A Cantrill - Practice Exam #1 Flashcards
Which DNS Record type is used to commonly verify domain ownership?
TXT
What type of EC2 volume is best to host a small temporary data base and requires high IOPS?
Instance Store.
What is best for diagnosing performance issues on an EBS GP2 volume that looks to have high IOPS demands?
CloudWatch or CloudWatch Logs?
What is true of DDB “Eventually consistent reads” ?
-Uses less RCU than a strongly consistent read
-You can receive outdated data
What is RCU in DDB?
What is a way to improve a User Data script that has grown too long and slows the deployment and launch of the EC2?
Create and use a custom AMI
What does S3 transfer acceleration do?
Improves speed and performance of S3 objects delivered to users.
If you need to allow access to an S3 bucket in your account to IAM users from another account what should you do?
*Objects which are uploaded MUST be owned by your account, NOT the external account
Use an IAM role in your account
Which DNS record type is generally used to point R53 record sets at AWS logical resources?
A + Alias records
difference between Session Manager and EC2 Connect ?
If you perform an EC2 reboot, will the instance store data be lost?
No data persists on an OS reboot. (check/test in AWS IRL)
CloudHSM + (SSE3 or Client side encryption) for FIPS 140-2 Level 3 framework
Image in CF is not the new image that was just uploaded to S3 (origin). How do you get the CF image to match the new S3 Image?
Invalidate the object on the CF Distribution.
AWS provide a registry of open data sets which can be used by customers within their applications. How much does it cost to use these datasets within AWS products?
Its FREE!!!
What needs to be enabled in order for S3 CRR to work effectively?
Versioning MUST be enabled on both buckets, in order for CRR to work.
What happens when you delete the first full EBS snapshot in a sequence of snapshots? Can you still do a full restore of the Volume?
Deleting the snapshot doesnt actually delete the data. The next snapshot becomes the new “Full” snapshot. YES you can do a full restore
Is CPU utilization a default or custom Cloudwatch metric?
CPU util is DEFAULT in CW.
What feature within AWS allows you to control access to an S3 bucket so that everything BUT CloudFront Access is denied ?
OAI
A website running on EC2s and using cloudfront is expecting a large surge of usage, and is concerned that existing infra wont be able to handle it. What would be a good architecture here?
Develop the system using Lambda. (See ChatGPT)
If an EIP is not associated with anything, does it cost $?
EIPs have a cost even if not associated with anything.
EIPs are per account AND which of the following?
Per AZ
OR
Per Region?
EIPs are per account and per REGION.
Default SQS queues do not require messages to be delivered in the same order that they were received, T or F?
True. SQS queues by default do not deliver messages in the same order that they were received.
For that you would need a FIFO SQS queue.
Is a standard SQS queue designed to handled the same message delivered twice ?
Yes, Standard SQS queue should be able to handle the same message delivered twice.
What is true of instance type and size in regards to cluster placement groups?
When adding instances to a cluster placement group, all instances must be of the same instance type and size.
