1Z0-1085-26 Practice Test 21 — 15 Questions

Question 1

Which THREE statements are accurate regarding OCI Object Storage capabilities and architecture? (Choose three.)

Accepted Answer

Object Versioning can be enabled to protect against accidental overwrites and deletions.. OCI Object Storage is regional, highly durable, provides standard and archive tiers, and allows data immutability via Object Versioning and Object Locking.

Answer

Object Storage buckets can be directly mounted to Linux file systems via NFSv3 protocol natively.

Answer

Archive Storage data can be retrieved instantly upon API call without prior restoration requests.

Question 2

Your application running on OCI compute instances requires a shared POSIX-compliant file system that can be mounted simultaneously by hundreds of compute instances across multiple availability domains. Which OCI storage service should you select?

Accepted Answer

File Storage Service (FSS). OCI File Storage Service (FSS) provides a durable, scalable, enterprise-grade network file system that supports the standard NFS v3.0 protocol and can be mounted concurrently from multiple instances across availability domains.

Answer

Block Volume

Answer

Object Storage

Answer

Archive Storage

Question 3

Which of the following best describes the isolation level between OCI Availability Domains within the same region?

Accepted Answer

They are completely isolated from each other with independent power, cooling, and physical security, while being connected by a low-latency network.. OCI Availability Domains (ADs) within a region are designed as physically separate data centers with independent power, cooling, and physical security infrastructure, so a failure in one AD (power outage, fire, flood) cannot cascade to another. Despite this physical isolation, ADs are interconnected via a dedicated low-latency, high-bandwidth network that enables synchronous replication and cross-AD failover for services like Block Volume, Object Storage, and Exadata. This combination of fault isolation plus low-latency interconnect is what allows OCI to offer 99.95%+ SLAs and support multi-AD HA architectures within a single region.

Answer

They are located in different countries to ensure compliance with international tax laws.

Answer

They share physical power supplies and network switches to reduce operational costs.

Answer

They operate as independent public clouds with separate IAM user directories.

Question 4

A cloud architect needs to provision an Oracle Cloud Infrastructure (OCI) Compute instance with a custom number of OCPUs and memory for a memory-intensive application. Which shape type should the architect select?

Accepted Answer

Flexible shape. Flexible shapes in OCI allow you to independently specify the number of OCPUs and the amount of memory per OCPU, making them ideal for memory-intensive workloads that need a non-standard CPU-to-memory ratio. You can provision as few as 1 OCPU and up to 64 GB memory per OCPU (depending on the shape series), giving precise control over the resource mix. This is the only shape type that supports custom OCPU/memory configurations.

Answer

GPU shape

Answer

Standard shape

Answer

DenseIO shape

Question 5

An architect is evaluating OCI's distributed cloud offerings. A client in the healthcare sector requires an on-premises deployment that includes the complete portfolio of OCI cloud services, autonomous database capabilities, and exact API parity with the public cloud, all managed locally. Which OCI solution should be proposed?

Accepted Answer

OCI Dedicated Region. OCI Dedicated Region is the only OCI distributed cloud offering that delivers the complete portfolio of OCI public cloud services—including autonomous database capabilities—directly into a customer's on-premises data center. It provides exact API parity with the public cloud and is fully managed by Oracle, meeting the healthcare client's requirement for a local, comprehensive cloud environment. Other options provide only subsets of services or are hosted in the public cloud, not on-premises.

Answer

Oracle Autonomous Database on Dedicated Exadata Infrastructure in the Public Cloud

Answer

OCI Exadata Cloud@Customer

Answer

OCI Compute Cloud@Customer

Question 6

You need to ensure that database block volumes are automatically backed up every day with a retention policy of 30 days across multiple regions. What OCI feature should you use?

Accepted Answer

Block Volume Backup Policies. Volume Backup Policies allow you to assign predefined or custom backup schedules (daily, weekly, monthly) with automated cross-region replication and retention rules.

Answer

Manual OCI CLI snapshot scripts

Answer

Object Storage Lifecycle Management rules

Answer

Compute Instance Autoscaling configurations

Question 7

Which THREE of the following statements are true regarding OCI Block Volume backups and performance? (Choose three.)

Accepted Answer

Block volume performance can be scaled independently of storage capacity by adjusting Volume Performance Units (VPUs).. Option A is correct because OCI Block Volume performance is governed by Volume Performance Units (VPUs), which let you raise or lower IOPS/throughput independently of the volume's size in GB, so performance and capacity scale separately. Option D is correct because OCI Block Volume backups can be copied from one region to another, enabling cross-region backup retention and disaster-recovery strategies. Option E is correct because OCI supports online resizing of a block volume, meaning you can increase its size while it remains attached to the compute instance without detaching or rebooting. Option B is not correct because a block volume attaches to a single instance within one availability domain at a time, not to one instance across multiple regions simultaneously. Option C is not correct because OCI Block Volume backups support incremental backups, with the first backup being full and subsequent backups capturing only changes.

Answer

Block volumes can only be attached to a single compute instance across multiple regions simultaneously.

Answer

Block volume backups are always full backups and incremental backups are not supported.

Question 8

You need to connect an on-premises data center to an OCI Virtual Cloud Network with dedicated, high-bandwidth, and predictable network performance that bypasses the public internet entirely. Which OCI networking service should you implement?

Accepted Answer

FastConnect. FastConnect provides a dedicated, private physical connection between an on-premises data centre and OCI, delivering high and predictable bandwidth while completely bypassing the public internet. It is the only OCI service in the list designed for dedicated private connectivity with consistent performance. This matches the requirement for dedicated, high-bandwidth, predictable, internet-bypassing connectivity.

Answer

Internet Gateway

Answer

Local Peering Gateway

Answer

Site-to-Site VPN

Question 9

Which TWO methods can be used to authenticate users accessing OCI services? (Choose two.)

Accepted Answer

API signing keys for CLI and SDK access. Option C is correct because OCI uses API signing keys (RSA key pairs) to authenticate programmatic access via the CLI, SDKs, and REST APIs, where the private key signs requests and the public key fingerprint is registered on the user account in IAM. Option D is correct because interactive console access to OCI services is authenticated with a username and password, and OCI supports multi-factor authentication (MFA) via the Oracle Mobile Authenticator app or a third-party authenticator to strengthen that login. Option A is wrong because SSH key pairs are used for logging into compute instances, not for authenticating users to OCI services, and they are not stored in IAM policies. Option B is wrong because shared tenancy root certificates are not an OCI user authentication method. Option E is wrong because compartments are logical containers for organizing and isolating resources, not credentials used for authentication.

Answer

Secure Shell (SSH) key pairs stored in IAM policies

Answer

Shared tenancy root certificates

Answer

IAM compartment credentials

Question 10

You are reviewing the network architecture of an OCI region and need to understand the connectivity between availability domains. Which statement is accurate regarding availability domain inter-connectivity?

Accepted Answer

Availability domains are connected by a high-bandwidth, low-latency network.. Availability domains within an OCI region are physically separated data centers connected by a dedicated high-bandwidth, low-latency, redundant network fabric. This interconnect is what allows multi-AD architectures to replicate data and serve traffic across ADs with predictable performance, without traversing the public internet. The ADs remain isolated for fault-tolerance purposes (separate power, cooling, and network), but they are not network-isolated from each other — that distinction is the core of the correct answer.

Answer

Availability domains are isolated from each other and cannot communicate directly over the network.

Answer

Communication between availability domains must route through the public internet.

Answer

Availability domains share the same physical power infrastructure to ensure identical latency.

Question 11

What is the primary purpose of an OCI Internet Gateway when attached to a Virtual Cloud Network (VCN)?

Accepted Answer

To provide a communication path between the VCN and the public internet. An Internet Gateway provides a path for bidirectional network traffic between your VCN and the public internet.

Answer

To peer two VCNs within the same tenancy

Answer

To connect on-premises data centers via private circuits

Answer

To route traffic privately to Oracle services like Object Storage

Question 12

An application administrator is configuring a high-availability database cluster across three Fault Domains in a single Availability Domain. During a scheduled infrastructure maintenance event affecting Fault Domain 1, the administrator notices that one of the database nodes becomes unreachable. What is the expected behavior of OCI Fault Domains in this scenario?

Accepted Answer

Only instances in Fault Domain 1 are impacted by the maintenance, while instances in Fault Domains 2 and 3 continue to run normally without disruption.. OCI Fault Domains are independent, isolated groups of hardware within a single Availability Domain, each with its own power, cooling, and network. When maintenance affects Fault Domain 1, only resources in that fault domain are impacted; instances in Fault Domains 2 and 3 remain fully operational because they are physically and logically separate. This isolation is the core purpose of fault domains: to prevent a single failure or maintenance event from affecting all resources in an Availability Domain.

Answer

The database cluster automatically fails over its primary role to an instance in a different Availability Domain.

Answer

The entire Availability Domain is taken offline to synchronize the maintenance state across all Fault Domains.

Answer

Instances in Fault Domain 1 are automatically migrated to Fault Domain 2, causing a brief network partition.

Question 13

Your company has deployed resources across multiple compartments in Oracle Cloud Infrastructure (OCI). You need to track operational costs and allocate cloud spend back to specific business units using metadata key-value pairs attached to resources. Which OCI feature should you use?

Accepted Answer

Cost-tracking tags. Tags in OCI allow you to attach metadata to resources, which can then be used in Cost Analysis for tracking and allocating spend.

Answer

IAM policies

Answer

Budgets

Answer

Compartment quotas

Question 14

Which TWO statements are true regarding OCI File Storage Service (FSS)? (Choose two.)

Accepted Answer

All data stored in OCI File Storage is encrypted at rest by default.. Option D is correct because OCI File Storage Service encrypts all file system data at rest by default using Oracle-managed keys, with the option to use customer-managed keys in OCI Vault, so no additional configuration is required to achieve encryption at rest. Option E is correct because FSS exposes file systems over the NFSv3 protocol, and a single file system can be mounted concurrently by thousands of compute instances across subnets, availability domains, and even regions via mount targets, making it suitable for shared, highly concurrent workloads. Option A is incorrect because FSS is a managed, durable network file system backed by redundant OCI storage infrastructure, not a single instance's local NVMe drive (that describes instance-local NVMe or Block Volume). Option B is incorrect because FSS file systems scale far beyond 50 GB, with a minimum of 50 GB and the ability to grow to many terabytes (up to 8 PB per file system in current OCI limits). Option C is incorrect because FSS uses NFSv3 over TCP/IP, not iSCSI; iSCSI is the protocol used by OCI Block Volume attachments, not File Storage.

Answer

File storage data is stored entirely within a single compute instance's local NVMe drive.

Answer

File Storage file systems have a hard maximum capacity limit of 50 Gigabytes.

Answer

File Storage requires iSCSI protocol configuration on every client instance.

Question 15

What is the primary purpose of OCI Fault Domains within an Availability Domain?

Accepted Answer

To provide fault tolerance against hardware and power failures within an Availability Domain.. Fault domains are groupings of hardware within a single availability domain, each with independent power and cooling. Their purpose is to let you distribute instances so that a hardware or power failure in one fault domain does not take down all copies of your workload. They are not network-isolation constructs, billing constructs, or geographic-boundary constructs — those map to VCNs, compartments/tags, and regions respectively.

Answer

To isolate network traffic between different virtual cloud networks (VCNs).

Answer

To segregate billing and cost-management data across different departments.

Answer

To define geographic boundaries for global data residency compliance.