Step Functions for workflows in AWS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define the type of the Step Function state.

AWS

"Type": "[1]"

Drag options to blanks, or click blank then click option'

AQueue

BTask

CLambda

DBucket

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Bucket' or 'Queue' which are AWS services but not Step Function state types.

Using 'Lambda' as a type instead of 'Task'.

The Type field in a Step Function state defines what kind of state it is. Task is used to run a unit of work.

2fill in blank

medium

Complete the code to specify the next state in the workflow.

AWS

"Next": "[1]"

Drag options to blanks, or click blank then click option'

AProcessData

BStartState

CEndState

DInitialize

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'EndState' which is usually a terminal state, not a next step.

Using 'StartState' which is the first state, not the next.

The Next field tells the Step Function which state to run after the current one. It should be the name of the next state, here ProcessData.

3fill in blank

hard

Fix the error in the state definition by completing the missing field.

AWS

"End": [1]

Drag options to blanks, or click blank then click option'

A"true"

BTrue

C"True"

Dtrue

Attempts:

3 left

💡 Hint

Common Mistakes

Putting true in quotes, making it a string instead of boolean.

Using capitalized True which is invalid in JSON.

The End field must be a boolean true without quotes to mark the final state.

4fill in blank

hard

Fill both blanks to define a Task state with a Lambda function resource and mark it as the end state.

AWS

{
  "Type": "[1]",
  "Resource": "[2]",
  "End": true
}

Drag options to blanks, or click blank then click option'

ATask

Barn:aws:s3:::mybucket

Carn:aws:lambda:us-east-1:123456789012:function:MyFunction

DChoice

Attempts:

3 left

💡 Hint

Common Mistakes

Using S3 bucket ARN as Resource instead of Lambda ARN.

Using Choice as Type which is for branching, not tasks.

The Type must be Task to run a Lambda function. The Resource is the ARN of the Lambda function.

5fill in blank

hard

Fill all three blanks to create a Choice state that routes based on a variable's value.

AWS

{
  "Type": "Choice",
  "Choices": [
    {
      "Variable": "[1]",
      "StringEquals": "[2]",
      "Next": "[3]"
    }
  ]
}

Drag options to blanks, or click blank then click option'

A$.status

BCompleted

CSuccessState

D$.result

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong JSON path for Variable.

Using a state name that does not exist for Next.

Putting values in wrong fields.

The Variable is the JSON path to check, here $.status. The StringEquals is the value to compare, Completed. The Next is the state to go to if matched, SuccessState.