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NEW QUESTION 39
With the volume of communication that can happen betweendifferent components in cloud-native applications, it is vital to not only test functionality, but also service resiliency.
Which statement is true with regards to service resiliency?
- A. Resiliency testing can be only done in a test environment.
- B. Resiliency is about avoiding failures.
- C. A goal of resiliency is not to bring a service to a functioning state after a failure.
- D. Resiliency is about recovering from failures without downtime or dataloss.
Answer: D
Explanation:
Explanation
Implement resilient applications:
Resiliency is the ability to (recover) from failures and continue to function. It isn't about avoiding failures but accepting the fact that failures will happen and responding to them in a way that avoids downtime or data loss. The goal of resiliency is to return the application to a fully functioning state after a failure.
References:
https://docs.microsoft.com/en-us/dotnet/architecture/microservices/implement-resilient-applications/
NEW QUESTION 40
You are building a cloud native, serverless travel application with multiple Oracle Functions in Java, Python and Node.js. You need to build and deploy these functions to a single applications named travel-app.
Which command will help you complete this task successfully?
- A. fn function deploy --all --application-name travel-ap
- B. fn -v deploy --ap travel-ap -- all
- C. oci fn application --application-name-ap deploy --all
- D. oci fn function deploy --ap travel-ap --all
Answer: B
Explanation:
Explanation
To get started with Oracle Functions:
Creating, Deploying, and Invoking a Helloworld Function
Step 6- Changedirectory to the newly created helloworld-func directory.
Step 7- Enter the following single Fn Project command to build the function and its dependencies as a Docker image called helloworld-func, push the image to the specified Docker registry, and deploythe function to Oracle Functions in the helloworld-app:
$ fn -v deploy --app helloworld-app
The -v option simply shows more detail about what Fn Project commands are doing (see Using the Fn Project CLI with Oracle Functions).
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Tasks/functionscreatingfirst.htm
NEW QUESTION 41
Which two arerequired to enable Oracle Cloud Infrastructure (OCI) Container Engine for Kubernetes (OKE) cluster access from the kubect1 CLI?
- A. An SSH key pair with the public key added to cluster worker nodes
- B. OCI Identity and Access Management Auth Token
- C. Install and configure the OCI CLI
- D. A configured OCI API signing key pair
- E. Tiller enabled on the OKE cluster
Answer: C,D
Explanation:
Explanation
Setting Up Local Access to Clusters
To set up a kubeconfig file to enable access to a cluster using a local installation of kubectl and theKubernetes Dashboard:
Step 1: Generate an API signing key pair
Step 2: Upload the public key of the API signing key pair
Step 3: Install and configure the Oracle Cloud Infrastructure CLI
Step 4: Set up the kubeconfig file
Step 5: Verify that kubectl can access the cluster
References:
https://docs.cloud.oracle.com/en-us/iaas/Content/ContEng/Tasks/contengdownloadkubeconfigfile.htm
NEW QUESTION 42
What can you use to dynamically make Kubernetes resources discoverable topublic DNS servers?
- A. ExternalDNS
- B. CoreDNS
- C. DynDNS
- D. kubeDNS
Answer: A
Explanation:
Explanation
Setting up ExternalDNS for Oracle Cloud Infrastructure (OCI):
Inspired by Kubernetes DNS, Kubernetes' cluster-internal DNS server, ExternalDNS makes Kubernetes resources discoverable via public DNS servers. Like KubeDNS, it retrieves a list of resources (Services, Ingresses, etc.) from the Kubernetes API to determine a desired listof DNS records.
In a broader sense, ExternalDNS allows you to control DNS records dynamically via Kubernetes resources in a DNS provider-agnostic way Deploy ExternalDNS Connect your kubectl client to the cluster you want to test ExternalDNS with. We first need to create a config file containing the information needed to connect with the OCI API.
Create a new file (oci.yaml) and modify the contents to match the example below. Be sure to adjust the values to match your own credentials:
auth:
region:us-phoenix-1
tenancy: ocid1.tenancy.oc1...
user: ocid1.user.oc1...
key: |
-----BEGIN RSA PRIVATE KEY-----
-----END RSA PRIVATE KEY-----
fingerprint: af:81:71:8e...
compartment: ocid1.compartment.oc1...
References:
https://github.com/kubernetes-sigs/external-dns/blob/master/README.md
https://github.com/kubernetes-sigs/external-dns/blob/master/docs/tutorials/oracle.md
NEW QUESTION 43
Which header is NOT required when signing GET requests to Oracle Cloud Infrastructure APIs?
- A. date or x-date
- B. content-type
- C. host
- D. (request-target)
Answer: B
Explanation:
Explanation
Authorization Header
The Oracle Cloud Infrastructure signature uses the "Signature"Authentication scheme (with an Authorization header), and not the Signature HTTP header.
This section describes the headers that must be included in the signing string:
For GET and DELETE requests (when there's no content in the request body), the signingstring must include at least these headers:
(request-target)
host
date or x-date (if both are included, Oracle uses x-date)
For PUT and POST requests (when there's content in the request body), the signing string must include at least these headers:
(request-target)
host
date or x-date (if both are included, Oracle uses x-date)
x-content-sha256 (except for Object Storage PUT requests; see the next section) content-type content-length References:
https://docs.cloud.oracle.com/en-us/iaas/Content/API/Concepts/signingrequests.htm
NEW QUESTION 44
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