API Gateway

Question 1

With what backends can API Gateway communicate?

Answer 1

"Lambda Functions
HTTP
Mock
AWS Services
VPC Link"

Question 2

What is the Enable Throttling feature?

Answer 2

limits the requests sent to your API to a set level

Question 3

Steady-state vs burst request

Answer 3

“Steady-state - requests per second

burst - requests per milisecond”

Question 4

What is the API Caching feature?

Answer 4

Gateway caches your responses for a specified TTL period to reduce future latency to your API

Question 5

What is a stage?

Answer 5

“A feature for grouping functions and providing general setting (like throttling) for those functions
individaul methods can override with their own settings”

Question 6

What are the access control mechanisms?

Answer 6

“Resource polocies
IAM roles/polocies
CORS
Lambda authorizers(lambda functions for authorizing requests)
Cognito user pools
Client side SSL certificate(gateway to resource)
Usage plans”

Question 7

What is a Usage plan?

Answer 7

“create custom plans for users and provide them API keys

the plan limits usage of API stages/methods and tracks usage”

Question 8

What is the default security measure provided from API Gateway?

Answer 8

“Protection from DDoS attacks

But it is not configured for every use case”

Question 9

What are the cache settings?

Answer 9

“Flush entire cache
cache capacity
Encrypt cache data
cashe Time-to-live(TTL)”

Question 10

Access logging vs CloudTrail

Answer 10

“Access logging - info regarding API calls to the Gateway

CloudTrail - info regarding api calls within the Group”