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Exam AWS Certified Solutions Architect - Associate SAA-C02 All Questions

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Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 138 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Associate SAA-C02
Question #: 138
Topic #: 1
[All AWS Certified Solutions Architect - Associate SAA-C02 Questions]

A company relies on an application that needs at least 4 Amazon EC2 instances during regular traffic and must scale up to 12 EC2 instances during peak loads.
The application is critical to the business and must be highly available.
Which solution will meet these requirements?

  • A. Deploy the EC2 instances in an Auto Scaling group. Set the minimum to 4 and the maximum to 12, with 2 in Availability Zone A and 2 in Availability Zone B.
  • B. Deploy the EC2 instances in an Auto Scaling group. Set the minimum to 4 and the maximum to 12, with all 4 in Availability Zone A.
  • C. Deploy the EC2 instances in an Auto Scaling group. Set the minimum to 8 and the maximum to 12, with 4 in Availability Zone A and 4 in Availability Zone B.
  • D. Deploy the EC2 instances in an Auto Scaling group. Set the minimum to 8 and the maximum to 12, with all 8 in Availability Zone A.
Show Suggested Answer Hide Answer
Suggested Answer: C 🗳️
by Asad85 at Aug. 10, 2020, 8:29 a.m.
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josebormo
Highly Voted 3 years, 7 months ago
C, HA -> 2AZ with minimun resources (4)
upvoted 94 times
zenico
3 years, 6 months ago
That's for fault tolerant, stricter standards than HA.
upvoted 6 times
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prac_cert
3 years, 5 months ago
C is an option we select when we are talking about fault tolerance not HA.
upvoted 2 times
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noahsark
3 years, 5 months ago
My answer is A: High availability = two in Availability Zone A and two in Availability Zone B Fault-tolerant = four in Availability Zone A and four in Availability Zone B Source: AWS Exam Readiness
upvoted 27 times
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kdhondge
3 years, 5 months ago
A fault tolerant environment has no service interruption but a significantly higher cost, while a highly available environment has a minimal service interruption. We don't need fault tolerant , just HA can be get using 2 EC1in az1 and 2 EC2 in another. for that option A is good
upvoted 5 times
zesss24
3 years, 2 months ago
an application that requires at least four Amazon EC2 instances for normal traffic. It's C
upvoted 1 times
wpassarella
3 years ago
4 in total not 4 in the same AZ.
upvoted 1 times
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sgupta_22
Highly Voted 3 years, 7 months ago
C is correct. It requires HA and if one AZ is down then at least 4 instances will be active in another AZ which is key for this question
upvoted 65 times
MuscularEngineer
3 years, 6 months ago
Yes exactly
upvoted 2 times
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prac_cert
3 years, 5 months ago
No. there is a small difference between HA and FT. Read. C is for FT.
upvoted 2 times
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noahsark
3 years, 5 months ago
My answer is A: if High availability = two in Availability Zone A and two in Availability Zone B if Fault-tolerant = four in Availability Zone A and four in Availability Zone B Source: AWS Exam Readiness
upvoted 11 times
samuel1999
3 years, 4 months ago
go study!
upvoted 2 times
SDikeman62
3 years, 1 month ago
This type of comment do not help. Go Study? Study what? Please provide references to study. Making these general comments are useless.
upvoted 10 times
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ying162
3 years, 5 months ago
It cannot be A: If you lose one AZ, then you do not fulfill the min of 4. Answer is C:
upvoted 6 times
Jack1313
3 years, 5 months ago
Auto scaling automatically launches a new instance, hence why I believe A is the correct answer.
upvoted 1 times
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retne
2 years, 4 months ago
If you lose one AZ, the ASG will deploy in unaffected AZ.
upvoted 1 times
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induna
3 years, 4 months ago
listen to this guy, it makes sense
upvoted 1 times
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Bechir
3 years, 6 months ago
no, A is enough, with minimum 4 EC2 , 2 in each AZ, if one zone fails the ASG will deploy the 2 failing on the other remaining AZ, hence you will be always with 4 EC2
upvoted 10 times
UpsetUser
3 years, 5 months ago
What if one AZ fails,,, since workload is critical, it will take some minutes to make 2 servers up in another az.. which will compromise the load... thats y C is the correct asnwer
upvoted 10 times
noahsark
3 years, 5 months ago
High Availability is different from Fault-Tolerant.
upvoted 2 times
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nayan22032002
Most Recent 3 weeks, 2 days ago
Selected Answer: A
Answer is A: High availability = two in Availability Zone A and two in Availability Zone B Fault-tolerant = four in Availability Zone A and four in Availability Zone B
upvoted 1 times
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mfaktas
1 year, 5 months ago
Selected Answer: C
No mentions for cost perspective so we have to stick with HA which is to have min 4 instances on different az's totall of 8 running. A doesnt sound bad but in a zone failure scenario we will lose the highly availablity waiting for the ASG to lunch 2 more instances which we dont know how much time needed to get them fully available.
upvoted 1 times
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YanisGTR
2 years, 1 month ago
We start with 4 so "2/2" and we able to add more up to 12 with ASG to be "4/4" so for me ans = A
upvoted 2 times
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YanisGTR
2 years, 1 month ago
that needs at least 4 Amazon EC2 instances during regular traffic ?! why you guys go with c 8 ?! he said regular 4 ,,,, "2 in AZ a & 2 in AZ b" ans = A
upvoted 1 times
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KVK16
2 years, 5 months ago
It takes time for EC2 instance to scale as per load
upvoted 1 times
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Six_Fingered_Jose
2 years, 5 months ago
Selected Answer: C
answer is C because what if one of the AZ shuts down? only 2 instances are left on the other AZ and the questions states below > The application is critical to the business and must be highly available. with C, even if one of the AZ fails u still have the min of 4 instances up and running
upvoted 1 times
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BlueNoodle
2 years, 6 months ago
I think C is correct. In question, it said "at least 4". It implies more is better. It doesn't mention "cost-effective". Money is not an issue to the company.
upvoted 1 times
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qax2022
2 years, 7 months ago
Selected Answer: C
2 az, min 4 on each, so if one az is down, you still have min 4.
upvoted 1 times
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DaVaBa
2 years, 7 months ago
Selected Answer: A
We need HA, not Fault Tolerance! So only 4 instances in 2 zone!
upvoted 1 times
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1sid
2 years, 7 months ago
A is the best pick. It reduces cost
upvoted 1 times
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jopeg
2 years, 7 months ago
Selected Answer: D
The text says "(...) needs at least 4 Amazon EC2 instances (...) The application is critical to the business and must be highly available." So in my opinion we need to have two AZ with a min of 4 instances to ensure if we have a fail in one AZ the other one have 4 instances running" --> So I vote D
upvoted 1 times
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ChiefArch
2 years, 7 months ago
Selected Answer: A
2 instances in 2 AZs with ASG set to 12 is more than enough to meet the requirements here. If AZ-1 fails, AZ-2 will scale to pick up the load using ASG. C is overkill!
upvoted 1 times
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HereToReAssureMyself
2 years, 8 months ago
Selected Answer: C
I think its c, what if there is an outage in one az ? with option A we are left with 2 ec2 instances which is not HA
upvoted 1 times
pkhdog22
2 years, 8 months ago
Yeah this question could be interpreted differently depending on how you see it. A is still HA as in there are still instances up even when one AZ is down. (With 2 ec2 instances). But it's not Fault-Tolerance as it does not meet the minimum number of instances (4) the process requires.
upvoted 1 times
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123dap1
2 years, 8 months ago
Selected Answer: C
The key here is that it is critical. thus if one availability zone should collapse in the case of a disaster there must be at least 4 EC2 in the remaining availability zone for continuity
upvoted 1 times
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johnny661
2 years, 9 months ago
Selected Answer: C
HA, each AZ should have 4 instances.
upvoted 2 times
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C (25%)
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