AWS-Certified-Solutions-Architect-Professional Amazon Exam Questions and Free Practice Test

Question 25

What is the average queue length recommended by AWS to achieve a lower latency for the 200 PIOPS EBS volume?

A. 5

B. 1

C. 2

D. 4

Correct Answer:B
The queue length is the number of pending I/O requests for a device. The optimal average queue length will vary for every customer workload, and this value depends on a particular appIication's sensitMty to IOPS and latency. If the workload is not delivering enough I/O requests to maintain the optimal average queue length, then the EBS volume might not consistently deliver the IOPS that have been provisioned. However, if the workload maintains an average queue length that is higher than the optimal value, then the per-request I/O latency will increase; in this case, the user should provision more IOPS for his volume. AWS recommends that the user should target an optimal average queue length of 1 for every 200 provisioned IOPS and tune that value based on his application requirements.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-workload-demand.htmI

Question 27

What types of identities do Amazon Cognito identity pools support?

A. They support both authenticated and unauthenticated identities.

B. They support only unauthenticated identities.

C. They support neither authenticated nor unauthenticated identities.

D. They support only authenticated identitie

Correct Answer:A
Amazon Cognito identity pools support both authenticated and unauthenticated identities. Authenticated identities belong to users who are authenticated by a public login provider or your own backend authentication process. Unauthenticated identities typically belong to guest users. Reference: http://docs.aws.amazon.com/cognito/devguide/identity/identity-poo|s/

Question 28

You are migrating a legacy client-server application to AWS. The application responds to a specific DNS domain (e.g. www.examp|e.com) and has a 2-tier architecture, with multiple application sewers and a database sewer. Remote clients use TCP to connect to the application servers. The application servers need to know the IP address of the clients in order to function properly and are currently taking that information from the TCP socket. A MuIti-AZ RDS MySQL instance will be used for the database. During the migration you can change the application code, but you have to file a change request.
How would you implement the architecture on AWS in order to maximize scalability and high availability?

A. File a change request to implement Alias Resource support in the applicatio

B. Use Route 53 Alias Resource Record to distribute load on two application servers in different Azs.

C. File a change request to implement Latency Based Routing support in the applicatio

D. Use Route 53 with Latency Based Routing enabled to distribute load on two application servers in different Azs.

E. File a change request to implement Cross-Zone support in the applicatio

F. Use an ELB with a TCP Listener and Cross-Zone Load Balancing enabled, two application servers in different AZs.

G. File a change request to implement Proxy Protocol support in the applicatio

H. Use an ELB with a TCP Listener and Proxy Protocol enabled to distribute load on two application servers in different Azs.

Correct Answer:D

Question 29

You have deployed a web application targeting a global audience across multiple AWS Regions under the domain name.exampIe.com. You decide to use Route53 Latency-Based Routing to serve web requests to users from the region closest to the user. To provide business continuity in the event of server downtime you configure weighted record sets associated with two web servers in separate Availability Zones per region. Dunning a DR test you notice that when you disable all web sewers in one of the regions Route53 does not automatically direct all users to the other region. What could be happening? (Choose 2 answers)

A. Latency resource record sets cannot be used in combination with weighted resource record sets.

B. You did not setup an HTTP health check to one or more of the weighted resource record sets associated with me disabled web sewers.

C. The value of the weight associated with the latency alias resource record set in the region with the disabled sewers is higher than the weight for the other region.

D. One of the two working web sewers in the other region did not pass its HTTP health check.

E. You did not set "Evaluate Target Health" to "Yes" on the latency alias resource record set associated with example com in the region where you disabled the servers.

Correct Answer:BE

Question 30

Your department creates regular analytics reports from your company's log files All log data is collected in Amazon S3 and processed by daily Amazon Elastic MapReduce (EMR) jobs that generate daily PDF reports and aggregated tables in CSV format for an Amazon Redshift data warehouse.
Your CFO requests that you optimize the cost structure for this system.
Which of the following alternatives will lower costs without compromising average performance of the system or data integrity for the raw data?

A. Use reduced redundancy storage (RRS) for all data In S3. Use a combination of Spot Instances and Reserved Instances for Amazon EMR job

B. Use Reserved Instances for Amazon Redshift.

C. Use reduced redundancy storage (RRS) for PDF and .csv data in S3. Add Spot Instances to EMR job

D. Use Spot Instances for Amazon Redshift.

E. Use reduced redundancy storage (RRS) for PDF and .csv data In Amazon S3. Add Spot Instances to Amazon EMR job

F. Use Reserved Instances for Amazon Redshift.

G. Use reduced redundancy storage (RRS) for all data in Amazon S3. Add Spot Instances to Amazon ENIR job

H. Use Reserved Instances for Amazon Redshift.

Correct Answer:C

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Question 25

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Question 30