Lambda

Question 1

What unit is Lambda charged in

Answer 1

Per 100m/s

Question 2

Explain Lambda functions

Answer 2

The code you want to run

Question 3

Explain lambda event sources

Answer 3

Services and events that trigger your lambda function

Question 4

In context of Lambda. What is a downstream resource?

Answer 4

Resources required in execution of your functions.

Question 5

Explain Log Streaming

Answer 5

Output from your lambda functions.

Question 6

Lambda function deployment packages, can be two file types. They are…

Answer 6

.zip or .jar

Question 7

What kind of EC2 instances does Lambda use for running code?

Answer 7

General Purpose Family.

Question 8

What’s the default runtime of a lambda function

Answer 8

3 seconds

Question 9

To reduce the cost of lambda functions. Lower these two things…

Answer 9

Memory and Timeout

Question 10

If you choose to run a Lambda function in your VPC. Can the function can connect to the internet?

Answer 10

Only if the subnet of is in has a network gateway.

Question 11

Lambda functions not ran in a VPC. Can access the internet by default?

Answer 11

Yes

Question 12

Should you assign lambda functions to a public subnet?

Answer 12

NO!

Question 13

If you are running your Lambda function on your own VPC. Who’s responsibility is High availability?

Answer 13

Yours

Question 14

True or false. When lambda fails. It writes to a DLQ?

Answer 14

True

Question 15

A synchronous lambda event fails. Will it automatically retry?

Answer 15

No

Question 16

An asynchronous lambda event fails. How many more times will it attempt to run by default?

Answer 16

2

Question 17

In the context of Lambda. Explain Concurrency.

Answer 17

How many occurrences of a lambda function you can have running at once in a single region.

Question 18

What’s default concurrency value for a Lambda event in a single region?

Answer 18

1000

Question 19

How do you raise concurrency in Lambda?

Answer 19

Contact AWS

Question 20

True or false. Concurrency can be based on a function by function basis?

Answer 20

True

Question 21

When you throttle a lambda function. What happens?

Answer 21

It won’t run!

Question 22

Lambda exports can output two file formats. They are…

Answer 22

YAML and Zip

Question 23

Are lambda tests user specific?

Answer 23

Yes

Question 24

What is event source mapping in Lambda?

Answer 24

The configuration that links event source and lambda function.

Question 25

In Lambda. You need some functions to run sequentially. What kind of function should they be?

Answer 25

Synchronous

Question 26

You have some lambda functions, and it doesn’t matter what order they run in. Consider using …… functions.

Answer 26

Asynchronous

Question 27

Can Lambda access resources on dedicated tenancy?

Answer 27

No

Question 28

A Lambda function in your VPC needs access to the internet. How to do this?

Answer 28

Attatch it to a private subnet with a Nat Gateway.

Question 29

You need to run a Lambda event on a schedule. How do you do this?

Answer 29

Use a time based cloud watch event to trigger the function.