Prepare 1Z0-182 Question Answers Free Update With 100% Exam Passing Guarantee [2025]
Dumps Real Oracle 1Z0-182 Exam Questions [Updated 2025]
NEW QUESTION # 12
Which three statements are true about the tools used to configure Oracle Net Services?
- A. Enterprise Manager Cloud Control can be used to centrally configure listeners on any managed database server.
- B. The Oracle Net Configuration Assistant is only used when running the Oracle installer.
- C. Enterprise Manager Cloud Control can be used to centrally configure net service names for any database server target.
- D. Oracle Net Manager can be used to centrally configure listeners on any database server target.
- E. The lsnrctl utility requires a listener.ora file to exist before it is started.
- F. Oracle Net Manager can be used to locally configure naming methods on a database server.
Answer: A,C,F
Explanation:
A .False. Net Manager is local, not centralized.
B .False. NetCA can run standalone.
C .True. EMCC manages service names centrally.
D .True. EMCC configures listeners on managed targets.
E .False. lsnrctl starts a default listener if no listener.ora exists.
F .True. Net Manager configures local tnsnames.ora.
NEW QUESTION # 13
You execute this command: CREATE BIGFILE TABLESPACE big_tbs DATAFILE '/u01/oracle/data/big_f1.dbf' SIZE 20G; Sufficient storage is available in filesystem /u01. Which two statements are true about the BIG_TBS tablespace?
- A. AUTOEXTEND is possible for the datafile.
- B. It must be bigger than the largest SMALLFILE tablespace.
- C. It will be a dictionary-managed tablespace by default.
- D. Additional data files may not be added.
- E. It will always have a 32K blocksize.
Answer: A,D
Explanation:
A .False. LMT is default in 23ai.
B .True. Bigfile tablespaces have one data file only.
C .True. AUTOEXTEND works with bigfile data files.
D .False. Block size defaults to DB_BLOCK_SIZE (e.g., 8K).
E .False. No size comparison requirement.
NEW QUESTION # 14
Which three relationships between instances and Oracle databases are possible without using Multi-tenant?
- A. One instance on one server mounting and opening multiple databases.
- B. Two or more instances on separate servers all mounting and opening the same database.
- C. One instance on one server mounting and opening one database.
- D. One instance on one server mounting multiple databases.
- E. One instance on one server that has no database mounted.
Answer: B,C,E
Explanation:
A .False. One instance can't mount multiple DBs without multitenant.
B .True. RAC allows multiple instances to share one DB.
C .False. Same as A; not possible without CDB.
D .True. An instance can start in NOMOUNT with no DB.
E .True. Standard single-instance configuration.
NEW QUESTION # 15
Which two AWR-based tools listed below are part of Oracle Database self-tuning components?
- A. Automatic Application Tracing used to collect High-Load SQL statements and statistics.
- B. Automatic population of performance views (V$ views) from statistical data stored in AWR repository and using Automatic Database Diagnostic.
- C. Automatic Diagnostic Collector used to capture and store database errors and hung analysis.
- D. Automatic capture of statistical information from the SGA and storing it in the AWR using Automatic Database Diagnostic.
- E. ADDM, a server-based expert that reviews database performance statistics captured by Snapshots to identify potential problems before system performance degrades noticeably.
- F. Automatic Application Tracing used to collect High-Load SQL statements and statistics.
Answer: D,E
Explanation:
False. No "Automatic Application Tracing" exists as an AWR tool. SQL tracing (e.g., DBMS_MONITOR) is manual, and high-load SQL is captured by AWR indirectly via V$SQL snapshots, not a distinct tracing tool.
Why Incorrect:Conflates manual tracing with AWR's passive collection.
Explanation:
The Automatic Workload Repository (AWR) is a cornerstone of Oracle's self-tuning capabilities, collecting and storing performance statistics for analysis. Let's dissect each option:
A : Automatic capture of statistical information from the SGA and storing it in the AWR using Automatic Database Diagnostic.
True. AWR automatically captures statistics (e.g., wait events, SQL stats) from the System Global Area (SGA) via the MMON (Manageability Monitor) process, storing them in the AWR repository (in SYSAUX). This is part of the Automatic Database Diagnostic Monitor (ADDM) framework, though "Automatic Database Diagnostic" likely refers to this broader mechanism.
Mechanics:Snapshots are taken hourly by default (configurable via DBMS_WORKLOAD_REPOSITORY.MODIFY_SNAPSHOT_SETTINGS), persisting data like DBA_HIST_SYSSTAT for self-tuning analysis.
Practical Use:Enables historical performance tracking, feeding tools like ADDM and SQL Tuning Advisor.
Edge Case:If STATISTICS_LEVEL=BASIC, AWR collection is disabled, haltingself-tuning.
Historical Note:Introduced in 10g, enhanced in 23ai for finer granularity.
B : ADDM, a server-based expert that reviews database performance statistics captured by Snapshots to identify potential problems before system performance degrades noticeably.
True. The Automatic Database Diagnostic Monitor (ADDM) analyzes AWR snapshots to proactively detect issues (e.g., high CPU usage, I/O bottlenecks) and recommend fixes. It runs automatically after each snapshot in maintenance windows.
Mechanics:ADDM uses DBA_ADVISOR_FINDINGS to log issues, leveraging AWR data like DBA_HIST_SQLSTAT. Example: It might suggest adding an index for a slow query.
Practical Use:Prevents performance degradation in production systems by catching trends early.
Edge Case:Limited by snapshot frequency; real-time issues may need manual intervention.
C : Automatic Diagnostic Collector used to capture and store database errors and hung analysis.
False. No such tool exists as an "Automatic Diagnostic Collector" in AWR context. This likely confuses the Incident Packaging Service (IPS) or ADR (Automatic Diagnostic Repository), which handles errors but isn't AWR-based or self-tuning.
Why Incorrect:ADR collects trace files and logs, not AWR statistics, and isn't part of self-tuning.
D : Automatic population of performance views (V$ views) from statistical data stored in AWR repository and using Automatic Database Diagnostic.
False. V$ views (e.g., V$SESSION) are real-time memory structures in the SGA, not populated from AWR, which is historical (e.g., DBA_HIST_*). AWR doesn't back-feed V$ views; the reverse occurs via snapshots.
Why Incorrect:Misunderstands the data flow; AWR is a sink, not a source for V$ views.
NEW QUESTION # 16
Which two statements are true about User Authentication in an Oracle Database?
- A. Password File authentication must be used for system-privileged administrative users.
- B. REMOTE_LOGIN_PASSWORDFILE must be set to EXCLUSIVE to permit password changes for system-privileged administrative users.
- C. Password authentication must be used for system-privileged administrative users.
- D. Password File authentication is supported for any type of database user.
- E. Operating System authentication may be used for system-privileged administrative users.
Answer: A,E
Explanation:
User authentication in Oracle 23ai determines how users (especially administrative ones) connect to the database. Let's analyze each option with extensive detail:
A . Operating System authentication may be used for system-privileged administrative users.
True. OS authentication allows users mapped to OS accounts (e.g., ops$oracle) to connect without a password, often used for administrative users like SYS or SYSTEM. This is configured by creating an externally authenticated user (e.g., CREATE USER "OPS$ORACLE" IDENTIFIED EXTERNALLY) and relies on the OS to verify identity.
Mechanics:When a user logs in via sqlplus / as sysdba, Oracle checks the OS user against the dba group (Unix) or ORA_DBA (Windows). If matched, no password is needed, leveraging OS security.
Practical Use:Common for DBAs managing local instances, reducing password management overhead.
Edge Case:Requires REMOTE_LOGIN_PASSWORDFILE=NONE for exclusive OS auth, but this isn't mandatory if a password file exists alongside.
Historical Note:Introduced in early Oracle versions, this remains a robust option in 23ai for local admin access.
B . Password authentication must be used for system-privileged administrative users.
False. "Must" is incorrect; password authentication (e.g., sqlplus sys/password) is an option, not a requirement. OS authentication or password file authentication can also be used for users like SYS. This option overstates the necessity of password-based login.
Why Incorrect:Oracle's flexibility allows multiple methods, contradicting the absolute phrasing here.
C . Password File authentication is supported for any type of database user.
False. Password file authentication is restricted to users with SYSDBA, SYSOPER, or similar system privileges (e.g., SYSBACKUP). Regular users (e.g., HR) can't use the password file (orapw<sid>); they rely on database authentication (passwords stored in the DB) or external methods.
Mechanics:The password file stores hashed credentials for privileged users, checked during remote AS SYSDBA logins.
Why Incorrect:Extending this to "any user" ignores Oracle's security model limiting password file usage.
D . REMOTE_LOGIN_PASSWORDFILE must be set to EXCLUSIVE to permit password changes for system-privileged administrative users.
False. REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE allows a dedicated password file for one instance, enabling password changes via ALTER USER SYS IDENTIFIED BY newpass. However, SHARED mode also permits changes for SYS, though not for other users added to the file. The "must" overstates the requirement; it's sufficient, not necessary.
Mechanics:EXCLUSIVE locks the file to one DB, while SHARED allows multiple DBs to use it, with restrictions on non-SYS users.
E . Password File authentication must be used for system-privileged administrative users.
True. For remote administrative access (e.g., sqlplus sys/password@orcl as sysdba), a password file is mandatory when REMOTE_LOGIN_PASSWORDFILE is EXCLUSIVE or SHARED. Local OS authentication is an alternative, but for network-based admin tasks, the password file is required, making this statement true in that context.
Mechanics:Set via orapwd (e.g., orapwd file=orapworcl password=oracle entries=10), enabling remote SYSDBA logins.
Edge Case:If REMOTE_LOGIN_PASSWORDFILE=NONE, only OS auth works locally, but this isn't the default or typical setup.
NEW QUESTION # 17
Which two statements are true about the configuration and use of UNDO?
- A. Unexpired UNDO is always retained.
- B. UNDO_RETENTION specifies for how long Oracle attempts to keep unexpired UNDO.
- C. UNDO_RETENTION specifies how long all types of UNDO are retained.
- D. Active UNDO is always retained.
- E. UNDO_RETENTION specifies for how long Oracle attempts to keep expired and unconsumed UNDO.
Answer: B,D
Explanation:
A .True. Active (in-use) UNDO is never overwritten.
B .False. Unexpired UNDO can be reused if space is needed.
C .False. Applies to unexpired, not expired UNDO.
D .False. Only unexpired UNDO is targeted.
E .True. UNDO_RETENTION sets the retention goal for unexpired UNDO.
NEW QUESTION # 18
Which two tasks can be performed in the NOMOUNT state?
- A. Renaming data files.
- B. Creating a database.
- C. Enabling online redo log archiving.
- D. Re-creating control files.
- E. Full database recovery.
Answer: B,D
Explanation:
A .False. Requires MOUNT to access data files.
B .False. Requires MOUNT for redo logs.
C .True. CREATE DATABASE runs in NOMOUNT.
D .True. CREATE CONTROLFILE is possible.
E .False. Recovery needs MOUNT or OPEN.
NEW QUESTION # 19
Which two statements are true about trace files produced by the Oracle Database server?
- A. They can be written by background processes to a file system.
- B. All trace files contain error information that requires contacting Oracle Support.
- C. They can be written by server processes to a file system.
- D. They can be written by server processes to the Fast Recovery Area (FRA).
- E. Trace file names are based on the database name concatenated with a sequential number.
Answer: A,C
Explanation:
A .False. Not all trace files indicate errors; some log normal activity.
B .True. Server processes write traces (e.g., ora_s000_123.trc) to the file system.
C .True. Background processes (e.g., ora_lgwr_123.trc) also write traces.
D .False. Names include process type and PID, not just DB name and sequence.
E .False. Traces go to DIAGNOSTIC_DEST, not necessarily FRA unless configured there.
NEW QUESTION # 20
What memory structure caches the data dictionary providing access to all database user processes?
- A. The Streams Pool
- B. The Shared Pool
- C. The Large Pool
- D. The Java Pool
Answer: B
Explanation:
D .True. The Shared Pool caches data dictionary metadata (e.g., table definitions) in the Library Cache and Dictionary Cache, accessible to all processes. Others serve different purposes (e.g., Large Pool for backups).
NEW QUESTION # 21
Which three tasks are part of the predefined Automated Maintenance Tasks?
- A. Automatic notification tasks.
- B. Automatic segment and segment statistics advisor tasks.
- C. Automatic Backups of the database system files.
- D. Automatic SQL Plan Management advisor tasks.
- E. Automatic error and failure log collection tasks.
- F. Automatic Optimizer Statistics Collection.
Answer: B,D,F
Explanation:
A .False. Backups are via RMAN, not AMTs.
B .True. Stats collection is an AMT.
C .False. Error logging isn't an AMT.
D .True. SPM tasks are included.
E .False. Notifications aren't AMTs.
F .True. Segment Advisor is an AMT.
NEW QUESTION # 22
Which three statements are true about row chaining and row migration done by Oracle database block space management?
- A. Update statements can result in one or more chained rows.
- B. Insert statements can result in a migrated row.
- C. Update statements can result in one or more migrated rows.
- D. Row pieces of a chained row must always reside in different blocks.
- E. A migrated row results in an update to any index on the table to point the row ID in the index to the row's new location.
Answer: A,C,E
Explanation:
A .True. Migration updates index ROWIDs.
B .True. Updates can migrate rows if space is insufficient.
C .True. Large updates can chain rows across blocks.
D .False. Chained rows may span blocks but aren't required to.
E .False. Inserts don't migrate; they chain if too large initially.
NEW QUESTION # 23
What is the result of the following command? ALTER PLUGGABLE DATABASE PDB1 DISCARD STATE;
- A. It should be used whenever PDB1 open mode needs to be changed.
- B. PDB1 is reverted to its default properties, which includes not to automatically open after a CDB restart.
- C. It is unnecessary if the PDB is in the process of being upgraded.
- D. PDB1 is reverted to its default properties, which includes automatic opening after a CDB restart.
Answer: B
Explanation:
A .False. DISCARD STATE isn't tied to upgrades; it resets PDB startup behavior.
B .True. Discards saved state, reverting PDB1 to manual open mode (not auto-open) after CDB restart.
C .False. Default is not auto-open; it's manual unless explicitly saved as OPEN.
D .False. Used for state management, not general mode changes (e.g., OPEN READ WRITE).
NEW QUESTION # 24
What are Oracle Database Metrics?
- A. Oracle Database Metrics are a set of statistics built in Oracle Enterprise Manager Cloud Control and used for automation.
- B. Oracle Database Metrics are part of the Oracle Database Notification system to email information about major database events.
- C. Oracle Database Metrics are a set of measured statistics per unit of time (per second), transaction, or sessions that are used to evaluate performance.
- D. Oracle Database Metrics monitor performance using thresholds to generate alerts.
- E. Oracle Database Metrics are part of Oracle Enterprise Manager Cloud Control's Notification system used to email alerts.
Answer: C,D
Explanation:
A .True. Metrics (e.g., V$SYSMETRIC) use thresholds for alerts.
B .False. Metrics aren't tied to email notifications directly.
C .True. Metrics measure rates (e.g., IOPS, transactions/sec).
D .False. EMCC uses metrics, but they're DB-level, not EM-specific.
E .False. Metrics exist in the DB, not just EMCC.
NEW QUESTION # 25
Which of the following statements is true about external tables?
- A. They describe how the external table layer presents data to the server.
- B. They describe data stored in the database.
- C. They describe how data is stored in the external source.
- D. They are read/write tables.
Answer: A
Explanation:
A .False. External tables are read-only.
B .True. Defines how external data (e.g., CSV) is mapped to SQL.
C .False. Data is external, not in the DB.
D .False. Storage is external; Oracle doesn't define it.
NEW QUESTION # 26
Which four statements are true about the Oracle Server architecture?
- A. The buffer cache and the redo log buffer are held in the large pool.
- B. A connection represents the state of a user's login to an instance.
- C. A person or program can have more than one session with an instance by logging in with the same user.
- D. A session represents the state of a user's login to an instance.
- E. A person or program can have more than one session with an instance by logging in with different users.
- F. Each server process or background process has their own Program Global Area (PGA).
Answer: C,D,E,F
Explanation:
A .True. Multiple sessions with different users are possible.
B .False. Buffer cache and redo log buffer are in SGA, not large pool.
C .True. Session tracks login state.
D .True. Each process has its own PGA.
E .False. Connection is the network link; session is the state.
F .True. Same user can have multiple sessions (e.g., via different terminals).
NEW QUESTION # 27
Which three Oracle database space management features will work with both Dictionary and Locally managed tablespaces?
- A. Oracle Managed Files (OMF).
- B. Online table segment shrink.
- C. Automatic data file extension (AUTOEXTEND).
- D. Online index segment shrink.
- E. Capacity planning growth reports based on historical data in the Automatic Workload Repository (AWR).
Answer: A,C,E
Explanation:
Dictionary-managed tablespaces (DMTs) use the data dictionary for extent management, whilelocally managed tablespaces (LMTs) use bitmaps. Let's evaluate compatibility:
A . Capacity planning growth reports based on historical data in the Automatic Workload Repository (AWR).
True. AWR tracks space usage (e.g., DBA_HIST_TBSPC_SPACE_USAGE) regardless of tablespace type, enabling growth reports for both DMTs and LMTs.
Mechanics:MMON collects metrics like segment growth, stored in SYSAUX, accessible via EM or scripts.
Practical Use:Helps predict when to add data files, universal across management types.
B . Online table segment shrink.
False. ALTER TABLE ... SHRINK SPACE requires LMTs with Automatic Segment Space Management (ASSM), unavailable in DMTs, which lack bitmap-based free space tracking.
Why Incorrect:DMTs use freelists, incompatible with shrink operations.
C . Online index segment shrink.
False. Like tables, ALTER INDEX ... SHRINK SPACE requires LMTs with ASSM, not supported in DMTs.
Why Incorrect:Same limitation as B; DMTs can't compact online.
D . Oracle Managed Files (OMF).
True. OMF automates file naming and placement (via DB_CREATE_FILE_DEST) for both DMTs and LMTs, agnostic to extent management.
Mechanics:Example: CREATE TABLESPACE ts1; creates an OMF file in either type.
Edge Case:DMTs are rare in 23ai, but OMF still applies.
E . Automatic data file extension (AUTOEXTEND).
True. AUTOEXTEND ON allows data files to grow as needed, supported in both DMTs and LMTs since early versions.
Mechanics:ALTER DATABASE DATAFILE ... AUTOEXTEND ON NEXT 100M; works universally.
NEW QUESTION # 28
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