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2021 Nov 1z0-067 exam engine
Q1. Which two statements are true about a common user?
A. A common user connected to a pluggable database (PDB) can exercise privileges across other PDBs.
B. A common user with the create user privilege can create other common users, as well as local users.
C. A common user can be granted only a common role.
D. A common user can have a local schema in a PDB.
E. A common user always uses the global temporary tablespace that is defined at the CDB level as the default temporary tablespace.
Q2. You restore and recover your database to a new host by using an existing RMAN open database backup.
Which step must you perform next?
A. Execute catproc.sqi to recompile invalid PL/SQL modules.
B. Open the database with the resetlogs option.
C. Set a new database identifier (DBID) for the newly restored database.
D. Use the RMAN set newname and switch commands to switch to new files.
Q3. The environmental variable oracle_Base is set to /u01/app/oracle and oracle_home is set to /u01/app/oracle/product/12.1.0/db 1.
You want to check the diagnostic files created as part of the Automatic Diagnostic Repository (ADR). Examine the initialization parameters set in your database.
audit_file_deststring/u01/app/oracle/admin/eml2rep/adump background_dump_deststring core_dump_deststring db_create_file_deststring db_recovery_file_deststring/u01/app/oracle/fast_recovery_area diagnostic_deststring
What is the location of the ADR base?
A. It is set to/u01/app/oracle/product:/12.1.0/db_1/log.
B. It is set to /u01/app/oracle/admin/enl2r&p/adump.
C. It is set to /u01/app/oracle.
D. It is setto /u01/app/oracle/flash_recovery_area.
Q4. Examine the commands:
SQL> ALTER SESSION SET RECYCLBIN = ON;
SQL> DROP TABLE emp; --(First EMP table)
SQL> CREATE TABLE emp (id NUMBER CONSTRAINT emp_id_idx PRIMARY KEY, name VARCHAR2 (15), salary NUMBER(7,2) );
You then execute multiple INSERT statements to insert rows into EMP table and drop the table again:
SQL> DROP TABLE emp; -- (Second EMP table) Table dropped.
SQL> FLASHBACK TABLE emp TO BEFORE DROP;
Which statement is true about the FLASHBACK command?
A. It recovers the structure, data, and indexes of the first emp table.
B. It recovers only the structure of the second emp table.
C. It returns an error because two tables with the same name exist in the recycle bin.
D. It recovers the structure, data, and indexes of the second emp table.
Q5. For which two requirements would you use the Database Resource Manager?
A. limiting the CPU used per database call
B. specifying the maximum number of concurrent sessions allowed for a user
C. specifying the amount of private space a session can allocate in the shared pool of the SGA
D. limiting the degree of parallelism of operations performed by a user or group of users
E. specifying an idle time limit that applies to sessions that are idle and blocking other sessions
Down to date 1z0-067 testing engine:
Q6. You issue the RMAN commands:
RMAN> CONFIGURE DEFAULT DEVICE TYPE TO disk;
RKAN> CONFIGURE DEVICE TYPE DISK BACKUP TYPE TO COPY;
RMAN>CONFIGURE CONTROLFILE AUTOBACKUPON;
RMAN> BACKUP DATABASE PLUS ARCHIVELOG DELETE INPUT;
Which three tasks are performed by the BACKUP DATABASEcommand?
A. switching the online redo log file
B. backing up all data files as image copies and archive log files, and deleting those archive log files
C. backing up only the used blocks in the data files
D. backing up all used and unused blocks in the data files
E. backing up all archived log files and marking them as obsolete
Q7. You noticeperformancedegradation in your production Oracle 12c database. You want toknow what caused this performance difference.
Which method or feature should you use?
A. Database Replay
B. Automatic Database Diagnostic Monitor (ADDM) Compare Period report
C. Active Session History (ASH) report
D. SQL Performance Analyzer
Q8. Examine the parameters for your database instance:
Which three statements are true about the process of automatic optimization by using statistics feedback?
A. The optimizer automatically changes a plan during subsequent execution of a SQL statement if there is a huge difference in optimizer estimates and execution statistics.
B. The optimizer can re optimize a query only once using cardinality feedback.
C. The optimizer enables monitoring for cardinality feedback after the first execution of a query.
D. The optimizer does not monitor cardinality feedback if dynamic sampling and multicolumn statistics are enabled.
E. After the optimizer identifies a query as a re-optimization candidate, statistics collected by the collectors are submitted to the optimizer.
Explanation: C: During the first execution of a SQL statement, an execution plan is generated as usual.
D: if multi-column statistics are not present for the relevant combination of columns, the optimizer can fall back on cardinality feedback. (not B)* Cardinality feedback. This feature, enabled by default in 11.2, is intended to improve plans for repeated executions.
Dynamic sampling or multi-column statistics allow the optimizer to more accurately estimate selectivity of conjunctive predicates.
* OPTIMIZER_DYNAMIC_SAMPLING controls the level of dynamic sampling performed by the optimizer. Range of values. 0 to 10
Cardinality feedback was introduced in Oracle Database 11gR2. The purpose of this feature is to automatically improve plans for queries that are executed repeatedly, for which the optimizer does not estimate cardinalities in the plan properly. The optimizer may misestimate cardinalities for a variety of reasons, such as missing or inaccurate statistics, or complex predicates. Whatever the reason for the misestimate, cardinality feedback may be able to help.
Q9. Examine the output:
SQL > ARCHIVE LOGLIST
Database log modeArchive Mode Automatic archivalEnabled Archive DestinationUSE_DB_RECOVERY_FILE_DEST Oldest online log sequence376 Next log sequence to archive378 Current log sequence378 Which three types of files are automatically placed in the fast recovery area?
A. Flashback data archives (FDA)
B. Archived redo log files
C. Control file autobackups
D. Server parameter file (SPFILE)
E. Recovery Manager (RMAN) backup pieces
Q10. Automatic Shared Memory Management (ASMm) is enabled for your database instance, but parameters for the managed components are not defined.
You execute this command: SQL> ALTER SYSTEM SET DB_CACHE_SIZE = 100M;
Which statement is true?
A. The minimum size for the standard buffer cache is 100 MB.
B. The maximum size for the standard buffer cache is 100 MB.
C. The minimum space guaranteed in the buffer cache for any server process is 100 MB.
D. The maximum space in the buffer cache that can be released for dynamic distribution is 100 MB.
E. The minimum size for all buffer caches is 100 MB.