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Exam AWS-SysOps topic 1 question 620 discussion

Exam question from Amazon's AWS-SysOps
Question #: 620
Topic #: 1
[All AWS-SysOps Questions]

A company has an application that is running on an EC2 instance in one Availability Zone. A SysOps Administrator has been tasked with making the application highly available. The Administrator created a launch configuration from the running EC2 instance. The Administrator also properly configured a load balancer.
What step should the Administrator complete next to make the application highly available?

  • A. Create an Auto Scaling group by using the launch configuration across at least 2 Availability Zones with a minimum size of 1, desired capacity of 1, and a maximum size of 1.
  • B. Create an Auto Scaling group by using the launch configuration across at least 3 Availability Zones with a minimum size of 2, desired capacity of 2, and a maximum of 2.
  • C. Create an Auto Scaling group by using the launch configuration across at least 2 regions with a minimum size of 1, desired capacity of 1, and a maximum size of 1.
  • D. Create an Auto Scaling group by using the launch configuration across at least 3 regions with a minimum size of 2, desired capacity of 2, and a maximum size of 2.
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Suggested Answer: A 🗳️
by frankghost at Sept. 7, 2019, 8:27 p.m.
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frankghost
Highly Voted 2 years, 7 months ago
I would pick B
upvoted 14 times
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DragonPender
Highly Voted 2 years, 7 months ago
Had this question on my exam. Answer is B
upvoted 10 times
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albert_kuo
Most Recent 10 months ago
Selected Answer: B
Setting a minimum size of 2, desired capacity of 2, and maximum size of 2 ensures that there are always at least 2 instances running, providing redundancy and fault tolerance. If one instance becomes unavailable or experiences issues, the Auto Scaling group will automatically launch a replacement instance in one of the other Availability Zones to maintain the desired capacity.
upvoted 1 times
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alexsandroe
2 years, 6 months ago
B. Create an Auto Scaling group by using the launch configuration across at least 3 Availability Zones with a minimum size of 2, desired capacity of 2, and a maximum of 2.
upvoted 1 times
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RicardoD
2 years, 6 months ago
B is the answer by having minimum of 2 instances in each AZ, whenever one instance fails, you still have the other. By having more than one AZ, whenever an AZ becomes Unavailable, you have the others.
upvoted 2 times
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solotvun
2 years, 6 months ago
A is correct. The reason for it is not all regions have 3 AZs. So this makes it very tricky because people think more is better and that's how they get you.
upvoted 1 times
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abhishek_m_86
2 years, 6 months ago
B. Create an Auto Scaling group by using the launch configuration across at least 3 Availability Zones with a minimum size of 2, desired capacity of 2, and a maximum of 2.
upvoted 2 times
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Farina
2 years, 6 months ago
I choose B for HA. C & D can be ruled out.
upvoted 1 times
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jackdryan
2 years, 6 months ago
I'll go with B
upvoted 2 times
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tegucgringo
2 years, 6 months ago
Depends on HA vs. FT Generally, HA means zero downtime, while FT means minimal downtime. Option A suggests Fault-Tolerance - or some downtime Option B suggests HA - or zero downtime Adding in the fact that Option A would be better achieved with Route53 instead of an ELB (to point to the instance), I would say Option B is the right answer
upvoted 3 times
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MFDOOM
2 years, 6 months ago
B. Create an Auto Scaling group by using the launch configuration across at least 3 Availability Zones with a minimum size of 2, desired capacity of 2, and a maximum of 2.
upvoted 2 times
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waterzhong
2 years, 6 months ago
I would pick B
upvoted 1 times
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Iftee
2 years, 6 months ago
Ans: B. High Availaibility - 0 downtime as 1 EC2 will always be avaialible. Option A will take an outage time to start another EC2 if it get failed.
upvoted 1 times
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mrbreeze
2 years, 6 months ago
B is the correct answer. C and D talk at the region level and A is not as "HA" as "B"
upvoted 1 times
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orebaron
2 years, 6 months ago
after many check I think the answer is A, so 2 AZ and been autoscaling mean that if somethin happen and a new instance needs to be created it can in a new AZ, so AT LEAST means that having 2 AZ and 1 instance is enogh
upvoted 1 times
orebaron
2 years, 6 months ago
checked again it's B , because in case the instance is terminated it will be a downtime until new instance is scale,must be 2 instance all the time in different AZ
upvoted 1 times
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AWSTiger
2 years, 6 months ago
Tricky question, but with HA I'd go with the below: B. Create an Auto Scaling group by using the launch configuration across at least 3 Availability Zones with a minimum size of 2, desired capacity of 2, and a maximum of 2.
upvoted 1 times
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AWS_Noob
2 years, 7 months ago
B - Seems more right Let's look at it this way. If it's across only 2 AZ's with min 1 and max 1. If the servery in the 1st AZ crashes, it would mean that there would be a delay in time to get the next instance up. If we use A. That means , 1 AZ or server can fail and will still CONTINUE serving requests
upvoted 3 times
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