Questions Ask for 1z0 062 pdf

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Q1. On your Oracle 12c database, you Issue the following commands to create indexes 

SQL > CREATE INDEX oe.ord_customer_ix1 ON oe.orders (customers_id, sales_rep_id) INVISIBLE; 

SQL> CREATE BITMAP INDEX oe.ord_customer_ix2 ON oe.orders (customers_id, sales_rep_id); 

Which two statement are correct? 

A. Both the indexes are created; however, only the ORD_COSTOMER index is visible. 

B. The optimizer evaluates index access from both the Indexes before deciding on which index to use for query execution plan. 

C. Only the ORD_CUSTOMER_IX1 index is created. 

D. Only the ORD_CUSTOMER_IX2 index is created. 

E. Both the indexes are updated when a new row is inserted, updated, or deleted In the orders table. 

Answer: A,E 

Explanation: 11G has a new feature called Invisible Indexes. An invisible index is invisible to the optimizer as default. Using this feature we can test a new index without effecting the execution plans of the existing sql statements or we can test the effect of dropping an index without dropping it. 

Q2. Which three statements are true about a job chain? 

A. It can contain a nested chain of jobs. 

B. It can be used to implement dependency-based scheduling. 

C. It cannot invoke the same program or nested chain in multiple steps in the chain. 

D. It cannot have more than one dependency. 

E. It can be executed using event-based or time-based schedules. 

Answer: A,B,E 


Q3. You are about to plug a multi-terabyte non-CDB into an existing multitenant container database (CDB). 

The characteristics of the non-CDB are as follows: 

Version: Oracle Database 11g Release 2 ( 64-bit Character set: AL32UTF8 National character set: AL16UTF16 O/S: Oracle Linux 6 64-bit 

The characteristics of the CDB are as follows: 

Version: Oracle Database 12c Release 1 64-bit Character Set: AL32UTF8 National character set: AL16UTF16 O/S: Oracle Linux 6 64-bit 

Which technique should you use to minimize down time while plugging this non-CDB into the CDB? 

A. Transportable database 

B. Transportable tablespace 

C. Data Pump full export/import 

D. The DBMS_PDB package 



Explanation: * Overview, example: 

-Log into ncdb12c as sys 

-Get the database in a consistent state by shutting it down cleanly. 

-Open the database in read only mode 

-Run DBMS_PDB.DESCRIBE to create an XML file describing the database. 

-Shut down ncdb12c 

-Connect to target CDB (CDB2) 

-Check whether non-cdb (NCDB12c) can be plugged into CDB(CDB2) 

-Plug-in Non-CDB (NCDB12c) as PDB(NCDB12c) into target CDB(CDB2). 

-Access the PDB and run the noncdb_to_pdb.sql script. 

-Open the new PDB in read/write mode. 

* You can easily plug an Oracle Database 12c non-CDB into a CDB. Just create a PDB manifest file for the non-CDB, and then use the manifest file to create a cloned PDB in the CDB. 

* Note that to plugin a non-CDB database into a CDB, the non-CDB database needs to be of version 12c as well. So existing 11g databases will need to be upgraded to 12c before they can be part of a 12c CDB. 

Q4. Identify three valid options for adding a pluggable database (PDB) to an existing multitenant container database (CDB). 

A. Use the CREATE PLUGGABLE DATABASE statement to create a PDB using the files from the SEED. 

B. Use the CREATE DATABASE . . . ENABLE PLUGGABLE DATABASE statement to provision a PDB by copying file from the SEED. 

C. Use the DBMS_PDB package to clone an existing PDB. 

D. Use the DBMS_PDB package to plug an Oracle 12c non-CDB database into an existing CDB. 

E. Use the DBMS_PDB package to plug an Oracle 11 g Release 2 ( non-CDB database into an existing CDB. 

Answer: A,C,D 

Explanation: Use the CREATE PLUGGABLE DATABASE statement to create a pluggable database (PDB). 

This statement enables you to perform the following tasks: 

* (A) Create a PDB by using the seed as a template 

Use the create_pdb_from_seed clause to create a PDB by using the seed in the multitenant container database (CDB) as a template. The files associated with the seed are copied to a new location and the copied files are then associated with the new PDB. 

* (C) Create a PDB by cloning an existing PDB 

Use the create_pdb_clone clause to create a PDB by copying an existing PDB (the source PDB) and then plugging the copy into the CDB. The files associated with the source PDB are copied to a new location and the copied files are associated with the new PDB. This operation is called cloning a PDB. 

The source PDB can be plugged in or unplugged. If plugged in, then the source PDB can be in the same CDB or in a remote CDB. If the source PDB is in a remote CDB, then a database link is used to connect to the remote CDB and copy the files. 

* Create a PDB by plugging an unplugged PDB or a non-CDB into a CDB 

Use the create_pdb_from_xml clause to plug an unplugged PDB or a non-CDB into a CDB, using an XML metadata file. 

Q5. Your multitenant container database (CDB) contains some pluggable databases (PDBs), you execute the following command in the root container: 

Which two statements are true? 

A. Schema objects owned by the C# # A_ADMIN common user can be shared across all PDBs. 

B. The C # # A_ADMIN user will be able to use the TEMP_TS temporary tablespace only in root. 

C. The command will, create a common user whose description is contained in the root and each PDB. 

D. The schema for the common user C # # A_ADMIN can be different in each container. 

E. The command will create a user in the root container only because the container clause is not used. 

Answer: C,D 

Q6. What is the result of executing a TRUNCATE TABLE command on a table that has Flashback Archiving enabled? 

A. It fails with the ORA-665610 Invalid DDL statement on history-tracked message 

B. The rows in the table are truncated without being archived. 

C. The rows in the table are archived, and then truncated. 

D. The rows in both the table and the archive are truncated. 


Explanation: You cannot roll back a TRUNCATE TABLE statement, nor can you use a FLASHBACK TABLE statement to retrieve the contents of a table that has been truncated. 

Q7. You conned using SQL Plus to the root container of a multitenant container database (CDB) with SYSDBA privilege. 

The CDB has several pluggable databases (PDBs) open in the read/write mode. 

There are ongoing transactions in both the CDB and PDBs. 

What happens alter issuing the SHUTDOWN TRANSACTIONAL statement? 

A. The shutdown proceeds immediately. 

The shutdown proceeds as soon as all transactions in the PDBs are either committed or rolled hack. 

B. The shutdown proceeds as soon as all transactions in the CDB are either committed or rolled back. 

C. The shutdown proceeds as soon as all transactions in both the CDB and PDBs are either committed or rolled back. 

D. The statement results in an error because there are open PDBs. 



Shuts down a currently running Oracle Database instance, optionally closing and dismounting a database. If the current database is a pluggable database, only the pluggable database is closed. The consolidated instance continues to run. 

Shutdown commands that wait for current calls to complete or users to disconnect such as SHUTDOWN NORMAL and SHUTDOWN TRANSACTIONAL have a time limit that the SHUTDOWN command will wait. If all events blocking the shutdown have not occurred within the time limit, the shutdown command cancels with the following message: 

ORA-01013: user requested cancel of current operation 

* If logged into a CDB, shutdown closes the CDB instance. 

To shutdown a CDB or non CDB, you must be connected to the CDB or non CDB instance that you want to close, and then enter 


Database closed. 

Database dismounted. 

Oracle instance shut down. 

To shutdown a PDB, you must log into the PDB to issue the SHUTDOWN command. 


Pluggable Database closed. 


* Prerequisites for PDB Shutdown 

When the current container is a pluggable database (PDB), the SHUTDOWN command can only be used if: 

The current user has SYSDBA, SYSOPER, SYSBACKUP, or SYSDG system privilege. 

The privilege is either commonly granted or locally granted in the PDB. 

The current user exercises the privilege using AS SYSDBA, AS SYSOPER, AS 

SYSBACKUP, or AS SYSDG at connect time. To close a PDB, the PDB must be open. 

Q8. You notice a performance change in your production Oracle 12c database. You want to know which change caused this performance difference. 

Which method or feature should you use? 

A. Compare Period ADDM report 

B. AWR Compare Period report 

C. Active Session History (ASH) report 

D. Taking a new snapshot and comparing it with a preserved snapshot 


Explanation: The awrddrpt.sql report is the Automated Workload Repository Compare 

Period Report. The awrddrpt.sql script is located in the $ORACLE_HOME/rdbms/admin directory. 


Not A: Compare Period ADDM 

Use this report to perform a high-level comparison of one workload replay to its capture or to another replay of the same capture. Only workload replays that contain at least 5 minutes of database time can be compared using this report. 

Q9. Your database supports an online transaction processing (OLTP) application. The application is undergoing some major schema changes, such as addition of new indexes and materialized views. You want to check the impact of these changes on workload performance. 

What should you use to achieve this? 

A. Database replay 

B. SQL Tuning Advisor 

C. SQL Access Advisor 

D. SQL Performance Analyzer 

E. Automatic Workload Repository compare reports 


Explanation: You can use the SQL Performance Analyzer to analyze the SQL performance impact of any type of system change. Examples of common system changes include: 

.Database upgrades 

.Configuration changes to the operating system, hardware, or database 

.Database initialization parameter changes 

.Schema changes, such as adding new indexes or materialized views 

.Gathering optimizer statistics 

.SQL tuning actions, such as creating SQL profiles 

Q10. 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