Exam Code: 1z0-067 (Practice Exam Latest Test Questions VCE PDF)
Exam Name: Upgrade Oracle9i/10g/11g OCA to Oracle Database 12c OCP
Certification Provider: Oracle
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Q61. LDAP_DIRECTORY_SYSAUTH is set to YES.
Users requiring DBAs access have been granted the sysdba enterprise role in Oracle Internet Directory(OID). SSL has been configure for the database and OLD and the password file has been
configured for the database.
User scott with sysdba privilege tries to connect remotely using this command:
$sqlplusscott/tiger@DB0l As sysdba where DB01 is the net service name.
Which authentication method will be attempted first?
A. authentication by password file
B. authentication by using certificates overSSL
C. authentication by using the Oracle Internet Directory
D. authentication by using the local OS of the database server
Q62. You want to capture column group usage and gather extended statistics for better cardinality estimates for the customers table in theSHschema.
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
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.
* 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
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.
Q63. Automatic Undo Management is enabled for your database. You want a user to retrieve metadata and historical data for a given transaction or for transactions in a given time interval.
Which three are prerequisites to fulfill this requirement?
A. Minimal supplemental logging must be enabled.
B. The database must be running in archivelog mode.
C. Flashback Data Archive must be created and the flashback archive administer system privilege must be granted to the user.
D. The flashback any table privilege must be granted to the user.
E. The select any transaction privilege must be granted to the user.
F. Therecycle binparameter must be set to on.
Q64. 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.
Incorrect: 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.
Q65. Identify three reasons for using a recovery catalog with Recovery Manager (RMAN).
A. to store backup information of multiple databases in one place
B. to restrict the amount of space that is used by backups
C. to maintain a backup for an indefiniteperiod of time by using the KEEPFOREVERclause
D. to store RMAN scripts that are available to any RMAN client that can connect to target databasesregistered in the recovery catalog
E. to automatically delete obsolete backups after a specified period of time
Q66. In the SPFILE, UNDOJTABLESPACEis Set to UNDOTBS.
You rename the undotbs undo tablespace:
ALTER TABLESPACE undotbs RENAME TO undotbs_old;
Which statement is true?
A. The tablespace will be renamed but the data file headers will not be updated.
B. The statement will fail because you cannot rename an undo tablespace.
C. The tablespace will be renamed and all the changes will be logged in the alert log.
D. The tablespace will be renamed and a message written to the alert log indicating that you should change the corresponding initialization parameter.
E. You must set the undo_tablespace parameter to some other tablespace name before renaming undotbs.
Q67. You use RMAN with a recovery catalog to back up your database. The backups and the archived redo log files are backed up to media daily. Because of a media failure, the entire database along with the recovery catalog database is lost.
Examine the steps required to recover the database: 1.Restore an autobackup of the server parameter file. 2.Restore the control file.
3. Start up the database instance in nomount state.
4.Mount the database.
5.Restore the data files.
6.Open the database with the resetlogs option.
7.Recover the data files.
8.Set D3ID for the database.
Identify the required steps in the correct order.
A. 1, 8, 3, 2, 4, 5, 7, 6
B. 8, 1, 3, 2, 4, 5, 7, 6
C. 1, 3, 2, 4, 8, 5, 6, 7
D. 8, 3, 2, 4, 5, 7, 6
E. 8, 1, 3, 2, 4, 5, 6
Q68. 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.
Q69. Your database supports a Decision Support System (DSS) workload that involves the execution of complex queries. Currently, the database is running with peak workload. You want to analyze some of the most resource-intensive statements cached in the library cache.
What must you run to receive recommendations on the efficient use of indexes and materialized views to improve query performance?
A. SQL Performance Analyzer
B. SQL Access Advisor
C. SQL Tuning Advisor
D. Automatic Workload Repository (AWR) report
E. Automatic Database Diagnostic Monitor (ADDM)
Q70. Your database has a table customers that contains the columns cust_name, amt_due, and old_status.
Examine the commands executed and their output:
SQL> ALTER TABLE customers DROP COLUMN old_status;
SQL> UPDATE customers SET amt_due=amt_due+amt_due*1.5 WHERE cust_r.ame='JAMES'
1 row updated.
SQL> SELECT versions_xid AS XID, versior.s_startscr. AS START_SCN,
versions_er.cscn AS END_SCN, versior.s_operatior. AS OPERATION', amt_due
FROM customers VERSIONS BETWEEN SCN MINVALULEAND MAXVALUE WHERE custname='JAMES'.
Why is it that only one update is listed by the Flashback Version Query?
A. Supplemental logging is not enabled for the database.
B. The undo data that existed for versions of rows before the change to the table structure is invalidated.
C. The db_flash3ACK_reteni:on_target parameter is set to a lower value and the undo data pertaining to the first transaction is flushed out.
D. Undo retention guarantee is not enabled.
E. Flashback Data Archive is full after the first update statement.