Cost monitoring and budgets in Firebase - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a budget amount in Firebase Billing.

Firebase

const budgetAmount = [1]; // amount in USD

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

A1000

B0

C500

D-100

Attempts:

3 left

💡 Hint

Common Mistakes

Using zero or negative numbers as budget amount

Using strings instead of numbers

The budget amount should be a positive number. 500 is a valid budget amount.

2fill in blank

medium

Complete the code to create a budget filter for a specific project ID.

Firebase

const budgetFilter = { projectId: '[1]' };

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

Amy-project-123

Bproject-xyz

Cproject_001

D123-my-project

Attempts:

3 left

💡 Hint

Common Mistakes

Using invalid characters in project ID

Mixing up project ID with project name

The project ID must match the Firebase project identifier format. 'my-project-123' is a valid example.

3fill in blank

hard

Fix the error in the budget alert threshold percentage.

Firebase

const alertThreshold = [1]; // percentage value

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

A50

B1.5

C150

D-10

Attempts:

3 left

💡 Hint

Common Mistakes

Using values greater than 100

Using negative values

The alert threshold should be a percentage between 0 and 100. 50 is valid.

4fill in blank

hard

Fill both blanks to create a budget alert condition for when cost exceeds a threshold.

Firebase

const alertCondition = { costAmount: [1], comparison: '[2]' };

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

A100

B200

CGREATER_THAN

DLESS_THAN

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'LESS_THAN' instead of 'GREATER_THAN'

Using a cost amount too low or negative

The alert triggers when costAmount is greater than the threshold. 200 and 'GREATER_THAN' are correct.

5fill in blank

hard

Fill all three blanks to define a budget with a name, amount, and alert threshold.

Firebase

const budget = { name: '[1]', amount: [2], alertThreshold: [3] };

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

AMonthlyBudget

B300

C75

DYearlyBudget

Attempts:

3 left

💡 Hint

Common Mistakes

Using numbers as name

Setting alertThreshold over 100

The budget is named 'MonthlyBudget' with amount 300 and alert threshold 75%.

Practice

1. What is the main purpose of setting a budget in Firebase billing?

easy

A. To disable Firebase services when spending is high

B. To increase your Firebase project storage automatically

C. To get alerts when spending approaches a set limit

D. To create backups of your billing data

Solution

1. Step 1: Understand budget purpose in Firebase billing

   Budgets are used to monitor spending and avoid surprises by setting limits.

2. Step 2: Identify what budgets do

   Budgets send alerts when spending nears or exceeds the set amount, helping control costs.

3. Final Answer:

   To get alerts when spending approaches a set limit -> Option C

4. Quick Check:

   Budget alerts = spending control [OK]

Hint: Budgets alert you before overspending happens [OK]

Common Mistakes:

• Thinking budgets automatically stop services
• Confusing budgets with storage limits
• Assuming budgets create backups

2. Which command correctly creates a billing budget with Google Cloud CLI for Firebase?

easy

A. gcloud billing budgets create --billing-account=12345 --amount=100

B. gcloud beta billing budgets create --billing-account=12345 --amount=100

C. gcloud beta billing budgets set --billing-account=12345 --amount=100

D. gcloud beta billing budgets create --account=12345 --limit=100

Solution

1. Step 1: Identify correct command syntax for creating budgets

   The correct command uses 'gcloud beta billing budgets create' with '--billing-account' and '--amount' flags.

2. Step 2: Compare options for correct flags and command

   gcloud beta billing budgets create --billing-account=12345 --amount=100 matches the correct syntax exactly; others have wrong flags or commands.

3. Final Answer:

   gcloud beta billing budgets create --billing-account=12345 --amount=100 -> Option B

4. Quick Check:

   Correct CLI syntax = gcloud beta billing budgets create --billing-account=12345 --amount=100 [OK]

Hint: Use 'gcloud beta billing budgets create' with correct flags [OK]

Common Mistakes:

• Omitting 'beta' in the command
• Using wrong flags like '--account' or '--limit'
• Using 'set' instead of 'create'

3. What will be the output when running this command?

gcloud beta billing budgets list --billing-account=12345

medium

A. Lists all budgets set for billing account 12345

B. Creates a new budget for billing account 12345

C. Deletes all budgets for billing account 12345

D. Shows an error because 'list' is not a valid subcommand

Solution

1. Step 1: Understand the command purpose

   The command uses 'list' to show existing budgets for the specified billing account.

2. Step 2: Identify expected output

   The output will be a list of all budgets configured under billing account 12345.

3. Final Answer:

   Lists all budgets set for billing account 12345 -> Option A

4. Quick Check:

   'list' shows budgets = Lists all budgets set for billing account 12345 [OK]

Hint: 'list' shows budgets, 'create' makes new ones [OK]

Common Mistakes:

• Confusing 'list' with 'create' or 'delete'
• Assuming 'list' is invalid
• Expecting command to modify budgets

4. You run gcloud beta billing budgets create --billing-account=12345 --amount=200 but get an error. What is the most likely cause?

medium

A. The command should use 'gcloud billing budgets create' without 'beta'

B. You forgot to enable the Billing API for your project

C. The amount value must be a string, not a number

D. The billing account ID is invalid or missing permissions

Solution

1. Step 1: Check common causes of errors in billing commands

   Errors often happen if the billing account ID is wrong or lacks permission.

2. Step 2: Evaluate other options

   The Billing API is usually enabled; amount accepts numbers; 'beta' is required for budgets.

3. Final Answer:

   The billing account ID is invalid or missing permissions -> Option D

4. Quick Check:

   Invalid billing account = error [OK]

Hint: Check billing account ID and permissions first [OK]

Common Mistakes:

• Assuming API is disabled by default
• Thinking amount must be a string
• Removing 'beta' from the command

5. You want to create a budget that alerts you at 50%, 75%, and 90% of your $500 monthly Firebase spending limit. Which approach is correct?

hard

A. Use gcloud beta billing budgets create with multiple threshold rules for 50%, 75%, and 90%

B. Create three separate budgets each with one threshold at 50%, 75%, and 90%

C. Set a single threshold at 90% and manually check spending for lower percentages

D. Budgets only support one threshold, so set it at 100% and monitor manually

Solution

1. Step 1: Understand threshold rules in budgets

   Budgets support multiple threshold rules to alert at different spending percentages.

2. Step 2: Identify best practice for multiple alerts

   Using one budget with multiple thresholds is efficient and recommended over multiple budgets.

3. Final Answer:

   Use gcloud beta billing budgets create with multiple threshold rules for 50%, 75%, and 90% -> Option A

4. Quick Check:

   Multiple thresholds in one budget = Use gcloud beta billing budgets create with multiple threshold rules for 50%, 75%, and 90% [OK]

Hint: One budget can have many alert thresholds [OK]

Common Mistakes:

• Creating multiple budgets instead of one
• Setting only one threshold and ignoring others
• Believing budgets support only one threshold