Google PCA Practice Question: Analyze and optimize technical and business processes
A company is using Cloud Storage for backups and wants to minimize costs. The backups are accessed infrequently and can tolerate retrieval delays. Which storage class is most appropriate?
⚠ Common exam trap
Google Cloud often tests the misconception that 'Coldline' is the cheapest storage class, but Archive is actually the lowest-cost option for data that can tolerate retrieval delays of minutes to hours, not just for data that is rarely accessed.
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
✓
Archive
Archive storage class is the most cost-effective option for backups that are accessed infrequently and can tolerate retrieval delays. It offers the lowest storage cost among Google Cloud Storage classes, with a default retrieval time of minutes to hours, making it ideal for long-term backup data that does not require immediate access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Standard
Why it's wrong here
Standard carries the highest per-gigabyte storage price and is designed for frequently accessed, low-latency data, so it inflates cost for rarely retrieved backups. It is correct for hot, actively served content, not for archival data tolerating retrieval delays.
- ✓
Archive
Why this is correct
Archive storage has the lowest per-gigabyte price of any Cloud Storage class and is designed for data accessed less than once a year. It matches the infrequent access and tolerance for retrieval delays stated in the stem, minimising backup storage cost where latency is acceptable.
- ✗
Coldline
Why it's wrong here
Coldline suits data accessed less than once a year, but its higher per-operation and retrieval charges outweigh savings for backups retrieved occasionally. It is correct for long-term archives, whereas the stem's infrequent-but-real retrieval pattern fits a cheaper-access tier.
- ✗
Nearline
Why it's wrong here
Nearline targets data accessed roughly monthly, so its retrieval and operation costs exceed those of colder classes when backups are rarely touched. It is the right choice for monthly-read data, not for the stem's infrequent access with tolerated delays.
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
Related to this question
Learn chapter
Cloud Storage: Objects and Buckets
Key term
Storage class
A storage class is a category of data storage that defines how data is stored, accessed, retrieved, and billed in a cloud environment.
Key term
Cloud Storage classes
Cloud Storage classes are categories of data storage services offered by cloud providers that differ in performance, availability, cost, and access frequency, allowing users to optimize costs based on how often data is accessed.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCA practice question is part of Courseiva's free Google Cloud 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 PCA exam.