Thursday, 19 February 2026

AWS Cloud Practitioner — Top 100 Must-Know key Points (CLF-C02)

 


136. EC2 Instance Families



General (t), Compute (c), Memory (r/x), Storage (i), GPU (g/p).



137. EC2 Instance Types Naming



Example: m5.large → m = family, 5 = generation, large = size.



138. Spot Fleet



Group of spot instances for cost optimization.



139. Placement Groups



Cluster, Partition, Spread (HPC & big workloads).



140. Amazon Fargate



Serverless containers; no EC2 management.



141. ECS (Elastic Container Service)



Container orchestration (AWS-native, cheaper).



142. EKS (Elastic Kubernetes Service)



Managed Kubernetes (heavy workloads).



143. ECS Anywhere



Run ECS on on-prem or hybrid.



144. Firecracker MicroVM



Technology behind Lambda & Fargate.



145. Lambda Layers



Share common code/resources across Lambda functions.



146. Lambda Provisioned Concurrency



Zero cold start.



147. Lambda Execution Role



Permissions function needs to access AWS resources.



148. Lambda function timeout



Max 15 minutes.



149. AWS Batch Compute Environments



Automate batch workloads on EC2/Spot/Fargate.



150. Amazon Lightsail Containers



Simple container hosting.



151. Spot Blocks



Spot instances with guaranteed run time.



152. AMI (Amazon Machine Image)



Blueprint for EC2 instances.



153. Elastic GPU



Attach GPU to EC2.



154. EC2 Hibernate



Preserves RAM to EBS.



155. ENI (Elastic Network Interface)



Multiple IPs, network cards.



156. EC2 Instance Metadata v2



IMDSv2 more secure (mandatory in exam).



157. Instance Store



Temporary storage, data lost on stop/terminate.



158. Capacity Reservations



Guarantee EC2 capacity for a period.



159. EC2 Dedicated Host



Physical server fully dedicated to you.



160. EC2 Dedicated Instance



Runs on hardware not shared with other accounts.


161. S3 Access Points



Custom access paths for apps.



162. S3 Inventory



Report of objects & metadata.



163. S3 Object ACLs



Legacy permissions (discouraged, but exam asks).



164. S3 Block Public Access



Account-level public block.



165. S3 Bucket Policy



JSON resource-based permission.



166. S3 CORS



Cross-domain access configuration.



167. S3 Select



Query a subset of S3 object.



168. S3 Multi-Part Upload



Recommended for >100MB objects.



169. S3 Transfer Acceleration



Speeds uploads using CloudFront edge locations.



170. S3 Intelligent-Tiering



Automatically moves objects for cost saving.



171. S3 Requester Pays



Requester pays for download.



172. EFS Throughput Modes



Bursting, Provisioned.



173. EFS Storage Classes



Standard, Infrequent Access (IA).



174. EBS Volume Types



gp3, io2, sc1, st1.



175. EBS Multi-Attach



Attach to multiple EC2 at the same time.



176. EBS Snapshots Archive



Cheaper archival storage.



177. EBS Fast Snapshot Restore



High-performance restore.



178. AWS Storage Gateway Types



File, Volume, Tape.



179. AWS Snowball Edge Compute



Includes GPU, compute power.



180. AWS DataSync



Automated large-scale data transfer.



181. AWS Transfer Family



Managed SFTP/FTP/FTPS.



182. AWS Backup Policies



Backup plans, vaults, schedules.



183. Glacier Retrieval Classes



Expedited, Standard, Bulk.



184. S3 Lifecycle Policies



Automate class transitions + deletion.



185. AWS EFS One-Zone



Cheaper but less durable.



186. RDS Multi-AZ Failover



Automatic standby failover.



187. RDS Read Replicas



Read scaling.



188. RDS Automated Backups



Point-in-time recovery.



189. Aurora Global Database



Lag < 1 second between regions.



190. DynamoDB Global Tables



Multi-region active-active.



191. DynamoDB TTL



Automatic expiry of items.



192. DynamoDB Streams



Change data capture for Lambda.



193. DynamoDB Accelerator (DAX)



In-memory cache for Dynamo.



194. ElastiCache Redis



Sub-millisecond caching.



195. OpenSearch Dashboards



Visualization tool (Kibana alternative).



196. Athena Federated Query



Query other sources beyond S3.



197. Glue Crawlers



Scan data & generate schema.



198. Glue Jobs



ETL pipelines.



199. Kinesis Analytics



Real-time SQL analytics on streaming data.



200. Kinesis Shards



Unit of capacity for streams.



201. Redshift Concurrency Scaling



Handles spike workloads.



202. Redshift RA3 Nodes



Managed storage.



203. EMR Serverless



No cluster management.



204. EMR Notebooks



Data exploration with Jupyter.



205. SageMaker Ground Truth



Labeling tool for ML data.



206. Sagemaker Studio



IDE for ML model lifecycle.



207. Transcribe



Speech-to-text.



208. Translate



Language translation.



209. Comprehend



NLP sentiment analysis.



210. Forecast



Time-series forecasting using ML.





🔥 

SET-9 (25 Points) – Developer Tools, DevOps, Monitoring, Cost, Support




211. CloudFormation Drift Detection



Checks differences between stack & deployed resources.



212. CloudFormation Change Sets



Preview changes before applying.



213. CDK (Cloud Development Kit)



Define infra using Python/TS/Java.



214. Elastic Beanstalk Health Monitoring



Green/Yellow/Red indicators.



215. AWS SAM CLI



Test Lambda/APIs locally.



216. CodeStar



Unified DevOps project setup.



217. CodeArtifact



Package dependency management (npm/pypi/maven).



218. CodeGuru Reviewer



AI code review.



219. CodeGuru Profiler



Detects performance bottlenecks.



220. CloudWatch Events (deprecated → EventBridge)



Scheduled & event-driven triggers.



221. CloudWatch Logs Insights



Query logs using SQL-like syntax.



222. CloudWatch Metrics Resolution



Standard: 1 minute

High-resolution: 1–30 sec.



223. CloudWatch Embedded Metric Format



Send custom metrics.



224. CloudTrail Insights



Detect unusual API activity.



225. AWS Health API



Programmatic health alerts.



226. AWS Service Quotas



Manage and request service limit increases.



227. Cost Categories



Group cost data logically.



228. Reservation Utilization Report



See how RIs are used.



229. Savings Plans Utilization



How well commitments are applied.



230. AWS Marketplace Metering



Pay-as-you-go software usage.



231. AWS Concierge Support



Enterprise-only cost help.



232. TAM (Technical Account Manager)



Enterprise support engineer.



233. AWS Abuse Team



Report spam/misuse.



234. AWS Penetration Testing Rules



Allow list for pentesting EC2.



235. Well-Architected Tool



Checks workloads against AWS 5 pillars.


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