You have developed a new web application in us-west-2 that requires six Amazon Elastic Compute Cloud
(EC2) instances running at all times. You have three availability zones available in that region (us-west-2a, uswest-2b, and us-west-2c). You need 100 percent fault tolerance if any single Availability Zone in us-west-2
becomes unavailable. How would you do this, each answer has 2 answers, select the answer with BOTH
correct answers.
A.
Answer 1 – Us-west-2a with two EC2 instances, us-west-2b with two EC2 instances, and us-west-2c with
two EC2 instances. Answer 2 – Us-west-2a with six EC2 instances, us-west-2b with six EC2 instances, and
us-west-2c with no EC2 instances
B.
Answer 1 – Us-west-2a with six EC2 instances, us-west-2b with six EC2 instances, and us-west-2c with no
EC2 instances. Answer 2 – Us-west-2a with three EC2 instances, us-west-2b with three EC2 instances, and
us-west-2c with three EC2 instances.
C.
Answer 1 – Us-west-2a with three EC2 instances, us-west-2b with three EC2 instances, and us-west-2c with
no EC2 instances. Answer 2 – Us-west-2a with three EC2 instances, us-west-2b with three EC2 instances,
and us-west-2c with three EC2 instances.
D.
Answer 1 – Us-west-2a with three EC2 instances, us-west-2b with three EC2 instances, and us-west-2c with
three EC2 instances. Answer 2 – Us-west-2a with four EC2 instances, us-west-2b with two EC2 instances,
and us-west-2c with two EC2 instances.
B
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B – how? anyone
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6 Instance running all the time so B correct.
AZ 2a=6 instances
2b= 6 instances
2c= 0
Which ever AZ goes down there always will be one AZ with 6 instance running.
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B
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