Question 1

How do I deploy a Lambda function with AWS CDK in TypeScript?

Accepted Answer

Use the `aws-cdk-lib/aws-lambda` construct to define the function with your code path and handler. Then run `cdk deploy` to provision it through CloudFormation. Ensure IAM roles and permissions are configured in your stack for execution.

Question 2

AWS CDK vs Terraform: which should I choose?

Accepted Answer

AWS CDK is better if you're committed to AWS and prefer imperative code in languages like TypeScript. Terraform suits multi-cloud setups or if you value declarative HCL and its state management. CDK relies on CloudFormation, while Terraform uses its own providers.

Question 3

Does AWS CDK support all AWS services?

Accepted Answer

CDK aims to cover all AWS services via its Construct Library, but newer features might be experimental or lag behind AWS releases. Check the API reference for module stability, as experimental modules may have incomplete or changing APIs.

Question 4

How to manage secrets like database passwords in AWS CDK?

Accepted Answer

Use AWS Secrets Manager or Systems Manager Parameter Store constructs to handle secrets securely. Avoid hardcoding values in code; instead, reference them via CDK context or environment variables during synthesis.

Question 5

What happens if my AWS CDK deployment fails?

Accepted Answer

Failed deployments trigger a CloudFormation rollback, but debugging requires checking CloudFormation events in the AWS Console. Use `cdk diff` to preview changes and validate resource limits or policy errors before deploying.

Question 6

Can I use AWS CDK with existing CloudFormation stacks?

Accepted Answer

Yes, via the `CfnInclude` class to import resources, but it can be complex and may not support all CloudFormation features seamlessly. Gradual migration or re-creating stacks in CDK code is often recommended.

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