1Z0-1085-26 Core Oci Services Practice Test 5 — 15 Questions

Question 1

An administrator must configure DNS resolution so that instances within a VCN can resolve custom internal domain names managed by an on-premises DNS server connected via FastConnect. Which OCI DNS feature should be used?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Private DNS Resolver with Forwarding Rules. OCI Private DNS resolver allows conditional forwarding rules to forward queries for specific domains to designated on-premises DNS servers.

Answer

Default Internet DNS Resolver

Answer

Public Zones

Answer

Traffic Management Steering Policies

Question 2

You want to automate object lifecycle management in an OCI Object Storage bucket so that files older than 90 days are automatically transitioned to Archive storage. What should you configure?

Accepted Answer

Object Storage Lifecycle Rules. Object Storage Lifecycle Rules allow you to define automated actions to transition objects to different storage tiers or delete them after a specified time period.

Answer

Pre-authenticated requests

Answer

A scheduled OCI Function with a custom script

Answer

Object Versioning policies

Question 3

Which OCI compute shape type provides dedicated physical server hardware with no hypervisor overhead, ensuring maximum performance and isolation?

Accepted Answer

Bare Metal Shapes. Bare Metal shapes provide dedicated physical servers with direct hardware access and zero virtualization overhead.

Answer

Preemptible Instances

Answer

Micro-instances

Answer

Flexible Shapes

Question 4

An organization requires a highly available IPsec VPN connection from their on-premises data center to an OCI VCN. To ensure high availability, what is the recommended architecture for the Dynamic Routing Gateway (DRG) and customer premise equipment (CPE)?

Accepted Answer

Redundant VPN tunnels utilizing multiple CPE public IP addresses terminating on the DRG.. OCI supports redundant VPN tunnels across multiple CPE public IPs terminating on a DRG to ensure high availability and failover.

Answer

Using an Internet Gateway instead of a DRG with redundant static routes.

Answer

A single VPN tunnel connecting to a single CPE device.

Answer

Configuring active-passive peering across two separate VCNs.

Question 5

You need to run a stateless containerized background processing job that executes periodically and terminates immediately upon completion without managing servers. Which OCI serverless service is ideal?

Accepted Answer

OCI Functions. OCI Functions is a fully managed, serverless Functions-as-a-Service platform that runs stateless, event-driven code and terminates automatically when the function completes, with no server management. It is ideal for periodic background processing jobs that run and exit. This matches the requirement for stateless, periodic, terminating, serverless execution.

Answer

Oracle Container Engine for Kubernetes

Answer

Block Storage Volumes

Answer

Bare Metal Compute Instances

Question 6

You are troubleshooting intermittent packet drops between two subnets in different VCNs connected via a Local Peering Gateway (LPG). Both VCNs have non-overlapping CIDR blocks. What is a common misconfiguration that could cause this issue?

Accepted Answer

Missing route table entries directing traffic to the Local Peering Gateway in both VCNs. VCN route tables must have rules pointing traffic destined for the peer VCN CIDR block to the Local Peering Gateway.

Answer

Using security lists instead of Network Security Groups

Answer

Attaching an Internet Gateway to the peering connection

Answer

Enabling Flow Logs on the subnets

Question 7

An administrator needs to create a flexible OCI compute virtual machine instance. Which parameters are required when selecting a flexible compute shape?

Accepted Answer

Number of OCPUs and amount of memory (RAM). Flexible compute shapes require specifying the number of OCPUs and the amount of memory (RAM) independently.

Answer

Physical socket count and hypervisor version

Answer

Only the fixed instance shape family name

Answer

Network bandwidth allocation and disk spindle speed

Question 8

Which OCI Object Storage feature allows you to grant temporary, time-bound read or write access to a specific bucket or object without sharing user credentials?

Accepted Answer

Pre-authenticated Requests (PARs). Pre-authenticated requests (PARs) provide a way to securely let external users access or download specific objects or buckets without credentials for a defined duration.

Answer

API Signing Keys

Answer

Identity and Access Management (IAM) Policies

Answer

Security Lists

Question 9

A database administrator needs to take an instantaneous, point-in-time, space-efficient copy of a large block volume without waiting for full data copying to complete. Which Block Volume feature should they use?

Accepted Answer

Block Volume Clone. Volume Clones provide an immediate, point-in-time copy of a block volume using metadata pointers, allowing immediate access without waiting for a full physical copy.

Answer

Boot volume attachment

Answer

Standard Block Volume Backup

Answer

Cross-region replication policy

Question 10

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 11

You need to deploy a batch processing job that can tolerate sudden termination by OCI if compute capacity is reclaimed, significantly reducing your compute costs. Which instance type should you choose?

Accepted Answer

Preemptible Instance. Preemptible Instances in OCI are designed for workloads that can tolerate sudden termination. They are significantly cheaper than standard instances but can be reclaimed by OCI when capacity is needed, with a 30-second warning. This makes them ideal for batch processing jobs that can be checkpointed or restarted, reducing compute costs.

Answer

Standard Bare Metal Shape

Answer

Standard Flexible VM Shape

Answer

Dedicated Virtual Machine Host

Question 12

An enterprise application deployed across multiple OCI subnets requires a Layer 4 load balancer that can handle millions of packets per second with ultra-low latency and preserve client source IP addresses. Which service should you deploy?

Accepted Answer

Network Load Balancer. Network Load Balancer (NLB) operates at Layer 4, handles high throughput and packet rates with low latency, and preserves source IPs.

Answer

OCI API Gateway

Answer

Dynamic Routing Gateway

Answer

Public Load Balancer (Layer 7)

Question 13

Which OCI Object Storage tier is recommended for storing data that is accessed infrequently, but requires rapid access when needed with lower retrieval costs than Archive?

Accepted Answer

Infrequent Access Storage. Infrequent Access storage tier is designed for data accessed less frequently, offering lower storage costs than Standard and faster retrieval than Archive.

Answer

Standard Storage

Answer

Boot Volume storage

Answer

Archive Storage

Question 14

You are configuring security rules for a multi-tier application. You want to allow web servers in a specific Network Security Group (NSG) to communicate with database servers in another NSG. How should you define the ingress rule in the database NSG?

Accepted Answer

Specify the web server Network Security Group as the source. OCI NSGs allow you to reference another NSG as the source in security rules, enabling tight access control between tiers without managing IP addresses.

Answer

Configure a Dynamic Routing Gateway rule

Answer

Use an Internet Gateway source identifier

Answer

Specify the CIDR block of the entire VCN as the source

Question 15

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