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Serverless computing is a cloud computing execution model that provisions computing resources on demand and offloads all responsibility for common infrastructure management tasks. They are auto-scalable so it can handle extremely active traffic periods.

Serverless computing does-not means there are no physical servers utilized, of course there are servers, but we don't have to manage them, in background cloud provider manage (provisioning, scheduling, scaling, patching and more) for us, this gives developers more time to develop and optimize their front-end application code and business logic. And with serverless, customers never pay for idle capacity. They pay only for the resources required to run their applications, and only when those applications are running.

Serverless is a polyglot environment, enabling developers to code in any language or framework - Java, Python, node.js - with which they're comfortable. Because serverless scales up and down on demand in response to workload, it offers significant cost savings for spiky workloads. But it does not offer the same savings for workloads characterized by predictable, steady or long-running processes; in these cases, a traditional server environment might be simpler and more cost-effective.

Serverless Implementations differ across service providers, and capabilities vary, including supported runtimes, authentication, scaling and monitoring.

Serverless architectures are well-suited for event-driven, IOT and stream-processing workloads most notably open-source Apache Kafka event streaming platform.

Benefits:

- Pay only for the time for our code will run.

- Developer don't have to take care of servers or infrastructure, it maintains by cloud provider, so they can focus more on development and business logic.

- API Management & Integrated event sources.

- Serverless scales up and down on demand in response to workload

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Hybrid multicloud is hybrid cloud that combines public cloud services and private cloud services from more than one cloud service provider. As It's a combination of public cloud + private cloud so users have a choice to move workloads between public and private cloud. For example: User can keep highly sensitive data on private cloud server behind the firewall & and can use public cloud capabilities also for less-sensitive workloads and data.

Containers are packages of your software that include everything that it needs to run, including code, dependencies, libraries, binaries, and more. - Container-based applications are faster to load and start. - Container-based applications can easily create purpose-built microservices.

Kubernetes relies on YAML configuration files to maintain the application state.

Continuous delivery lets development teams automate the process that moves software through the software development lifecycle, and it can provide many benefits when provisioning an integrated toolbox, including the following: -Reduce time to deployment through continuous testing and development -Decrease the costs associated with traditional software development -Scale software development based on project size -Deploy code automatically into each phase of the development cycle A continuous delivery tool enables you to use open source tools to build, deploy, and manage your applications. By integrating sets of tools, you can create repeatable and manageable tasks, not only for your development team but also your operations team. Open source continuous delivery tools you can use for a strong continuous delivery pipeline include: Jenkins, Concourse CI, Spinnaker, Travis CI, GoCD and GitLab CI

IBM Cloud™ Internet Services is a simple set of edge network services for customers looking to secure their internet-facing applications from DDoS attacks, data theft and bot attacks, as well as for those customers needing to optimize their web applications, or ensure global responsiveness and the ongoing availability of their internet-facing applications.

Explanation

Pay-As-You-Go is a utility computing billing method that is implemented in cloud computing and geared toward organizations and end users. customers pay for services as they are procured and/or used.