AWS Certified Developer - Associate (DVA-C02) Exam notes
Source: Dev.to
AWS X-Ray
X-Ray daemon is a software application that listens for traffic on UDP port 2000, gathers raw segment data, and relays it to the AWS X-Ray API.
Note: End‑of‑support notice – On February 25th, 2027, AWS X‑Ray will discontinue support for AWS X‑Ray SDKs and daemon.
S3
S3 Object Lambda provides different views of data to multiple applications, allowing you to add custom code to process and transform data retrieved from S3 buckets during standard GET, HEAD, and LIST API requests. This enables applications to access a tailored view of the data without needing to create or maintain separate, derivative copies or manage a proxy layer.
Introducing Amazon S3 Object Lambda – use your code to process data as it is being retrieved from S3
DynamoDB
Supports two different kinds of primary keys:
- Partition key – A simple primary key, composed of one attribute known as the partition key.
- Partition key and sort key – Referred to as a composite primary key, this type of key is composed of two attributes.
Secondary indexes
- Global secondary index – An index with a partition key and sort key that can be different from those on the table. The primary key values in global secondary indexes don’t need to be unique.
- Local secondary index – An index that has the same partition key as the table, but a different sort key.