The answer is to restore the backup from 2 days ago to a new EFS file system, then copy the directory to the original file system. This is correct because AWS Backup creates immutable recovery points that can be restored to a new EFS file system, allowing you to mount both the original and restored file systems and selectively copy the deleted directory without affecting the existing data. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this scenario tests your understanding that AWS Backup is designed for point-in-time recovery, not for granular file-level restores within the same file system. A common trap is assuming EFS has a native trash or recycle bin feature, which it does not, or thinking that enabling EFS replication provides the same rollback capability as a backup. Remember the key distinction: backups restore to a new file system, while replication is for continuous disaster recovery, not point-in-time recovery. Memory tip: “New file system, then copy” — think of it as a temporary staging area to extract the lost directory.
SOA-C02 Reliability and Business Continuity Practice Question
This SOA-C02 practice question tests your understanding of reliability and business continuity. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company uses AWS Backup to back up its Amazon EFS file system daily. The backup retention policy is set to 30 days. Recently, a user accidentally deleted a critical directory. The company wants to restore the directory as it existed 2 days ago. What is the MOST cost-effective and quickest way to achieve this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Restore the backup from 2 days ago to a new EFS file system, then copy the directory to the original file system.
Option B is correct because AWS Backup creates recovery points that can be restored to a new EFS file system, and then the specific directory can be copied. Option A is wrong because EFS does not have a native trash feature. Option C is wrong because enabling EFS replication is not a backup replacement and does not provide point-in-time recovery. Option D is wrong because restoring to an on-premises server is unnecessary and slower.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use the EFS console to recover the directory from the .Trash folder.
Why it's wrong here
EFS does not have a .Trash folder.
✗
Enable EFS replication to another region and then fail back.
Why it's wrong here
Replication is for disaster recovery, not point-in-time recovery.
✗
Use AWS Backup to restore the entire file system to an on-premises server, then copy the directory back.
Why it's wrong here
Unnecessarily complex and slower.
✓
Restore the backup from 2 days ago to a new EFS file system, then copy the directory to the original file system.
Why this is correct
This allows selective directory recovery from the backup.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SOA-C02 NAT questions on configuration and troubleshooting.
Reliability and Business Continuity — This question tests Reliability and Business Continuity — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Restore the backup from 2 days ago to a new EFS file system, then copy the directory to the original file system. — Option B is correct because AWS Backup creates recovery points that can be restored to a new EFS file system, and then the specific directory can be copied. Option A is wrong because EFS does not have a native trash feature. Option C is wrong because enabling EFS replication is not a backup replacement and does not provide point-in-time recovery. Option D is wrong because restoring to an on-premises server is unnecessary and slower.
What should I do if I get this SOA-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SOA-C02 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
About these practice questions
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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 uses AWS Backup to back up its Amazon EFS file systems. The SysOps administrator needs to ensure that backups are retained for 7 years to meet compliance requirements. What should the administrator do?
medium
✓ A.Create a backup plan with a lifecycle policy that retains backups for 7 years.
B.Manually delete backups older than 7 years every month.
C.Increase the backup frequency to daily.
D.Configure cross-region backup to copy backups to another region.
Why A: Option C is correct because AWS Backup lifecycle policies allow you to transition backups to cold storage after a specified period and define retention rules up to 100 years. Option A is wrong because increasing backup frequency does not affect retention duration. Option B is wrong because cross-region backup does not extend retention. Option D is wrong because manual deletion is not automated and does not enforce compliance.
Variation 2. An organization needs to back up an Amazon EFS file system daily and retain backups for 30 days. Which AWS service provides a managed backup solution for EFS?
easy
✓ A.AWS Backup
B.Amazon Data Lifecycle Manager (DLM)
C.EFS replication to another region
D.S3 Lifecycle policies
Why A: Correct answer is C. AWS Backup is a fully managed backup service that supports EFS and can schedule daily backups with retention policies. Option A is wrong because S3 Lifecycle policies manage object lifecycle in S3, not EFS backups. Option B is wrong because Data Lifecycle Manager (DLM) manages EBS snapshots, not EFS. Option D is wrong because EFS-to-EFS replication is for continuous replication, not scheduled backup with retention.
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This SOA-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 SOA-C02 exam.
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