Option A is incorrect because restarting the dcsagent program might be necessary if it has the status of stop/waiting to resolve a backup failure1. This is one of the possible database service agent issues that can cause backup failures.

Option B is incorrect because setting the database archiving mode to NOARCHIVELOG will prevent you from performing online backups.You need to set the database archiving mode to ARCHIVELOG to enable online backups1. This is one of the possible database issues that can cause backup failures.

Option C is correct because ensuring that your database host can connect to OCI Object Storage is essential for performing backups.You need to check the object store connectivity issues that can cause backup failures, such as firewall rules, proxy settings, network routes, and security lists1.

Here are the steps to complete the challenge:

To create a new VCN with the name exam-vcn within your assigned compartment by using the Start VCN Wizard, follow these steps:

In the OCI Console, go to Networking and click Virtual Cloud Networks.

Select your assigned compartment from the list on the left.

Click Start VCN Wizard.

Select Create VCN with Internet Connectivity and click Start VCN Wizard.

Enter exam-vcn as the VCN Name and leave the other fields as default. Click Next.

Review the summary and click Create. This will create a VCN with a public subnet, a private subnet, an internet gateway, a NAT gateway, a service gateway, and a route table.

To create a new Oracle Functions application named exam-app within your assigned compartment by using the private subnet in your previously created VCN, follow these steps:

In the OCI Console, go to Developer Services and click Functions.

Select your assigned compartment from the list on the left.

Click Create Application.

Enter exam-app as the Application Name and select your previously created VCN from the VCN dropdown menu.

Select the private subnet from the Subnet dropdown menu and leave the other fields as default. Click Create. This will create an Oracle Functions application that can run serverless functions in a private subnet.

Option A is incorrect because using OCI Traffic management service with failover steering policy will not distribute the traffic between OCI and on premises infrastructure.Failover steering policy will only route traffic to a secondary endpoint if the primary endpoint is unresponsive2. This is not suitable for a gradual migration scenario.

Option B is correct because using OCI Traffic management service with Load Balancing steering policy will distribute the traffic between OCI and on premises infrastructure based on a ratio or round robin algorithm2. This will allow you to control the percentage of traffic that goes to the new infrastructure in OCI and monitor the results.

Option C is incorrect because using an OCI load Balancer will not distribute the traffic between OCI and on premises infrastructure.A load balancer will only distribute the traffic among multiple compute instances within a single region in OCI2. This will not help you migrate from your on premises infrastructure.

Option D is incorrect because using VPN connectivity between on premises Infrastructure and OCI and creating routing tables to distribute the traffic between them will require more effort than using OCI Traffic management service.You will need to set up a VPN connection, configure routing rules, and monitor the network performance2. This will not be as simple and reliable as using a DNS-based solution.

Option A is incorrect because rclone is not a tool provided by Object Storage.It is a third-party command-line program that can sync files to and from various cloud storage providers, including Object Storage1.

Option B is incorrect because contiguous numbers are not required for each part.Object Storage constructs the object by ordering part numbers in ascending order only if they are not specified in the commit operation1.

Option C is correct because after initiating a multipart upload, you need to explicitly commit or abort it.Otherwise, it remains active until it expires after 24 hours1.

Option D is incorrect because Object Storage does not provide APIs to split a file into multiple parts.You need to use your own tools or programs to do that1.

Option E is correct because you can list all parts that have been uploaded for an active multipart upload by using the ListMultipartUploadParts API or CLI command.However, you cannot list information for an individual object part by using the GetObject API or CLI command1.

To complete the task of creating a public API Gateway and invoking a private function in OCI, you can follow these steps:

To create a new public API Gateway in your compartment named exam-gateway, follow these steps:

In the OCI Console, go toDeveloper Servicesand clickAPI Gateway.

Select your assigned compartment from the list on the left.

ClickCreate Gateway.

Enterexam-gatewayas theNameand selectPublicas theType. You can also add a description for the gateway if you want.

Select your previously created VCN from theVCNdropdown menu and select any subnet from theSubnetdropdown menu. You can also enable logging for the gateway if you want.

ClickCreate. This will create a new public API Gateway in your compartment that can expose your functions to the internet.

To create a new API Deployment named exam-deployment using /v1 as the path prefix in exam-gateway, follow these steps:

In the OCI Console, go toDeveloper Servicesand clickAPI Gateway.

Select your assigned compartment from the list on the left and click on your previously created gateway (exam-gateway).

ClickDeploymentson the left panel and then clickCreate Deployment.

Enterexam-deploymentas theNameand selectFrom Scratchas theSpecification Type. You can also add a description for the deployment if you want.

Enter /v1 as thePath Prefixand leave the other fields as default. ClickNext.

To create a new route by using /hello as the path and GET as the method, follow these steps:

In the Create Deployment dialog box, clickAdd Route.

Enter /hello as thePath, select GET as theMethod, and select Oracle Functions as theType.

Select your previously created function (hello-python) from theFunction Namedropdown menu and leave the other fields as default. ClickSave Changes. This will create a new route that will invoke your function when you send a GET request to /v1/hello.

To create a new stateful CIDR Ingress Rule that allows for TCP HTTPS traffic (port 443) from all IP addresses and ports in the default Security List for exam-vcn, follow these steps:

In the OCI Console, go toNetworkingand clickVirtual Cloud Networks.

Select your assigned compartment from the list on the left and click on your previously created VCN (exam-vcn).

ClickSecurity Listson the left panel and then click on the default security list for your VCN.

ClickEdit All Rulesand then clickAdd Ingress Ruleunder the Ingress Rules section.

Enter 0.0.0.0/0 as theSource CIDR, select TCP as theIP Protocol, and enter 443 as both theSource Port Rangeand theDestination Port Range. You can also add a description for the rule if you want.

ClickSave Security List Rules. This will create a new stateful CIDR Ingress Rule that will allow HTTPS traffic from any source to reach your API Gateway.

To use curl to call the function via your API Gateway deployment, follow these steps:

In the OCI Console, go toDeveloper Servicesand clickAPI Gateway.

Select your assigned compartment from the list on the left and click on your previously created gateway (exam-gateway).

ClickDeploymentson the left panel and then click on your previously created deployment (exam-deployment).

Copy the value of the Endpoint URL field. This is the base URL for your API Deployment.

In a terminal window, enter the following command:

curl -k -X GET {deployment-endpoint}/v1/hello

where {deployment-endpoint} is the base URL that you copied.

For example, if your deployment endpoint is https://abc123xyz456.apigateway.us-ashburn-1.oci.customer-oci.com, your command would be:

curl -k -X GET https://abc123xyz456.apigateway.us-ashburn-1.oci.customer-oci.com/v1/hello

This will send a GET request to your API Deployment and invoke your function. You should see a response similar to this:

{'message': 'Hello World!'}

Topic 2, Multiple Choice Questions