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NEW QUESTION 20
What is one of the differences between a microservice and a serverless function?

• A. Microservices are used for long running operations and serverless functions for short running operations.
• B. Microservices always use a data store and serverless functions never use a data store.
• C. Microservices are stateless and serverless functions are stateful.
• D. Microservices are triggered by events and serverless functions are not.

Answer: A

Explanation:
microservice is larger and can do more than a function. A function is a relatively small bit of code that performs only one action in response to an event.
Many microservices can run on several servers, and different instances of a specific microservice can run on several servers.
In many cases, microservices can be decomposed into a number of smaller stateless functions. The difference between microservices and functions is not simply the size. Functions are stateless, and they require no knowledge about or configuration of the underlying server-hence, the term serverless.
Microservices are best suited for long-running, complex applications that have significant resource and management requirements. You can migrate an existing monolithic application to microservices, which makes it easier to modularly develop features for the application and deploy it in the cloud. Microservices are also a good choice for building e-commerce sites, as they can retain information throughout a transaction and meet the needs of a 24/7 customer base.
On the other hand, serverless functions only execute when needed. Once the execution is over, the computing instance that runs the code decommissions itself. Serverless aligns with applications that are event driven, especially when the events are sporadic and the event processing is not resource-intensive. Serverless is a good choice when developers need to deploy fast and there are minimal application scaling concerns. For example, a good use of serverless computing is a scheduled task that needs to perform some data aggregation and will execute for just a few seconds.

References:
https://www.cloudflare.com/learning/serverless/glossary/serverless-microservice/
https://developer.oracle.com/java/fn-project-introduction.html
https://searchapparchitecture.techtarget.com/answer/When-should-I-choose-between-serverless-and-microservices

NEW QUESTION 21
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. Web Application Firewall
• B. Network Security Lists
• C. Network Security Groups
• D. Network Security Firewall

Answer: A

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 22
Which two statements are true for serverless computing and serverless architectures?

• A. Serverless function state should never be stored externally
• B. Applications running on a FaaS (Functions as a Service) platform
• C. Serverless function execution is fully managed by a third party
• D. Long running tasks are perfectly suited for serverless
• E. Application DevOps team is responsible for scaling

Answer: A,B

Explanation:
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.
The serverless and elastic architecture of Oracle Functions means there's no infrastructure administration or software administration for you to perform. You don't provision or maintain compute instances, and operating system software patches and upgrades are applied automatically. Oracle Functions simply ensures your app is highly-available, scalable, secure, and monitored Applications built with a serverless infrastructure will scale automatically as the user base grows or usage increases. If a function needs to be run in multiple instances, the vendor's servers will start up, run, and end them as they are needed.
Oracle Functions is based on Fn Project. Fn Project is an open source, container native, serverless platform that can be run anywhere - any cloud or on-premises.
Serverless architectures are not built for long-running processes. This limits the kinds of applications that can cost-effectively run in a serverless architecture. Because serverless providers charge for the amount of time code is running, it may cost more to run an application with long-running processes in a serverless infrastructure compared to a traditional one.
https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Concepts/functionsconcepts.htm
https://www.cloudflare.com/learning/serverless/why-use-serverless/

NEW QUESTION 23
Which is NOT a supported SDK on Oracle Cloud Infrastructure (OCI)?

• A. Python SDK
• B. Go SDK
• C. Java SDK
• D. .NET SDK
• E. Ruby SDK

Answer: D

Explanation:
https://docs.cloud.oracle.com/en-us/iaas/Content/API/Concepts/sdks.htm

NEW QUESTION 24
Which two statements accurately describe Oracle SQL Developer Web on Oracle Cloud Infrastructure (OCI) Autonomous Database?

• A. It is available for databases with both dedicated and shared Exadata infrastructure.
• B. After provisioning into an OCI compute Instance, it can automatically connect to the OCI Autonomous Databases instances.
• C. It must be enabled via OCI Identity and Access Management policy to get access to the Autonomous Databases instances.
• D. It provides a development environment and a data modeler interface for OCI Autonomous Databases.
• E. It is available for databases with dedicated Exadata infrastructure only.

Answer: D,E

Explanation:
Oracle SQL Developer Web
Oracle SQL Developer Web in Autonomous Data Warehouse provides a development environment and a data modeler interface for Autonomous Databases. SQL Developer Web is available for databases with both dedicated Exadata infrastructure and shared Exadata infrastructure.
https://docs.cloud.oracle.com/en-us/iaas/Content/Database/Tasks/adbtools.htm

NEW QUESTION 25
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