Why auto scaling matters in AWS - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the minimum number of instances in an Auto Scaling group.

AWS

MinSize = [1]

Drag options to blanks, or click blank then click option'

A0

Bmax

C5

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Setting MinSize to a negative number causes errors.

Using 'max' as a value is invalid.

The minimum size must be zero or more. Setting it to 0 allows no instances when demand is low.

2fill in blank

medium

Complete the code to set the desired capacity of an Auto Scaling group.

AWS

DesiredCapacity = [1]

Drag options to blanks, or click blank then click option'

A0

BMinSize

C3

DMaxSize

Attempts:

3 left

💡 Hint

Common Mistakes

Setting DesiredCapacity to MinSize or MaxSize variables directly without values.

Using zero when you want some instances running.

DesiredCapacity is the number of instances the group tries to maintain, often set to a positive integer like 3.

3fill in blank

hard

Fix the error in the Auto Scaling policy action type.

AWS

ScalingPolicy = {
  "AdjustmentType": "[1]",
  "ScalingAdjustment": 1
}

Drag options to blanks, or click blank then click option'

AChangeInCapacity

BExactCapacity

CPercentChangeInCapacity

DIncreaseCapacity

Attempts:

3 left

💡 Hint

Common Mistakes

Using invalid strings like 'IncreaseCapacity' causes errors.

Confusing 'ExactCapacity' with 'ChangeInCapacity'.

"ChangeInCapacity" is a valid AdjustmentType that increases or decreases the number of instances by a fixed amount.

4fill in blank

hard

Fill both blanks to create a scaling policy that increases capacity by 2 when CPU usage is high.

AWS

ScalingPolicy = {
  "AdjustmentType": "[1]",
  "ScalingAdjustment": [2]
}

Drag options to blanks, or click blank then click option'

AChangeInCapacity

BExactCapacity

C2

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using ExactCapacity with a number that is not the exact desired count.

Setting ScalingAdjustment to a string instead of a number.

Use "ChangeInCapacity" to adjust by a number, and 2 to increase capacity by two instances.

5fill in blank

hard

Fill all three blanks to define an Auto Scaling group with min size 1, max size 4, and desired capacity 2.

AWS

AutoScalingGroup = {
  "MinSize": [1],
  "MaxSize": [2],
  "DesiredCapacity": [3]
}

Drag options to blanks, or click blank then click option'

A1

B2

C4

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Setting DesiredCapacity higher than MaxSize causes errors.

Using MinSize greater than MaxSize is invalid.

MinSize is 1, MaxSize is 4, and DesiredCapacity is 2 to keep the group balanced.