anasm84 / oracle-1z0-1084-20

Comprehensive cheat sheet to pass Oracle 1Z0-1084-20 Exam

Oracle-1Z0-1084-20

Comprehensive cheat sheet to pass Oracle 1Z0-1084-20 Exam

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True in regards to service resiliency:

• Resiliency is about avoiding failures

Provisioning of storage buckets as part of your Kubernetes deployment process for the application:

• OCI Service Broker for Kubernetes

Find details of the tolerations field in a sample YAML file:

• kubectl explain pod.spec.tolerations

Load balancer shape is used by default in OCI container Engineer for Kubernetes:

• 100 Mbps

OCI Load Balancer integration with OCI Container Engine for Kubernetes (OKE):

• OKE service provisions a single OCI Load Balancer instance shared with all the Kubernetes services with LoadBalancer type in the YAML configuration

NOT a valid option to execute a function deployed on Oracle Functions:

• Invoke from Docker CLI

Wish to receive an email each time a Terraform action begins:

• Create an OCI Notification topic and email subscription with the destination email address. Then create an OCI Events rule matching "Resource Manager job - Create" condition, and select the notification topic for the corresponding action

Appropriate logging approach:

• All services log to standard output only

Service aggregator pattern:

• It involves implementing a separate service that makes multiple calls to other backend services

Which language cannot be used to write your Oracle function code:

• PL7SQL

NOT a supported SDK for Oracle Cloud Infrastructure:

• .NET SDK

Testing approaches for achieving high velocity of deployments and release of cloud-native applications:

• Automated testing

Per CAP theorem, the scenario where you need to make any trade-off between the guarantees:

• when there are no network partitions

Provide a log file from one of the nodes for troubleshooting purpose:

• ssh into the nodes using private key

Incorrect statement regards to the Oracle Cloud Infrastructure (OCI) Notifications service:

• It may be used to receive an email each time an OCI Autonomous Database backup is completed

Differences between a microservice and a serverless function:

• Microservices are used for long running operations and serverless functions for short running operations.

Rule can you use to prevent a container from running as root using PSP:

• MustRunAsNonRoot

Default locations of the configuration file that Oracle Cloud Infrastructures CLI uses for profile information:

• SHOME/.oci/config

API should you use to read and process the stream in OCI Streaming service:

• GetMessages

Use Oracle Cloud Infrastructure (OCI) APIs to POST messages to a stream in the OCI Streaming service:

• The request must include an authorization signing string including (but not limited to) x-contentsha256,content-type, and content-length headers

Minimum of storage that a persistent volume claim can obtain in OCI Container Engine for Kubernetes:

• 50 GB

NOT related to Oracle Cloud Infrastructure Resource Manager:

• Queue

Policies to control access not available in OCI API Gateway:

• Controlling access to OCI resources

open source engine for Oracle Functions:

• Fn Project

NOT required when signing GET requests to Oracle Cloud Infrastructure APIs:

• content-type

Trigger Oracle functions directly from other OCI services, without having to run custom code:

• OCI Registry

OCI service you can use to create and manage your infrastructure:

• OCI Resource Manager

Execute a script on a remote instance through OCI Resource Manager:

• Use Remote-exec

Dynamically make Kubernetes resources discoverable to public DNS servers:

• ExteralDNS

Delete container image from the repository:

• Edit the tenancy global retention policy

Authenticate with OCI CLI:

• Run oci session authenticate and provide your credentials

NOT a valid backend-type supported by Oracle Cloud Infrastructure (OCI) API Gateway:

• ORACLE_STREAMS_BACKEND

Difference between blue/green and canary deployment strategies:

• In blue/green, both old and new applications are in production at the same time. In canary, application is deployed Incrementally to a select group of people

Responsible for patching, upgrading and maintaining the worker nodes in OCI Container Engine for Kubernetes (OKE):

• The User

Pattern to help you minimize the probability of cascading failures in your system during partial loss of connectivity or a complete service failure:

• Circuit breaker Pattern

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Two "Action Type" options are NOT available in an OCI Events rule definition:

• Slack
• Email

Oracle Functions application:

• A logical group of functions
• A common context to store configuration variables that are available to all functions in the application

A stateful application deployed in OCI Container Engine for Kubernetes (OKE) that requires all of your worker nodes to mount and write data to persistent volumes:

• Use OCI File Services as persistent volume
• Use OCI Block Volume backed persistent volume

Push a new image in the Oracle Cloud Infrastructure (OCI) Registry:

• Assign a tag via Docker CLI to the image
• Generate an auth token to complete the authentication via Docker CLI

Handle Oracle Functions authentication automatically:

• Fn Project CLI
• Oracle Cloud Infrastructure CLl

Service choreography:

• Decision logic in service choreography is distributed
• Services involved in choreography communicate through messages/messaging systems.

Oracle SQL Developer Web on OCI Autonomous Database:

• It provides a development environment and a data modeler interface for OCI Autonomous Databases
• It is available for databases with both dedicated and shared Exadata infrastructure

Benefits of distributed systems:

• Resiliency
• Scalability

Required to enable OCI Container Engine for Kubernetes (OKE) cluster access from the kubectl CLI:

• Install and configure the OCI CLI
• A configured OCI API signing key pair

Serverless computing and serverless architectures:

• Serverless function state should never be stored externally
• Applications running on a FaaS (Functions as a Service) platform

Reason to choose to implement a serverless architecture:

• Automatic horizontal scaling
• Reduced operational cost

Characteristics of microservices:

• Microservices can be independently deployed
• Microservices communicate over lightweight APIs

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