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78 multiple-choice questions and 32 flashcards on Cloud Concepts, about 23% of the AWS Cloud Practitioner bank. Every one carries a written rationale.
Cloud Concepts is one of 4 chapters in CoStudy's AWS Cloud Practitioner bank, and it holds 78 of the bank's 335 multiple-choice questions — roughly 23% 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.
Which is NOT one of the six Well-Architected pillars?
Answer: C — Scalability pillar of the framework
C, Scalability is a goal, not a named pillar. The six pillars are Operational Excellence, Security, Reliability, Performance Efficiency, Cost Optimization, Sustainability.
Which resource exists globally and is available in every Region by default?
Answer: A — IAM users, roles, and policies
A, IAM is global. B, C are regional and must be created per Region. D bucket names are global but data sits in one Region.
Which is the BEST reason a company would choose AWS Regions in multiple geographies?
Answer: D — Reduce latency for global users, meet data
A) Correct: Reduce latency for global users, meet data. Other options describe different AWS services that are common confusions.
A sustainability-focused architect selects a Region by considering what?
Answer: D — Carbon intensity plus latency and compliance
D, Region selection by carbon intensity is a Sustainability lever, balanced against latency and compliance. A, B, C each miss dimensions.
Which pillar emphasizes measuring efficiency per unit of work such as carbon per request?
Answer: A — Sustainability pillar principles
A, Sustainability's principles include maximizing utilization measured per unit of work. B measures perf but not carbon. C is procedures. D is fault tolerance.
Which deployment model best describes an architecture where some workloads run on-premises and some run in AWS, with secure connectivity between them?
Answer: D — Detailed line-item usage export
CUR provides granular data. Budgets triggers alerts. Cost Explorer visualizes. Anomaly Detection uses ML.
What does EC2 stand for?
Answer: A — Elastic Compute Cloud
EC2 = Elastic Compute Cloud, AWS's IaaS for resizable virtual servers. B/C/D are plausible backronyms that don't match the official AWS name.
Which Well-Architected pillar was added to the framework in December 2021?
Answer: C — Sustainability pillar practices
C, Sustainability was added in 2021. A, B, D are original pillars from the initial framework.
Which statement best describes elasticity in the cloud?
Answer: B — Resources scale automatically up AND down based on real
A) Correct: Resources scale automatically up AND down based on real. Other options describe different AWS services that are common confusions.
Which statement correctly differentiates an AWS Region from an Availability Zone?
Answer: B — Region contains multiple isolated AZs
A Region is a geographic area with multiple AZs (each 1+ physically separated data centers). The other options misstate the hierarchy.
2 cards from the 32 in this chapter.
What is Amazon S3?
Simple Storage Service — scalable object storage with 99.999999999% (11 nines) durability.
What is the AWS Architecture Center?
A resource with reference architectures, diagrams, and technical guidance for building on AWS.
These are a sample. The full Cloud Concepts chapter runs 110 items with per-chapter progress tracking, on the web and in the iOS app.
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