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NEW QUESTION 1
As part of a manual update process, you install Oracle Database 12c software, prepare a new ORACLE_HOME, you shut down an existing single-instance database that runs from that ORACLE_HOME.
What should you do next to start the upgrade of this database?

  • A. Start up the database instance by using the STARTUP UPGRADE command by using the server parameter file.
  • B. Start up the database instance by using the new location of the server parameter file and run the catupgrd.sql script from the new ORACLE_HOME to use parallel upgrade options that reduce down time.
  • C. Start up the database instance by using the new location of the server parameter file and run the catctl.pl script from the new ORACLE_HOME to use parallel upgrade options that reduce down time.
  • D. Start up the database instance by using the new location of the server parameter file and run the catuppst.sql script to generate informational messages and log files during the upgrade.

Answer: C

NEW QUESTION 2
Which three tasks can be automatically performed by the Automatic Data Optimization feature of Information Lifecycle Management (ILM)?

  • A. tracking the most recent read time for a table segment in a user tablespace
  • B. tracking the most recent write time for a table segment in a user tablespace
  • C. tracking insert time by row for table rows
  • D. tracking the most recent write time for each block in a table segment
  • E. tracking the most recent read time for a table segment in the sysauxtablespace
  • F. tracking the most recent write time for a table segment in the sysauxtablespace

Answer: ABD

Explanation: Tracking of segment-level reads and writes At the block level, Heat Map tracks only the most recent modification time stamp.

NEW QUESTION 3
Which three types of failures are detected by the Data Recovery Advisor (DRA)?

  • A. loss of a non-critical data file
  • B. loss of a control file
  • C. physical data block corruption
  • D. logical data block corruption
  • E. loss of an archived redo log file

Answer: BDE

Explanation: Data Recovery Advisor can diagnose failures such as the following: Components such as datafiles and control files that are not accessible because they do not exist, do not have the correct access permissions, have been taken offline, and so on Physical corruptions such as block checksum failures and invalid block header field values

NEW QUESTION 4
In which three scenarios is media recovery required?

  • A. when a tablespace is accidentally dropped from a database
  • B. when archived redo log files are lost
  • C. when data files are lost
  • D. when one of the online redo log members is corrupted
  • E. when all control files are lost

Answer: ADE

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http://docs.oracle.com/cd/A87860_01/doc/server.817/a76993/recoscen.htm

NEW QUESTION 5
Which two statements are true regarding an Automatic Storage Management (ASM) instance? (Choose two.)

  • A. An ASM instance mounts an ASM control file
  • B. An ASM instance uses the ASMB process for rebalancing of disks within a disk group
  • C. Automatic Memory Management is enabled in an ASM instance even when the MEMORY_TARGET parameters not set explicitly
  • D. An RDBMS instance gets connected to an ASM instance using ASMB as a foreground process when the database instance is started

Answer: CD

NEW QUESTION 6
Which two statements are true regarding Oracle Data Pump?

  • A. EXPDP and IMPDP are the client components of Oracle Data Pump.
  • B. DBMS_DATAPUMP PL/SQL packages can be used independently of the Data Pump clients.
  • C. Oracle Data Pump export and import operations can be performed only by users with the SYSDBA privilege.
  • D. Oracle Data Pump imports can be done from the export files generated in the Original Export Utility.
  • E. EXPDP and IMPDP use the procedures provided by DBMS_METADATA to execute export and import commands.

Answer: AB

Explanation: References: http://docs.oracle.com/cd/B19306_01/server.102/b14215/dp_overview.htm

NEW QUESTION 7
You execute the RMAN commands:
RMAN> BACKUP VALIDATE DATABASE; RMAN> RECOVER CORRUPTION LIST;
Which task is performed by these commands?

  • A. Corrupted blocks, if any, are repaired in the backup created.
  • B. Only those data files that have corrupted blocks are backed up.
  • C. Corrupted blocks in the data files are checked and repaired before performing the database backup.
  • D. The database is checked for physically corrupt blocks and any corrupted blocks are repaire

Answer: D

Explanation: Reference: http://www.dba-oracle.com/t_rman_36_validate_backup.htm

NEW QUESTION 8
What can be automatically implemented after the SQL Tuning Advisor is run as part of the Automated Maintenance Task?

  • A. statistics recommendations
  • B. SQL profile recommendations
  • C. SQL statement restructure recommendations
  • D. creation of materialized views to improve query performance

Answer: B

Explanation: Once automatic SQL tuning begins, which by default runs for at most one hour during a maintenance window, the following steps are performed: ... During the tuning process, all recommendation types are considered and reported, but only SQL profiles can be implemented automatically.
References: https://docs.oracle.com/cd/B28359_01/server.111/b28274/sql_tune.htm#CHDJDFGE

NEW QUESTION 9
You are administering a multitenant container database (CDB) that contains multiple pluggable databases (PDBs). You are connected to cdb$root as the sys user. You execute the commands: SQL> CREATE USER C##ADMIN IDENTIFIED BY orcll23;
SQL> CREATE ROLE C##CONNECT;
SQL> GRANT CREATE SESSION, CREATE TABLE, SELECT ANY TABLE TO C##CONNECT; SQL> GRANT C##CONNECT to C##ADMIN CONTAINER=ALL;
Which statement is true about the c##connect role?

  • A. It is created only in cdb$root and cannot be granted to the c##admin user with the container=all clause.
  • B. It is granted to the c##admin user only in the CDB.
  • C. It is granted to the c##admin user in all PDBs and can be granted only to a local user in a PDB.
  • D. It is granted to the c##admin user in all PDBs and can be granted object and system privileges for a PDB.

Answer: D

Explanation: https://docs.oracle.com/database/121/SQLRF/statements_6014.htm#SQLRF01311
“CONTAINER Clause The CONTAINER clause applies when you are connected to a CDB. However, it is not necessary to specify the CONTAINER clause because its default values are the only allowed
values. To create a common role, you must be connected to the root. You can optionally specify CONTAINER = ALL, which is the default when you are connected to the root. To create a local role, you must be connected to a PDB. You can optionally specify CONTAINER = CURRENT, which is the default when you are connected to a PDB.”

NEW QUESTION 10
Identify three scenarios in which RMAN will use backup sets to perform active database duplication.

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

Answer: ACD

Explanation: Starting with Oracle Database 12c Release 1 (12.1), RMAN can use backup sets to transfer the source database files that need to be duplicated. The backup sets are transferred over the network to the auxiliary database. Backup sets can be encrypted for additional security. Specify the encryption
algorithm by using the SET ENCRYPTION ALGORITHM command before the DUPLICATE command. RMAN uses backup sets to perform active database duplication when the connection to the target database is established using a net service name and any one of the following conditions is satisfied:
The DUPLICATE ... FROM ACTIVE DATABASE command contains either the USING BACKUPSET, USING
COMPRESSED BACKUPSET, or SECTION SIZE clause. The number of auxiliary channels allocated is equal to or greater than the number of target channels allocated. http://docs.oracle.com/database/121/BRADV/rcmdupdb.htm#BRADV298

NEW QUESTION 11
Users report this error message when inserting rows into the orders table: ERROR atline1:
ORA-01654f:unable to extend index USERS.ORDERS_IND by 8in tablespace INDEXES You determine that the indexes tablespace is out of space and there is no free space on the filesystem used by the Oracle database.
Which two must you do to fix this problem without affecting currently executing queries?

  • A. drop and re-create the index
  • B. coalesce the orders„ind index
  • C. coalesce the indexes tablespace
  • D. perform an on line table rebuild using dbns_redefir.ition.
  • E. rebuild the index online moving it to another tablespace that has enough free space for the index

Answer: BE

Explanation: Reference: https://docs.oracle.com/cd/B28359_01/server.111/b28310/indexes004.htm#i1006864

NEW QUESTION 12
You create two Resource Manager plans, one for night time workloads, the other for day time.
How would you make the plans switch automatically?

  • A. Use job classes.
  • B. Use scheduler windows.
  • C. Use the mapping rule for the consumer groups.
  • D. Set the switch_time plan directive for both plans.
  • E. Use scheduler schedule

Answer: B

Explanation: The resource manager is only activated when a default resource plan is assigned. Only one resource plan can be active at any given time. Resource plan switches can be automated using scheduler windows or performed manually by setting the resource_manager_plan parameter using the alter system command as shown below.
http://www.dba-oracle.com/job_scheduling/resource_manager_plan.htm

NEW QUESTION 13
In which situation can you use Flashback Database?

  • A. when undoing a shrink data file operation
  • B. when retrieving a dropped tablespace
  • C. when returning to a point in time before the restoration or re-creation of a control file
  • D. when returning to a point in time before the most recent open resetlogs operation

Answer: D

Explanation: TO BEFORE RESETLOGS Returns the database to its state including all changes up to the SCN of the most recent OPEN RESETLOGS. Note: FLASHBACK DATABASE can only return the database to a point before the most recent OPEN RESETLOGS operation if your database has been upgraded to Oracle Database 10g Release 2 or later. http://docs.oracle.com/cd/B28359_01/backup.111/b28273/rcmsynta023.htm#RCMRF194

NEW QUESTION 14
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.

  • A. 3, 2, 1, 4
  • B. 2, 3, 4, 1
  • C. 4, 1, 3, 2
  • D. 3, 2, 4, 1

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.

NEW QUESTION 15
Which two statements are true about the Automatic Diagnostic Repository (ADR)?

  • A. The ADR base is shared across multiple instances.
  • B. The ADR base keeps all diagnostic information in binary format.
  • C. The ADR can be used to store statspack snapshots to diagnose database performance issues.
  • D. The ADR can be used for problem diagnosis even when the database instance is down.
  • E. The ADR is used to store Automatic Workload Repository (AWR) snapshot

Answer: AD

NEW QUESTION 16
You notice that the performance of your production 24/7 Oracle 12c database has significantly degraded. Sometimes you are not able to connect to the instance because it hangs. You do not want to restart the database instance.
How can you detect the cause of the degraded performance?

  • A. Enable Memory Access Mode, which reads performance data from SGA.
  • B. Use emergency monitoring to fetch data directly from SGA for analysis.
  • C. Run Automatic Database Diagnostic Monitor (ADDM) to fetch information from the latest Automatic Workload Repository (AWR) snapshots.
  • D. Use Active Session History (ASH) data and hang analysis in regular performance monitoring,
  • E. Run ADDM in diagnostic mod

Answer: B

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