Free Oracle 1Z0-083 Study Guides Exam Questions and Answer
1Z0-083 Exam Dumps, 1Z0-083 Practice Test Questions
Oracle 1Z1-083 exam is ideal for database administrators who wish to validate their advanced skills and knowledge in database administration. 1Z0-083 exam is also suitable for individuals who are looking to advance their careers in database administration by acquiring an industry-recognized certification. Oracle Database Administration II certification provides a competitive edge over other candidates in the job market and can lead to higher salaries and better job opportunities.
NEW QUESTION # 138
Which two are direct benefits of the multiprocess, multithreaded architecture of Oracle Database
12c when it is enabled?
- A. Reduced physical I/O
- B. Improved Serial Execution performance
- C. Reduced logical I/O
- D. Reduced CPU utilization
- E. Reduced virtual memory utilization
Answer: D,E
NEW QUESTION # 139
Which three are true about Automatic Workload Repository (AWR) snapshots?
- A. They are always created manually.
- B. They can be retained forever.
- C. They are always created automatically.
- D. They are generated if STATISTICS_LEVEL is set to BASIC.
- E. They are generated if STATISTICS_LEVEL is set to TYPICAL.
- F. They are generated if STATISTICS_LEVEL is set to ALL.
Answer: B,E,F
NEW QUESTION # 140
Examine this configuration:
1. The orcl database data files are in Automatic Storage Management (Oracle ASM) disk group +data.
2. orcl uses disk group +fra for the Fast Recovery Area.
3. listener is the listener for orcl.
4. The database, listener, ASM instance, and ASM disk groups are managed by Oracle Restart.
5. All components are currently shut down.
You execute this command:
$ srvctl start database -d ORCL
What is the outcome?
- A. Only the orcl database instance is started.
- B. Only the orcl database and the ASM instances are started.
- C. Only the orcl database instance, the Oracle ASM instance, and the +data and +fra disk groups are started.
- D. Only the orcl database instance and the +data and +fra disk groups are started.
- E. The ORCL database, the Oracle ASM instances, the +data and +fra disk groups, and the listener are started.
Answer: E
NEW QUESTION # 141
Choose three. Which three are true about backing up the control file?
- A. It can get backed up automatically as a binary copy.
- B. It gets backed up automatically by RMAN as a trace file containing SQL statements for control file re-creation when a database backup occurs.
- C. It can be backed up manually as a binary copy.
- D. It cannot be backed up manually as a binary copy.
- E. It gets backed up automatically by RMAN when the BACKUP SPFILE command is used.
- F. It can be backed up manually as a trace file containing SQL statements for control file recreation.
Answer: A,C,F
NEW QUESTION # 142
Which three are true about performing an Oracle Database install on Linux?
- A. The Oracle Preinstallation RPM must be used to configure the Oracle database installation owner, the Oracle Inventory group, and an Oracle administrative privileges group.
- B. The Oracle PreinstallationRPMcan be used to configure the Oracle database installation owner, the Oracle Inventory group, and an Oracle administrative privileges group.
- C. The Oracle database administrator must be granted access to the root operating system account to run root privileged scripts.
- D. It allows you to select the languages supported by the Oracle database server.
- E. It can be done before installing Grid Infrastructure for a Standalone Server.
- F. It can be done after installing Grid Infrastructure for a Standalone Server.
- G. The runfixup.sh script can install missing RPMs.
Answer: A,D,E
NEW QUESTION # 143
Which two are true about gathering optimizer statistics? (Choose two.)
- A. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics in all open pluggable databases (PDBs)
- B. System statistics can be gathered only while connected to CDB$ROOT.
- C. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics only in CDB$ROOT.
- D. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to a PDB opened in read/write mode gathers object statistics for that PDB.
- E. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics in all open PDBs except PDB$SEED.
Answer: A,D
Explanation:
https://mikedietrichde.com/2016/10/21/gather-fixed-objects-stats-in-pdbs-as-well/#:~:text=Yes%2C%20you'll%20have%20to,independently%20from%20the%20CDB%24ROOT.&text=Oracle%20Database%20automatically%20gathers%20fixed,Automatic%20Optimizer%20Statistics%20Collection%E2%80%9C) .
Reference:
https://docs.oracle.com/en/database/oracle/oracle-database/20/arpls/DBMS_STATS.html
NEW QUESTION # 144
Which four are true about RMAN backup sets? (Choose four.)
- A. A backup set must be written to disk.
- B. Blocks from multiple data files can be contained in one backup piece,
- C. A backup set can contain only one backup piece.
- D. A backup piece can belong to only one backup set.
- E. A data file can be split into multiple sections stored in different backup sets.
- F. A backup set must be written to media.
- G. A data file can be split into multiple sections stored in different backup pieces in the same backup set.
- H. Blocks from multiple data files can be contained in one backup set,
Answer: C,E,F,H
NEW QUESTION # 145
Which two are true about diagnosing Oracle Database failure situations using Data Recovery Advisor? (Choose two.)
- A. The Data Recovery Advisor CHANGE FAILURE command can be used only to change failure priorities.
- B. Data Recovery Advisor can be used if a database is closed.
- C. A failure can be closed only when it has been repaired.
- D. Data Recovery Advisor can proactively check for failures.
- E. Using the Data Recovery Advisor LIST FAILURE command always requires that the database for which failures are to be listed is in MOUNT state.
Answer: B,D
Explanation:
A is NOT correct - DB can be even NOT MOUNTED.
B is NOT correct - you can close it whenever you want, eventually new check will find the failure again.
C has to be CORRECT despite it is not fully clear, anyway Recovery Advisor can be used when database is even NOT mounted, hence it is CLOSED while instance is STARTED.
D is NOT correct because of ONLY word. Change Failure can CLOSE or CHANGE PRIORITY.
E is CORRECT - Data Recovery Advisor can potentially detect, analyze, and repair data failures BEFORE a database process discovers the corruption and signals an error. Early warnings help limit damage caused by corruption.
The health assessment is known as a data integrity check and can be invoked reactively or PROACTIVELY.
NEW QUESTION # 146
Which two are true about RMAN Multisection backups when a very large data file is divided into four sections?
(Choose two.)
- A. Each of the file sections must be processed serially.
- B. The four sections must be image copies.
- C. The four sections must be contained in backup sets.
- D. The four sections can be created in parallel.
- E. The four sections can be created serially.
Answer: C,D
NEW QUESTION # 147
Which two are true about flashback features in Oracle Database 19c and later releases? (Choose two.)
- A. Flashback logs are monitored and proactively deleted when beyond the retention period defined in DB_FLASHBACK_RETENTION_TARGET only after there is space pressure.
- B. Flashback logs areautomatically purged when DB_FLASHBACK_RETENTION_TARGET is set lower than the time they have already been retained.
- C. Flashback logs are monitored and proactively deleted when beyond the retention period defined in DB_FLASHBACK_RETENTION_TARGET before there is space pressure.
- D. Flashback logs are monitored for being older than the retentionperiod defined in DB_FLASHBACK_RETENTION_TARGET and can be deleted by an administrator written event trigger.
- E. Flashback logs are automatically purged whenever the value of
DB_FLASHBACK_RETENTION_TARGET is changed.
Answer: A,E
NEW QUESTION # 148
Which three RMAN persistent settings can be set explicitly?
- A. archive log backup duplexing
- B. redo log backup duplexing
- C. SPFILE backup duplexing
- D. archive log deletion policy
- E. image copy duplexing
- F. control file auto backup formats
Answer: A,D,F
NEW QUESTION # 149
You enable Flashback Data Archive for a table for which you want to track and save all transactions for four years. After some time, the requirement changes for keeping transactions from four to two years. You execute the following command to change the requirement:
SQL> ALTER FLASHBACK ARCHIVE fdal MODIFY RETENTION 2 YEAR;
What is the outcome?
- A. All historical data older than two years, if any, is purged from the flashback archive FDA1.
- B. An error is returned because the retention period cannot be reduced.
- C. All historical data older than two years, if any, is archived to flashback logs and the flashback archive is set to new retention time.
- D. All the flashback data archives are purged and the subsequently created flashback archives are maintained for two years
Answer: A
NEW QUESTION # 150
Which two are true about SQL Performance Analyzer (SPA)? (Choose two.)
- A. It offers fine-grained analysis of all the SQL statements in the analysis task as a group.
- B. SQL statements that were originally run concurrently are run concurrently by SPA.
- C. It provides before and after execution statistics for each SQL statement in the analysis task
- D. It is integrated with the SQL Access Advisor.
- E. It predicts the impact of system changes on SQL workload response time.
Answer: A,E
NEW QUESTION # 151
Examine these queries and their output:
After a system crash, an instance restart and an attempted opening of the PDBs result in:
Which two are true?
- A. Data file 24 can be recovered while PDB2 is opened.
- B. Data file 24 can be recovered while CDB$ROOTand PDB$SEED are opened.
- C. Data file 24 must be recovered while PDB2 is closed.
- D. Data file 24 must be recovered while the CDB is opened.
- E. Data file 24 cannot be recovered while the CDB is opened.
Answer: A,D
NEW QUESTION # 152
Which three are true about actions that can or cannot be performed by users with the SYSBACKUP privilege? (Choose three.)
- A. They cannot create restore points.
- B. They can view data from any data dictionary view or dynamic performance view.
- C. They can drop any tablespace.
- D. They can create any table.
- E. They cannot drop tablespaces.
- F. They can view data from any user-defined tables.
Answer: B,C,D
Explanation:
https://docs.oracle.com/en/database/oracle/oracle-database/19/dbseg/configuring-privilege-and- role-authorization.html#GUID-BF12E37F-4606-42BB-B8B6-4CDC5A870EE7
NEW QUESTION # 153
Which two are true about the Program Global Area (PGA) and its management in an Oracle database instance? (Choose two.)
- A. The entire PGA is located in the System Global Area (SGA) when using shared servers.
- B. The private SQL area (UGA) is located in the System Global Area (SGA) when using shared servers.
- C. The private SQL area (UGA) is located in the System Global Area (SGA) when using dedicated servers.
- D. Sorts and Hash Joins use PGA memory.
- E. PGA_AGGREGATE_LIMIT is a hard limit on the PGA size for any one session.
Answer: B,D
Explanation:
https://docs.oracle.com/en/database/oracle/oracle-database/19/cncpt/memory-architecture.html#GUID-913335DF-050A-479A-A653-68A064DCCA41
NEW QUESTION # 154
Which three are true about the FLASHBACK DATABASE feature? (Choose three.)
- A. FLASHBACK LOGS are archived after a log switch.
- B. FLASHBACK DATABASE only uses FLASHBACK LOGS to get the database to the desired flashback time.
- C. It requires that the target database be in ARCHIVELOG mode.
- D. A database can be flashed back using SQL*PLUS.
- E. Queries and DML have the same FLASHBACK LOG overhead when flashback is enabled for a database.
- F. It always generates REDO and UNDO.
Answer: C,D,F
Explanation:
A is wrong - they are never archived.
C is wrong - 19c docs: Queries do not change data and thus do not contribute to logging activity for Flashback Database.
D is wrong - according to documentation and my practice some ARCHIVE LOGs are required too.
NEW QUESTION # 155
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