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 Q511. Can we do Lifecycle management in S3 without versioning enabled ?Amazon Web Services (AWS)
Ans. Yes

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 Q512. How can we archieve S3 objects after certain interval ?Amazon Web Services (AWS)
Ans. We can use S3 lifecycle management to transition older objects into AWS Glacier.

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 Q513. Can we do replication to multiple regions and buckets simultaneously ?Amazon Web Services (AWS)
Ans. No, its not allowed currently.

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 Q514. Can we do replication within the same region i.e into a new bucket within same region ?Amazon Web Services (AWS)
Ans. No. Replication is only allowed across regions. We can manually copy into other bucket though.

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 Q515. Does deletion of an object gets replicated too if we have cross region replication enabled on a bucket ?Amazon Web Services (AWS)
Ans. No, delete markers are not replicated.

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 Q516. Can we do Cross Region replication in S3 without versioning ?Amazon Web Services (AWS)
Ans. No , Both the source and destination should have versioning enabled.

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 Q517. How can we protect from accidental deletes in S3 ?Amazon Web Services (AWS)
Ans. Versioning ( will create Delete marker )
MFA Delete ( authentication upon deletion )
Cross Region Replication ( Replicates aren't deleted )

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 Q518. What is a delete marker wrt to S3 objects ?Amazon Web Services (AWS)
Ans. If the objects / bucket is versioned in S3, Any delete operation on S3 object doesn't physically deletes the object but rather creates a delete marker version. We need to delete the delete marker to physically delete it.

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 Q519. If we have enabled versioning for S3 bucket, Do we need to make all new versions public whenever new versions are uploaded ?Amazon Web Services (AWS)
Ans. Yes, all new versions are private by default even if the original file has been made public.

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 Q520. What is the difference between client side and server side encryption wrt to S3 objects ?Amazon Web Services (AWS)
Ans. Client side encryption is done by the users on their machines whereas server side encryption is done by AWS when objects are uploaded in S3.

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 Q521. Can we make objects public in a bucket which is not public ?Amazon Web Services (AWS)
Ans. No

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 Q522. What is the default visibility of buckets and objects when they are uploaded in S3 ?Amazon Web Services (AWS)
Ans. private

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 Q523. What kind of Access Policy should be kept on S3 Buckets and Policy ?Amazon Web Services (AWS)
Ans. We should only allow access that's needed. So the security Policy should be as restrictive as possible.

Buckets and Files should never be made public unless until they are needed it to be like that.

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 Q524. What status code is returned upon successful upload in S3 ?Amazon Web Services (AWS)
Ans. 200

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 Q525. What are the different ways to secure objects in S3 ?Amazon Web Services (AWS)
Ans. Encryption - In Transit , Client Side , Server Side
Restrictive Access - ACL , Bucket Policy

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 Q526. Can we host a website in S3 ?Amazon Web Services (AWS)
Ans. Yes a static website can be hosted in S3.

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 Q527. What are the factors on which customers are charged for using S3 ?Amazon Web Services (AWS)
Ans. Storage Tier ( IA , Standard , Glacier etc )
Storage ( Volume of Data )
No of Requests
Meta Data
Data Transfer Speed acceleration through cache and Edge Location

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 Q528. What are the different S3 storage Tiers ?Amazon Web Services (AWS)
Ans. S3 Standard
S3 IA - Infrequently Accessed
S3 One Zone IA - One Zone only , Infrequently Accessed
S3 Glacier - achieved

S3 Standard is most expensive , Glacier is least expensive

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 Q529. Within AWS S3, Why new files are available immediately for read operation but not the updates ? Amazon Web Services (AWS)
Ans. Because new files will be fed from where ever they are first available but AWS have no way to identify which is the most updated version among the various regions. The updated version can only be assured once the replication to all availability zones is complete.

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 Q530. Difference between Object based and Block based storage ?Infrastructure
 This question is still unanswered. Can you please provide an answer.


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 Q531. What is the maximum size of a file in S3 ?Amazon Web Services (AWS)
Ans. 5 TB

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 Q532. Difference between S3 bucket and Folder ?Amazon Web Services (AWS)
Ans. Bucket is the highest level folder whose name should be unique globally.

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 Q533. Do we need to specify IAM policies in all different regions ?Amazon Web Services (AWS)
Ans. No, They are all global.

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 Q534. Which is more granular level policy types - Job function or AWS Managed ?Amazon Web Services (AWS)
Ans. AWS Managed. Job Function is the group of many AWS Managed Policies.

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 Q535. What does the Policy classification "Job Function" mean ?Amazon Web Services (AWS)
Ans. Job function provides a mechanism to bundle together all Policies that might be required to perform a particular job like Database Administrator , Billing Administrator etc and hence facilitates granting higher level permissions.

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 Q536. What does effect , action and resource means with respect to AWS IAM policy ?Amazon Web Services (AWS)
Ans. effect means whether the effect of this Policy is to allow or deny, action means the type of action ( read , write ) and service, and resource is the resource where this should apply.

For example - If we want to have a Policy of providing read access on S3 ,
effect will be "allow"
action will be "s3:GetObject"
resource will be "arn:aws:s3:::examplebucket/*"

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 Q537. Which AWS service can be used for creating Billing Alarms ?Amazon Web Services (AWS)
Ans. AWS CloudWatch

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 Q538. What does the following Policy mean

{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:PutObject",
"s3:GetObject",
"s3:DeleteObject"
],
"Resource": [
"arn:aws:s3:::dev-bucket/*",
"arn:aws:s3:::qa-bucket/*"
]
}
]
}
Amazon Web Services (AWS)
 This question is still unanswered. Can you please provide an answer.


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 Q539. Does IAM allow multifactor authentication ?Amazon Web Services (AWS)
Ans. Yes

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 Q540. Does IAM allow Biometric authentication ?Amazon Web Services (AWS)
Ans. No

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