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August 9, 2017

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Q41. After setting up several database instances in Amazon Relational Database Service (Amazon RDS) you decide that you need to track the performance and health of your databases. How can you do this?

A. Subscribe to Amazon RDS events to be notified when changes occur with a DB instance, DB snapshot, DB parameter group, or DB security group.

B. Use the free Amazon CIoudWatch service to monitor the performance and health of a DB instance.

C. All of the items listed will track the performance and health of a database.

D. View, download, or watch database log files using the Amazon RDS console or Amazon RDS APIs. You can also query some database log files that are loaded into database tables.

Answer:

Explanation:

Amazon Relational Database Service (Amazon RDS) is a web service that makes it easier to set up, operate, and scale a relational database in the cloud. It provides cost-efficient, resizeable capacity for an industry-standard relational database and manages common database administration tasks.

There are several ways you can track the performance and health of a database or a DB instance. You can:

Use the free Amazon CIoudWatch service to monitor the performance and health of a DB instance. Subscribe to Amazon RDS events to be notified when changes occur with a DB instance, DB snapshot, DB parameter group, or DB security group.

View, download, or watch database log files using the Amazon RDS console or Amazon RDS APIs. You can also query some database log files that are loaded into database tables.

Use the AWS CIoudTraiI service to record AWS calls made by your AWS account. The calls are recorded in log files and stored in an Amazon S3 bucket.

Reference:  http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_Monitoring.htmI


Q42. Can I move a Reserved Instance from one Region to another?

A. No

B. Only if they are moving into GovC|oud

C. Yes

D. Only if they are moving to US East from another region 

Answer: A


Q43. You are in the process of creating a Route 53 DNS failover to direct traffic to two EC2 zones. Obviously, if one fails, you would like Route 53 to direct traffic to the other region. Each region has an ELB with some instances being distributed. What is the best way for you to configure the Route 53 health check?

A. Route 53 doesn't support ELB with an internal health check.You need to create your own Route 53 health check of the ELB

B. Route 53 natively supports ELB with an internal health check. Turn "Eva|uate target health" off and "Associate with Health Check" on and R53 will use the ELB's internal health check.

C. Route 53 doesn't support ELB with an internal health check. You need to associate your resource record set for the ELB with your own health check

D. Route 53 natively supports ELB with an internal health check. Turn "Eva|uate target health" on and "Associate with Health Check" off and R53 will use the ELB's internal health check.

Answer:

Explanation:

With DNS Failover, Amazon Route 53 can help detect an outage of your website and redirect your end users to alternate locations where your application is operating properly. When you enable this feature, Route 53 uses health checks-regularly making Internet requests to your appIication’s endpoints from multiple locations around the world-to determine whether each endpoint of your application is up or down.

To enable DNS Failover for an ELB endpoint, create an Alias record pointing to the ELB and set the "EvaIuate Target HeaIth" parameter to true. Route 53 creates and manages the health checks for your ELB automatically. You do not need to create your own Route 53 health check of the ELB. You also do not need to associate your resource record set for the ELB with your own health check, because Route 53 automatically associates it with the health checks that Route 53 manages on your behalf. The ELB health check will also inherit the health of your backend instances behind that ELB.

Reference:

http://aws.amazon.com/about-aws/whats-new/2013/05/30/amazon-route-53-adds-elb-integration-for-dns- fai|over/


Q44. In Amazon RDS, security groups are ideally used to:

A. Define maintenance period for database engines

B. Launch Amazon RDS instances in a subnet

C. Create, describe, modify, and delete DB instances

D. Control what IP addresses or EC2 instances can connect to your databases on a DB instance 

Answer: D

Explanation:

In Amazon RDS, security groups are used to control what IP addresses or EC2 instances can connect to your databases on a DB instance.

When you first create a DB instance, its firewall prevents any database access except through rules specified by an associated security group.

Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/UsingWithRDS.htmI


Q45. Groups can't _.

A. be nested more than 3 levels

B. be nested at all

C. be nested more than 4 levels

D. be nested more than 2 levels 

Answer: B


Q46. An Elastic IP address (EIP) is a static IP address designed for dynamic cloud computing. With an EIP, you can mask the failure of an instance or software by rapidly remapping the address to another instance in your account. Your EIP is associated with your AWS account, not a particular EC2 instance, and it  remains associated with your account until you choose to explicitly release it. By default how many EIPs  is each AWS account limited to on a per region basis?

A. 1

B. 5

C. Unlimited

D. 10

Answer:

Explanation:

By default, all AWS accounts are limited to 5 Elastic IP addresses per region for each AWS account, because public (IPv4) Internet addresses are a scarce public resource. AWS strongly encourages you to use an EIP primarily for load balancing use cases, and use DNS hostnames for all other inter-node communication.

If you feel your architecture warrants additional EIPs, you would need to complete the Amazon EC2 Elastic IP Address Request Form and give reasons as to your need for additional addresses. Reference:

http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/elastic-ip-addresses-eip.htmI#using-instance-ad dressing-limit


Q47. Fill in the blanks: _ let you categorize your EC2 resources in different ways, for example, by purpose, owner, or environment.

A. wildcards

B. pointers

C. Tags

D. special filters 

Answer: C


Q48. Please select the Amazon EC2 resource which can be tagged.

A. key pairs

B. Elastic IP addresses

C. placement groups

D. Amazon EBS snapshots 

Answer: C


Q49. In an experiment, if the minimum size for an Auto Scaling group is 1 instance, which of the following statements holds true when you terminate the running instance?

A. Auto Scaling must launch a new instance to replace it.

B. Auto Scaling will raise an alarm and send a notification to the user for action.

C. Auto Scaling must configure the schedule actMty that terminates the instance after 5 days.

D. Auto Scaling will terminate the experiment. 

Answer: A

Explanation:

If the minimum size for an Auto Scaling group is 1 instance, when you terminate the running instance, Auto Scaling must launch a new instance to replace it.

Reference:http://docs.aws.amazon.com/AutoScaIing/latest/Deve|operGuide/AS_Concepts.htmI


Q50. AWS Identity and Access Management is a web service that enables Amazon Web Services (AWS) customers to manage users and user permissions in AWS. In addition to supporting IAM user policies, some services support resource-based permissions. Which of the following services are supported by

resource-based permissions?

A. Amazon SNS, and Amazon SQS and AWS Direct Connect.

B. Amazon S3 and Amazon SQS and Amazon EIastiCache.

C. Amazon S3, Amazon SNS, Amazon SQS, Amazon Glacier and Amazon EBS.

D. Amazon Glacier, Amazon SNS, and Amazon CIoudWatch 

Answer: C

Explanation:

In addition to supporting IAM user policies, some services support resource-based permissions, which let you attach policies to the service's resources instead of to IAM users or groups. Resource-based permissions are supported by Amazon S3, Amazon SNS, Amazon SQS, Amazon Glacier and Amazon EBS.

Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/Using_SpecificProducts.htm|



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