Deck 2

Question 1

Difference between physical RDS replication and logical

Answer 1

Logical is software based and physical is block based

Question 2

RDS types that use physical replication

Answer 2

MySQL, Oracle, & Postgres

Question 3

RDS instance type that use logical replication

Answer 3

MSSQL (server native mirroring)

Question 4

What mechanism provides the failover for RDS HA?

Answer 4

DNS, your clients always use an endpoint

Question 5

How can you force failover on an RDS instance?

Answer 5

Reboot the instance

Question 6

How can you reboot a RDS instance?

Answer 6

webUI or the RebootDBInstance

Question 7

How many read replicas can you have of Postgres and MySQL?

Answer 7

5

Question 8

What will happen if you create a read replica of a DB that does not have multi-AZ enabled?

Answer 8

Brief IO pause during the snapshot

Question 9

What RDS database can have read replica of read replicas?

Answer 9

MySQL

Question 10

Can you take snapshots or backup from RDS read replicas?

Answer 10

No

Question 11

What Cloudwatch metric indicates the amount of time in seconds that the read replica is behind the source database

Answer 11

ReplicaLag. Bad lag can also indicate performance issues.

Question 12

What might you have to do if you are unable to create read replicas RDS?

Answer 12

Edit and enable backups

Question 13

What are the two ways you can monitor RDS

Answer 13

Metrics and Events

Question 14

Which RDS Metric indicates the number of outstanding I/O requests (read and write) waiting to access the disk.

Answer 14

diskQueueDepth

Question 15

Which RDS Metric indicates the number of database connections in use.

Answer 15

DatabaseConnections

Question 16

RDS metrics that tells you how much disk space is available in Bytes

Answer 16

FreeStorageSpace

Question 17

Which RDS metrics that shows the average number of disk I/O operations per second for reads and the other for writes

Answer 17

ReadIOPS

WriteIOPS

Question 18

How ofter is an ELB monitored

Answer 18

Every 60 seconds unless there is no traffic

Question 19

ELB metric the is a count of the total # of requests pending submission

Answer 19

SurgeQueueLength

Question 20

ELB metric that would show the # of requests being rejected due to a full queue

Answer 20

SpilloverCount

Question 21

Reasons for instance start failures on an autoscaling config

Answer 21

Key pairs deleted, config not working correctly, autoscaling group not found, instance type not supported, the AZ is no longer supported, Invalid EBS mapping, autoscaling not enabled on your (older) account, attempting to attach EBS to an instance store.

Question 22

AWS service that allow root access

Answer 22

EC2
Elastic BeanStalk
Elastic Map Reduce
Ops Works

Question 23

When is a health check error triggered

Answer 23

error = interval x threshold

Question 24

How does a an ELB balance sessions by default?

Answer 24

Based on load

Question 25

ELB sticky sessions is also known as what?

Answer 25

Session Affinity

Question 26

Difference between ELB Duration Based sticky states and Application Based

Answer 26

Duration based is a cookie provided by the ELB and the expiration is based on the load balance algorithm. Application based are special cookies used to assign the session back to the original session.

Question 27

How to pre-warm an ELB

Answer 27

You must contact Amazon and provide start and end datas, expected request rate per second, and total size of request/response rate that you are expecting

Question 28

AWS is responsible for the security on which services?

Answer 28

DynamoDB, RDS, Redshift, Elastic Mapreduce, Workspaces

Question 29

Trusted advisor currently only inspects which service

Answer 29

IAM

Question 30

EBS encryption type and where the compute occurs

Answer 30

256 AES and on the attached EC2 instance (that is why only the larger instances are supported for encryption)

Question 31

AWS compliance

Answer 31

SOC 1,2,3
FISMA, DICAP, FEDRAMP
PCI DSS 
ISO 9001, 27001
ITAR
FIPS