Oracle Oracle Certifications 1Z0-060 Questions & Answers

• Question 91:

  Flashback is enabled for your multitenant container database (CDB), which contains two pluggable database (PDBs). A local user was accidently dropped from one of the PDBs.

  You want to flash back the PDB to the time before the local user was dropped. You connect to the CDB and execute the following commands:

  SQL > SHUTDOWN IMMEDIATE SQL > STARTUP MOUNT SQL > FLASHBACK DATABASE to TIME "TO_DATE ('08/20/12','MM/DD/YY')";

  Examine following commands:

  1.

  ALTER PLUGGABLE DATABASE ALL OPEN;

  2.

  ALTER DATABASE OPEN;

  3.

  ALTER DATABASE OPEN RESETLOGS;

  Which command or commands should you execute next to allow updates to the flashed back schema?

  A. Only 1

  B. Only 2

  C. Only 3

  D. 3 and 1

  E. 1 and 2

  Correct Answer: D

  http://www.oracle-base.com/articles/12c/multitentant-flashback-of-container-database-12cr1.php

• Question 92:

  Examine the commands executed to monitor database operations:

  $> conn sys oracle/oracle@prod as sysdba

  SQL > VAR eid NUMBER

  SQL > EXEC: eid:= DBMS_SQL_MONITOR.BEGIN_OPERATION ('batch_job', FORCED_TRACKING =>

  'Y');

  Which two statements are true? (Choose two.)

  A. Database operations will be monitored only when they consume a significant amount of resources.

  B. Database operations for all sessions will be monitored.

  C. Database operations will be monitored only if the STATISTICS_LEVEL parameter is set to TYPICAL and CONTROL_MANAGEMENT_PACK_ACCESS is set to DIAGNISTIC + TUNING.

  D. Only DML and DDL statements will be monitored for the session.

  E. All subsequent statements in the session will be treated as one database operation and will be monitored.

  Correct Answer: CE

  C: Setting the CONTROL_MANAGEMENT_PACK_ACCESS initialization parameter to DIAGNOSTIC +TUNING (default) enables monitoring of database operations. Real-Time SQL Monitoring is a feature of the Oracle Database Tuning Pack.

  Note:

  * The DBMS_SQL_MONITOR package provides information about Real-time SQL Monitoring and Real-

  time Database Operation Monitoring.

  *(not B) BEGIN_OPERATION Function starts a composite database operation in the current session.

  / (E) FORCE_TRACKING - forces the composite database operation to be tracked when the operation starts. You can also use the string variable 'Y'.

  / (not A) NO_FORCE_TRACKING - the operation will be tracked only when it has consumed at least 5 seconds of CPU or I/O time. You can also use the string variable 'N'.

• Question 93:

  Which three statements are true about the working of system privileges in a multitenant control database (CDB) that has pluggable databases (PDBs)?

  A. System privileges apply only to the PDB in which they are used.

  B. Local users cannot use local system privileges on the schema of a common user.

  C. The granter of system privileges must possess the set container privilege.

  D. Common users connected to a PDB can exercise privileges across other PDBs.

  E. System privileges with the with grant option container all clause must be granted to a common user before the common user can grant privileges to other users.

  Correct Answer: ACE

  A, Not D: In a CDB, PUBLIC is a common role. In a PDB, privileges granted locally to PUBLIC enable all local and common users to exercise these privileges in this PDB only.

  C: A user can only perform common operations on a common role, for example, granting privileges commonly to the role, when the following criteria are met:

  The user is a common user whose current container is root.

  The user has the SET CONTAINER privilege granted commonly, which means that the privilege applies in all containers.

  The user has privilege controlling the ability to perform the specified operation, and this privilege has been granted commonly

  Note:

  * Every privilege and role granted to Oracle-supplied users and roles is granted commonly except for system privileges granted to PUBLIC, which are granted locally.

• Question 94:

  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:

  

  The possible outcomes of this command and the actions to aggregate 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.

  4.

  Trace files may be aggregated by using the trcess utility.

  5.

  Trace files may be aggregated by using the tkprof utility.

  Identify the correct outcome and the action to aggregate the trace files.

  A. 1

  B. 2 and 4

  C. 2 and 5

  D. 3 and 4

  E. 3 and 5

  Correct Answer: B

  Tracing information is present in multiple trace files and you must use the trcsess tool to collect it into a single file.

  Note:

  *

  The procedure enables a trace for a given combination of Service, MODULE and ACTION name. The specification is strictly hierarchical: Service Name or Service Name/MODULE, or Service Name, MODULE, and ACTION name must be specified. Omitting a qualifier behaves like a wild-card, so that not specifying an ACTION means all ACTIONs. Using the ALL_ACTIONS constant achieves the same purpose.

  *

  SERV_MOD_ACT_TRACE_ENABLE Procedure

  This procedure will enable SQL tracing for a given combination of Service Name, MODULE and ACTION globally unless an instance_name is specified.

  *

  DBMS_MONITOR.SERV_MOD_ACT_TRACE_ENABLE(

  service_name IN VARCHAR2,

  module_name IN VARCHAR2 DEFAULT ANY_MODULE,

  action_name IN VARCHAR2 DEFAULT ANY_ACTION,

  waits IN BOOLEAN DEFAULT TRUE,

  binds IN BOOLEAN DEFAULT FALSE,

  instance_name IN VARCHAR2 DEFAULT NULL);

• Question 95:

  Your multitenant container database (CDB) contains pluggable databases (PDBs), you are connected to the PDB HR_PDB. You execute the following command:

  

  What is the result?

  A. It executes successfully and creates an UNDO tablespace in HR_PDB.

  B. It falls and reports an error because there can be only one UNDO tablespace in a CDB.

  C. It fails and reports an error because the CONTAINER=ALL clause is not specified in the command.

  D. It fails and reports an error because the CONTAINER=CURRENT clause is not specified in the command.

  E. It executes successfully but neither tablespace nor the data file is created.

  Correct Answer: E

  Interesting behavior in 12.1.0.1 DB of creating an undo tablespace in a PDB. With the new Multitenant architecture the undo tablespace resides at the CDB level and PDBs all share the same UNDO tablespace.

  When the current container is a PDB, an attempt to create an undo tablespace fails without returning an error.

• Question 96:

  You find this query being used in your Oracle 12c database:

  

  Which method a used by the optimizer to limit the rows being returned?

  A. A filter is added to the table query dynamically using ROWNUM to limit the rows to 20 percent of the total rows

  B. All the rows are returned to the client or middle tier but only the first 20 percent are returned to the screen or the application.

  C. A view is created during execution and a filter on the view limits the rows to 20 percent of the total rows.

  D. A TOP-N query is created to limit the rows to 20 percent of the total rows

  Correct Answer: C

• Question 97:

  Which three resources might be prioritized between competing pluggable databases when creating a multitenant container database plan (CDB plan) using Oracle Database Resource Manager? (Choose three.)

  A. Maximum Undo per consumer group

  B. Maximum Idle time

  C. Parallel server limit

  D. CPU

  E. Exadata I/O

  F. Local file system I/O

  Correct Answer: CDE

  http://docs.oracle.com/database/121/ADMIN/dbrm.htm#ADMIN11852

• Question 98:

  You created an encrypted tablespace:

  

  You then closed the encryption wallet because you were advised that this is secure.

  Later in the day, you attempt to create the EMPLOYEES table in the SECURESPACE tablespace with the SALT option on the EMPLOYEE column.

  Which is true about the result?

  A. It creates the table successfully but does not encrypt any inserted data in the EMPNAME column because the wallet must be opened to encrypt columns with SALT.

  B. It generates an error when creating the table because the wallet is closed.

  C. It creates the table successfully, and encrypts any inserted data in the EMPNAME column because the wallet needs to be open only for tablespace creation.

  D. It generates error when creating the table, because the salt option cannot be used with encrypted tablespaces.

  Correct Answer: B

• Question 99:

  On your Oracle Database, you issue the following commands to create indexes: SQL > CREATE INDEX oe.ord_customer_ix1 ON oe.orders (customer_id, sales_rep_id) INVISIBLE;

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

  Which two statements are true? (Choose two.)

  A. Only the ORD_CUSTOMER_IX1 index created.

  B. Both the indexes are updated when a row is inserted, updated, or deleted in the ORDERS table.

  C. Both the indexes are created: however, only ORD_CUSTOMERS_IX1 is used by the optimizer for queries on the ORDERS table.

  D. The ORD_CUSTOMER_IX1 index is not used by the optimizer even when the OPTIMIZER_USE_INVISIBLE_INDEXES parameters is set to true.

  E. Both the indexes are created and used by the optimizer for queries on the ORDERS table.

  F. Both the indexes are created: however, only ORD_CUSTOMERS_IX2 is used by the optimizer for queries on the ORDERS table.

  Correct Answer: BF

  Not A: Both indexes are created fine.

  B: The invisible index ORD_CUSTOMERS_IX1 and the bitmap index are both updated by DML operations on the Orders table.

  F: Since ORD_CUSTOMERS_IX1 is invisible only ORD_CUSTOMERS_IX2 is used by the query optimizer.

  Incorrect Answers:

  C, D, E:

  * ord_customer_ix1 is an invisible index and is therefore not used by the optimizer.

  * VISIBLE | INVISIBLE Use this clause to specify whether the index is visible or invisible to the optimizer. An invisible index is maintained by DML operations, but it is not be used by the optimizer during queries unless you explicitly set the parameter OPTIMIZER_USE_INVISIBLE_INDEXES to TRUE at the session or system level.

  Note: Specify BITMAP to indicate that index is to be created with a bitmap for each distinct key, rather than indexing each row separately. Bitmap indexes store the rowids associated with a key value as a bitmap. Each bit in the bitmap corresponds to a possible rowid. If the bit is set, then it means that the row with the corresponding rowid contains the key value. The internal representation of bitmaps is best suited for applications with low levels of concurrent transactions, such as data warehousing.

• Question 100:

  Which two statements are true when row archival management is enabled?

  A. The ORA_ARCHIVE_STATE column visibility is controlled by the ROW ARCHIVAL VISIBILITY session parameter.

  B. The ORA_ARCHIVE_STATE column is updated manually or by a program that could reference activity tracking columns, to indicate that a row is no longer considered active.

  C. The ROW ARCHIVAL VISIBILITY session parameter defaults to active rows only.

  D. The ORA_ARCHIVE_STATE column is visible if referenced in the select list of a query.

  E. The ORA_ARCHIVE_STATE column is updated automatically by the Oracle Server based on activity tracking columns, to Indicate that a row is no longer considered active.

  Correct Answer: BD

  http://gavinsoorma.com/2013/08/oracle-12c-new-feature-in-database-archiving/