Free CLF-C02 practice questions: migration basics

Moving to AWS is a small toolset and one economic idea. Six questions on Snowball, DMS, DataSync and the cloud's cost model — 2026 edition.

Here are 6 typical AWS migration questions in the exam's own style — free, with the answer explained, no sign-up.

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Migration on the CLF-C02 is a small toolset plus one economic idea. You do not need to have run a migration; you need to match a described situation to the right tool, and to understand why moving to the cloud changes the cost model. Both are quick to learn.

The tools, by job

AWS Snowball — a physical device you load and ship. The answer when the data is huge and the network is too slow to upload it in reasonable time.
AWS DataSync — moves large data online, automating transfers between on-premises storage and AWS.
AWS Database Migration Service (DMS) — migrates a database to AWS with minimal downtime.
AWS Migration Hub — tracks the progress of migrations in one place.

The signals in the question point straight at one of these: “petabytes, limited bandwidth” is Snowball; “migrate a database, minimal downtime” is DMS; “move large data online” is DataSync; “track progress” is Migration Hub.

The economic idea: capex to opex

The most-tested reason to migrate is financial. On-premises means buying servers upfront — a large capital expense — and hoping you sized them right. The cloud replaces that with operating expense you pay as you use: no upfront hardware, and the ability to scale without buying capacity in advance. Costs are not eliminated; they become variable and follow usage. Whenever a question frames a benefit of the cloud in money terms, this capital-to-operating shift is almost always the answer.

Hybrid: not everything moves at once

Real migrations are rarely instant. Running some systems on-premises and some in AWS, connected together, is a hybrid approach — common during a phased move. If a question describes that split, “hybrid” is the term, not multi-Region or serverless.

How to use the questions below

Answer each one before opening the explanation, then read past the correct letter to why the other three fail. The distractors are always another migration tool offered for the wrong job, or a cost claim that overstates the benefit. Matching the situation to the right tool and the right economic idea is the whole skill, and the reasoning below drills it.

AWS migration tools matched to jobs: AWS Snowball ships large data physically when bandwidth is limited, AWS DataSync moves large data online, AWS Database Migration Service migrates databases with minimal downtime, and AWS Migration Hub tracks migration progress. A note shows a hybrid setup running part on-premises and part in AWS.

6 free CLF-C02 practice questions

Answers and explanations — no email wall

CLF-C02 Question 1 of 6

A company must transfer petabytes of data to AWS but has limited network bandwidth that would take months to upload. What is designed for this?

Answer: A — AWS Snowball

AWS Snowball is a physical device you load with data and ship to AWS — the answer when the volume is huge and the network is too slow. Why not the others: a browser upload over a constrained link is exactly the problem being avoided. DMS migrates databases, not bulk file transfer. CloudFront is a content delivery network. Big data plus limited bandwidth points to Snowball.

CLF-C02 Question 2 of 6

A company wants to migrate its relational database to AWS with minimal downtime. Which service is built for this?

Answer: A — AWS Database Migration Service (DMS)

AWS Database Migration Service moves databases to AWS while keeping the source usable, minimising downtime. Why not the others: Snowball moves bulk data physically, not a live database migration. CloudWatch is monitoring. Budgets is a cost tool. Migrating a database with little downtime is a DMS job.

CLF-C02 Question 3 of 6

What is AWS DataSync used for?

Answer: A — Automating the transfer of large amounts of data online between on-premises storage and AWS

AWS DataSync automates and accelerates moving large datasets online between on-premises systems and AWS storage. Why not the others: physically shipping devices is Snowball. Schema and database migration is DMS's territory. DDoS protection is Shield. DataSync is the online bulk-transfer tool.

CLF-C02 Question 4 of 6

What does AWS Migration Hub provide?

Answer: A — A single place to track the progress of application migrations

AWS Migration Hub gives you one view to track and monitor migrations across the various migration tools. Why not the others: the physical shipping device is Snowball. Encryption at rest is KMS. A managed relational database is RDS. Migration Hub is about visibility into the migration itself, not moving or storing the data.

CLF-C02 Question 5 of 6

Which describes a financial benefit of migrating from on-premises servers to AWS?

Answer: A — Trading large upfront capital expense for variable, pay-as-you-go operating expense

The cloud replaces buying servers upfront (capital expense) with paying for what you use (operating expense) — a core reason organisations migrate. Why not the others: costs are reduced and made variable, not eliminated. There is no upfront hardware purchase — that is the point. And costs follow usage rather than being fixed regardless of it.

CLF-C02 Question 6 of 6

During a migration, a company keeps some systems running on-premises while running others in AWS, connecting the two. What is this approach called?

Answer: A — A hybrid cloud approach

Running part on-premises and part in AWS, connected together, is a hybrid cloud approach — common during a phased migration. Why not the others: multi-Region is about spreading across AWS Regions. Serverless is about running code without managing servers. An edge deployment is about content delivery near users. On-premises plus AWS together is hybrid.

That is exactly how every question in the course works — answer, explanation, why-not. The real set continues in the practice player: 10 free questions, no sign-up.

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Those 6 questions were the start.

The exam does not test whether you recognise a term — it tests whether you can rule out three plausible answers under time pressure. That is what the explanations above are for, and there are 390 more questions built exactly like them.

Collecting questions yourself

Scattered across forums, of unknown age
Answer keys without reasoning
No idea which domain you are weak in

Practising with a system

390 questions in 6 full tests, CLF-C02 (2026)
Every option explained — including the wrong ones
Readiness per exam domain, and drills for your weakest

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Frequently asked questions

Is this the current CLF-C02 format?

Yes — these questions follow the CLF-C02 exam guide (2026 edition). Migration and the cloud's cost model touch the Cloud Technology and Services and Cloud Concepts domains, and the capital-versus-operating-expense idea is one of the most-tested benefits on the exam.

Are these real exam questions?

No. They are our own questions, written in the style and difficulty of the exam. Reproducing real exam items violates the AWS certification agreement and can get your certification revoked, and a memorised item teaches you nothing about the one you have not seen.

Do I need hands-on migration experience for the exam?

No. CLF-C02 tests which tool fits which migration job — Snowball for bulk offline transfer, DMS for databases, DataSync for online transfer, Migration Hub for tracking — and the economic reasons to move. You will not run a migration in the exam.

What is the one economic idea to remember?

The cloud trades upfront capital expense — buying servers — for variable operating expense you pay as you use. That shift, plus the ability to scale without buying hardware in advance, is the reason migration questions keep returning to cost.

Updated for CLF-C02 (July 2026). The sample questions above are our own work in the style of the exam — not real exam items. The exam itself is set and marked by the certification body.