Step Functions

Question 1

What are Step Functions?

What are its 6 features?

Answer 1

• Serverless workflows (Flow chart) business rules
• Graphical console
• Types (Standard, Express for streaming data)
• JSON format
• States (Pass, Task, Choice, Wait, Succeed, Fail…)
• Task State (Unit of work)
• Task Activities
• Parallel States

Question 2

In Step Functions, Which format does the Amazon States Language use?

Answer 2

JSON

Question 3

In Step Functions, What are the 2 types of state machines?

Answer 3

• Standard (1 Year, general purpose, log workloads)

- Express (5 minutes,streaming data, short workloads)

Question 4

This AWS service lets you coordinate multiple AWS services into a serverless workflow using State Machines

Answer 4

Step Functions

Question 5

In Step Functions, What are the 8 state types for a state machine?

Answer 5

• Pass
• Task (A Lambda ARN)
• Choice
• Wait
• Succeed
• Fail
• Parallel
• Map

Question 6

How does does a step function task perform work?

Answer 6

AWS Lambda

Calling API actions for other services

Question 7

Use case in Step Function

Answer 7

• We have a Step Function
• We have a S3 Bucket
• We have A PutItem rule in EventBridge with our Step function as a target and our S3 bucket as a service
• We have a Lambda
• Somebody uploads an image in S3
• We have a Data Event type Trail on CloudTrail listening to the S3 Bucket
• The state machine of that rule is XXX

Question 8

MIn 32:00

Answer 8

min 32