AWS-Solution-Architect-Associate Exam
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Q241. If an Amazon EBS volume is the root device of an instance, can I detach it without stopping the instance?
A. Yes but only if Windows instance
B. No
C. Yes
D. Yes but only if a Linux instance
Answer: B
Q242. You have just been given a scope for a new client who has an enormous amount of data(petabytes) that he constantly needs analysed. Currently he is paying a huge amount of money for a data warehousing company to do this for him and is wondering if AWS can provide a cheaper solution. Do you think AWS has a solution for this?
A. Yes. Amazon SimpIeDB
B. No. Not presently
C. Yes. Amazon Redshift
D. Yes. Your choice of relational AMIs on Amazon EC2 and EBS
Answer: C
Explanation:
Amazon Redshift is a fast, fully managed, petabyte-scale data warehouse service that makes it simple and cost-effective to efficiently analyze all your data using your existing business intelligence tools. You can start small for just $0.25 per hour with no commitments or upfront costs and scale to a petabyte or more for $1,000 per terabyte per year, less than a tenth of most other data warehousing solutions. Amazon Redshift delivers fast query performance by using columnar storage technology to improve I/O efficiency and parallelizing queries across multiple nodes. Redshift uses standard PostgreSQL JDBC and ODBC drivers, allowing you to use a wide range of familiar SQL clients. Data load speed scales linearly with cluster size, with integrations to Amazon S3, Amazon DynamoDB, Amazon Elastic MapReduce, Amazon Kinesis or any SSH-enabled host.
Reference: https://aws.amazon.com/running_databases/#redshift_anchor
Q243. What is the network performance offered by the c4.8xIarge instance in Amazon EC2?
A. 20 Gigabit
B. 10 Gigabit
C. Very High but variable
D. 5 Gigabit
Answer: B
Explanation:
Networking performance offered by the c4.8xIarge instance is 10 Gigabit. Reference: http://aws.amazon.com/ec2/instance-types/
Q244. Content and IV|edia Server is the latest requirement that you need to meet for a client.
The client has been very specific about his requirements such as low latency, high availability, durability, and access control. Potentially there will be millions of views on this server and because of "spiky" usage patterns, operations teams will need to provision static hardware, network, and management resources to support the maximum expected need. The Customer base will be initially low but is expected to grow and become more geographically distributed.
Which of the following would be a good solution for content distribution?
A. Amazon S3 as both the origin server and for caching
B. AWS Storage Gateway as the origin server and Amazon EC2 for caching
C. AWS CIoudFront as both the origin server and for caching
D. Amazon S3 as the origin server and Amazon CIoudFront for caching
Answer: D
Explanation:
As your customer base grows and becomes more geographically distributed, using a high- performance edge cache like Amazon CIoudFront can provide substantial improvements in latency, fault tolerance, and cost.
By using Amazon S3 as the origin server for the Amazon CIoudFront distribution, you gain the advantages of fast in-network data transfer rates, simple publishing/caching workflow, and a unified security framework.
Amazon S3 and Amazon CIoudFront can be configured by a web service, the AWS Management Console, or a host of third-party management tools.
Reference:http://media.amazonwebservices.com/architecturecenter/AWS_ac_ra_media_02.pdf
Q245. Which AWS instance address has the following characteristics? :" If you stop an instance, its Elastic IP address is unmapped, and you must remap it when you restart the instance."
A. Both A and B
B. None of these
C. VPC Addresses
D. EC2 Addresses
Answer: A
Q246. To view information about an Amazon EBS volume, open the Amazon EC2 console at https://console.aws.amazon.com/ec2/, click in the Navigation pane.
A. EBS
B. Describe
C. Details
D. Volumes
Answer: D
Q247. You have just set up a large site for a client which involved a huge database which you set up with Amazon RDS to run as a Mu|ti-AZ deployment. You now start to worry about what will happen if the database instance fails. Which statement best describes how this database will function if there is a database failure?
A. Updates to your DB Instance are synchronously replicated across Availability Zones to the standby in order to keep both in sync and protect your latest database updates against DB Instance failure.
B. Your database will not resume operation without manual administrative intervention.
C. Updates to your DB Instance are asynchronously replicated across Availability Zones to the standby in order to keep both in sync and protect your latest database updates against DB Instance failure.
D. Updates to your DB Instance are synchronously replicated across S3 to the standby in order to keep both in sync and protect your latest database updates against DB Instance failure.
Answer: A
Explanation:
Amazon Relational Database Service (Amazon RDS) is a managed service that makes it easy to set up, operate, and scale a relational database in the cloud. It provides cost-efficient and resizable capacity, while managing time-consuming database administration tasks, freeing you up to focus on your applications and business.
When you create or modify your DB Instance to run as a MuIti-AZ deployment, Amazon RDS automatically provisions and maintains a synchronous "standby" replica in a different Availability Zone. Updates to your DB Instance are synchronously replicated across Availability Zones to the standby in order to keep both in sync and protect your latest database updates against DB Instance failure.
During certain types of planned maintenance, or in the unlikely event of DB Instance failure or Availability Zone failure, Amazon RDS will automatically failover to the standby so that you can resume database writes and reads as soon as the standby is promoted. Since the name record for your DB Instance
remains the same, you application can resume database operation without the need for manual administrative intervention. With Mu|ti-AZ deployments, replication is transparent: you do not interact directly with the standby, and it cannot be used to serve read traffic. If you are using Amazon RDS for MySQL and are looking to scale read traffic beyond the capacity constraints of a single DB Instance, you can deploy one or more Read Replicas.
Reference: http://aws.amazon.com/rds/faqs/
Q248. My Read Replica appears "stuck" after a MuIti-AZ failover and is unable to obtain or apply updates from the source DB Instance. What do I do?
A. You will need to delete the Read Replica and create a new one to rep lace it.
B. You will need to disassociate the DB Engine and re associate it.
C. The instance should be deployed to Single AZ and then moved to MuIti- AZ once again
D. You will need to delete the DB Instance and create a new one to replace it.
Answer: A
Q249. An International company has deployed a multi-tier web application that relies on DynamoDB in a single region For regulatory reasons they need disaster recovery capability In a separate region with a Recovery Time Objective of 2 hours and a Recovery Point Objective of 24 hours They should synchronize their data on a regular basis and be able to provision me web application rapidly using CIoudFormation.
The objective is to minimize changes to the existing web application, control the throughput of DynamoDB used for the synchronization of data and synchronize only the modified elements.
Which design would you choose to meet these requirements?
A. Use AWS data Pipeline to schedule a DynamoDB cross region copy once a day. create a Last updated' attribute in your DynamoDB table that would represent the timestamp of the last update and use it as a filter.
B. Use EMR and write a custom script to retrieve data from DynamoDB in the current region using a SCAN operation and push it to Dynamo DB in the second region.
C. Use AWS data Pipeline to schedule an export of the DynamoDB table to 53 in the current region once a day then schedule another task immediately after it that will import data from 53 to DynamoDB in the other region.
D. Send also each Ante into an SOS queue in me second region; use an auto-scaling group behind the SOS queue to replay the write in the second region.
Answer: A
Q250. A user has launched one EC2 instance in the US East region and one in the US West region. The user has launched an RDS instance in the US East region. How can the user configure access from both the EC2 instances to RDS?
A. It is not possible to access RDS of the US East region from the US West region
B. Configure the US West region’s security group to allow a request from the US East region’s instance and configure the RDS security group’s ingress rule for the US East EC2 group
C. Configure the security group of the US East region to allow traffic from the US West region’s instance and configure the RDS security group’s ingress rule for the US East EC2 group
D. Configure the security group of both instances in the ingress rule of the RDS security group
Answer: C
Explanation:
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. In this case allow IP of US West inside US East’s security group and open the RDS security group for US East region.
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithSecurityGroups.html