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Question 1:
Examine the parameters for your database instance:
You execute the following command:
SQL> ALTER TABLESPACE undotbs1 RETENTION NOGUARANTEE;
Which statement is true in this scenario?
A. Undo data is written to flashback logs after 1200 seconds.
B. Inactive undo data is retained for 1200 seconds even if subsequent transactions fail due to lack of space in the undo tablespace.
C. You can perform a Flashback Database operation only within the duration of 1200 seconds.
D. An attempt is made to keep inactive undo for 1200 seconds but transactions may overwrite the undo before that time has elapsed.
Correct Answer: D
Question 2:
As a user of the ORCL database, you establish a database link to the remote HQ database such that all users in the ORCL database may access tables only from the SCOTT schema in the HQ database. SCOTT\’s password is TIGER. The service mane “HQ” is used to connect to the remote HQ database.
Which command would you execute to create the database link?
A. CREATE DATABASE LINK HQ USING \’HQ\’;
B. CREATE DATABASE LINK HQ CONNECT TO CURRENT_USER USING `HQ\’;
C. CREATE PUBLIC DATABASE LINK HQ CONNECT TO scott IDENTIFIED BY tiger USING \’HQ\’;
D. CREATE DATABASE LINK HQ CONNECT TO scott IDENTIFIED BY tiger USING \’HQ\’;
Correct Answer: C
Question 3:
You plan to create a database by using the Database Configuration Assistant (DBCA), with the following
specifications:
Applications will connect to the database via a middle tier.
The number of concurrent user connections will be high.
The database will have mixed workload, with the execution of complex BI queries scheduled at night.
Which DBCA option must you choose to create the database?
A. a General Purpose database template with default memory allocation
B. a Data Warehouse database template, with the dedicated server mode option and AMM enabled
C. a General Purpose database template, with the shared server mode option and Automatic Memory Management (AMM) enabled
D. a default database configuration
Correct Answer: C
References:
Question 4:
The ORCL database is configured to support shared server mode. You want to ensure that a user connecting remotely to the database instance has a one-to-one ratio between client and server processes.
Which connection method guarantees that this requirement is met?
A. connecting by using an external naming method
B. connecting by using the easy connect method
C. creating a service in the database by using the dbms_service.create_service procedure and using this service for creating a local naming service
D. connecting by using the local naming method with the server = dedicated parameter set in the tnsnames.ora file for the net service
E. connecting by using a directory naming method
Correct Answer: D
Question 5:
The HR user receives the following error while inserting data into the sales table:
On investigation, you find that the users tablespace uses Automatic Segment Space Management (ASSM). It is the default tablespace for the HR user with an unlimited quota on it.
Which two methods would you use to resolve this error? (Choose two.)
A. Altering the data file associated with the USERS tablespace to extend automatically
B. Adding a data file to the USERS tablespace
C. Changing segment space management for the USERS tablespace to manual
D. Creating a new tablespace with autoextend enabled and changing the default tablespace of the HR user to the new tablespace
E. Enabling resumable space allocation by setting the RESUMABLE_TIMEOUT parameter to a nonzero value
Correct Answer: AB
Question 6:
Which three factors influence the optimizer\’s choice of an execution plan? (Choose three.)
A. the optimizer_mode initialization parameter
B. operating system (OS) statistics
C. cardinality estimates
D. object statistics in the data dictionary
E. fixed baselines
Correct Answer: ACD
Question 7:
Which action takes place when a file checkpoint occurs?
A. The checkpoint position is advanced in the checkpoint queue.
B. All buffers for a checkpointed file that were modified before a specific SCN are written to disk by DBWn and the SCN is stored in the control file.
C. The Database Writer process (DBWn) writes all dirty buffers in the buffer cache to data files.
D. The Log Writer process (LGWR) writes all redo entries in the log buffer to online redo log files.
Correct Answer: B
Question 8:
Which task would you recommend before using the Database Upgrade Assistant (DBUA) to upgrade a single-instance Oracle 11g R2 database to Oracle Database 12c?
A. shutting down the database instance that is being upgraded
B. executing the catctl.pl script to run the upgrade processes in parallel
C. running the Pre-Upgrade Information Tool
D. copying the listener.ora file to the new ORACLE_HOME
Correct Answer: C
References: http://docs.oracle.com/cd/E11882_01/server.112/e23633/upgrade.htm#UPGRD12395
Question 9:
Which statement is true regarding the startup of a database instance?
A. The instance does not start up normally and requires manual media recovery after a shutdown using the abort option.
B. Uncommitted transactions are rolled back during the startup of the database instance after a shutdown using the immediate option.
C. There is no difference in the underlying mechanics of the startup whether the database is shut down by using the immediate option or the abort option.
D. Media recovery is required when the database is shut down by using either the immediate option or the abort option.
E. Instance recovery is not required if the database instance was shut down by using SHUTDOWN IMMEDIATE.
Correct Answer: E
References: http://docs.oracle.com/cd/A87860_01/doc/server.817/a76956/start.htm
Question 10:
Examine the memory-related parameters set in the SPFILE of an Oracle database:
Which statement is true?
A. Only SGA components are sized automatically.
B. Memory is dynamically re-allocated between the SGA and PGA as needed.
C. The size of the PGA cannot grow automatically beyond 500 MB.
D. The value of the MEMORY_TARGET parameter cannot be changed dynamically.
Correct Answer: B
Question 11:
Which two statements are true about extents? (Choose two.)
A. Blocks belonging to an extent can be spread across multiple data files.
B. Data blocks in an extent are logically contiguous but can be non-contiguous on disk.
C. The blocks of a newly allocated extent, although free, may have been used before.
D. Data blocks in an extent are automatically reclaimed for use by other objects in a tablespace when all the rows in a table are deleted.
Correct Answer: BC
Question 12:
Examine the query and its output: What might have caused three of the alerts to disappear?
A. The threshold alerts were cleared and transferred to DBA_ALERT_HISTORY.
B. An Automatic Workload Repository (AWR) snapshot was taken before the execution of the second query.
C. An Automatic Database Diagnostic Monitor (ADOM) report was generated before the execution of the second query.
D. The database instance was restarted before the execution of the second query.
Correct Answer: D
Question 13:
Which two statements are true? (Choose two.)
A. A role cannot be assigned external authentication.
B. A role can be granted to other roles.
C. A role can contain both system and object privileges.
D. The predefined RESOURCE role includes the UNLIMITED TABLESPACE privilege.
E. All roles are owned by the SYS user.
F. The predefined CONNECT role is always automatically granted to all new users at the time of their creation.
Correct Answer: BC
Question 14:
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 (11.2.0.3.0) non-CDB database into an existing CDB.
Correct Answer: ACD
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.
Question 15:
Your database supports a DSS workload that involves the execution of complex queries: Currently, the library cache contains the ideal workload for analysis. You want to analyze some of the queries for an application that are cached in the library cache.
What must you do to receive recommendations about the efficient use of indexes and materialized views to improve query performance?
A. Create a SQL Tuning Set (STS) that contains the queries cached in the library cache and run the SQL Tuning Advisor (STA) on the workload captured in the STS.
B. Run the Automatic Workload Repository Monitor (ADDM).
C. Create an STS that contains the queries cached in the library cache and run the SQL Performance Analyzer (SPA) on the workload captured in the STS.
D. Create an STS that contains the queries cached in the library cache and run the SQL Access Advisor on the workload captured in the STS.
Correct Answer: D
*
SQL Access Advisor is primarily responsible for making schema modification recommendations, such as adding or dropping indexes and materialized views. SQL Tuning Advisor makes other types of
recommendations, such as creating SQL profiles and restructuring SQL statements.
*
The query optimizer can also help you tune SQL statements. By using SQL Tuning Advisor and SQL Access Advisor, you can invoke the query optimizer in advisory mode to examine a SQL statement or set of statements and determine how to improve their efficiency. SQL Tuning Advisor and SQL Access Advisor can make various recommendations, such as creating SQL profiles, restructuring SQL statements, creating additional indexes or materialized views, and refreshing optimizer statistics.
Note:
*
Decision support system (DSS) workload
*
The library cache is a shared pool memory structure that stores executable SQL and PL/SQL code. This cache contains the shared SQL and PL/SQL areas and control structures such as locks and library cache handles.