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Q121. – (Topic 2)
A user is trying to understand the ACL and policy for an S3 bucket. Which of the below mentioned policy
permissions is equivalent to the WRITE ACL on a bucket?
Amazon S3 provides a set of operations to work with the Amazon S3 resources. Each AWS S3 bucket can have an ACL (Access Control List. or bucket policy associated with it. The WRITE ACL list allows the other AWS accounts to write/modify to that bucket. The equivalent S3 bucket policy permission for it is s3:DeleteObject.
Q122. – (Topic 2)
A user has created a photo editing software and hosted it on EC2. The software accepts requests from the user about the photo format and resolution and sends a message to S3 to enhance the picture accordingly.Which of the below mentioned AWS services will help make a scalable software with the AWS infrastructure in this scenario?
A. AWS Glacier
B. AWS Elastic Transcoder
C. AWS Simple Notification Service
D. AWS Simple Queue Service
Amazon Simple Queue Service (SQS. is a fast, reliable, scalable, and fully managed message queuing service. SQS provides a simple and cost-effective way to decouple the components of an application. The user can configure SQS, which will decouple the call between the EC2 application and S3. Thus, the application does not keep waiting for S3 to provide the data.
Q123. – (Topic 3)
George has launched three EC2 instances inside the US-East-1a zone with his AWS account. Ray has
launched two EC2 instances in the US-East-1a zone with his AWS account. Which of the below entioned statements will help George and Ray understand the availability zone (AZ. concept better?
A. The instances of George and Ray will be running in the same data centre
B. All the instances of George and Ray can communicate over a private IP with a minimal cost
C. All the instances of George and Ray can communicate over a private IP without any cost
D. The US-East-1a region of George and Ray can be different availability zones
Each AWS region has multiple, isolated locations known as Availability Zones. To ensure that the AWS resources are distributed across the Availability Zones for a region, AWS independently maps the Availability Zones to identifiers for each account. In this case the Availability Zone US-East-1a where Georgeâs EC2 instances are running might not be the same location as the US-East-1a zone of Rayâs EC2 instances. There is no way for the user to coordinate the Availability Zones between accounts.
Q124. – (Topic 2)
A user has created a VPC with CIDR 188.8.131.52/16 using the wizard. The user has created a public subnet CIDR (184.108.40.206/24. and VPN only subnets CIDR (220.127.116.11/24. along with the VPN gateway (vgw-12345. to connect to the userâs data centre. Which of the below mentioned options is a valid entry for the main route table in this scenario?
A. Destination: 18.104.22.168/24 and Target: vgw-12345
B. Destination: 22.214.171.124/16 and Target: ALL
C. Destination: 126.96.36.199/16 and Target: vgw-12345
D. Destination: 0.0.0.0/0 and Target: vgw-12345
The user can create subnets as per the requirement within a VPC. If the user wants to connect VPC from his own data centre, he can setup a public and VPN only subnet which uses hardware VPN access to connect with his data centre. When the user has configured this setup with Wizard, it will create a virtual private gateway to route all traffic of the VPN subnet. Here are the valid entries for the main route table in this scenario: Destination: 0.0.0.0/0 & Target: vgw-12345 (To route all internet traffic to the VPN gateway. Destination: 188.8.131.52/16 & Target: local (To allow local routing in VPC.
Q125. – (Topic 3)
A user has launched an EC2 Windows instance from an instance store backed AMI. The user has also set the Instance initiated shutdown behavior to stop. What will happen when the user shuts down the OS?
A. It will not allow the user to shutdown the OS when the shutdown behaviour is set to Stop
B. It is not possible to set the termination behaviour to Stop for an Instance store backed AMI instance
C. The instance will stay running but the OS will be shutdown
D. The instance will be terminated
When the EC2 instance is launched from an instance store backed AMI, it will not allow the user to configure the shutdown behaviour to âStopâ. It gives a warning that the instance does not have the EBS root volume.
Q126. – (Topic 3)
A user is trying to understand the detailed CloudWatch monitoring concept. Which of the below mentioned services provides detailed monitoring with CloudWatch without charging the user extra?
A. AWS Auto Scaling
B. AWS Route 53
C. AWS EMR
D. AWS SNS
CloudWatch is used to monitor AWS as well as the custom services. It provides either basic or detailed monitoring for the supported AWS products. In basic monitoring, a service sends data points to CloudWatch every five minutes, while in detailed monitoring a service sends data points to CloudWatch every minute. Services, such as RDS, ELB, OpsWorks, and Route 53 can provide the monitoring data every minute without charging the user.
Q127. – (Topic 3)
A user has created a VPC with the public and private subnets using the VPC wizard. The VPC has CIDR
184.108.40.206/16. The public subnet uses CIDR 220.127.116.11/24. The user is planning to host a web server in the public subnet (port 80. and a DB server in the private subnet (port 3306.. The user is configuring a security group for the public subnet (WebSecGrp. and the private subnet (DBSecGrp.. Which of the below mentioned entries is required in the web server security group (WebSecGrp.?
A. Configure Destination as DB Security group ID (DbSecGrp. for port 3306 Outbound
B. 80 for Destination 0.0.0.0/0 Outbound
C. Configure port 3306 for source 18.104.22.168/24 InBound
D. Configure port 80 InBound for source 22.214.171.124/16
A user can create a subnet with VPC and launch instances inside that subnet. If the user has created a public private subnet to host the web server and DB server respectively, the user should configure that the instances in the public subnet can receive inbound traffic directly from the internet. Thus, the user should configure port 80 with source 0.0.0.0/0 in InBound. The user should configure that the instance in the public subnet can send traffic to the private subnet instances on the DB port. Thus, the user should configure the DB Amazon AWS-SysOps : Practice Test
security group of the private subnet (DbSecGrp. as the destination for port 3306 in Outbound.
Q128. – (Topic 1)
You receive a frantic call from a new DBA who accidentally dropped a table containing all your customers.
Which Amazon RDS feature will allow you to reliably restore your database to within 5 minutes of when the mistake was made?
A. Multi-AZ RDS
B. RDS snapshots
C. RDS read replicas
D. RDS automated backup
Q129. – (Topic 2)
A user has configured a VPC with a new subnet. The user has created a security group. The user wants to configure that instances of the same subnet communicate with each other. How can the user configure this with the security group?
A. There is no need for a security group modification as all the instances can communicate with each other inside the same subnet
B. Configure the subnet as the source in the security group and allow traffic on all the protocols and ports
C. Configure the security group itself as the source and allow traffic on all the protocols and ports
D. The user has to use VPC peering to configure this
A Virtual Private Cloud (VPC. is a virtual network dedicated to the userâs AWS account. AWS provides two features that the user can use to increase security in VPC: security groups and network ACLs. Security groups work at the instance level. If the user is using the default security group it will have a rule which allows the instances to communicate with other. For a new security group the user has to specify the rule, add it to define the source as the security group itself, and select all the protocols and ports for that source.
Q130. – (Topic 3)
A user has granted read/write permission of his S3 bucket using ACL. Which of the below mentioned options is a valid ID to grant permission to other AWS accounts (grantee. using ACL?
A. IAM User ID
B. S3 Secure ID
C. Access ID
D. Canonical user ID
An S3 bucket ACL grantee can be an AWS account or one of the predefined Amazon S3 groups. The user can grant permission to an AWS account by the email address of that account or by the canonical user ID. If the user provides an email in the grant request, Amazon S3 finds the canonical user ID for that account and adds it to the ACL. The resulting ACL will always contain the canonical user ID for the AWS account, and not the AWS account's email address.