[Solved] You have two Lambda functions, A and B, sharing an account concurrency limit of 10.... If both functions receive 7 simultaneous requests each, how many requests for function B will be throttled? | AWS

AWS - Lambda

You have two Lambda functions, A and B, sharing an account concurrency limit of 10. Function A has reserved concurrency 7. If both functions receive 7 simultaneous requests each, how many requests for function B will be throttled?

A3 requests for function B will be throttled

B0 requests for function B will be throttled

C7 requests for function B will be throttled

D4 requests for function B will be throttled

Step-by-Step Solution

Solution:

Step 1: Understand reserved concurrency reservation
Function A reserves 7 concurrency, so it can run up to 7 instances without throttling.
Step 2: Calculate remaining concurrency for function B
Account limit is 10, so 10 - 7 = 3 concurrency left for function B.
Step 3: Analyze requests for function B
Function B gets 7 requests but only 3 can run concurrently; 7 - 3 = 4 requests are throttled.
Final Answer:
4 requests for function B will be throttled -> Option D
Quick Check:
Reserved concurrency reduces available concurrency [OK]

Quick Trick: Reserved concurrency reduces shared limit for others [OK]

Common Mistakes:

Ignoring reserved concurrency reservation
Assuming full account concurrency is available to all
Miscounting throttled requests

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More AWS Quizzes

If both functions receive 7 simultaneous requests each, how many requests for function B will be throttled?

Step 1: Understand reserved concurrency reservation

Step 2: Calculate remaining concurrency for function B

Step 3: Analyze requests for function B

Final Answer:

Quick Check:

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