Rate limiting and budget controls in Agentic AI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a maximum number of API calls per minute.

Agentic AI

max_calls_per_minute = [1]

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

A100

Bapi_limit

CNone

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Setting the limit to None or negative values which disables or breaks the limit.

The variable max_calls_per_minute should be set to a positive integer to limit API calls.

2fill in blank

medium

Complete the code to check if the current usage exceeds the budget.

Agentic AI

if current_usage [1] budget_limit:
    print('Budget exceeded')

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

A<

B<=

C==

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using <= or < which would not catch exceeding usage.

We want to detect when usage is greater than the budget limit to trigger an alert.

3fill in blank

hard

Fix the error in the code that resets the usage counter after a time window.

Agentic AI

if time.time() - last_reset_time [1] reset_interval:
    usage_count = 0
    last_reset_time = time.time()

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

A==

B<=

C>=

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using < or <= which resets too early or not at the right time.

The usage counter should reset when the elapsed time is greater than or equal to the reset interval.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that tracks usage per user only if usage is below the limit.

Agentic AI

usage_per_user = {user: usage[1] for user, usage in user_usage.items() if usage [2] limit}

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

A+

B<

C<=

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using subtraction instead of addition or wrong comparison operators.

The comprehension adds usage values and filters users with usage less than the limit.

5fill in blank

hard

Fill all three blanks to create a rate limiter function that returns True if under limit and updates usage.

Agentic AI

def rate_limiter(user):
    if usage.get(user, 0) [1] limit:
        usage[user] = usage.get(user, 0) [2] 1
        return [3]
    return False

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

A<

B+

CTrue

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using == instead of < for comparison, or returning False incorrectly.

The function checks if usage is less than limit, increments usage by 1, and returns True to allow the action.

Practice

1. What is the main purpose of rate limiting in an AI system?

easy

A. To control how often users can make requests

B. To increase the speed of AI responses

C. To improve the accuracy of AI predictions

D. To store more user data for training

Solution

1. Step 1: Understand rate limiting concept

   Rate limiting is about controlling the number of requests a user can make in a time period.

2. Step 2: Identify the main purpose

   This control helps prevent overload and keeps the system fair for all users.

3. Final Answer:

   To control how often users can make requests -> Option A

4. Quick Check:

   Rate limiting = control request frequency [OK]

Hint: Rate limiting means limiting request frequency [OK]

Common Mistakes:

• Confusing rate limiting with improving AI accuracy
• Thinking rate limiting increases speed
• Mixing rate limiting with data storage

2. Which of the following is the correct way to set a budget control in an AI usage system?

easy

A. budget = max(1000)

B. limit_budget = 'max 1000 dollars'

C. setBudget(1000 dollars)

D. budget_limit = 1000 # sets max money allowed

Solution

1. Step 1: Identify correct syntax for budget control

   Setting a budget limit usually involves assigning a numeric value to a variable representing money allowed.

2. Step 2: Check each option

   budget_limit = 1000 # sets max money allowed uses a clear assignment with a comment, which is correct syntax. Others use invalid syntax or unclear expressions.

3. Final Answer:

   budget_limit = 1000 # sets max money allowed -> Option D

4. Quick Check:

   Assign numeric budget limit = correct [OK]

Hint: Budget control is a numeric variable assignment [OK]

Common Mistakes:

• Using strings instead of numbers for budget
• Calling undefined functions like setBudget
• Using incorrect syntax like max(1000)

3. Given this code snippet controlling requests per minute:

requests = [1,1,1,1,1,1]
limit = 5
allowed = sum(requests[:limit])
print(allowed)

What will be the printed output?

medium

A. 1

B. 6

C. 5

D. Error

Solution

1. Step 1: Understand the code slicing and summing

   The code sums the first 5 elements of the list requests, each element is 1.

2. Step 2: Calculate the sum of first 5 elements

   Sum = 1+1+1+1+1 = 5

3. Final Answer:

   5 -> Option C

4. Quick Check:

   Sum first 5 ones = 5 [OK]

Hint: Sum first 5 elements of ones list = 5 [OK]

Common Mistakes:

• Summing all 6 elements instead of 5
• Confusing slicing syntax
• Expecting an error due to slicing

4. Find the error in this rate limiting code snippet:

max_requests = 10
requests_made = 0
if requests_made > max_requests:
    print("Limit reached")
else:
    requests_made += 1
    print("Request allowed")

medium

A. No error, code is correct

B. The condition should be >= instead of >

C. The print statements are reversed

D. requests_made should start at 1

Solution

1. Step 1: Analyze the condition for rate limiting

   The code blocks requests if requests_made is greater than max_requests, but it should block when equal too.

2. Step 2: Correct the condition

   Change > to >= to include the max_requests limit properly.

3. Final Answer:

   The condition should be >= instead of > -> Option B

4. Quick Check:

   Use >= to block at limit [OK]

Hint: Use >= to block requests at limit [OK]

Common Mistakes:

• Using > misses blocking at exact limit
• Starting requests_made at 1 is unnecessary
• Swapping print messages confuses logic

5. You want to limit AI usage to 1000 requests per day and a budget of $500. Which approach correctly combines rate limiting and budget control?

hard

A. Set daily_limit = 1000 and budget_limit = 500; check both before allowing requests

B. Set daily_limit = 1000; budget_limit is not needed if rate limiting is set

C. Only set budget_limit = 500; rate limiting is handled automatically

D. Set budget_limit = 1000 and daily_limit = 500; swap values for safety

Solution

1. Step 1: Understand the need for both controls

   Rate limiting controls request count; budget controls money spent. Both must be checked.

2. Step 2: Evaluate options for combining controls

   Set daily_limit = 1000 and budget_limit = 500; check both before allowing requests correctly sets both limits and checks them before allowing requests. Others ignore one control or swap values incorrectly.

3. Final Answer:

   Set daily_limit = 1000 and budget_limit = 500; check both before allowing requests -> Option A

4. Quick Check:

   Use both limits together for control [OK]

Hint: Always check both request count and budget before allowing [OK]

Common Mistakes:

• Ignoring budget when rate limiting is set
• Assuming budget controls requests automatically
• Swapping limit values causing confusion