1Z0-1072-26 Practice Test 16 — 15 Questions

Question 1

What is the maximum MTU (Maximum Transmission Unit) supported on standard OCI VCN virtual network interfaces (VNICs)?

Accepted Answer

9000 bytes (Jumbo Frames). Standard OCI VNICs support an MTU of 9000 bytes (Jumbo Frames), as well as the standard 1500 bytes.

Answer

576 bytes

Answer

1500 bytes

Answer

65535 bytes

Question 2

Which THREE of the following actions can be performed using OCI Container Engine for Kubernetes (OKE)? (Choose three.)

Accepted Answer

Upgrading the Kubernetes control plane version independently of worker nodes. Option A is correct because OKE decouples control plane and node pool versioning: you can upgrade the managed control plane (e.g., via `oci ce cluster update` or the console) to a newer Kubernetes version while worker nodes remain on their current version until you separately upgrade each node pool. Option D is correct because OKE supports the Kubernetes Cluster Autoscaler, which watches for unschedulable pods and scales node pools up or down within configured min/max sizes to match pod resource demands. Option E is correct because OKE node pools can be spread across multiple fault domains within an availability domain (and across availability domains in multi-AD regions) by specifying placement/subnet configuration, improving resilience. Option B is not an OKE capability: OKE orchestrates containers as Kubernetes pods, whereas serverless containers without pod orchestration are provided by OCI Container Instances or OCI Functions. Option C is not possible because the OKE-managed control plane master nodes are fully managed by Oracle; customers cannot SSH into or alter kernel parameters on those master nodes.

Answer

Running serverless container instances without any Kubernetes pod orchestration

Answer

Directly modifying the underlying Linux kernel parameters of the OKE-managed control plane master nodes

Question 3

What is the maximum number of Route Tables allowed per Virtual Cloud Network (VCN) in OCI?

Accepted Answer

Multiple (subject to service limits). While there is a generous service limit, multiple route tables can be created and associated with different subnets within a VCN.

Answer

Exactly 1

Answer

Exactly 2

Answer

Zero

Question 4

Which OCI service feature enables you to automatically create identical compute instances based on an instance configuration and adjust the pool size based on demand?

Accepted Answer

Instance Pools and Autoscaling. Instance Pools combined with Autoscaling Configurations allow you to manage groups of identical instances and scale them automatically.

Answer

Dedicated Virtual Machine Hosts

Answer

Compute Cluster Placement Groups

Answer

Managed File Storage

Question 5

Which THREE features are supported by OCI DNS Traffic Management Steering Policies?

Accepted Answer

Failover steering. OCI Traffic Management steering policies support weighted round robin, failover, geolocation, ASN, and load balancer steering.

Answer

Database connection pooling steering

Answer

Virtual machine hypervisor CPU steering

Question 6

What is the maximum number of Availability Domains (ADs) in a typical multi-AD OCI region?

Accepted Answer

3. Standard multi-AD OCI regions contain exactly 3 Availability Domains.

Answer

1

Answer

5

Answer

2

Question 7

You are migrating a legacy application to OCI. The application requires a specific network interface card (NIC) virtualization mode and custom UEFI boot parameters that are not standard. Where should you configure these custom launch options?

Accepted Answer

In the Custom Image launch options settings. Custom Image launch options in OCI allow you to specify non-standard launch parameters such as NIC virtualization mode (paravirtualized vs. SR-IOV) and custom UEFI boot parameters at image creation time. These settings are baked into the custom image and applied whenever an instance is launched from it, which is exactly what a legacy application requiring specific NIC modes and UEFI parameters needs. This is the only option that operates at the image/launch layer where such hardware-level boot and NIC settings are defined.

Answer

Inside the VCN Security List configurations

Answer

Via the compute instance's operating system kernel parameters

Answer

In the Instance Configuration template parameters

Question 8

You have an OCI compute instance configured with an autoscaling policy. The autoscaling configuration scales out your instance pool by 2 instances when CPU exceeds 75%. You notice that during a traffic surge, the pool scales out, but shortly after, it scales right back in, causing flapping. How can you prevent this behavior?

Accepted Answer

Increase the autoscaling cooldown period.. Configuring an appropriate cooldown period (step delay) ensures that autoscaling waits a specified duration after a scaling event before evaluating metrics again.

Answer

Disable instance health checks entirely.

Answer

Decrease the instance pool maximum limit to 1.

Answer

Change the VCN route table timeout.

Question 9

An enterprise workload requires a fully managed Oracle Autonomous Data Warehouse with dedicated infrastructure to guarantee isolation from other tenants. Which deployment architecture should you select when provisioning this database?

Accepted Answer

Autonomous Data Warehouse on Dedicated Exadata Infrastructure. Autonomous Database on Dedicated Exadata Infrastructure provides a dedicated database environment that gives you an isolated Exadata infrastructure exclusively for your organization.

Answer

Autonomous Data Warehouse on Shared Exadata Infrastructure

Answer

Exadata Cloud@Customer without Autonomous operations

Answer

Oracle Base Database Service on Dedicated Exadata

Question 10

You are managing a set of compute instances in OCI. You need to ensure that the instances can be moved to a different compartment without disrupting their operation. Which TWO statements are true regarding moving compute instances between compartments? (Choose two.)

Accepted Answer

You must have permissions in both the source and destination compartments to move a compute instance.. Moving a compute instance between compartments is a metadata operation that does not require stopping the instance, and it can be done via Console or CLI. Additionally, you need permissions in both source and destination compartments. The instance's OCID remains the same, and attached volumes are not automatically moved.

Answer

Moving a compute instance between compartments requires stopping the instance first.

Answer

When you move a compute instance, its attached block volumes are automatically moved to the same compartment.

Answer

Moving a compute instance to another compartment changes its OCID.

Question 11

You want to create a custom gold image of a Linux compute instance containing specific security configurations and pre-installed agents. Which OCI feature should you use?

Accepted Answer

Custom Image. A Custom Image in OCI is created by capturing the boot volume of an existing compute instance, which preserves the operating system, installed applications, security configurations, and agents. This image can then be used to launch new instances that are pre-configured with the desired state. Unlike backups or clones, a custom image is specifically designed for creating standardized templates for instance deployment.

Answer

Block Volume Backup

Answer

Boot Volume Clone

Answer

Instance Configuration

Question 12

An application running on an OCI compute instance needs to share a POSIX-compliant file system concurrently across multiple compute instances residing in different subnets of the same VCN. Which storage service is best suited for this requirement?

Accepted Answer

File Storage Service. File Storage Service (FSS) provides a durable, scalable, enterprise-grade network file system that can be accessed concurrently by thousands of compute instances using the standard NFS v3.0 protocol across availability domains and subnets within a VCN.

Answer

Block Volume

Answer

Object Storage

Answer

Local NVMe

Question 13

You need to restore an Oracle Base Database System to a specific point in time using incremental backups and archived redo logs. Which tool should you use at the OS level if you are managing the recovery manually?

Accepted Answer

Oracle Recovery Manager (RMAN). Oracle Recovery Manager (RMAN) is the Oracle-native tool for performing point-in-time recovery using incremental backups and archived redo logs. It is the only tool listed that can apply incremental backups and redo logs to roll a database forward to a specific SCN or timestamp.

Answer

Data Pump (impdp)

Answer

OCI Block Storage Volume Snapshots

Answer

SQL*Loader

Question 14

Which TWO methods can be used to securely connect to a private OCI compute instance that does not have a public IP address? (Choose two.)

Accepted Answer

OCI Bastion Service. Option B (OCI Bastion Service) is correct because it is a managed, time-limited, IAM-controlled service that creates a secure SSH session to a private compute instance without requiring a public IP, using the Bastion plugin and a session created via the OCI Console, CLI, or API. Option C (a bastion host/jump server in a public subnet with SSH tunneling) is correct because the jump server has a public IP while the private instance does not, and SSH port forwarding (ssh -J or ProxyCommand) tunnels traffic through the jump host over the private subnet, keeping the target instance unreachable from the internet. Option A is wrong because Object Storage pre-authenticated requests (PARs) only grant temporary access to buckets/objects, not interactive shell or RDP access to a compute instance. Option D is wrong because moving the instance to a public subnet exposes it to the internet and is not a secure method, plus it may require reconfiguring route tables and security lists. Option E is wrong because direct SSH/RDP over an Internet Gateway requires a public IP and exposes the instance to the internet without any intermediate host, which is exactly what the scenario forbids.

Answer

Accessing the instance via Object Storage pre-authenticated requests

Answer

Changing the instance subnet to public temporarily while debugging

Answer

Direct RDP or SSH over the Internet Gateway without any intermediate host

Question 15

Which TWO types of targets can be specified in an OCI VCN route table rule?

Accepted Answer

NAT Gateway. Route table targets in OCI include Internet Gateways, NAT Gateways, Service Gateways, Dynamic Routing Gateways, Local Peering Gateways, and private IPs of VNICs (such as firewalls).

Answer

Block Volume

Answer

Identity and Access Management (IAM) Policy

Answer

Object Storage Bucket