1Z0-1072-26 Compute — 20 Questions

Question 1

Which TWO of the following are valid trigger sources for OCI Functions? (Choose two.)

Accepted Answer

OCI Events service reacting to resource state changes. OCI Functions can be invoked via OCI Events (e.g. storage object creation), API Gateway HTTP requests, or directly via the OCI SDK/CLI.

Answer

Direct attachment to VCN Internet Gateways without any intermediate services

Answer

Scheduled cron jobs running inside block volume snapshots

Question 2

A development team needs to deploy an application that requires exactly 6 OCPUs and 32 GB of memory. Which compute option best satisfies this requirement efficiently without wasting resources?

Accepted Answer

VM.Standard.E4.Flex configured with 6 OCPUs and 32 GB of RAM. Flexible shapes allow you to independently configure OCPUs and memory to match exact workload requirements.

Answer

VM.Standard1.16

Answer

BM.Standard.E3.128

Answer

VM.Standard2.8

Question 3

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. Launch options can be customized when creating a custom image or by updating the launch options of an existing custom image in OCI to specify firmware, network virtualization, and boot options.

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 4

You manage an instance pool backed by an autoscaling configuration. The pool reaches its maximum limit of 10 instances due to a traffic spike. A hardware maintenance event triggers a retirement notification for one of the instances in the pool. How does OCI Instance Pools with Autoscaling handle this retired instance?

Accepted Answer

The instance is replaced automatically by the instance pool to maintain the operational state, managing lifecycle events independently of active autoscaling metrics.. Instance pools automatically replace unhealthy or retired instances to maintain the desired capacity. If an instance is retired, the pool provisions a new instance to replace it, even if autoscaling has reached its maximum size, because minimum/desired capacity rules take precedence over instance retirement recovery.

Answer

The instance is terminated, and a new instance is provisioned to replace it, temporarily exceeding the maximum limit if necessary until scaling rules scale it back down.

Answer

The instance is terminated and not replaced because the pool is already at its maximum limit.

Answer

The autoscaling configuration must be manually edited to increase the max limit before the instance can be replaced.

Question 5

You need to run a dedicated compute instance where no other tenant's virtual instances can share the underlying physical hardware. Which OCI service or feature should you use?

Accepted Answer

Dedicated Virtual Machine Hosts. Dedicated Virtual Machine Hosts provide physical servers dedicated solely to your organization, allowing you to run virtual machines on dedicated hardware.

Answer

Bare Metal Instances

Answer

Instance Pools

Answer

Protected Compute Shapes

Question 6

Your serverless application built on OCI Functions needs to process events coming from OCI Object Storage when a new file is uploaded. What is the primary mechanism to trigger the function?

Accepted Answer

OCI Events Service. OCI Events service listens to resource state changes and can trigger an OCI Function when an object is created in Object Storage.

Answer

Direct polling of Object Storage buckets by the function container

Answer

Scheduled Cron Jobs in Compute

Answer

API Gateway direct integration

Question 7

You are deploying a Container Engine for Kubernetes (OKE) cluster and want to ensure that worker nodes are distributed across separate physical hardware infrastructures to maximize fault tolerance. Which feature should you configure during cluster creation?

Accepted Answer

Node Pool Fault Domains. Fault domains ensure that instances are distributed across physical hardware that has independent power and top-of-rack switches. OKE supports specifying fault domains or availability domains for node pools.

Answer

VCN Route Tables

Answer

Kubernetes Horizontal Pod Autoscaler

Answer

Pod Security Policies

Question 8

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. Custom images allow you to capture the boot volume of an existing compute instance to deploy new instances with identical configurations.

Answer

Block Volume Backup

Answer

Boot Volume Clone

Answer

Instance Configuration

Question 9

You are deploying a high-performance database workload on OCI that requires raw, low-latency NVMe drives for transaction logging. Which compute shape should you select?

Accepted Answer

BM.DenseIO2.52. Bare Metal Dense I/O shapes include directly attached NVMe SSDs, providing extreme IOPS and low latency suitable for databases and transactional logs.

Answer

BM.Standard3.64

Answer

VM.Standard.E4.Flex

Answer

BM.GPU3.8

Question 10

You are managing a Kubernetes cluster on OCI (OKE) and need to upgrade the Kubernetes control plane version. What happens to the existing worker nodes when you perform a control plane upgrade?

Accepted Answer

Worker nodes continue to run workloads, but you must manually or via node pool upgrades bring them to the matching version.. When you upgrade the control plane in OKE, the worker nodes continue running workloads normally, but they should eventually be upgraded to remain within supported version skew limits.

Answer

The cluster becomes completely inaccessible, and all pods are evicted permanently.

Answer

Control plane upgrades are blocked until all worker nodes are upgraded first.

Answer

All worker nodes are automatically terminated and recreated with the new version.

Question 11

Which type of compute shape provides the lowest cost per core for general-purpose workloads by utilizing ARM-based Ampere processors?

Accepted Answer

VM.Standard.A1.Flex. OCI Ampere A1 Compute shapes (VM.Standard.A1.Flex) use ARM processors and offer high power efficiency and cost-effectiveness for scale-out workloads.

Answer

VM.Standard.E4.Flex

Answer

BM.DenseIO2.52

Answer

VM.Standard3.Flex

Question 12

Which tool or command-line utility is primarily used to build, test, and push OCI Functions container images to the Oracle Functions Registry?

Accepted Answer

fn CLI. The Fn Project CLI is the open-source command-line tool used to develop, build, and deploy functions to OCI Functions.

Answer

terraform

Answer

oci-cli

Answer

kubectl

Question 13

An autoscaling configuration is attached to your instance pool. You notice that instances are scaling out correctly based on CPU utilization, but you want to ensure that scaling events do not happen too frequently in response to brief traffic spikes. Which setting should you adjust?

Accepted Answer

The Autoscaling Cooldown Period. Autoscaling configurations allow you to define a cooldown period (step delay) to prevent rapid scaling oscillations.

Answer

The Instance Pool capacity limits

Answer

The VCN DHCP Options timeout value

Answer

The Monitoring service metric polling interval

Question 14

You are setting up an autoscaling configuration for an instance pool. You want the pool to scale out when CPU utilization exceeds 80% and scale in when CPU utilization drops below 20%. What type of autoscaling policy should you create?

Accepted Answer

Metric-based autoscaling policy. Metric-based autoscaling policies allow you to define rules based on metrics such as CPU or memory utilization to scale out or scale in instances automatically.

Answer

Event-driven autoscaling policy

Answer

Schedule-based autoscaling policy

Answer

Manual capacity override policy

Question 15

You need to run an OCI Function that connects to an Oracle Autonomous Database secured within a private subnet. How should you configure the function to access the database securely without exposing it to the public internet?

Accepted Answer

Attach the function application to a private subnet within your VCN using VCN configuration.. OCI Functions support VCN configuration, allowing you to attach a function application to a specific subnet within a VCN so that functions can access private resources like databases via private IP addresses.

Answer

Use an API Gateway with a public endpoint and route database queries through HTTP headers.

Answer

Configure a public IP address on the function execution environment.

Answer

Functions cannot access private subnets; you must use an internet gateway.

Question 16

You need to migrate a Windows Server boot volume containing sensitive application data across regions in OCI. What is the recommended and most secure sequence of steps?

Accepted Answer

Create a custom image from the instance, export the image to an Object Storage bucket, copy the bucket to the target region, and import the image in the target region.. To move a boot volume or custom image across regions, you create a custom image from the boot volume, export it to an Object Storage bucket, copy the Object Storage bucket or export the custom image directly across regions, and then import it in the destination region.

Answer

Use the OCI Database Migration service to copy the operating system boot sectors.

Answer

Detach the boot volume, attach it to a secondary compute instance, and use rsync over a VCN remote peering connection.

Answer

Create a block volume backup, copy the backup directly to the destination region using the native backup copy feature, and restore it as a boot volume.

Question 17

You have created an instance configuration from a running compute instance. You now want to use this instance configuration to create an instance pool. Which parameter must you specify during the creation of the instance pool?

Accepted Answer

The placement (subnets and availability domains/fault domains) and the number of instances. When creating an instance pool from an instance configuration, you must specify the target availability domains or fault domains and the subnet(s) where the instances will be deployed, along with the desired number of instances.

Answer

The custom OS username and SSH password

Answer

The external DNS provider settings

Answer

The new root password for the boot volumes

Question 18

Which OCI service allows you to deploy and manage managed Kubernetes clusters without having to administer the underlying control plane nodes?

Accepted Answer

Oracle Container Engine for Kubernetes (OKE). OCI Container Engine for Kubernetes (OKE) is a fully managed, scalable, and highly available service that you can use to deploy your containerized applications to the cloud.

Answer

OCI Functions

Answer

Compute Instance Pools

Answer

Container Instances

Question 19

Your OKE cluster has a node pool running in a private subnet. A developer needs to troubleshoot a running node via SSH, but direct external SSH access is disabled. What is the recommended secure way to access the node?

Accepted Answer

Use the OCI Bastion service or a bastion host in a public subnet to tunnel SSH traffic to the private worker node.. For private OKE worker nodes, you can access them by deploying a bastion host (or using OCI Bastion service) in a public subnet and tunneling your SSH connection through the bastion host to the private IP of the worker node.

Answer

Temporarily attach a public IP address to the worker node and connect via SSH.

Answer

Modify the VCN security list to allow inbound SSH from 0.0.0.0/0 to the private subnet.

Answer

Run `kubectl exec` with privileged mode to gain root access to the underlying node's operating system.

Question 20

You need to resize the boot volume of an existing OCI Linux compute instance to provide more disk space for application logs. What is the correct sequence of actions?

Accepted Answer

Modify the boot volume size in the OCI Console, then use OS-level commands (such as `resizepart` and `xfs_growfs`) to extend the file system.. To expand a boot volume, you first update the boot volume size in the OCI Console, and then you must log in to the instance and extend the operating system partition and file system to recognize the new capacity.

Answer

Terminate the instance, detach the boot volume, attach it to another instance, expand it, and reattach it.

Answer

Reboot the instance; OCI automatically detects the new size and extends the file system partitions automatically.

Answer

Create a new block volume, mount it as the root directory, and delete the old boot volume.