(2023) 1Z0-083 Dumps and Practice Test (285 Questions)
Guide (New 2023) Actual Oracle 1Z0-083 Exam Questions
To prepare for the Oracle 1Z1-083 exam, candidates should have extensive experience with Oracle databases and should have a thorough understanding of database administration best practices. They should also take advantage of Oracle's training resources, including classroom and online courses, as well as practice exams and study guides. Candidates should also consider joining the Oracle Certification Community, where they can connect with other professionals preparing for the exam and access valuable study materials and resources.
Oracle 1Z1-083 Exam is a challenging exam that requires a significant amount of preparation. Candidates are expected to have a strong understanding of basic database administration concepts, as well as hands-on experience working with Oracle databases. Candidates are also expected to have a strong understanding of SQL and PL/SQL.
The Oracle 1Z0-083 exam covers a wide range of topics related to Oracle database administration, including backup and recovery, performance tuning, security, and high availability techniques. 1Z0-083 exam is designed to test an individual's ability to perform complex database administration tasks in a highly efficient and effective manner. It is intended for professionals who are responsible for managing and administering enterprise-level databases in a large organization.
NEW QUESTION # 153
Which two are true about the character sets used in an Oracle database? (Choose two.)
- A. Single-byte character sets always use 8-bit encoding schemes.
- B. Single-byte character sets always use 7-bit encoding schemes.
- C. Unicode is the only supported character set for Oracle databases created using Database Configuration Assistant (DBCA).
- D. Single-byte character sets provide better performance than multibyte character sets.
- E. Multibyte character sets allow more efficient space utilization than single byte character sets.
- F. Unicode enables information from any language to be stored using a single character set.
Answer: D,F
Explanation:
Reference:
https://docs.oracle.com/database/121/NLSPG/ch2charset.htm#NLSPG166
NEW QUESTION # 154
You must transport the UNIVERSITYtablespace from one database to another.
The UNIVERSITYtablespace is currently open read/write.
The source and destination platforms have different endian formats.
Examine this list of actions:
1. Make the UNIVERSITY tablespace read-only on the source system.
2. Export the UNIVERSITYtablespace metadata using EXPDP.
3. Convert the UNIVERSITYtablespace data fies to the destination platform format using RMANon the source system.
4. Copy the UNIVERSITYtablespace data files to the destination system.
5. Copy the Data Pump dump set to the destination system.
6. Convert the UNIVERSITYtablespace data files to the destination platform format using RMAN on the destination system.
7. Import the UNIVERSITYtablespace metadata using IMPDP.
8. Make the UNIVERSITY tablespace read/write on the destination system.
Which is the minimum number of actions required, in the correct order, to transport the UNIVERSITY tablespace?
- A. 2, 4, 5, 6, 7
- B. 1, 2, 4, 6, 7, 8
- C. 1, 2, 3, 4, 5, 6, 7, 8
- D. 1, 2, 3, 4, 5, 7, 8
- E. 1, 2, 4, 5, 7, 8
Answer: B
NEW QUESTION # 155
You are managing this configuration:
* CDB1 is a container database.
* PDB1 and PDB2 are two pluggable databases in CDB1.
* USER1.EMP is a table in PDB1 and USER2.DEPT is a table in PDB2.
CDB1 user SYS executes these commands after connecting successfully to PDB2:
Which two are true? (Choose two.)
- A. The insert on USER2.DEPT fails because of the active transaction in the parent container.
- B. The insert on USER2.DEPT is uncommitted.
- C. The inserts on USER1.EMP were committed when the session connected to PDB2.
- D. The insert on USER2.DEPT is a recursive autonomous transaction by the child session and is committed.
- E. The inserts on USER1.EMP remain uncommitted when the session connected to PDB2.
- F. The inserts on USER1.EMP were rolled back when the session connected to PDB2.
- G. The inserts on USER1.EMP were committed when the session inserted a row into USER2.DEPT.
Answer: D,F
NEW QUESTION # 156
Which three are true about Automatic Workload Repository (AWR)? (Choose three.)
- A. By default, AWR snapshots are retained for 7 days.
- B. The taking of AWR snapshots can be disabled.
- C. AWR data is stored in the SYSTEMtablespace.
- D. By default, AWR snapshots are taken every 60 minutes.
- E. Its collection level is determined by the value of the STATISTICS_LEVELdatabase parameter.
Answer: B,D,E
Explanation:
Explanation/Reference: https://docs.oracle.com/cd/B28359_01/server.111/b28320/initparams240.htm#REFRN10214
NEW QUESTION # 157
Which two are true about Oracle Database Configuration Assistant (DBCA) templates?
- A. The General Purpose or Transaction Processing templates are most suitable when concurrency and recoverability are key criteria.
- B. The Data Warehouse template is most suitable when transaction response time is the key criterion.
- C. Oracle DBCA templates can be used to create new databases and duplicate existing databases.
- D. New templates can only be created by modifying an existing user-created template.
- E. Oracle DBCA templates can store only logical structure and not database files.
Answer: C,E
NEW QUESTION # 158
Which three are true about using an RMAN Recovery Catalog with a pluggable database (PDB) target connection in Oracle Database 19c and later releases? (Choose three.)
- A. The target PDB must be registered in a Virtual Private Catalog.
- B. The base catalog must be enabled for Virtual Private Catalog use.
- C. The base catalog owner must give the Virtual Private Catalog access to metadata for one or more PDBs.
- D. The base catalog must be used by RMAN when performing point-in-time recovery for the PDB registered in the Virtual Private Catalog.
- E. The target PDB must be registered in a base catalog.
- F. The target PDB must be registered in both the base catalog and the Virtual Private Catalog.
Answer: A,C,D
NEW QUESTION # 159
While backing up to an SBT channel, you determine that the read phase of your compressed Recovery Manager (RMAN) incremental level 0 backup is a bottleneck.
FORCE LOGGING is enabled for the database.
Which two could improve read performance?
- A. Enable asynchronous disk I/O.
- B. Increase the level of RMAN multiplexing.
- C. Disable FORCE LOGGING for the database.
- D. Increase the size of the database buffer cache.
- E. Increase the size of tape I/O buffers.
Answer: B,C
NEW QUESTION # 160
Choose two. In performance management, which two factors might reduce the ability of an application to scale to a larger number of users?
- A. issuing multiple savepoints during a transaction
- B. poorly written SQL
- C. the number of data files containing extents belonging to tables updated by a transaction
- D. the number of tablespaces containing tables updated by a transaction
- E. poorly trained users who do not commit transactions
Answer: C,E
NEW QUESTION # 161
Which two are true about instance recovery?
- A. Setting fast_start_mttr_target to a higher value reduces instance recovery time by causing the log writer to write more frequently, thereby reducing the number of I/Os needed during instance recovery.
- B. Setting fast_start_mttr_target to a lower value reduces instance recovery time by causing dirty buffers to be written to disk more frequently, thereby reducing the number of I/Os needed during instance recovery.
- C. It is not possible if an archived log is missing.
- D. It is performed automatically while the database remains in mount state. Then the database is opened.
- E. It is performed automatically after the database is opened; however, blocks requiring recovery are not available until they are recovered.
- F. It is performed by the Recovery Writer (rvwr) background process.
Answer: C,F
NEW QUESTION # 162
While backing up to an SBT channel, you determine that the read phase of your compressed Recovery Manager (RMAN) incremental level 0 backup is a bottleneck.
FORCE LOGGING is enabled for the database.
Which two could improve read performance? (Choose two.)
- A. Increase the level of RMAN multiplexing.
- B. Disable FORCE LOGGING for the database.
- C. Increase the size of the database buffer cache.
- D. Enable asynchronous disk I/O.
- E. Increase the size of tape I/O buffers.
Answer: A,D
NEW QUESTION # 163
Choose the best answer. Examine this configuration: 1. CDB1 is a container database. 2. DEFAULT_SHARING is METADATA. 3. APP_ROOT is an application root contained in CDB1. 4. APP_PDB1 is an application PDB contained in APP_ROOT. 5. COMPANYAPP is an application contained in APP_ROOT. 6. EMP is a common table created in APP_ROOT and all its application PDBs, created when version 1.0 of COMPANYAPP was installed. You execute these commands: $ sqlplus sys/ orac1e@localhost:1521/cdb1 as sysdba SQL> ALTER SYSTEM SET DEFAULT_SHARING=DATA; System altered. SQL> ALTER SESSION SET CONTAINER=app_root; Session altered. SQL> ALTER PLUGGABLE DATABASE APPLICATION companyapp BEGIN UPGRADE '1.0' TO '2.0'; pluggable database altered. SQL> ALTER TABLE emp ADD (sal NUMBER NOT NULL) ; Table altered. SQL> ALTER PLUGGABLE DATABASE APPLICATION companyapp END UPGRADE TO '2.0'; Pluggable database altered. SQL> ALTER SESSION SET CONTAINER=app_pdb1; Session altered. SQL> DESC emp; Name Null? Type --------------------------------------------------------------ENO NUMBER ENAME VARCHAR2 (20) SQL> SELECT * FROM emp; ENO ENAME ---------------------------------100 Alan 200 Ben SQL> ALTER PLUGGABLE DATABASE APPLICATION companyapp SYNC; What will be the outcome and why?
- A. It will return an error because the SYNC operation is not allowed when constraints are added to common objects.
- B. It will return an error because EMP is not empty in APP_ROOT.
- C. SAL will be added to APP_PDB1.EMP, with NULLs in columns of existing rows.
- D. SAL will be added to APP_PDB1.EMP, with 0 in columns of existing rows.
- E. It will return an error because EMP.SAL is empty in APP_ROOT.
Answer: B
NEW QUESTION # 164
Which three are true about the SQL Tuning Advisor? (Choose three.)
- A. It checks each query being analyzed for stale statistics.
- B. It only recommends syntactic changes to SQL statements.
- C. It builds SQL profiles for each poorly performing SQL statement to prevent regressions.
- D. It checks each query being analyzed for missing statistics.
- E. It can recommend semantic changes to SQL statements.
- F. It considers all SQL statements being analyzed by the advisor task as a group.
Answer: A,D,E
NEW QUESTION # 165
Which three are true about Oracle Grid Infrastructure for a Standalone Server?
- A. It requires Oracle ASMLib to manage Automatic Storage Managerment (ASMl) disks.
- B. It creates one disk group during installation.
- C. It requires the operating system ORACLE_BASDE environment variable to be predefined before installation.
- D. It includes both Oracle Restart and Oracle Automatic Storage Management (ASM) software.
- E. It requires Oracle ASM Filter Drver (ASMFD) to manage Automatic Storage Managemernt (AsM) disks.
- F. Automatic Storage Management (ASM requires that ars groups OSASM and OSDBA be assigned assecondary groups for its installation owner.
Answer: B,D,F
NEW QUESTION # 166
Choose two. Which two are true about RMAN backups when using a media manager?
- A. A media manager always writes RMAN requested backups to tape.
- B. The media manager layer (MML) routines provided by Oracle support any vendors' media management products.
- C. A media manager is required to create RMAN image copies.
- D. By default, a request for a proxy copy may result in a backup set being created.
- E. A media manager is required to create RMAN proxy copies.
Answer: A,D
NEW QUESTION # 167
Identify three scenarios in which RMAN will use backup sets to perform active database duplication.
- A. when you specify set encryption before the duplicate ... from active database command
- B. when the number of auxiliary channels allocated is equal to or greater than the number of target channels
- C. when you perform active database duplication on a database with flashback disabled
- D. when you perform active database duplication on a database that has readonly tablespaces
- E. when the duplicate ... from active database command contains the section size clause
Answer: A,B,E
NEW QUESTION # 168
Which three are true? (Choose three.)
- A. Application-common Oracle Label Security (OLS) policies cannot be created in an application root outside an install/patch BEGIN-END block.
- B. Virtual Private Database (VPD) policies on objects in an application root are automatically synchronized with all application PDBs contained in the application container.
- C. Unified auditing can be automatically synchronized to all application PDBs in an application container.
- D. Application-common TSDP policies are always container specific.
- E. Application-common OLS policies can be created in an application root inside an install/patch BEGIN-END block.
- F. Application-common Transparent Security Data Protection (TSDP) policies can be created only within an application install/patch BEGIN-END block.
- G. Fine-grained auditing (FGA) policies in an application root are automatically synchronized to all application PDBs contained in the application container.
Answer: A,B,C
NEW QUESTION # 169
In which two situations can you use Database Upgrade Assistant? (Choose two.)
- A. when the operating system (OS) needs to be changed as part of the upgrade
- B. when the target and source database are on the same platform
- C. when multiple pluggable databases in a container database have to be upgraded in a specific sequence
- D. when a character set conversion is required during the upgrade
- E. when the hardware platform needs to be changed as part of the upgrade
Answer: B,C
NEW QUESTION # 170
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