DVA-C01 Free Practice Test

You run an ad-supported photo sharing website using S3 to serve photos to visitors of your site. At some point you find out that other sites have been linking to the photos on your site, causing loss to your business.
What is an effective method to mitigate this?

1. A. Store photos on an EBS volume ofthe web server
2. B. Remove public read access and use signed URLs with expiry dates.
3. C. Use C|oudFront distributions for static content.
4. D. Block the IPs of the offending websites in Security Group

Correct Answer: B

In regard to DynamoDB, what is the Global secondary index?

1. A. An index with a hash and range key that can be different from those on the table.
2. B. An index that has the same range key as the table, but a different hash key
3. C. An index that has the same hash key and range key as the table
4. D. An index that has the same hash key as the table, but a different range key

Correct Answer: A
Global secondary index - an index with a hash and range key that can be different from those on the table.
Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DataModel.html

A meteorological system monitors 600 temperature gauges, obtaining temperature samples every minute and saving each sample to a DynamoDB table. Each sample involves writing 1K of data and the writes are evenly distributed over time.
How much write throughput is required for the target table?

1. A. 1 write capacity unit
2. B. 10 write capacity units
3. C. 60 write capacity units
4. D. 600 write capacity units
5. E. 3600 write capacity units

Correct Answer: B

A user has launched one EC2 instance in the US West region. The user wants to access the RDS instance launched in the US East region from that EC2 instance. How can the user configure the access for that EC2 instance?

1. A. It is not possible to access RDS of the US East region from the US West region
2. B. Open the security group of the US West region in the RDS security group’s ingress rule
3. C. Configure the IP range of the US West region instance as the ingress security rule of RDS
4. D. Create an IAM role which has access to RDS and launch an instance in the US West region with it

Correct Answer: C
The user cannot authorize an Amazon EC2 security group if it is in a different AWS Region than the RDS DB instance. The user can authorize an IP range or specify an Amazon EC2 security group in the same region that refers to an IP address in another region.
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithSecurityGroups.html

In DynamoDB, what type of HTTP response codes indicate that a problem was found with the client request sent to the service?

1. A. 5xx HTTP response code
2. B. 200 HTTP response code
3. C. 306 HTTP response code
4. D. 4xx HTTP response code

Correct Answer: D