 2

While the database is open, you notice that the destination set by the log_archive_dest_1 parameter is not available. All redo log groups have been used.

What happens at the next log switch?

The database instance hangs and the redo log files are not overwritten.
The archived redo log files are written to the fast recovery area until the mandatory destination is made available.
The database instance is shutdown immediately.
The destination set by the log_archive_dest parameter is ignored and the archived redo log files are created in the next two available locations to guarantee archive log success.

Correct answer: D

Identify three scenarios in which RMAN will use backup sets to perform active database duplication.

when the duplicate ... from active database command contains the section size clause
when you perform active database duplication on a database with flashback disabled
when you specify set encryption before the duplicate ... from active database command
when the number of auxiliary channels allocated is equal to or greater than the number of target channels
when you perform active database duplication on a database that has read-only tablespaces

Correct answer: ACD

Explanation:

Reference:http://docs.oracle.com/database/121/BRADV/rcmdupdb.htm#BRADV298

Reference:

http://docs.oracle.com/database/121/BRADV/rcmdupdb.htm#BRADV298

Which two statements are true about recovering logically corrupted tables or table partitions from an RMAN backup?

Tables or table partitions can be recovered by using an auxiliary instance only.
Tables or table partitions with a foreign key cannot be recovered.
Tables or table partitions can be recovered only when the database is in mount state.
Tables or table partitions from the system and sysaux tablespaces cannot be recovered.
Tables with not null constraints cannot be recovered.

Correct answer: AD

Explanation:

Reference:http://docs.oracle.com/database/121/BRADV/rcmresind.htm#BRADV695 (Limitations of Recovering Tables and Table Partitions from RMAN Backups)

Reference:

http://docs.oracle.com/database/121/BRADV/rcmresind.htm#BRADV695 (Limitations of Recovering Tables and Table Partitions from RMAN Backups)

Vendor:	Oracle
Exam Code:	1z0-063
Exam Name:	Oracle Database 12c: Advanced Administration
Date:	Jul 24, 2018
File Size:	807 KB

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