If you are cramming for the AWS Machine Learning AI Specialty exam you will face questions that look like a multiple choice ransom note. The two usual suspects are Bedrock and SageMaker. One is great for managed foundation model inference with minimal babysitting, the other is built for custom training full MLOps and fine control. This guide walks you through a repeatable checklist so you can answer fast and sound smart in the exam room.
Stop skimming like the question is a terms and conditions page. Note whether the focus is training, inference latency, data privacy, cost or operational maintenance. Keywords to watch for include managed foundation model, prompt based inference, batch processing, hyperparameter tuning and MLOps pipeline. Those keywords are the exam whisperers.
Here is the blunt truth. Choose Bedrock when the question asks for managed foundation models, prompt based inference or low ops effort. Choose SageMaker when custom training, hyperparameter tuning, full lifecycle MLOps or model registry features are required. SageMaker is the heavy duty toolbox. Bedrock is the hands free option for generative AI workloads.
Exam writers love security caveats. Always verify encryption at rest and in transit, use of VPC endpoints, and least privilege IAM roles for data access. For generative AI questions confirm data residency, content filtering and logging requirements. If the prompt mentions sensitive data or regulatory compliance you are probably pointing at a VPC enabled SageMaker setup or a specific data residency requirement with Bedrock configuration.
Cost logic will save your exam life more often than you think. If the workload is bursty and inference only a pay per call model using Bedrock might be cheaper. If heavy training or continuous batch jobs are required then provisioned instances in SageMaker with managed spot or distributed training will usually be more cost efficient. Also think autoscaling and cold start impacts on latency.
Write one strong sentence that ties the core requirement to the service capability. Then add one sentence about a trade off. Example answer style for the exam would be something like this
If you get stuck pick the option that best matches the primary requirement and then write one clear sentence about security or cost to support it. That single sentence often turns a guess into a defensible answer in the certification review. Remember to mention MLOps needs if the question implies lifecycle management or continuous delivery pipelines.
Use this framework in practice questions to build speed. You will sound decisive and technically correct which is basically what the exam wants from you. Also breathe. You can still pass even if you spill coffee on your notes.
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