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NEW QUESTION 39
You are developing a serverless application with Oracle Functions. You have created a function in compartment named prod. When you try to invoke your function you get the following error.
Error invoking function. status: 502 message: dhcp options ocid1.dhcpoptions.oc1.phx.aaaaaaaac... does not exist or Oracle Functions is not authorized to use it How can you resolve this error?

• A. Deleting the function and redeploying it will fix the problem
• B. Create a policy:
  Allow any-user to manage function-family and virtual-network-family in compartment prod
• C. Create a policy:
  Allow service FaaS to use virtual-network-family in compartment prod
• D. Create a policy:
  Allow function-family to use virtual-network-family in compartment prod

Answer: C

Explanation:
Troubleshooting Oracle Functions:
There are common issues related to Oracle Functions and how you can address them.
Invoking a function returns a FunctionInvokeSubnetNotAvailable message and a 502 error (due to a DHCP Options issue) When you invoke a function that you've deployed to Oracle Functions, you might see the following error message:
{"code":"FunctionInvokeSubnetNotAvailable","message":"dhcp options ocid1.dhcpoptions........ does not exist or Oracle Functions is not authorized to use it"} Fn: Error invoking function. status: 502 message: dhcp options ocid1.dhcpoptions........ does not exist or Oracle Functions is not authorized to use it If you see this error:
Double-check that a policy has been created to give Oracle Functions access to network resources.
Create Policies to Control Access to Network and Function-Related Resources:
Service Access to Network Resources
When Oracle Functions users create a function or application, they have to specify a VCN and a subnet in which to create them. To enable the Oracle Functions service to create the function or application in the specified VCN and subnet, you must create an identity policy to grant the Oracle Functions service access to the compartment to which the network resources belong.
To create a policy to give the Oracle Functions service access to network resources:
Log in to the Console as a tenancy administrator.
Create a new policy in the root compartment:
Open the navigation menu. Under Governance and Administration, go to Identity and click Policies.
Follow the instructions in To create a policy, and give the policy a name (for example, functions-service-network-access).
Specify a policy statement to give the Oracle Functions service access to the network resources in the compartment:
Allow service FaaS to use virtual-network-family in compartment <compartment-name> For example:
Allow service FaaS to use virtual-network-family in compartment acme-network Click Create.
Double-check that the set of DHCP Options in the VCN specified for the application still exists.
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Tasks/functionstroubleshooting.htm
https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Tasks/functionscreatingpolicies.htm

NEW QUESTION 40
You have a containerized app that requires an Autonomous Transaction Processing (ATP) Database. Which option is not valid for o from a container in Kubernetes?

• A. Enable Oracle REST Data Services for the required schemas and connect via HTTPS.
• B. Use Kubernetes secrets to configure environment variables on the container with ATP instance OCID, and OCI API credentials. Then use the CreateConnection API endpoint from the service runtime.
• C. Install the Oracle Cloud Infrastructure Service Broker on the Kubernetes cluster and deploy serviceinstance and serviceBinding resources for ATP. Then use the specified binding name as a volume in the application deployment manifest.
• D. Create a Kubernetes secret with contents from the instance Wallet files. Use this secret to create a volume mounted to the appropriate path in the application deployment manifest.

Answer: A

Explanation:
The Kubernetes documentation lays out the following use case for the Service Catalog API:
An application developer wants to use message queuing as part of their application running in a Kubernetes cluster. However, they do not want to deal with the overhead of setting such a service up and administering it themselves. Fortunately, there is a cloud provider that offers message queuing as a managed service through its service broker.
A cluster operator can setup Service Catalog and use it to communicate with the cloud provider's service broker to provision an instance of the message queuing service and make it available to the application within the Kubernetes cluster. The application developer therefore does not need to be concerned with the implementation details or management of the message queue. The application can simply use it as a service.
The samples in the OCI Service Broker source code include a deployment YAML file that describes how to use an init container to take the values in the Autonomous Transaction Processing service binding and put them in environment variables or in a volume mount. After that, your application can use those values to connect to the database.
Once you've installed and registered the service broker, you're ready to use the ATP service plan to provision an ATP instance. I'll go into details below, but the overview of the process looks like so:
-Create a Kubernetes secret with a new admin and wallet password (in JSON format)
- Create a YAML configuration for the ATP Service Instance
- Deploy the Service Instance
- Create a YAML config for the ATP Service Binding
- Deploy the Service Binding to obtain which results in the creation of a new Kubernetes secret containing the wallet contents
- Create a Kubernetes secret for Microservice deployment use containing the admin password and the wallet password (in plain text format)
- Create a YAML config for the Microservice deployment which uses an initContainer to decode the wallet secrets (due to a bug which double encodes them) and mounts the wallet contents as a volume References:
https://blogs.oracle.com/developers/creating-an-atp-instance-with-the-oci-service-broker
https://blogs.oracle.com/cloud-infrastructure/integrating-oci-service-broker-with-autonomous-transaction-processing-in-the-real-world

NEW QUESTION 41
Which is NOT a valid option to execute a function deployed on Oracle Functions?

• A. Invoke from Oracle Cloud Infrastructure CLI
• B. Invoke from Docker CLI
• C. Send a signed HTTP requests to the function's invoke endpoint
• D. Invoke from Fn Project CLI
• E. Trigger by an event in Oracle Cloud Infrastructure Events service

Answer: B

Explanation:
You can invoke a function that you've deployed to Oracle Functions in different ways:
Using the Fn Project CLI.
Using the Oracle Cloud Infrastructure CLI.
Using the Oracle Cloud Infrastructure SDKs.
Making a signed HTTP request to the function's invoke endpoint. Every function has an invoke endpoint.
Each of the above invokes the function via requests to the API. Any request to the API must be authenticated by including a signature and the OCID of the compartment to which the function belongs in the request header. Such a request is referred to as a 'signed' request. The signature includes Oracle Cloud Infrastructure credentials in an encrypted form.

NEW QUESTION 42
As a cloud-native developer, you have written a web service for your company. You have used Oracle Cloud Infrastructure (OCI) API Gateway service to expose the HTTP backend. However, your security team has suggested that your web service should handle Distributed Denial-of-Service (DDoS) attack. You are time-constrained and you need to make sure that this is implemented as soon as possible.
What should you do in this scenario?

• A. Re-write your web service and implement rate limiting.
• B. Use OCI API Gateway service and configure rate limiting.
• C. Use OCI virtual cloud network (VCN) segregation to control DDoS.
• D. Use a third party service integration to implement a DDoS attack mitigation,

Answer: B

Explanation:
Having created an API gateway and deployed one or more APIs on it, you'll typically want to limit the rate at which front-end clients can make requests to back-end services. For example, to:
- maintain high availability and fair use of resources by protecting back ends from being overwhelmed by too many requests
- prevent denial-of-service attacks
- constrain costs of resource consumption
- restrict usage of APIs by your customers' users in order to monetize APIs You apply a rate limit globally to all routes in an API deployment specification.
If a request is denied because the rate limit has been exceeded, the response header specifies when the request can be retried.
You can add a rate-limiting request policy to an API deployment specification by:
using the Console
editing a JSON file
{
"requestPolicies": {
"rateLimiting": {
"rateKey": "CLIENT_IP",
"rateInRequestsPerSecond": 10
}
},
"routes": [
{
"path": "/hello",
"methods": ["GET"],
"backend": {
"type": "ORACLE_FUNCTIONS_BACKEND",
"functionId": "ocid1.fnfunc.oc1.phx.aaaaaaaaab______xmq"
}
}
]
}
https://docs.cloud.oracle.com/en-us/iaas/Content/APIGateway/Tasks/apigatewaylimitingbackendaccess.htm

NEW QUESTION 43
A pod security policy (PSP) is implemented in your Oracle Cloud Infrastructure Container Engine for Kubernetes cluster Which rule can you use to prevent a container from running as root using PSP?

• A. forbiddenRoot
• B. RunOnlyAsUser
• C. NoPrivilege
• D. MustRunAsNonRoot

Answer: D

Explanation:
What is a Pod Security Policy?
A Pod Security Policy is a cluster-level resource that controls security sensitive aspects of the pod specification. The PodSecurityPolicy objects define a set of conditions that a pod must run with in order to be accepted into the system, as well as defaults for the related fields. They allow an administrator to control the following:
Privilege Escalation
These options control the allowPrivilegeEscalation container option. This bool directly controls whether the no_new_privs flag gets set on the container process. This flag will prevent setuid binaries from changing the effective user ID, and prevent files from enabling extra capabilities (e.g. it will prevent the use of the ping tool). This behavior is required to effectively enforce MustRunAsNonRoot.
example:
# Require the container to run without root privileges.
rule: 'MustRunAsNonRoot'
Reference:
https://kubernetes.io/docs/concepts/policy/pod-security-policy/

NEW QUESTION 44
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