Deployment & Provisioning

Question 1

Why can spot instances be removed?

Answer 1

AWS needed to reclaim capacity

Instance price exceeded your defined max price

Question 2

What characteristic can spot instances have?

Answer 2

Max price
Persistent
Valid to and from

Question 3

What are the spot instances interruption behaviour

Answer 3

Stop - will loose ram

Hibernate - won’t loose ram

Question 4

What is a placement group

Answer 4

Groups systems together in the 10GB network availability zone when greater reruns act or network throughout is required

Question 5

Why would you assign a role to an instance?

Answer 5

To provide the instance access to other AWS services

Question 6

What should you select when creating an EC2 instance to ensure cloudwatch can collect data in 1 min intervals?

Answer 6

Detailed monitoring

Question 7

How do you configure an dedicated instance?

Answer 7

Select when creating

Question 8

Where do you configure a bootstrap for an EC2 instance?

Answer 8

User data under advanced

Question 9

What drive types cannot be used as a root volume?

Answer 9

HDD

Cold and throughout optimized

Question 10

What is the default behaviour of EC2 instances when terminated for defined volumes?

Answer 10

Retain

Deletion behaviour needs to be selected

Question 11

Why may an EC2 instance fail to launch?

Answer 11

Default max limit of 20 on new AWS accounts per region

Insufficentinstancecapacity
AWS does not have enough hardware capacity to service the request.

Question 12

You attempt to launch an instance and get the error instancelimitexceeded

What does this indicate

Answer 12

You have more than 20 instances running in the region

Question 13

You’ve reached the minimum number of running instances in a region. How do you resolve?

Answer 13

Request an increase with amazon support

Question 14

You receive the error Insufficentinstancecapacity. What can you do?

Answer 14

Wait
Try another AZ
Request fewer instances 
Select a different instance type 
Try purchasing a reserved instance

Question 15

What are the two EBS SSD types?

Answer 15

General purpose

Provisioned IOPS

Question 16

You noteice your application performance has degraded. Your coworker tells you there are a lot of IO requests queuing. What can you do?

Answer 16

Change to a PIOPS disk

If it’s GP2, you can increase the size and get additional IOPS

Question 17

Your application requires greater than 16000 IOPS. What kind of EBS volume should you use?

Answer 17

PIOPS

Question 18

Your EC2 instance is using an EBS GP2 volume that is 5.2 TB in size. The system has many queuing delays. What can you do?

Answer 18

Change to IOPS as the GP2 volume has reached its max IOPS capabilities

Question 19

What are the 3 types of ELBs?

Answer 19

Application
Network
Classic

Question 20

What ELB should you use if you need high performance or a static IP address?

Answer 20

Network

Question 21

You are expecting a sudden and significant increase in traffic. How can you prepare you ELB?

Answer 21

Pre-warm

Question 22

What is the default code for ELB success?

Answer 22

200

Question 23

You receive a 4xx error code. Where might the problem be

Answer 23

The client

Question 24

You receive a 4xx error code. Where might the problem be

Answer 24

Server side

Question 25

What are the common ELB 4xx error codes?

Answer 25

400 - header is malformed 401 - unauthorized 403 - forbidden WAF access control list 460 - client closed connection before ELB could respond 463- load balancer received xforwarded-for request with

Question 26

What are the common ELB 5xx error codes?

Answer 26

``` 500 - internal server error 502 - bad gateway 503 - service unavailable 504 - GW timeout 561 - unauthorized ```

Question 27

What is the default ELB cloudwatch data collection interval?

Answer 27

60 seconds

Question 28

What are four overall ELB cloudwatch metrics

Answer 28

Backendconnectionerrors HealthyHostCount unhealthyhostcount Httpcode_backend

Question 29

ELB cloudwatch performance metrics

Answer 29

Latency Requestcount Surgequeuelength spillovercount

Question 30

What is the max ELB queue size?

Answer 30

1024

Question 31

What happens to requests over 1024 in the ELB queue

Answer 31

They are rejected

Question 32

What happens to ELB requests in the spillovercount

Answer 32

They are rejected

Question 33

What would Instancelimitexceeded error mean?

Answer 33

You have reached the default instance limit. Per region 20

Question 34

What EBS disk type is ideal for low cost infrequently accessed data?

Answer 34

Cold

Question 35

What disk type is ideal for system boot, virtual desktops and low latency apps?

Answer 35

GP

Question 36

What disk type is ideal for high performance, mission critical, low latency high throughout

Answer 36

PIOPS

Question 37

What disk type is ideal for frequently accessed throughout intensive workloads?

Answer 37

Throughput optimized

Question 38

How will cloudformation behave if part of the deployment fails?

Answer 38

Default will rollback

Question 39

How would you replace the certificate for an existing LB with an HTTPS listener, from the CLI?

Answer 39

Use aws iam get-server-certificate elb set-load-balancer-listener-ssl-certificate

Question 40

What are not two reasons why an instance goes from pending to terminated?

Answer 40

AWS does not have the capacity | You have reached the max instance limit.