AWS-Solution-Architect-Associate Amazon Exam Questions and Free Practice Test

Question 139

Amazon Elastic Load Balancing is used to manage traffic on a fileet of Amazon EC2 instances, distributing traffic to instances across all availability zones within a region. Elastic Load Balancing has all the advantages of an on-premises load balancer, plus several security benefits.
Which of the following is not an advantage of ELB over an on-premise load balancer?

A. ELB uses a four-tier, key-based architecture for encryption.

B. ELB offers clients a single point of contact, and can also serve as the first line of defense against attacks on your network.

C. ELB takes over the encryption and decryption work from the Amazon EC2 instances and manages it centrally on the load balancer.

D. ELB supports end-to-end traffic encryption using TLS (previously SSL) on those networks that use secure HTTP (HTTPS) connections.

Correct Answer:A
Amazon Elastic Load Balancing is used to manage traffic on a fileet of Amazon EC2 instances, distributing traffic to instances across all availability zones within a region. Elastic Load Balancing has all the advantages of an on-premises load balancer, plus several security benefits:
Takes over the encryption and decryption work from the Amazon EC2 instances and manages it centrally on the load balancer
Offers clients a single point of contact, and can also serve as the first line of defense against attacks on your network
When used in an Amazon VPC, supports creation and management of security groups associated with your Elastic Load Balancing to provide additional networking and security options
Supports end-to-end traffic encryption using TLS (previously SSL) on those networks that use secure HTTP (HTTPS) connections. When TLS is used, the TLS server certificate used to terminate client connections can be managed centrally on the load balancer, rather than on every indMdual instance. Reference: http://d0.awsstatic.com/whitepapers/Security/AWS Security Whitepaper.pdf

Question 140

Can I use Provisioned IOPS with VPC?

A. Only Oracle based RDS

B. No

C. Only with MSSQL based RDS

D. Yes for all RDS instances

Correct Answer:D

Question 141

When does the billing of an Amazon EC2 system begin?

A. It starts when the Status column for your distribution changes from Creating to Deployed.

B. It starts as soon as you click the create instance option on the main EC2 console.

C. It starts when your instance reaches 720 instance hours.

D. It starts when Amazon EC2 initiates the boot sequence of an AM instanc

Correct Answer:D
Billing commences when Amazon EC2 initiates the boot sequence of an AM instance. Billing ends when the instance terminates, which could occur through a web services command, by running "shutdown -h", or through instance failure. When you stop an instance, Amazon shuts it down but doesn/Et charge hourly usage for a stopped instance, or data transfer fees, but charges for the storage for any Amazon EBS volumes.
Reference: http://aws.amazon.com/ec2/faqs/

Question 142

A company is running a batch analysis every hour on their main transactional DB. running on an RDS MySQL instance to populate their central Data Warehouse running on Redshift During the execution of the batch their transactional applications are very slow When the batch completes they need to update the top management dashboard with the new data The dashboard is produced by another system running on-premises that is currently started when a manually-sent email notifies that an update is required The on-premises system cannot be modified because is managed by another team.
How would you optimize this scenario to solve performance issues and automate the process as much as possible?

A. Replace RDS with Redshift for the batch analysis and SNS to notify the on-premises system to update the dashboard

B. Replace ROS with Redshift for the oaten analysis and SQS to send a message to the on-premises system to update the dashboard

C. Create an RDS Read Replica for the batch analysis and SNS to notify me on-premises system to update the dashboard

D. Create an RDS Read Replica for the batch analysis and SQS to send a message to the on-premises system to update the dashboard.

Correct Answer:A

Question 143

Which of the following AWS CLI commands is syntactically incorrect?
1. $ aws ec2 describe-instances
2. $ aws ec2 start-instances --instance-ids i-1348636c
3. $ aws sns publish --topic-arn arn:aws:sns:us-east-1:546419318123:OperationsError -message "Script Failure"
4. $ aws sqs receive-message --queue-urI https://queue.amazonaws.com/546419318123/Test

A. 3

B. 4

C. 2

D. 1

Correct Answer:A
The following CLI command is missing a hyphen before "-message".
aws sns publish --topic-arn arn:aws:sns:us-east-1:546419318123:OperationsError -message "Script Failure"
It has been added below in red
aws sns publish --topic-arn arn:aws:sns:us-east-1:546419318123:OperationsError ---message "Script Failure"
Reference: http://aws.amazon.com/c|i/

Question 144

You are building infrastructure for a data warehousing solution and an extra request has come through that there will be a lot of business reporting queries running all the time and you are not sure if your current DB instance will be able to handle it. What would be the best solution for this?

A. DB Parameter Groups

B. Read Replicas

C. Multi-AZ DB Instance deployment

D. Database Snapshots

Correct Answer:B
Read Replicas make it easy to take advantage of MySQL’s built-in replication functionality to elastically scale out beyond the capacity constraints of a single DB Instance for read-heavy database workloads. There are a variety of scenarios where deploying one or more Read Replicas for a given source DB Instance may make sense. Common reasons for deploying a Read Replica include:
Scaling beyond the compute or I/O capacity of a single DB Instance for read-heavy database workloads. This excess read traffic can be directed to one or more Read Replicas.
Serving read traffic while the source DB Instance is unavailable. If your source DB Instance cannot take I/O requests (e.g. due to I/O suspension for backups or scheduled maintenance), you can direct read traffic to your Read RepIica(s). For this use case, keep in mind that the data on the Read Replica may be "staIe" since the source DB Instance is unavailable.
Business reporting or data warehousing scenarios; you may want business reporting queries to run against a Read Replica, rather than your primary, production DB Instance.
Reference: https://aws.amazon.com/rds/faqs/

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