Application Services

Question 1

What is SQS?

Answer 1

Can be used as a message queue for applications

Question 2

Is SQS pull or push based?

Answer 2

pull

Question 3

What is the size of SQS messages?

Answer 3

256

Question 4

What is the SQS visibility timeout max?

Answer 4

12 hours

Question 5

How long can SQS messages stay in queue?

Answer 5

1 min to 14 days. Default is 4 days

Question 6

What is the SQS visibility timeout?

Answer 6

Amount of time that a message is invidible in queue after a reader picks up that message

Question 7

What happens if an SQS job processes a message before the invisibility time out expires?

Answer 7

it is deleted

Question 8

What happens if an SQS job processes does not process a before the visibility time out expires?

Answer 8

The message becomes visible again for another reader to process

Question 9

What is the difference between SQS short and long polling?

Answer 9

Short polling will return a response immediately even if the queue is empty. Long polling doesn’t return a response until a message arrives in the queue.

Question 10

What are the SQS queue types?

Answer 10

FIFO or standard

Question 11

What is the max retention for SWF?

Answer 11

1 year

Question 12

Which message service presents a task orientated API?

Answer 12

SWF

Question 13

Which message service offers a message orientated API?

Answer 13

SQS

Question 14

Which message service ensure that a message is only delivered once?

Answer 14

SWF

Question 15

Which message service keeps track of events?

Answer 15

SWF

Question 16

Which service requires application level tracking?

Answer 16

SQS

Question 17

What are the three SWF actors?

Answer 17

Workflow starterDecidersActivity worker

Question 18

What are the SNS subscribers?

Answer 18

HTTP

HTTPS

email

email–json

jsonSQSlambdaapplication

Question 19

What are SNS and SQS?

Answer 19

messaging services

Question 20

You need a push based message service

Answer 20

SNS

Question 21

What is elastic transcoder?

Answer 21

media transcoder in the cloud

Question 22

What are the three kinesis types?

Answer 22

stream firehoseanalytics

Question 23

What is kinesis stream?s

Answer 23

kinesis streams breaks up incoming data into shards and pipes to EC2 consumers

Question 24

What is kinesis firehose?

Answer 24

Firehose accepts streams data to S3 with almbda quering

Question 25

What is kinesis stream?s

Answer 25

kinesis streams break's up incoming data into shards and pipes to EC2 consumers

Question 26

What is kinesis firehose?

Answer 26

Firehose accepts and streams data to S3 with lambda query'

Question 27

What service decouples application components to run independently?

Answer 27

SQS

Question 28

What is the max size of an SQS message?

Answer 28

256KB

Question 29

What are the two types of SQS queues?

Answer 29

Standard FIFO

Question 30

Which SQL queue would you use if you need unlimited messages and best effort ordering?

Answer 30

standard

Question 31

Which SQL queue would you use if you need unlimited messages and correct ordering?

Answer 31

FIFO

Question 32

Is SQS pull or push based?

Answer 32

Pull

Question 33

What AWS application service would you use to coordinate work across applications?

Answer 33

SWF

Question 34

What SWF component interacts with SWF to get tasks?

Answer 34

Workers

Question 35

What SWF component controls coordination of tasks

Answer 35

Deciders

Question 36

What SWF component would you use to isolate SWF worflows

Answer 36

Domains

Question 37

What is the max SWF length?

Answer 37

I year

Question 38

What AWS application service would you use to send notifications from the cloud to SMS or email?

Answer 38

SNS

Question 39

What AWS application service would you use to transcode media?

Answer 39

Elastic transcoder

Question 40

What AWS application service would you use to manage APIs?

Answer 40

API gw

Question 41

Can API gateway provide caching to improve performance?

Answer 41

Yes

Question 42

What AWS application service would you use to send streaming data to for analysis?

Answer 42

kinesis

Question 43

What are the three types of kinesis services?

Answer 43

AnalysticsStreaming Firehose

Question 44

Which kinesis service would you use to accept data from multiple sources to store for 24 hours to 7 days that are then forwarded to consumers?

Answer 44

Streams

Question 45

Which kinesis service would you use to accept data from multiple sources to analyze in real time to then store in S3?

Answer 45

Firehose

Question 46

Which kinesis service would you use to perform SQL queries on kinesis streams or firehose?

Answer 46

analytics

Question 47

What is cognito

Answer 47

Provides login federation using FB, google , amazon

Question 48

How does cognito work?

Answer 48

Authenticates with web ID provider, recieve temporary token, exchange with AWS credentials to provide access by allowing them to assume role

Question 49

What is a cognito user pool?

Answer 49

User based, handles authentication, registration and account recovery.

Question 50

What service does cognito identity pools provide?

Answer 50

Authorizes access to AWS resources

Question 51

What are the SQS message sizes?

Answer 51

256 KB

Question 52

How long can SQS messages stay in a queue?

Answer 52

1 min to 14 days, default is 4 days

Question 53

What is the difference between SNS and SQS?

Answer 53

SNS is a push notification service, whereas SQS is message system that requires worker nodes to poll a queue.

Question 54

What happens when you create a topic on Amazon SNS?

Answer 54

An Amazon Resource Name is created.