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Understanding functional and technical aspects of Oracle Database Administration II Exam Number: 1Z0-083
The following will be discussed in the ORACLE 1Z0-083 dumps:
- Oracle Database: Backup and Recovery Workshop
- Configuring and Using RMAN
- Manage CDBs and PDBs
- Backup Strategies and Terminology
- Manage Application PDBs
- Backup and Duplicate
- Oracle Database: Managing Multitenant Architecture Ed 1
- Creating CDBs and Regular PDBs
- Manage Security in Multitenant databases
- Recovery and Flashback
- Upgrading and Transporting CDBs and Regular PDBs
NEW QUESTION 48
Which four are true about RMAN backup sets?
- A. A data file can be split into multiple sections stored in different backup pieces in the same backup set.
- B. A data file can be split into multiple sections stored in different backup sets.
- C. A backup piece can belong to only one backup set.
- D. Blocks from multiple data files can be contained in one backup piece.
- E. A backup set can contain only one backup piece.
- F. A backup set must be written to media.
- G. Blocks from multiple data files can be contained in one backup set.
- H. A backup set must be written to disk.
Answer: B,C,D,H
NEW QUESTION 49
Which two are true about Oracle instance recovery? (Choose three.)
- A. Recovery begins from the beginning of the CURRENT redo log group.
- B. Recovery begins from the last checkpoint position that was calculated by the Database Writer before instance failure.
- C. Recovery reads redo until the end of the redo thread. SMON rolls back any dead transactions, and then the datanase is opened.
- D. Recovery begins from the start of any ACTIVE redo log group or the start of the CURRENT log group if no other group is ACTIV
- E. Recovery begins from the last checkpoint position that was recorded in the control file by the checkpoint process (CKPT).
- F. Recovery reads redo until the end of the redo thread, and then opens the database. SMON then rolls back any dead transactions.
Answer: B,C,F
NEW QUESTION 50
Which three are true about a whole database backup? (Choose three.)
- A. It always includes all data files, the current control file, the server parameter file, and archived redo logs.
- B. It is the only possible backup type for a database in NOARCHIVELOG mode.
- C. It can be created only by using RMAN.
- D. It can consist of either backup sets or image copies.
- E. It can be inconsistent.
- F. It can be consistent.
Answer: A,D,F
NEW QUESTION 51
Which four are true about RMAN backup sets? (Choose four.)
- A. A data file can be split into multiple sections stored in different backup pieces in the same backup set.
- B. A data file can be split into multiple sections stored in different backup sets.
- C. A backup piece can belong to only one backup set.
- D. Blocks from multiple data files can be contained in one backup piece,
- E. A backup set can contain only one backup piece.
- F. A backup set must be written to media.
- G. Blocks from multiple data files can be contained in one backup set,
- H. A backup set must be written to disk.
Answer: B,E,F,G
NEW QUESTION 52
Which two are true about server-generated alerts? (Choose two.)
- A. Stateless alerts can be purged manually from the alert history.
- B. Stateless alerts are automatically cleared.
- C. Stateful alerts must be created by a DBA after resolving the problem.
- D. Stateless alerts can be cleared manually.
- E. Stateful alerts are purged automatically from the alert history.
Answer: A,D
Explanation:
Explanation
Except for the tablespace space usage metric, which is database related, the other metrics are instance related.
Threshold alerts are also referred to as stateful alerts which are automatically cleared when an alert condition clears. Stateful alert appears in DBA_OUTSTANDING_ALERTS and when cleared go to DBA_ALERT_HISTORY. Other server-generated alerts correspond to specific database events such as ORA-* errors, "Snapshot too old" errors, Recovery Area Low on Free Space, Resumable Session Suspended.
These are non threshold based alerts, also referred to as stateless alerts. Stateless alerts go directly to the History table. +++ Most alerts (such as "Out of Space") are cleared automatically when the cause of the problem disappears. However, other alerts (such as generic alert log errors) are sent to you for notification and must be acknowledged by you. After taking the corrective measures, you acknowledge an alert by clearing or purging it. Clearing an alert sends the alert to the Alert History which is accessible from Monitoring sub menu.
Purging an alert removes it from the Alert History.
NEW QUESTION 53
Which two are true about Oracle Flashback features? (Choose two.)
- A. FLASHBACK QUERY can retrieve REDO records from ONLINE and ARCHIVED REDO LOG files.
- B. After a database is restored from flashback logs using the FLASHBACK DATABASE command, it is sometimes rolled forward using redo logs.
- C. FLASHBACK VERSION QUERY can retrieve REDO records from ONLINE and ARCHIVED REDO LOG files.
- D. FLASHBACK DROP can undrop an index when undropping a table.
- E. FLASHBACK TABLE can undrop a column.
Answer: A,C
NEW QUESTION 54
You plan to perform cross-platform PDB transport using XTTS.
Which two are true? (Choose two.)
- A. The source PDB can be in MOUNT or OPEN state.
- B. The source PDB must be in MOUNT state.
- C. A backup of the PDB must exist, taken using the BACKUP command with the TO PLATFORM clause.
- D. The source PDB must not be an application root.
- E. The source and target platforms must have the same endianness.
- F. Automatic conversion of endianness occurs.
Answer: A,E
NEW QUESTION 55
Which two are true about reclaiming space used by Flashback logs in Oracle Database 19c and later releases? (Choose two.)
- A. Space might be reclaimed proactively before space pressure occurs.
- B. Space is always reclaimed proactively before space pressure occurs.
- C. Space is always reclaimed automatically when the retention period for Flashback logs is lowered.
- D. Space is only reclaimed when there is space pressure in the Fast Recovery Area. (FRA)
- E. Space might be reclaimed automatically when the retention period for Flashback logs is lowered.
Answer: D,E
NEW QUESTION 56
Which three are true about Recovery Manager (RMAN) in Oracle Database 19c and later releases? (Choose three.)
- A. It is always possible for RMAN to connect to a pluggable database as a target.
- B. A Virtual Private Catalog used to register a container database can be created in a non-container database.
- C. It is always possible for RMAN to connect to a pluggable database as a target if any RMAN Catalog is used.
- D. A Virtual Private Catalog used to register a container database can be created in a pluggable database.
- E. It is only possible for RMAN to connect to a pluggable database as a target if an RMAN Virtual Private Catalog is used.
- F. A Virtual Private Catalog used to register a container database must be created in a pluggable database.
Answer: A,B,D
NEW QUESTION 57
Examine this configuration:
1. CDB1is a container database.
2. PDB1 and PDB2are pluggable databases in CDB1.
3. PDB1 and PDB2are OPENin READ WRITEmode.
You execute these commands successfully:
Which two are true? (Choose two.)
- A. PDB1is closed.
- B. CDB1is in MOUNT state
- C. CDB1is shut down.
- D. Uncommitted transactions in PDB1have been rolled back.
- E. Uncommitted transactions in CDB1and PDB1have been rolled back.
Answer: A,B
NEW QUESTION 58
While backing up to the Oracle Fast Recovery Area (FRA), you determined the backup is taking too long and suspect a performance bottleneck.
Which three are true about diagnosing and tuning these problems? (Choose three.)
- A. If an RMAN BACKUP VALIDATE command takes noticeably less than an actual backup, then write I/O is a likely bottleneck.
- B. If an RMAN BACKUP VALIDATE command takes roughly the same time as an actual backup, then both read and write I/O are likely bottlenecks.
- C. Data files with a high value in V$BACKUP_SYNC_IO.DISCRETE_BYTES_PER_SECOND are a potential performance bottleneck when synchronous I/O is used.
- D. Data files with a high value in V$BACKUP_ASYNC_IO.SHORT_WAITS are a potential performance bottleneck when asynchronous I/O is used.
- E. If an RMAN BACKUP VALIDATE command takes roughly the same time as an actual backup, then read I/O is a likely bottleneck.
- F. Setting DBWR_IO_SLAVES to a non zero value can improve backup performance when using asynchronous I/O/
- G. Setting DBWR_IO_SLAVES to a non zero value can improve backup performance when using synchronous I/O.
Answer: A,C,G
NEW QUESTION 59
Which two are true about Oracle Database Configuration Assistant (DBCA) templates?
- A. The Data Warehouse template is most suitable when transaction response time is the key criterion.
- B. The General Purpose or Transaction Processing templates are most suitable when concurrency and recoverability are key criteria.
- C. New templates can only be created by modifying an existing user-created template.
- D. Oracle DBCA templates can be used to create new databases and duplicate existing databases.
- E. Oracle DBCA templates can store only logical structure and not database files.
Answer: D,E
NEW QUESTION 60
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:
What is the outcome?
- A. Only the ORCL database instance and the +DATA and +FRA disk groups are started.
- B. Only the ORCL database and the ASM instances are started.
- C. Only the ORCL database instance is started.
- D. The ORCL database, the Oracle ASM instances, the +DATA and +FRA disk groups, and the LISTENER are started.
- E. Only the ORCL database instance, the Oracle ASM instance, and the +DATA and +FRA disk groups are started.
Answer: D
Explanation:
Explanation
https://docs.oracle.com/html/E25494_01/start001.htm
NEW QUESTION 61
Examine this configuration:
CDB1 is a container database.
COMMON_USER_PREFIX is C##.
PDB1 is a pluggable database contained in CDB1.
APP1_ROOT is an application container contained in CDB1.
APP1_PDB1 is an application PDB contained in APP1_ROOT.
You execute these commands successfully:
Which two are true? (Choose two.)
- A. C##_USER1 will have the same privileges and roles granted in all PDBs in CDB1.
- B. APP1_USER1 can have different privileges in each Application PDB contained in APP1_ROOT.
- C. APP1_USER1 can be created in CDB1.
- D. C##_APP_USER1 can be created in CDB1.
- E. APP1_USER1 can be created in PDB1.
- F. P1_USER1 can be created in CDB1.
Answer: A,B
NEW QUESTION 62
Which three are true about an application seed pluggable database (PDB)?
- A. A new application PDB created by cloning an application seed PDB can have an old version of the application installed after cloning completes.
- B. It is not required in an application container.
- C. A new application PDB created by cloning an application seed PDB can have an up-to-date version of the application installed after cloning completes.
- D. It Is automatically synchronized with its application root PDB when an application is upgraded.
- E. It cannot be added to an application container after the application container has already been created.
- F. It cannot be dropped from its application container.
- G. It is automatically synchronized with its application root PDB when an application is installed.
Answer: A,C,G
NEW QUESTION 63
A user complains about poor database performance.
You want to verify if the user's session has waited for certain types of I/O activity. Which view displays all waits waited on by a session at least once?
- A. V$SESSTAT
- B. V$SESSION_WAIT_CLASS
- C. V$SESSION_EVENT
- D. V$SESSION
- E. V$SESSION_WAIT
Answer: C
Explanation:
Reference:
https://docs.oracle.com/cd/E29597_01/server.1111/e16638/instance_tune.htm
NEW QUESTION 64
Which two are true about diagnosing Oracle Database failure situations using Data Recovery Advisor? (Choose two.)
- A. Data Recovery Advisor can be used if a database is closed.
- B. The Data Recovery Advisor CHANGE FAILURE command can be used only to change failure priorities.
- C. A failure can be closed only when it has been repaired.
- D. Using the Data Recovery Advisor LIST FAILURE command always requires that the database for which failures are to be listed is in MOUNT state.
- E. Data Recovery Advisor can proactively check for failures.
Answer: B,E
NEW QUESTION 65
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