Questions 58 to 60

Explanations for questions 58 to 60

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Question 58

An application receives a high traffic load between 7:30 am and 9:30 am daily. The application uses an Auto Scaling group to maintain three instances most of the time, but during the peak period, it requires six instances.

How can a solutions architect configure Auto Scaling to perform a daily scale-out event at 7:30 am, and a scale-in event at 9:30 am to account for the peak load?

  1. Use a Simple scaling policy.
  2. Use a Scheduled scaling policy.
  3. Use a Dynamic scaling policy.
  4. Use a Step scaling policy.

Correct Answer: 2

Explanation: The following scaling policy options are available:

The Simple policy maintains a current number of instances; you can manually change the ASGs min/desired/max and attach/detach instances.

The Scheduled policy is used for predictable load changes( can be a single event or a recurring schedule).

The Dynamic (event-based) policy scales in response to an event/alarm.

The Step policy configures multiple scaling steps in response to multiple alarms.

INCORRECT: “Use a Simple scaling policy.” is incorrect. Please refer to the description above.

CORRECT: “Use a Scheduled scaling policy.” is the correct answer.

INCORRECT: “Use a Dynamic scaling policy.” is incorrect. Please refer to the description above.

INCORRECT: “Use a Step scaling policy.” is incorrect. Please refer to the description above.

References: https://docs.aws.amazon.com/autoscaling/ec2/userguide/schedule_time.html

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