Event triggers for Lambda in AWS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the AWS service that triggers the Lambda function.

AWS

Event source for Lambda is [1].

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ARDS

BEC2

CVPC

DS3

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing EC2 which is a compute service, not an event source for Lambda.

S3 is a common event source that triggers Lambda functions when objects are created or deleted.

2fill in blank

medium

Complete the code to specify the event type that triggers Lambda on S3.

AWS

Lambda triggers on S3 event type: [1].

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ADBUpdate

BInstanceStart

CObjectCreated

DNetworkChange

Attempts:

3 left

💡 Hint

Common Mistakes

Selecting unrelated event types like 'InstanceStart' which is for EC2.

The 'ObjectCreated' event triggers Lambda when a new object is added to an S3 bucket.

3fill in blank

hard

Fix the error in the event source mapping code for Lambda trigger.

AWS

Event source mapping: {
  "EventSourceArn": "arn:aws:sqs:us-east-1:123456789012:MyQueue",
  "FunctionName": "MyLambdaFunction",
  "[1]": true
}

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AEnable

BEnabled

CActive

DStatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Enable' which is incorrect property name.

The correct property to enable the event source mapping is 'Enabled'.

4fill in blank

hard

Fill both blanks to configure a CloudWatch event rule to trigger Lambda every 5 minutes.

AWS

Rule = {
  "ScheduleExpression": "[1]",
  "Targets": [{"Arn": "arn:aws:lambda:us-east-1:123456789012:function:MyFunction", "Id": "[2]"}]
}

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Arate(5 minutes)

Bcron(0/5 * * * ? *)

CMyLambdaTarget

DLambdaTrigger

Attempts:

3 left

💡 Hint

Common Mistakes

Using cron expression incorrectly or confusing target Id with ARN.

The schedule expression 'rate(5 minutes)' triggers every 5 minutes. The target Id is a unique name like 'MyLambdaTarget'.

5fill in blank

hard

Fill all three blanks to create an S3 event notification that triggers Lambda on object deletion.

AWS

{
  "LambdaFunctionConfigurations": [
    {
      "LambdaFunctionArn": "arn:aws:lambda:us-east-1:123456789012:function:MyFunction",
      "Events": ["[1]"],
      "Filter": {
        "Key": {
          "FilterRules": [
            {"Name": "[2]", "Value": "[3]"}
          ]
        }
      }
    }
  ]
}

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As3:ObjectRemoved:*

Bs3:ObjectCreated:*

Cprefix

Dsuffix

Attempts:

3 left

💡 Hint

Common Mistakes

Using 's3:ObjectCreated:*' instead of removal event.

The event 's3:ObjectRemoved:*' triggers on object deletion. The filter rule uses 'prefix' and 'suffix' to specify object key filtering.