Free, exam-focused explainers for the AWS services and concepts tested on the CLF-C02, SAA-C03, and DEA-C01 exams. Each guide covers what the service does, what your exam actually tests, and a real scenario question with the reasoning behind the answer. New topics are added regularly.
201 topics
SAA-C03ALB vs NLBAWS exam study guide + practice question.SAA-C03Amazon API GatewayAWS exam study guide + practice question.DEA-C01Amazon AthenaServerless SQL straight against S3.SAA-C03Amazon Aurora BacktrackAWS exam study guide + practice question.SAA-C03Amazon AuroraAWS exam study guide + practice question.SAA-C03Amazon Aurora Global DatabaseAWS exam study guide + practice question.SAA-C03Amazon Aurora ServerlessAWS exam study guide + practice question.SAA-C03Amazon CloudFrontThe CDN that caches at the edge.All examsAmazon CloudWatchMetrics and alarms (vs CloudTrail).SAA-C03Amazon CognitoAWS exam study guide + practice question.All examsAmazon ComprehendAWS exam study guide + practice question.SAA-C03Amazon DetectiveAWS exam study guide + practice question.SAA-C03Amazon DocumentDBAWS exam study guide + practice question.SAA-C03Amazon DynamoDBNoSQL at scale and capacity modes.All examsAmazon EC2Virtual servers and the four pricing models.SAA-C03Amazon ECRAWS exam study guide + practice question.SAA-C03Amazon ECSAWS exam study guide + practice question.SAA-C03Amazon EFSAWS exam study guide + practice question.SAA-C03Amazon EKSAWS exam study guide + practice question.SAA-C03Amazon ElastiCacheAWS exam study guide + practice question.DEA-C01Amazon EMRAWS exam study guide + practice question.DEA-C01Amazon EMR ServerlessAWS exam study guide + practice question.SAA-C03Amazon EventBridgeAWS exam study guide + practice question.DEA-C01Amazon EventBridge PipesAWS exam study guide + practice question.SAA-C03Amazon FSxAWS exam study guide + practice question.SAA-C03Amazon FSxAWS exam study guide + practice question.SAA-C03Amazon GuardDutyAWS exam study guide + practice question.SAA-C03Amazon InspectorAWS exam study guide + practice question.DEA-C01Amazon Keyspaces (for Apache Cassandra)AWS exam study guide + practice question.DEA-C01Amazon Kinesis Data StreamsReal-time streaming (vs Firehose).CLF-C02Amazon LightsailAWS exam study guide + practice question.SAA-C03Amazon MacieAWS exam study guide + practice question.DEA-C01Amazon Managed GrafanaAWS exam study guide + practice question.SAA-C03Amazon MQAWS exam study guide + practice question.DEA-C01Amazon MSK (Managed Kafka)AWS exam study guide + practice question.SAA-C03Amazon NeptuneAWS exam study guide + practice question.DEA-C01Amazon OpenSearch ServiceAWS exam study guide + practice question.DEA-C01Amazon QuickSightAWS exam study guide + practice question.All examsAmazon RDSManaged databases: Multi-AZ vs Read Replicas.SAA-C03Amazon RDS ProxyAWS exam study guide + practice question.DEA-C01Amazon RedshiftThe data warehouse for heavy BI.DEA-C01Amazon Redshift ServerlessAWS exam study guide + practice question.All examsAmazon RekognitionAWS exam study guide + practice question.SAA-C03Amazon Route 53DNS and the routing policies to know.All examsAmazon S3Object storage, storage classes & lifecycle rules.DEA-C01Amazon SageMakerAWS exam study guide + practice question.All examsAmazon SNSAWS exam study guide + practice question.All examsAmazon SQSAWS exam study guide + practice question.All examsAmazon SWF (Simple Workflow Service)AWS exam study guide + practice question.DEA-C01Amazon TimestreamAWS exam study guide + practice question.SAA-C03Amazon VPCSubnets, gateways, and the NAT vs IGW trap.SAA-C03Amazon VPC LatticeAWS exam study guide + practice question.SAA-C03API Gateway TypesAWS exam study guide + practice question.DEA-C01Athena Federated QueryAWS exam study guide + practice question.DEA-C01Athena vs RedshiftAWS exam study guide + practice question.SAA-C03Auto ScalingScale EC2 with demand, automatically.SAA-C03Auto Scaling PoliciesAWS exam study guide + practice question.All examsAWS AmplifyAWS exam study guide + practice question.SAA-C03AWS App RunnerAWS exam study guide + practice question.SAA-C03AWS AppSyncAWS exam study guide + practice question.CLF-C02AWS ArtifactAWS exam study guide + practice question.SAA-C03AWS BackupAWS exam study guide + practice question.SAA-C03AWS Backup Vault LockAWS exam study guide + practice question.All examsAWS BatchAWS exam study guide + practice question.CLF-C02AWS BudgetsAWS exam study guide + practice question.SAA-C03AWS Cloud MapAWS exam study guide + practice question.SAA-C03AWS CloudFormationAWS exam study guide + practice question.All examsAWS CloudTrailAPI activity auditing (vs CloudWatch).All examsAWS CodeBuildAWS exam study guide + practice question.All examsAWS CodeCommitAWS exam study guide + practice question.All examsAWS CodeDeployAWS exam study guide + practice question.All examsAWS CodePipelineAWS exam study guide + practice question.All examsAWS Compute OptimizerAWS exam study guide + practice question.All examsAWS ConfigAWS exam study guide + practice question.SAA-C03AWS Control TowerAWS exam study guide + practice question.All examsAWS Cost Allocation TagsAWS exam study guide + practice question.CLF-C02AWS Cost ExplorerAWS exam study guide + practice question.DEA-C01AWS DataSyncAWS exam study guide + practice question.SAA-C03AWS Direct ConnectAWS exam study guide + practice question.SAA-C03AWS Disaster Recovery StrategiesAWS exam study guide + practice question.DEA-C01AWS DMS (Database Migration Service)AWS exam study guide + practice question.CLF-C02AWS Edge LocationsAWS exam study guide + practice question.SAA-C03AWS Elastic BeanstalkAWS exam study guide + practice question.SAA-C03AWS Firewall ManagerAWS exam study guide + practice question.SAA-C03AWS Global AcceleratorAWS exam study guide + practice question.DEA-C01AWS Glue DataBrewAWS exam study guide + practice question.DEA-C01AWS GlueServerless ETL, crawlers & the Data Catalog.DEA-C01AWS Glue WorkflowsAWS exam study guide + practice question.All examsAWS IAMUsers, roles, policies & least privilege.SAA-C03AWS IAM Identity Center (SSO)AWS exam study guide + practice question.All examsAWS KMSAWS exam study guide + practice question.DEA-C01AWS Lake FormationAWS exam study guide + practice question.All examsAWS LambdaServerless compute and event triggers.SAA-C03AWS License ManagerAWS exam study guide + practice question.SAA-C03AWS Network FirewallAWS exam study guide + practice question.All examsAWS OrganizationsAWS exam study guide + practice question.SAA-C03AWS OutpostsAWS exam study guide + practice question.CLF-C02AWS Pricing and the Free TierAWS exam study guide + practice question.SAA-C03AWS PrivateLinkAWS exam study guide + practice question.CLF-C02AWS Regions and Availability ZonesAWS exam study guide + practice question.SAA-C03AWS Secrets ManagerAWS exam study guide + practice question.SAA-C03AWS Service CatalogAWS exam study guide + practice question.SAA-C03AWS ShieldAWS exam study guide + practice question.SAA-C03AWS Site-to-Site VPNAWS exam study guide + practice question.DEA-C01AWS SnowballAWS exam study guide + practice question.SAA-C03AWS Step FunctionsAWS exam study guide + practice question.SAA-C03AWS Storage GatewayAWS exam study guide + practice question.SAA-C03AWS STS (Security Token Service)AWS exam study guide + practice question.CLF-C02AWS Support PlansAWS exam study guide + practice question.SAA-C03AWS Systems ManagerAWS exam study guide + practice question.SAA-C03AWS Transit GatewayAWS exam study guide + practice question.CLF-C02AWS Trusted AdvisorAWS exam study guide + practice question.SAA-C03AWS WAFAWS exam study guide + practice question.SAA-C03AWS WAF Rule TypesAWS exam study guide + practice question.SAA-C03AWS X-RayAWS exam study guide + practice question.SAA-C03Blue/Green Deployment on AWSAWS exam study guide + practice question.All examsCLF-C02 vs SAA-C03AWS exam study guide + practice question.SAA-C03CloudFront CachingAWS exam study guide + practice question.SAA-C03CloudFront Origin FailoverAWS exam study guide + practice question.SAA-C03CloudFront Signed URLs and CookiesAWS exam study guide + practice question.All examsCloudWatch AlarmsAWS exam study guide + practice question.All examsCloudWatch Logs InsightsAWS exam study guide + practice question.DEA-C01Data Lake vs Data WarehouseAWS exam study guide + practice question.DEA-C01Data PartitioningAWS exam study guide + practice question.DEA-C01DynamoDB Accelerator (DAX)AWS exam study guide + practice question.SAA-C03DynamoDB Capacity ModesAWS exam study guide + practice question.SAA-C03DynamoDB Global TablesAWS exam study guide + practice question.DEA-C01DynamoDB StreamsAWS exam study guide + practice question.DEA-C01DynamoDB TTL (Time to Live)AWS exam study guide + practice question.SAA-C03EBS SnapshotsAWS exam study guide + practice question.SAA-C03EBS Volume TypesAWS exam study guide + practice question.SAA-C03EBS vs EFS vs S3Block vs file vs object storage, decided.SAA-C03EC2 Auto RecoveryAWS exam study guide + practice question.All examsEC2 Instance TypesAWS exam study guide + practice question.SAA-C03EC2 Placement GroupsAWS exam study guide + practice question.All examsEC2 User DataAWS exam study guide + practice question.All examsEC2 vs LambdaAWS exam study guide + practice question.SAA-C03ECS vs EKS vs FargateAWS exam study guide + practice question.SAA-C03EFS Storage ClassesAWS exam study guide + practice question.SAA-C03Elastic IP AddressesAWS exam study guide + practice question.SAA-C03Elastic Load BalancingALB vs NLB vs Gateway.SAA-C03Elastic Network Interfaces (ENI)AWS exam study guide + practice question.SAA-C03ElastiCacheAWS exam study guide + practice question.SAA-C03Fargate vs EC2 Launch TypeAWS exam study guide + practice question.SAA-C03Gateway vs Interface VPC EndpointsAWS exam study guide + practice question.DEA-C01Glue Crawlers vs ETL JobsAWS exam study guide + practice question.DEA-C01Glue vs EMRAWS exam study guide + practice question.SAA-C03IAM Identity FederationAWS exam study guide + practice question.SAA-C03IAM Permission BoundariesAWS exam study guide + practice question.SAA-C03IAM Policy ConditionsAWS exam study guide + practice question.SAA-C03IAM Roles vs PoliciesAWS exam study guide + practice question.SAA-C03Instance Store vs EBSAWS exam study guide + practice question.DEA-C01Kinesis Data AnalyticsAWS exam study guide + practice question.DEA-C01Kinesis Data FirehoseAWS exam study guide + practice question.DEA-C01Kinesis Enhanced Fan-OutAWS exam study guide + practice question.DEA-C01Kinesis Shards and CapacityAWS exam study guide + practice question.DEA-C01Kinesis vs SQSAWS exam study guide + practice question.SAA-C03KMS Key RotationAWS exam study guide + practice question.SAA-C03Lambda ConcurrencyAWS exam study guide + practice question.All examsLambda LayersAWS exam study guide + practice question.All examsLambda vs FargateAWS exam study guide + practice question.SAA-C03NAT GatewayAWS exam study guide + practice question.DEA-C01Parquet vs ORC vs CSVAWS exam study guide + practice question.SAA-C03RDS Multi-AZ vs Read ReplicasAWS exam study guide + practice question.SAA-C03RDS vs DynamoDBAWS exam study guide + practice question.DEA-C01Redshift Concurrency ScalingAWS exam study guide + practice question.DEA-C01Redshift Distribution KeysAWS exam study guide + practice question.DEA-C01Redshift SpectrumAWS exam study guide + practice question.SAA-C03Resource-Based PoliciesAWS exam study guide + practice question.SAA-C03Route 53 Health ChecksAWS exam study guide + practice question.SAA-C03Route 53 Routing PoliciesAWS exam study guide + practice question.SAA-C03S3 Access PointsAWS exam study guide + practice question.SAA-C03S3 Batch OperationsAWS exam study guide + practice question.SAA-C03S3 EncryptionAWS exam study guide + practice question.SAA-C03S3 Event NotificationsAWS exam study guide + practice question.All examsS3 Intelligent-TieringAWS exam study guide + practice question.SAA-C03S3 Lifecycle and ReplicationAWS exam study guide + practice question.SAA-C03S3 Object LockAWS exam study guide + practice question.SAA-C03S3 Requester PaysAWS exam study guide + practice question.DEA-C01S3 SelectAWS exam study guide + practice question.All examsS3 Storage ClassesAWS exam study guide + practice question.SAA-C03S3 Transfer AccelerationAWS exam study guide + practice question.All examsS3 VersioningAWS exam study guide + practice question.SAA-C03S3 vs EBSAWS exam study guide + practice question.All examsSAA-C03 vs DEA-C01AWS exam study guide + practice question.All examsSavings Plans vs Reserved InstancesAWS exam study guide + practice question.SAA-C03Security Groups vs NACLsStateful vs stateless firewalls.SAA-C03SNS Message FilteringAWS exam study guide + practice question.All examsSpot vs On-Demand vs ReservedAWS exam study guide + practice question.SAA-C03SQS Dead-Letter QueuesAWS exam study guide + practice question.All examsSQS vs SNSAWS exam study guide + practice question.All examsSSM Parameter StoreAWS exam study guide + practice question.All examsStep Functions vs SWFAWS exam study guide + practice question.CLF-C02The AWS Shared Responsibility Model, Explained (2026)Who secures what — AWS vs you.CLF-C02The AWS Well-Architected FrameworkAWS exam study guide + practice question.DEA-C01The Glue Data CatalogAWS exam study guide + practice question.SAA-C03VPC CIDR and SubnettingAWS exam study guide + practice question.SAA-C03VPC EndpointsAWS exam study guide + practice question.SAA-C03VPC Flow LogsAWS exam study guide + practice question.SAA-C03VPC PeeringAWS exam study guide + practice question.All examsWhich AWS Certification Should You Take First? (2026)AWS exam study guide + practice question.
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