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NEW QUESTION 26
Who is responsible for patching, upgrading and maintaining the worker nodes in Oracle Cloud Infrastructure Container Engine for Kubernetes (OKE)?

• A. The user
• B. Oracle Support
• C. It Is automated
• D. Independent Software Vendors

Answer: A

Explanation:
After a new version of Kubernetes has been released and when Container Engine for Kubernetes supports the new version, you can use Container Engine for Kubernetes to upgrade master nodes running older versions of Kubernetes. Because Container Engine for Kubernetes distributes the Kubernetes Control Plane on multiple Oracle-managed master nodes (distributed across different availability domains in a region where supported) to ensure high availability, you're able to upgrade the Kubernetes version running on master nodes with zero downtime.
Having upgraded master nodes to a new version of Kubernetes, you can subsequently create new node pools running the newer version. Alternatively, you can continue to create new node pools that will run older versions of Kubernetes (providing those older versions are compatible with the Kubernetes version running on the master nodes).
Note that you upgrade master nodes by performing an 'in-place' upgrade, but you upgrade worker nodes by performing an 'out-of-place' upgrade. To upgrade the version of Kubernetes running on worker nodes in a node pool, you replace the original node pool with a new node pool that has new worker nodes running the appropriate Kubernetes version. Having 'drained' existing worker nodes in the original node pool to prevent new pods starting and to delete existing pods, you can then delete the original node pool.
Upgrading the Kubernetes Version on Worker Nodes in a Cluster:
After a new version of Kubernetes has been released and when Container Engine for Kubernetes supports the new version, you can use Container Engine for Kubernetes to upgrade master nodes running older versions of Kubernetes. Because Container Engine for Kubernetes distributes the Kubernetes Control Plane on multiple Oracle-managed master nodes (distributed across different availability domains in a region where supported) to ensure high availability, you're able to upgrade the Kubernetes version running on master nodes with zero downtime.
You can upgrade the version of Kubernetes running on the worker nodes in a cluster in two ways:
(A) Perform an 'in-place' upgrade of a node pool in the cluster, by specifying a more recent Kubernetes version for new worker nodes starting in the existing node pool. First, you modify the existing node pool's properties to specify the more recent Kubernetes version. Then, you 'drain' existing worker nodes in the node pool to prevent new pods starting, and to delete existing pods. Finally, you terminate each of the worker nodes in turn. When new worker nodes are started in the existing node pool, they run the more recent Kubernetes version you specified. See Performing an In-Place Worker Node Upgrade by Updating an Existing Node Pool.
(B) Perform an 'out-of-place' upgrade of a node pool in the cluster, by replacing the original node pool with a new node pool. First, you create a new node pool with a more recent Kubernetes version. Then, you 'drain' existing worker nodes in the original node pool to prevent new pods starting, and to delete existing pods. Finally, you delete the original node pool. When new worker nodes are started in the new node pool, they run the more recent Kubernetes version you specified. See Performing an Out-of-Place Worker Node Upgrade by Replacing an Existing Node Pool with a New Node Pool.
Note that in both cases:
The more recent Kubernetes version you specify for the worker nodes in the node pool must be compatible with the Kubernetes version running on the master nodes in the cluster. See Upgrading Clusters to Newer Kubernetes Versions).
You must drain existing worker nodes in the original node pool. If you don't drain the worker nodes, workloads running on the cluster are subject to disruption.
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/ContEng/Tasks/contengupgradingk8sworkernode.htm

NEW QUESTION 27
Given a service deployed on Oracle Cloud Infrastructure Container Engine far Kubernetes (OKE), which annotation should you add in the sample manifest file below to specify a 400 Mbps load balancer?

• A. service.beta.kubernetes.io/oci-load-balancer-size: 400Mbps
• B. service.beta.kubernetes.io/oci-load-balancer-shape: 400Mbps
• C. service, beta, kubernetes . io/oci-load-balancer-kind: 400Mbps
• D. service.beta.kubernetes.io/oci-load-balancer-value: 400Mbps

Answer: B

Explanation:
Overview of Load Balancing:
SHAPE
A template that determines the load balancer's total pre-provisioned maximum capacity (bandwidth) for ingress plus egress traffic. Available shapes include 10Mbps, 100 Mbps, 400 Mbps, and 8000 Mbps.
oci-load-balancer-shape: A template that determines the load balancer's total pre-provisioned maximum capacity (bandwidth) for ingress plus egress traffic. Available shapes include 100Mbps, 400Mbps, and 8000Mbps. Cannot be modified after load balancer creation.
All annotations are prefixed with service.beta.kubernetes.io/. For example:
kind: Service
apiVersion: v1
metadata:
name: nginx-service
annotations:
service.beta.kubernetes.io/oci-load-balancer-shape: "400Mbps"
service.beta.kubernetes.io/oci-load-balancer-subnet1: "ocid..."
service.beta.kubernetes.io/oci-load-balancer-subnet2: "ocid..."
spec:
...
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/Balance/Concepts/balanceoverview.htm
https://github.com/oracle/oci-cloud-controller-manager/blob/master/docs/load-balancer-annotations.md

NEW QUESTION 28
Which one of the following is NOT a valid backend-type supported by Oracle Cloud Infrastructure (OCI) API Gateway?

• A. ORACLE_FUNCTIONS_BACKEND
• B. STOCK_RESPONSE_BACKEND
• C. ORACLE_STREAMS_BACKEND
• D. HTTP_BACKEND

Answer: C

Explanation:
In the API Gateway service, a back end is the means by which a gateway routes requests to the back-end services that implement APIs. If you add a private endpoint back end to an API gateway, you give the API gateway access to the VCN associated with that private endpoint.
You can also grant an API gateway access to other Oracle Cloud Infrastructure services as back ends. For example, you could grant an API gateway access to Oracle Functions, so you can create and deploy an API that is backed by a serverless function.
API Gateway service to create an API gateway, you can create an API deployment to access HTTP and HTTPS URLs.
https://docs.cloud.oracle.com/en-us/iaas/Content/APIGateway/Tasks/apigatewayusinghttpbackend.htm API Gateway service to create an API gateway, you can create an API deployment that invokes serverless functions defined in Oracle Functions.
https://docs.cloud.oracle.com/en-us/iaas/Content/APIGateway/Tasks/apigatewayusingfunctionsbackend.htm API Gateway service, you can define a path to a stock response back end
https://docs.cloud.oracle.com/en-us/iaas/Content/APIGateway/Tasks/apigatewayaddingstockresponses.htm

NEW QUESTION 29
A leading insurance firm is hosting its customer portal in Oracle Cloud Infrastructure (OCI) Container Engine for Kubernetes with an OCI Autonomous Database. Their support team discovered a lot of SQL injection attempts and cross-site scripting attacks to the portal, which is starting to affect the production environment.
What should they implement to mitigate this attack?

• A. Network Security Lists
• B. Web Application Firewall
• C. Network Security Firewall
• D. Network Security Groups

Answer: B

Explanation:
Web Application Firewall (WAF):
Oracle Cloud Infrastructure Web Application Firewall (WAF) is a cloud-based, Payment Card Industry (PCI) compliant, global security service that protects applications from malicious and unwanted internet traffic. WAF can protect any internet facing endpoint, providing consistent rule enforcement across a customer's applications.
WAF provides you with the ability to create and manage rules for internet threats including Cross-Site Scripting (XSS), SQL Injection and other OWASP-defined vulnerabilities. Unwanted bots can be mitigated while tactically allowed desirable bots to enter. Access rules can limit based on geography or the signature of the request.
The global Security Operations Center (SOC) will continually monitor the internet threat landscape acting as an extension of your IT infrastructure.
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/WAF/Concepts/overview.htm

NEW QUESTION 30
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