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Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 384 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Associate SAA-C03
Question #: 384
Topic #: 1
[All AWS Certified Solutions Architect - Associate SAA-C03 Questions]

A company runs an application on Amazon EC2 Linux instances across multiple Availability Zones. The application needs a storage layer that is highly available and Portable Operating System Interface (POSIX)-compliant. The storage layer must provide maximum data durability and must be shareable across the EC2 instances. The data in the storage layer will be accessed frequently for the first 30 days and will be accessed infrequently after that time.

Which solution will meet these requirements MOST cost-effectively?

  • A. Use the Amazon S3 Standard storage class. Create an S3 Lifecycle policy to move infrequently accessed data to S3 Glacier.
  • B. Use the Amazon S3 Standard storage class. Create an S3 Lifecycle policy to move infrequently accessed data to S3 Standard-Infrequent Access (S3 Standard-IA).
  • C. Use the Amazon Elastic File System (Amazon EFS) Standard storage class. Create a lifecycle management policy to move infrequently accessed data to EFS Standard-Infrequent Access (EFS Standard-IA).
  • D. Use the Amazon Elastic File System (Amazon EFS) One Zone storage class. Create a lifecycle management policy to move infrequently accessed data to EFS One Zone-Infrequent Access (EFS One Zone-IA).
Show Suggested Answer Hide Answer
Suggested Answer: B 🗳️
by [deleted] at March 10, 2023, 3:34 p.m.
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TariqKipkemei
Highly Voted 1 year, 1 month ago
Selected Answer: C
Multi AZ = both EFS and S3 support Storage classes = both EFS and S3 support POSIX file system access = only Amazon EFS supports
upvoted 14 times
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LazyTs
Highly Voted 10 months ago
Selected Answer: C
POSIX => EFS https://docs.aws.amazon.com/efs/latest/ug/whatisefs.html
upvoted 7 times
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zinabu
Most Recent 3 months ago
Answer:B cause there is no life cycle policy for EFS that will work in S3 only.
upvoted 2 times
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jjcode
4 months, 2 weeks ago
"storage layer will be accessed frequently for the first 30 days and will be accessed infrequently after that time" Was the only reason they added this to trick you?
upvoted 2 times
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pentium75
6 months, 1 week ago
Selected Answer: C
POSIX -> EFS, "maximum data durability" rules out One Zone
upvoted 3 times
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maudsha
8 months, 1 week ago
Selected Answer: C
Both standard and one zone have same durability. https://docs.aws.amazon.com/efs/latest/ug/storage-classes.html Also EFS one zone can work with multiple EC2s in different AZs. But there will be a cost involved when you are accessing the EFS from a different AZ EC2. (EC2 data access charges) https://docs.aws.amazon.com/efs/latest/ug/how-it-works.html So if "all" EC2 instances accessing the files frequently there will be a storage cost + EC2 data access charges if you choose one zone. So i would choose C.
upvoted 1 times
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beast2091
8 months, 1 week ago
Ans: C
upvoted 1 times
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baba365
9 months, 2 weeks ago
Ans: D, one-zone IA for ‘most cost effective’ . https://aws.amazon.com/efs/features/infrequent-access/
upvoted 1 times
AAAWrekng
8 months, 1 week ago
How does D fulfill the data durability requirement? Requirements must be met first, then consider 'most cost effective' - if you go to a tire shop, and say you want 4 new tires as cheap as possible. And they take off 4 tires and put on 2... Then they say you wanted it as cheap as possible...
upvoted 3 times
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Gajendr
6 months, 1 week ago
What about “ The application needs a storage layer that is highly available” and “application on Amazon EC2 Linux instances across multiple Availability Zones ” ?
upvoted 1 times
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Guru4Cloud
10 months, 1 week ago
Selected Answer: C
Use the Amazon Elastic File System (Amazon EFS) Standard storage class. Create a lifecycle management policy to move infrequently accessed data to EFS Standard-Infrequent Access (EFS Standard-IA).
upvoted 2 times
...
[Removed]
1 year ago
Selected Answer: D
Amazon Elastic File System (Amazon EFS) Standard storage class = "maximum data durability"
upvoted 1 times
pentium75
6 months, 1 week ago
"ONE ZONE-IA" does not meet the "maximum data durability" requirement
upvoted 1 times
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Yadav_Sanjay
1 year ago
Selected Answer: D
D - It should be cost-effective
upvoted 2 times
pentium75
6 months, 1 week ago
But D does meet the durability requirement.
upvoted 1 times
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Abrar2022
1 year ago
Selected Answer: C
POSIX file system access = only Amazon EFS supports
upvoted 3 times
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imvb88
1 year, 2 months ago
Selected Answer: C
POSIX + sharable across EC2 instances --> EFS --> A, B out Instances run across multiple AZ -> C is needed.
upvoted 1 times
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WherecanIstart
1 year, 3 months ago
Selected Answer: C
Linux based system points to EFS plus POSIX-compliant is also EFS related.
upvoted 2 times
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fkie4
1 year, 3 months ago
Selected Answer: C
"POSIX-compliant" means EFS. also, file system can be shared with multiple EC2 instances means "EFS"
upvoted 4 times
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KAUS2
1 year, 3 months ago
Selected Answer: C
Option C is the correct answer .
upvoted 1 times
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Ruhi02
1 year, 3 months ago
Answer c : https://aws.amazon.com/efs/features/infrequent-access/
upvoted 1 times
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