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Oracle 1Z0-083 Exam Practice Questions, practice question pack
ORACLE · 1Z0-083

Oracle 1Z0-083 Exam Practice Questions

99% pass rateUpdated 1 Nov 2026181 questions2 PDFs by email
5.04 reviews
(4 customer reviews)

US$39

Every question with the correct answer and why the other options are wrong.

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Passed my 1Z0-083 using this
Paul Novikov1Z0-083
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Three of the 181 questions in this pack

Question 1

Which two are true about flashback features in Oracle Database 19c and later releases? (Choose two.)

  1. Flashback logs are automatically purged when DB_FLASHBACK_RETENTION_TARGET is set lower than the time they have already been retained.
  2. Flashback logs are monitored and proactively deleted when beyond the retention period defined in DB_FLASHBACK_RETENTION_TARGET only after there is space pressure.
  3. Flashback logs are monitored and proactively deleted when beyond the retention period defined in DB_FLASHBACK_RETENTION_TARGET before there is space pressure.
  4. Flashback logs are monitored for being older than the retention period defined in DB_FLASHBACK_RETENTION_TARGET and can be deleted by an administrator written event trigger.
  5. Flashback logs are automatically purged whenever the value of DB_FLASHBACK_RETENTION_TARGET is changed.
Show answer and explanation

Correct answer: A, C. Flashback logs are automatically purged when DB_FLASHBACK_RETENTION_TARGET is set lower than the time they have already been retained; Flashback logs are monitored and proactively deleted when beyond the retention period defined in DB_FLASHBACK_RETENTION_TARGET before there is space pressure.

Flashback logs are managed by Oracle with proactive deletion based on the DB_FLASHBACK_RETENTION_TARGET parameter. Option A is correct because when DB_FLASHBACK_RETENTION_TARGET is lowered, logs exceeding the new retention period are automatically purged. Option C is correct because Oracle monitors flashback logs and deletes those beyond the retention period before space pressure occurs, enabling predictable resource management. Option B is incorrect because deletion happens proactively, not only during space pressure. Options D and E are incorrect because flashback logs are managed automatically by the database, not through administrator triggers or manual changes to the parameter.

Why the other options are wrong

  • B. Flashback logs are deleted proactively before space pressure, not reactively only when space is needed.
  • D. Flashback logs cannot be deleted by administrator-written event triggers; deletion is automatic.
  • E. Simply changing DB_FLASHBACK_RETENTION_TARGET does not trigger purging; the new value is applied going forward.

Question 2

Which two are true about RMAN duplexed backup sets? (Choose two.)

  1. A duplexed backup set uses the same number of SBT channels as a non-duplexed backup set for the same number of files.
  2. A non-duplexed backup set written to disk can be duplexed to disk by backing up the backup set that is already on disk.
  3. A non-duplexed backup set written to SBT can be duplexed to tape by backing up the backup set that is already on tape.
  4. A non-duplexed backup set written to disk can be duplexed to tape by backing up the backup set that is already on disk.
  5. A non-duplexed backup set written to SBT can be duplexed to disk by backing up the backup set that is already on tape.
  6. A duplexed backup set always uses twice as many SBT channels as a non-duplexed backup set for the same number of files.
Show answer and explanation

Correct answer: D, F. A non-duplexed backup set written to disk can be duplexed to tape by backing up the backup set that is already on disk; A duplexed backup set always uses twice as many SBT channels as a non-duplexed backup set for the same number of files.

Duplexed backup sets create multiple copies of backup data across channels. Option D is correct because a non-duplexed backup set on disk can be duplexed to tape by using the BACKUP BACKUPSET command to create a copy on tape. Option F is correct because duplexing inherently doubles the channel utilization, one set of channels reads the original backup while another set writes to the duplex destination. Option A is wrong because duplexing requires additional channels. Options B, C, and E are incorrect because duplexing follows source-to-different-destination patterns: disk to tape (D) or tape backups cannot be re-duplexed to other media by simply backing up the existing backup in the same location.

Why the other options are wrong

  • A. Duplexed backup sets require more channels than non-duplexed sets to read and write simultaneously.
  • B. A disk backup cannot be duplexed to disk; duplexing creates copies to different destination types.
  • C. Tape backups cannot be duplexed by backing up the tape backup again; this would create a duplicate, not a duplex.
  • E. Tapes cannot be duplexed to disk by backing up the tape; the direction is reversed from option D's capability.

Question 3

Which three are true about RMAN persistent configuration settings, administration, and their effects? (Choose three.)

  1. A target database's persistent RMAN configuration settings are always stored in the target's control file
  2. Backup older than the recovery window retention policy are always deleted automatically if the backup location has insufficient space.
  3. Backups written to the fast recovery area (FRA) that are obsolete based on the redundancy retention policy can be deleted automatically to free space.
  4. The RMAN SHOW ALL command displays only settings with nondefault values.
  5. A target database's persistent RMAN configuration settings are always synchronized automatically with the RMAN catalog.
  6. The V$RMAN_CONFIGURATION view displays only settings with values that have been modified.
  7. A DBA must specify either a redundancy retention policy or a recovery window retention policy.
Show answer and explanation

Correct answer: A, C, F. A target database's persistent RMAN configuration settings are always stored in the target's control file; Backups written to the fast recovery area (FRA) that are obsolete based on the redundancy retention policy can be deleted automatically to free space; The V$RMAN_CONFIGURATION view displays only settings with values that have been modified.

Option A is correct because RMAN configuration settings are always stored in the target database's control file as the permanent repository. Option C is correct because backups stored in the FRA that become obsolete under the redundancy retention policy are automatically deleted to free up space in the FRA. Option F is correct because V$RMAN_CONFIGURATION displays only configuration settings that have been explicitly modified from their default values. Option B is incorrect because backups are deleted only if obsolete by policy, not automatically during space pressure without policy triggers. Option E is incorrect because persistent RMAN configurations stored in the control file are not automatically synchronized with the RMAN catalog. Option G is incorrect because specifying a retention policy is optional; neither redundancy nor recovery window policies are mandatory.

Why the other options are wrong

  • B. Backups are deleted based on retention policies, not automatically during space pressure alone.
  • D. SHOW ALL displays all configuration settings, both default and modified.
  • E. Control file configurations are independent; they do not automatically synchronize with an RMAN catalog.
  • G. No retention policy is required; both are optional configuration choices.

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REVIEWS

4 reviews for Oracle 1Z0-083 Exam Practice Questions

  1. Paul Novikov –

    Passed my 1Z0-083 using this

  2. Marico –

    Searching for Oracle Oracle Database 19c 1Z0-083 exam dumps landed me to the Cert Stash website, it was my first experience of using their exam dumps. I was fully convinced. Got through with 91% marks.

  3. Bonnet Osei –

    Good stuff

    Exam went well

  4. Jonas Farooq –

    Effective

    passed, thanks!

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How much of the Oracle 1Z0-083 bank is free?

181 questions in the bank

Each step includes the one before, so buying only adds new questions.

  • You are here10questionsFree sampleThree on this page, all ten as a PDF.Download the sample
  • 4525% of the bankPractice pageFree on the site, every answer explained.Go to the practice page
  • 82the first half of the packHalf PackFree by email, as one PDF, every answer explained.Get the Half Pack
  • 181100%, the whole bankFull pack, US$39Plus the questions-only PDF, monthly updates, refund if you fail.Get the full pack
ABOUT THIS PACK

What’s in the Oracle 1Z0-083 pack

  • 181 questions mapped to the 1Z0-083 exam objectives
  • Answers and explanations for every question, including the wrong options
  • A questions-only PDF for timed practice runs
  • Delivered by email shortly after checkout
  • Free monthly updates for as long as the exam is live
  • Pass or your money back

A failed 1Z0-083 attempt means paying the exam fee again. This pack is US$39, paid once.

What makes the 1Z0-083 hard

1Z0-083 is the OCP exam, the one that turns an associate into an Oracle Certified Professional, and it goes where junior DBAs have not: multitenant, backup theory and upgrades.

The multitenant material dominates: CDB and PDB architecture, creating and cloning PDBs, resource management across containers. Then RMAN in depth, covering backup strategies, restore and recover scenarios, catalog behaviour, flashback technologies and when each applies, and the upgrade and patching questions. The scenario style is a failure at a given SCN with a given set of backups, asking what is recoverable, which is unforgiving without practice.

At a 57% pass mark it sounds forgiving. The 68-question breadth says otherwise.

About the exam

1Z0-083 certifies professional-level Oracle Database administration: multitenant architecture, RMAN backup and recovery, flashback, performance basics and upgrades, completing the Oracle Database Administration 2019 Certified Professional (OCP) with 1Z0-082. Does not expire.

Questions before you buy

How quickly do I receive it?

Your PDF is prepared and sent to your email address after checkout, and you get a confirmation as soon as it is on its way.

Are updates included?

Yes. The pack is updated every month for as long as the exam is live, and updates are free for everyone who has bought it.

What if I fail the exam?

We refund the pack, or swap it for any other pack if you would rather keep studying. Sit the exam 7 to 30 days after buying, then send your official score report within 7 days of the exam date, as set out in the refund policy.

What is your pass rate?

99% of customers who prepare with a CertStash pack pass. If you do not, we refund the pack, or swap it for another pack.

Can I share it with colleagues?

Each purchase is licensed to one person. For a team, school or training organisation, email support@certstash.com for a licence that fits.

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