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111 multiple-choice questions and 155 flashcards on Cloud Technology and Services, about 33% of the AWS Cloud Practitioner bank. Every one carries a written rationale.
Cloud Technology and Services is one of 4 chapters in CoStudy's AWS Cloud Practitioner bank, and it holds 111 of the bank's 335 multiple-choice questions — roughly 33% of the total. That proportion is not arbitrary: chapters follow the certifying body's published exam outline, and the number of questions in each is set by that domain's published weight, so the share of your practice time this chapter takes matches the share of the real exam it accounts for.
Studying by chapter is worth doing once you have a diagnostic score. A single overall percentage tells you whether you are close; it does not tell you which domain is dragging. Working a weak chapter in isolation, and re-testing it in isolation, is the fastest way to move a score that has stalled — and it is why the mock exams in CoStudy report by domain rather than as one number.
10 questions drawn from this chapter, with the full rationale shown — the controlling principle behind the right answer, and why each wrong option tempts and fails.
A team wants containers without managing EC2 hosts. Best choice?
Answer: B — AWS Fargate serverless container runtime
B, Fargate is serverless containers. A requires host management. C runs functions, not arbitrary containers. D uses EC2 underneath.
Which AWS service is a fully managed container orchestrator that uses Kubernetes APIs?
Answer: B — Amazon EKS
A) ECS is AWS's own container orchestrator, but uses AWS-native APIs, not the Kubernetes API. B) Correct: EKS is a fully managed container orchestrator that uses the Kubernetes API. C) Fargate is a serverless compute option ECS or EKS can run on — not itself the Kubernetes-API orchestrator. D) App Runner runs containerized web apps/APIs directly, with no Kubernetes API involved.
For a replatform migration (Oracle on-prem to Aurora Postgres), the key toolchain is:
Answer: A — AWS DMS with Schema Conversion Tool
A, DMS moves data, SCT converts schema, together enabling engine replatforming. B is unrelated. C is not a replatform tool. D is best practices.
Which is TRUE about AWS Lambda?
Answer: D — Serverless code execution on demand
Lambda runs code without servers, billed per invocation. EBS is block storage. SQS is a queue. EC2 is dedicated VMs.
Best for real-time streaming?
Answer: D — Kinesis Data Streams
A) Amazon SQS decouples producers and consumers but delivers messages individually — no ordered multi-consumer stream replay. B) AWS Glue is serverless ETL for scheduled batch jobs, not continuous stream ingestion. C) Amazon MSK (managed Kafka) also does real-time streaming, but needs more operational setup than Kinesis for this need. D) Correct: Kinesis Data Streams is purpose-built for real-time, ordered stream ingestion and processing.
Amazon CloudWatch is used to:
Answer: D — Metrics, logs, and alarms for AWS
CloudWatch is observability. CloudTrail logs API. Config tracks configuration. GuardDuty detects threats.
Which AWS service helps monitor application metrics, logs, and events?
Answer: D — Amazon CloudWatch
A) CloudTrail logs API calls (who did what), not application metrics. B) AWS Config tracks resource configuration state, not real-time metrics/logs. C) X-Ray traces requests through distributed applications — a narrower use case than general metrics/logs. D) Correct: CloudWatch is AWS's monitoring service for metrics, logs, and events.
Which AWS service is a content delivery network (CDN) that caches content at edge locations to reduce latency?
Answer: A — Amazon CloudFront
CloudFront is AWS's CDN with edge POPs. Route 53 is DNS. Direct Connect is a private link. VPC is virtual networking.
Which is TRUE about security groups versus network ACLs (NACLs) in a VPC?
Answer: C — Detailed line-item usage export
CUR provides granular data. Budgets triggers alerts. Cost Explorer visualizes. Anomaly Detection uses ML.
Which AWS service is a fully managed source-to-deployment pipeline for continuous delivery?
Answer: D — AWS CodePipeline
A) CodeCommit is a source-control (git) service — just one stage, not the full pipeline. B) CodeBuild handles the build stage specifically, not the end-to-end pipeline. C) CodeDeploy handles the deployment stage specifically, not the end-to-end pipeline. D) Correct: CodePipeline is a fully managed source-to-deployment pipeline for continuous delivery.
4 cards from the 155 in this chapter.
What is an AMI?
Amazon Machine Image — a template containing OS, application server, and applications to launch an EC2 instance.
What is the AWS Database Migration Service?
Migrates databases to AWS with minimal downtime. Supports homogeneous and heterogeneous migrations.
What is the maximum S3 bucket size?
Unlimited. There's no limit on the total amount of data or number of objects in a bucket. Individual objects can be up to 5 TB.
What is Amazon SageMaker?
Fully managed ML service for building, training, and deploying models at scale. Notebooks, built-in algorithms, model hosting.
These are a sample. The full Cloud Technology and Services chapter runs 266 items with per-chapter progress tracking, on the web and in the iOS app.
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