Free Oracle 1Z0-998-20 Exam Practice Questions & Explanations
Prepared & Reviewed by the ValidExamDumps Editorial Team
At ValidExamDumps, we consistently monitor updates to the Oracle 1Z0-998-20 exam questions by Oracle. Whenever our team identifies changes in the exam questions, objectives, focus areas or requirements, We immediately update our exam questions for both PDF and online practice exams. This commitment ensures our customers always have access to the most current and accurate questions. By preparing with these up to date and 100% exam domain coverage questions, our customers can successfully pass the Oracle Database Cloud Service 2020 Specialist exam on their first attempt without needing additional materials or study guides.
Other certification materials providers often include outdated or removed questions by Oracle in their 1Z0-998-20 exam. These outdated questions lead to customers failing their Oracle Database Cloud Service 2020 Specialist exam. In contrast, we ensure our questions bank includes only precise and up-to-date questions. Our main priority is your success in the Oracle 1Z0-998-20 exam, not profiting from selling obsolete exam questions in PDF or Online Practice Test.
An administrator has a single-node VM DB System with 2 OCPUs that is experiencing CPU pressure during month-end processing. The administrator plans to change the shape to a larger VM shape from the OCI Console and expects the database to remain online throughout the operation.
Is this expectation correct?
False. Scaling the shape (CPU/memory) of a single-node VM DB System requires the VM to be restarted, so the database is unavailable during the operation - it is not an online change. Only on multi-node RAC VM systems can the impact be reduced because nodes are scaled in a rolling fashion, and only Exadata-based services support truly online OCPU scaling. Scaling storage on a VM DB System, by contrast, can be done without downtime.
A customer launches a new Bare Metal DB System and must choose storage settings at provisioning time. They plan to store roughly 4 TB of data and want to maximize usable space while keeping the fast recovery area on the same system.
Which statement correctly describes storage behavior for Bare Metal DB Systems?
Bare Metal DB Systems use locally attached NVMe storage. At launch you select how the raw NVMe capacity is divided between DATA and RECO (the data storage percentage), and that choice is fixed for the life of the system - you cannot later grow the DB System by attaching block volumes to it.
B is wrong: Block Volume-based, scalable storage is a characteristic of VM DB Systems, not Bare Metal. C is wrong: the data storage percentage cannot be changed after provisioning. D is wrong: Object Storage is used for managed backups, not as a mirror of local storage, and RECO is still allocated locally.
An administrator must apply the latest quarterly Release Update to a 2-node RAC VM DB System with minimal downtime, and also wants the Grid Infrastructure patched. The system was provisioned through the OCI Database service.
Which two statements are true about patching this DB System? (Choose two.)
A is correct: OCI applies DB System patches to RAC systems in a rolling manner, node by node, preserving availability. C is correct: the Console exposes patches at two levels - the DB System (Grid Infrastructure and related components) and each Database Home - and provides a Precheck action that validates the patch can be applied before you run Apply.
B is wrong: Console/API patching is the supported method (the dbcli/dbaascli tooling is used under the covers). D is wrong: OCI does not force a backup as part of patching; you are responsible for having a valid backup. E is wrong: Database Homes are patched individually and are separate from the DB System patch.
A team runs a single-node VM DB System with a CDB. They must add a new pluggable database for a test application, and corporate policy requires that the new PDB's data be encrypted with its own TDE master key that is separate from the other PDBs.
Which statement about creating this new PDB on the Oracle Cloud Infrastructure DB System is correct?
When you create a PDB through the OCI Console, CLI or API on a DB System, you supply a PDB name and a PDB administrator password; the service creates the PDB and manages a distinct TDE master encryption key for that PDB in the keystore. Each PDB in an OCI-managed CDB has its own master key.
B is wrong because each PDB has its own master key inside the shared keystore. C is wrong: TDE is mandatory and is never disabled on OCI DB Systems. D is wrong: PDB management is available on VM and Bare Metal DB Systems as well.
A DBA provisions a 2-node VM DB System running Oracle Database 19c Enterprise Edition Extreme Performance in a private subnet. Application developers need to connect from an on-premises data center that is already linked to the VCN through FastConnect. The DBA created the database with a PDB named SALESPDB.
Which approach correctly enables the developers to connect to the PDB?
For a RAC VM DB System, clients connect through the SCAN listener using the service name of the PDB. Because the subnet is private and connectivity exists over FastConnect, the only extra requirement is a stateful ingress rule (security list or NSG) permitting TCP 1521 from the on-premises CIDR.
B is wrong: DB Systems in private subnets cannot be assigned public IPs, and exposing 1521 to the internet is not the intended pattern. C is wrong: PDBs are reached by service name; SID-based connection to the CDB does not target the PDB, and SCAN is available. D is wrong: a Service Gateway provides private access from the VCN to Oracle services (such as Object Storage), not inbound access from on-premises to a DB System.