Solutions Architect Interview Questions AWS Serverless

Let's go over #AWS Solutions Architect interview questions on Serverless, and their real world answers!

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Timestamps:
0:00​ Questions covered
1:17​ What is AWS Lambda
2:21​ Name some Serverless services
3:06​ How to handle Lambda cold starts
8:32​ Using own container image with Lambda
10:06​ Lambda vs Fargate Scaling
14:04​ Changing Lambda CPU
14:51​ Securing Lambda Function
17:43 EventBridge Vs SQS/SNS
23:11​ Serverless vs Container
23:45 How to migrate to API Gateway?
25:49 API Gateway with EKS/ECS
28:00 Challenges faced with Serverless

#SolutionsArchitectInterview #Serverless #CloudwithRaj

[shiladityadassharma]

Got offer from aws, your videos are really helpful. I enjoyed and learned a lot from you.Thanks a lot dada.

[tusharanand]

Pure Gold this is. Real Practical stuff for SA Interviews

[manjunathreddy]

Frankly, when I started seeing your videos, I judged based on my programmed mind, that this is not worth. But I gave a chance to defy my mind and I am now addicted to your videos, I watch atleast one video of yours, and yeah You are a nice being. Please make these videos as many as possible 🙇.

[nareshnagpal]

I work in Microsoft Azure mainly. But your videos are you informative and cloud agnostic they can be applied in any cloud solution architecture interviews. Thanks a lot. Really useful content.

[mavrckk]

Wow! You are explaining everything with such clarity. Thank you and Keep it up!

[rodoherty]

Great video! Please keep these "interview question" videos coming! Thanks, Raj!

[udayansaha]

Hi Raj, another wonderful session. Thanks! In this video you mentioned that we can manage lambda provision concurrency using auto-scaling. But I don't how to do that using AWS Auto Scaling. I would like to request you to kindly create a separate video on this topic.

[glennadams]

Always great content from Raj, my fave AWS teacher !

[yuvarajjilla]

Very informative . Initially I thought this video is around 30 mins and it will be boring but it is not. It is very interesting. Thanks for the video !!!

[zshn]

Great video. Use a diffuser on your spot light to get rid of the reflection on the whiteboard.

[khalidsyed]

Awesome Raj! Really helpful with real world examples. Thank you!🙏

[mavrckk]

Can you also make a video on when to use API Gateway over Route 53 for ECS Fargate and EKS?

[pramodbasu]

These r some real-world questions pls make more videos on Interview questions. its really helpful

[machireddyshyamsunder]

Really useful content for AWS serverless learners .... Thanks Raj...!!

[nileshsinha]

🎯 Key Takeaways for quick navigation:

00:00 *🎯 AWS Lambda Overview*
- AWS Lambda is a compute service that eliminates the need for server provisioning.
- Features of AWS Lambda: no servers to manage, automatic scaling, high availability, pay-as-you-go.
- Use cases of AWS Lambda in various scenarios like API, Alexa, and batch jobs.
01:22 *🚀 Other AWS Serverless Services*
- Criteria for AWS serverless services: no servers to manage, auto-scaling, high availability, pay-as-you-go.
- Examples of AWS serverless services: API Gateway, SQS, SNS, S3, DynamoDB.
03:10 *🛠 Handling Lambda Cold Starts*
- Understanding cold start in Lambda and how containers spin up to load code.
- Mitigating cold starts with provisioned concurrency, optimizing code, and leveraging Lambda behaviors.
- Strategies like scheduling provision concurrency and optimizing code to reduce cold start times.
08:37 *💡 Using Custom Container Image with Lambda*
- Ability to use custom container images with AWS Lambda.
- Reusing Lambda advantages with custom container images, but requires slight adjustments for integration.
- Benefits of integrating custom container images with Lambda for better service integration and efficient resource usage.
10:16 *📊 Scaling Mechanism: Lambda vs. Fargate*
- Lambda scales by spinning up a new instance for each traffic connection.
- Fargate operates by handling multiple traffic connections within a container pod.
- Contrasting the scaling approach of Lambda (instance-per-connection) with Fargate (multi-connection support and scaling criteria setup).
12:39 *🔄 Lambda vs. Fargate Configurations*
- Lambda has a maximum runtime of 15 minutes, while Fargate has no time limit.
- Lambda memory limit is 10 GB with 6 CPU cores, unlike Fargate's configurable CPU and memory.
- Reusing container images in Fargate is seamless, while adjustments are needed for Lambda integration.
13:35 *🤝 Lambda vs. Fargate Integrations*
- Lambda seamlessly integrates with various AWS services like S3, EventBridge, SQS, etc.
- Container-based services like Fargate may require additional integration layers for certain service connections.
14:31 *🧠 Configuring Lambda CPU Allocation*
- Only memory configuration is possible for Lambda, which indirectly influences CPU allocation.
- Increasing memory results in higher CPU core allocation for CPU-dependent workloads.
- Monitoring CPU cores can be done through a simple code snippet.
14:56 *🔐 Lambda Function Security*
- Lambda function security involves defining who can invoke the function and which AWS services it interacts with.
- Utilize Lambda resource policies to control invocation sources and permissions.
- Employ dynamic scanning tools for ongoing vulnerability assessment and remediation.
18:00 *🔄 EventBridge vs. SQS for Event Driven Architecture*
- EventBridge offers rule-based target invocation, message transformation, archiving, and replay features that SQS lacks.
- EventBridge allows direct invocation based on message content, unlike SQS which requires a common handling lambda.
- EventBridge provides message archival and selective replay capabilities, enhancing fault tolerance and testing efficiency.
23:21 *🚀 Migrating APIs between Platforms*
- APIs can be migrated between different platforms like API Gateway, Apigee, MuleSoft using OpenAPI version 3.
- Export APIs as Swagger files for easy migration and import into different platforms.
- Use Swagger files along with API Gateway extensions for seamless migration within AWS accounts.
25:41 *🛡️ Integrating API Gateway with EKS and ECS*
- API Gateway can be used with EKS (Elastic Kubernetes Service) by routing traffic through Ingress to Kubernetes pods.
- For ECS (Elastic Container Service), CloudMap facilitates direct integration with API Gateway for task discovery.
28:14 *✨ Addressing Serverless Challenges*
- When asked about serverless challenges, focus on cost and performance optimization as common issues.
- Utilize CloudWatch and CloudWatch Insights to monitor lambda memory allocation and optimize performance.
- Tools like Lambda Power Tuner and strategies to minimize cold starts can aid in overcoming serverless challenges.

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[maneeshadevi]

That's a clear explanation, thank you for helping out!

[omishagupta]

Really informative videos, just one correction though. EKS is not directly integratable with API gateway, it needs to via NLB and not ALB.

[sam]

great session. can we have videos on Kubernetes & Network routing

[vishhal]

Raj, would you please cover on premise to cloud migration interview questions specially challenges in application assessment & migration solution..

[yashlearnscode]

The amount of work you put into each of these videos is amazing. Is there any way to support the channel, I've already subscribed to you. 🙌