CLF-C02 Cloud Technology and Services Practice Question
A media company produces video content and stores all videos in Amazon S3. New videos are accessed frequently for the first 30 days after release. After that, access drops significantly, but the company must retain all videos for 5 years for archival purposes. The company wants to minimize storage costs without compromising retrieval speed for the frequently accessed period. Which S3 storage class strategy should the company implement?
⚠ Common exam trap
Many exam-takers confuse S3 Glacier Flexible Retrieval with S3 Glacier Deep Archive, or assume that S3 One Zone-IA is suitable for archival data, but the question explicitly requires 5-year retention and minimal cost, making Deep Archive the correct archival tier.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Store newly uploaded videos in S3 Standard, then use an S3 Lifecycle policy to transition them to S3 Glacier Deep Archive after 30 days.
It uses S3 Standard for the first 30 days to ensure low-latency retrieval for frequently accessed content, then an S3 Lifecycle policy automatically transitions objects to S3 Glacier Deep Archive, which offers the lowest storage cost for long-term archival data. This balances cost and performance by matching the storage class to the access pattern, and the lifecycle transition is seamless with no manual intervention required.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Store all videos in S3 Standard for the entire 5-year retention period.
Why it's wrong here
S3 Standard is optimized for frequently accessed data, but storing all videos in this class for 5 years would incur high costs for data that is rarely accessed after the first 30 days. This does not minimize storage costs.
When this WOULD be correct
This option would be correct if the question stated that all videos must be accessed frequently (e.g., multiple times per day) for the entire 5-year retention period, and cost minimization was not a primary concern. For example, a company that needs immediate retrieval of any video at any time without delay.
- ✗
Store all videos in S3 Glacier Deep Archive immediately upon upload.
Why it's wrong here
S3 Glacier Deep Archive provides the lowest storage cost, but retrieval times range from 12 to 48 hours. This would cause unacceptable delays for the frequent access required during the first 30 days after release.
When this WOULD be correct
This option would be correct if the question stated that all videos are rarely accessed from the moment of upload and must be retained for 5 years with the lowest possible storage cost, with no need for immediate retrieval.
- ✓
Store newly uploaded videos in S3 Standard, then use an S3 Lifecycle policy to transition them to S3 Glacier Deep Archive after 30 days.
Why this is correct
S3 Standard provides low-latency access for the first 30 days. An S3 Lifecycle policy automatically moves data to S3 Glacier Deep Archive after that period, minimizing long-term storage costs while meeting the archival retention requirement.
- ✗
Store newly uploaded videos in S3 One Zone-IA, then transition to S3 Glacier Flexible Retrieval after 30 days.
Why it's wrong here
S3 One Zone-IA is not suitable for archival because it stores data in a single Availability Zone and has lower durability. Additionally, S3 Glacier Flexible Retrieval is more expensive than S3 Glacier Deep Archive for long-term archival, so this option does not minimize cost as effectively.
When this WOULD be correct
This option would be correct if the company's data is non-critical, can be easily recreated, and cost savings are prioritized over high durability. For example, storing temporary video thumbnails or transcoded previews that are accessed frequently for 30 days then rarely, and where retrieval delays of minutes to hours are acceptable.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The CLF-C02 exam frequently reuses these exact scenarios with slightly different constraints.
✓Store newly uploaded videos in S3 Standard, then use an S3 Lifecycle policy to transition them to S3 Glacier Deep Archive after 30 days.Correct answer▾
Why this is correct
S3 Standard provides low-latency access for the first 30 days. An S3 Lifecycle policy automatically moves data to S3 Glacier Deep Archive after that period, minimizing long-term storage costs while meeting the archival retention requirement.
✗Store all videos in S3 Standard for the entire 5-year retention period.Wrong answer — click to see why▾
Why this is wrong here
Storing all videos in S3 Standard for 5 years is cost-inefficient because after 30 days, access drops significantly, and S3 Standard has higher storage costs than archival classes like Glacier Deep Archive. The company wants to minimize costs, so keeping all data in Standard for the full period fails to achieve that.
★ When this WOULD be the correct answer
This option would be correct if the question stated that all videos must be accessed frequently (e.g., multiple times per day) for the entire 5-year retention period, and cost minimization was not a primary concern. For example, a company that needs immediate retrieval of any video at any time without delay.
Why candidates choose this
Candidates may choose this because S3 Standard is the default storage class with no retrieval fees and immediate access, and they may overlook the significant cost savings from lifecycle transitions to lower-cost storage for infrequently accessed data.
✗Store all videos in S3 Glacier Deep Archive immediately upon upload.Wrong answer — click to see why▾
Why this is wrong here
S3 Glacier Deep Archive is designed for long-term archival with retrieval times of 12 hours or more, which would not meet the requirement for frequent access during the first 30 days after release.
★ When this WOULD be the correct answer
This option would be correct if the question stated that all videos are rarely accessed from the moment of upload and must be retained for 5 years with the lowest possible storage cost, with no need for immediate retrieval.
Why candidates choose this
Candidates may focus solely on minimizing cost and overlook the frequent access requirement, assuming that the lowest-cost storage class is always the best choice regardless of access patterns.
✗Store newly uploaded videos in S3 One Zone-IA, then transition to S3 Glacier Flexible Retrieval after 30 days.Wrong answer — click to see why▾
Why this is wrong here
S3 One Zone-IA does not provide the required durability across multiple Availability Zones, and S3 Glacier Flexible Retrieval has retrieval times that may not be suitable for the frequently accessed period. The company needs high durability and immediate retrieval for the first 30 days, which S3 Standard provides.
★ When this WOULD be the correct answer
This option would be correct if the company's data is non-critical, can be easily recreated, and cost savings are prioritized over high durability. For example, storing temporary video thumbnails or transcoded previews that are accessed frequently for 30 days then rarely, and where retrieval delays of minutes to hours are acceptable.
Why candidates choose this
Candidates may think One Zone-IA is cheaper and Glacier Flexible Retrieval offers faster retrieval than Deep Archive, but they overlook the durability requirement and the need for immediate retrieval during the first 30 days.
Analysis generated from the official CLF-C02blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
Go deeper
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About these practice questions
This CLF-C02 question is part of Courseiva's 988-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more way this is tested on CLF-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company ingests sensor data from IoT devices into an Amazon S3 bucket. The data is accessed frequently for the first 30 days, but after that, it is rarely queried. The company’s compliance policy requires all data to be retained for 7 years. The company wants to minimize storage costs by automatically moving data to more cost-effective storage classes as it ages, without any manual intervention. Which Amazon S3 feature should the company configure to meet these requirements?
medium- ✓ A.S3 Lifecycle policy
- B.S3 Object Lock
- C.S3 Replication
- D.S3 Transfer Acceleration
Why A: An S3 Lifecycle policy automates the transition of objects between storage classes based on age. By configuring a lifecycle rule to move objects to S3 Standard-IA or S3 One Zone-IA after 30 days, and then to S3 Glacier Deep Archive after a longer period, the company can meet the 7-year retention requirement while minimizing costs without manual intervention.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CLF-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CLF-C02 exam.