Valid Oracle 1Z0-1084-20 Exam Questions Answers - 1Z0-1084-20 Dumps DumpsforSure
                     Oracle
1z0-1084-20
Oracle Cloud Infrastructure Developer 2020 Associate
[ Total Questions: 10]
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Oracle - 1z0-1084-20
Question #:1
You have been asked to create a stateful application deployed in Oracle Cloud Infrastructure (OCI) Container
Engine for Kubernetes (OKE) that requires all of your worker nodes to mount and write data to persistent
volumes.
Which two OCI storage services should you use?
A.  Use OCI File Services as persistent volume.
B.  Use GlusterFS as persistent volume.
C.  Use OCI Block Volume backed persistent volume.
D.  Use open source storage solutions on top of OCI.
E.  Use OCI Object Storage as persistent volume.
Answer: A C
Explanation
A PersistentVolume (PV) is a piece of storage in the cluster that has been provisioned by an administrator.
PVs are volume plugins like Volumes, but have a lifecycle independent of any individual Pod that uses the
PV.
A PersistentVolumeClaim (PVC) is a request for storage by a user. It is similar to a Pod. Pods consume node
resources and PVCs consume PV resources.
If you intend to create Kubernetes persistent volumes, sufficient block volume quota must be available in each
availability domain to meet the persistent volume claim. Persistent volume claims must request a minimum of
50 gigabytes
You can define and apply a persistent volume claim to your cluster, which in turn creates a persistent volume
that's bound to the claim. A claim is a block storage volume in the underlying IaaS provider that's durable and
offers persistent storage, enabling your data to remain intact, regardless of whether the containers that the
storage is connected to are terminated.
With Oracle Cloud Infrastructure as the underlying IaaS provider, you can provision persistent volume claims
by attaching volumes from the Block Storage service.
Question #:2
What is the open source engine for Oracle Functions?
A.  Apache OpenWhisk
B.  OpenFaaS
C.  
Oracle - 1z0-1084-20
C.  Fn Project
D.  Knative
Answer: C
Explanation
https://www.oracle.com/webfolder/technetwork/tutorials/FAQs/oci/Functions-FAQ.pdf
Oracle Functions is a fully managed, multi-tenant, highly scalable, on-demand, Functions-as-a-Service
platform. It is built on enterprise-grade Oracle Cloud Infrastructure and powered by the Fn Project open source
engine. Use Oracle Functions (sometimes abbreviated to just Functions) when you want to focus on writing
code to meet business needs.
Question #:3
In a Linux environment, what is the default locations of the configuration file that Oracle Cloud
Infrashtructure CLI uses for profile information/
A.  /etc/.oci/config
B.  /usr/local/bin/config
C.  SHOME/.oci/config
D.  /usr/bin/oci/config
Answer: C
Explanation
By default, the Oracle Cloud Infrastructure CLI configuration file is located at ~/.oci/config.
You might already have a configuration file as a result of installing the Oracle Cloud Infrastructure CLI.
Question #:4
You are deploying an API via Oracle Cloud Infrastructure (OCI) API Gateway and you want to implement
request policies to control access Which is NOT available in OCI API Gateway?
A.  Limiting the number of requests sent to backend services
B.  Enabling CORS (Cross-Origin Resource Sharing) support
C.  Providing authentication and authorization
D.  Controlling access to OCI resources
Oracle - 1z0-1084-20
Answer: D
Explanation
In the API Gateway service, there are two types of policy:
- a request policy describes actions to be performed on an incoming request from a caller before it is sent to a
back end
- a response policy describes actions to be performed on a response returned from a back end before it is sent
to a caller
You can use request policies to:
-  limit the number of requests sent to back-end services
-  enable CORS (Cross-Origin Resource Sharing) support
-  provide authentication and authorization
Question #:5
Which one of the statements describes a service aggregator pattern?
A.  It is implemented in each service separately and uses a streaming service
B.  It involves implementing a separate service that makes multiple calls to other backend services
C.  It uses a queue on both sides of the service communication
D.  It involves sending events through a message broker
Answer: B
Explanation
this pattern isolates an operation that makes calls to multiple back-end microservices, centralizing its logic into
a specialized microservice.
Question #:6
What can you use to dynamically make Kubernetes resources discoverable to public DNS servers?
A.  ExternalDNS
B.  CoreDNS
C.  DynDNS
D.  
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D.  kubeDNS
Answer: A
Question #:7
How do you perform a rolling update in Kubernetes?
A.  kubect1 rolling-update
B.  kubect1 upgrade  —image=*image:v2
C.  kubect1 update -c 
D.  kubect1 rolling-update  —image=image
Answer: A
Question #:8
You encounter an unexpected error when invoking the Oracle Function named "myfunction" in application
"myapp". Which can you use to get more information on the error?
A.  fn —debug invoke myapp myfunction
B.  DEBOG=l fn invoke myapp myfunction
C.  fn —verbose invoke myapp myfunction
D.  Call Oracle support with your error message
Answer: B
Explanation
Troubleshooting Oracle Functions
If you encounter an unexpected error when using an Fn Project CLI command, you can find out more about
the problem by starting the command with the string DEBUG=1 and running the command again. For
example:
$ DEBUG=1 fn invoke helloworld-app helloworld-func
Note that DEBUG=1 must appear before the command, and that DEBUG must be in upper case.
Question #:9
What are two of the main reasons you would choose to implement a serverless architecture?
Oracle - 1z0-1084-20
A.  No need for integration testing
B.  Reduced operational cost
C.  Improved In-function state management
D.  Automatic horizontal scaling
E.  Easier to run long-running operations
Answer: B D
Question #:10
You are implementing logging in your services that will be running in Oracle Cloud Infrastructure Container
Engine for Kubernetes. Which statement describes the appropriate logging approach?
A.  Each service logs to its own log file.
B.  All services log to an external logging system.
C.  All services log to standard output only.
D.  All services log to a shared log file.
Answer: C
Explanation
Application and systems logs can help you understand what is happening inside your cluster. The logs are
particularly useful for debugging problems and monitoring cluster activity. Most modern applications have
some kind of logging mechanism; as such, most container engines are likewise designed to support some kind
of logging. The easiest and most embraced logging method for containerized applications is to write to the
standard output and standard error streams.
https://kubernetes.io/docs/concepts/cluster-administration/logging/
https://blogs.oracle.com/developers/5-best-practices-for-kubernetes-security
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