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August 5, 2017

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Q161. - (Topic 3) 

A user is creating a Cloudformation stack. Which of the below mentioned limitations does not hold true for 

Cloudformation? 

A. One account by default is limited to 100 templates 

B. The user can use 60 parameters and 60 outputs in a single template 

C. The template, parameter, output, and resource description fields are limited to 4096 characters 

D. One account by default is limited to 20 stacks 

Answer:

Explanation: 

AWS Cloudformation is an application management tool which provides application modelling, deployment, configuration, management and related activities. The limitations given below apply to the Cloudformation template and stack. There are no limits to the number of templates but each AWS CloudFormation account is limited to a maximum of 20 stacks by default. The Template, Parameter, Output, and Resource description fields are limited to 4096 characters. The user can include up to 60 parameters and 60 outputs in a template. 


Q162. - (Topic 3) 

A user is planning to scale up an application by 8 AM and scale down by 7 PM daily using Auto Scaling. What should the user do in this case? 

A. Setup the scaling policy to scale up and down based on the CloudWatch alarms 

B. The user should increase the desired capacity at 8 AM and decrease it by 7 PM manually 

C. The user should setup a batch process which launches the EC2 instance at a specific time 

D. Setup scheduled actions to scale up or down at a specific time 

Answer:

Explanation: 

Auto Scaling based on a schedule allows the user to scale the application in response to predictable load changes. To configure the Auto Scaling group to scale based on a schedule, the user needs to create scheduled actions. A scheduled action tells Auto Scaling to perform a scaling action at a certain time in the future. 


Q163. - (Topic 2) 

A user has recently started using EC2. The user launched one EC2 instance in the default subnet in EC2-VPC Which of the below mentioned options is not attached or available with the EC2 instance when it is launched? 

A. Public IP address 

B. Internet gateway 

C. Elastic IP 

D. Private IP address 

Answer:

Explanation: 

A Virtual Private Cloud (VPC. is a virtual network dedicated to a user’s AWS account. A subnet is a range of IP addresses in the VPC. The user can launch the AWS resources into a subnet. There are two supported platforms into which a user can launch instances: EC2-Classic and EC2-VPC (default subnet.. A default VPC has all the benefits of EC2-VPC and the ease of use of EC2-Classic. Each instance that the user launches into a default subnet has a private IP address and a public IP address. These instances can communicate with the internet through an internet gateway. An internet gateway enables the EC2 instances to connect to the internet through the Amazon EC2 network edge. 


Q164. - (Topic 3) 

A user is trying to connect to a running EC2 instance using SSH. However, the user gets a Host key not found error. Which of the below mentioned options is a possible reason for rejection? 

A. The user has provided the wrong user name for the OS login 

B. The instance CPU is heavily loaded 

C. The security group is not configured properly 

D. The access key to connect to the instance is wrong 

Answer:

Explanation: 

If the user is trying to connect to a Linux EC2 instance and receives the Host Key not found error the probable reasons are: The private key pair is not right The user name to login is wrong 


Q165. - (Topic 3) 

A user is trying to setup a security policy for ELB. The user wants ELB to meet the cipher supported by the client by configuring the server order preference in ELB security policy. Which of the below mentioned 

preconfigured policies supports this feature? 

A. ELBSecurity Policy-2014-01 

B. ELBSecurity Policy-2011-08 

C. ELBDefault Negotiation Policy 

D. ELBSample- OpenSSLDefault Cipher Policy 

Answer:

Explanation: 

Elastic Load Balancing uses a Secure Socket Layer (SSL. negotiation configuration which is known as a Security Policy. It is used to negotiate the SSL connections between a client and the load balancer. If the load balancer is configured to support the Server Order Preference, then the load balancer gets to select the first cipher in its list that matches any one of the ciphers in the client's list. When the user verifies the preconfigured policies supported by ELB, the policy “ELBSecurity Policy-2014-01” supports server order preference. 


Q166. - (Topic 3) 

A user has hosted an application on EC2 instances. The EC2 instances are configured with ELB and Auto Scaling. The application server session time out is 2 hours. The user wants to configure connection draining to ensure that all in-flight requests are supported by ELB even though the instance is being deregistered. What time out period should the user specify for connection draining? 

A. 5 minutes 

B. 1 hour 

C. 30 minutes 

D. 2 hours 

Answer:


Q167. - (Topic 1) 

A customer has a web application that uses cookie Based sessions to track logged in users It Is deployed on AWS using ELB and Auto Scaling The customer observes that when load increases. Auto Scaling launches new Instances but the load on the easting Instances does not decrease, causing all existing users to have a sluggish experience. 

Which two answer choices independently describe a behavior that could be the cause of the sluggish user experience? Choose 2 answers 

A. ELB's normal behavior sends requests from the same user to the same backend instance 

B. ELB's behavior when sticky sessions are enabled causes ELB to send requests in the same session to the same backend instance 

C. A faulty browser is not honoring the TTL of the ELB DNS name. 

D. The web application uses long polling such as comet or websockets. Thereby keeping a connection open to a web server tor a long time 

E. The web application uses long polling such as comet or websockets. Thereby keeping a connection open to a web server for a long time. 

Answer: B,D 


Q168. - (Topic 2) 

A system admin is managing buckets, objects and folders with AWS S3. Which of the below mentioned statements is true and should be taken in consideration by the sysadmin? 

A. The folders support only ACL 

B. Both the object and bucket can have an Access Policy but folder cannot have policy 

C. Folders can have a policy 

D. Both the object and bucket can have ACL but folders cannot have ACL 

Answer:

Explanation: 

A sysadmin can grant permission to the S3 objects or the buckets to any user or make objects public using the bucket policy and user policy. Both use the JSON-based access policy language. Generally if user is defining the ACL on the bucket, the objects in the bucket do not inherit it and vice a versa. The bucket policy can be defined at the bucket level which allows the objects as well as the bucket to be public with a single policy applied to that bucket. It cannot be applied at the object level. The folders are similar to objects with no content. Thus, folders can have only ACL and cannot have a policy. 


Q169. - (Topic 2) 

A root account owner has created an S3 bucket testmycloud. The account owner wants to allow everyone to upload the objects as well as enforce that the person who uploaded the object should manage the permission of those objects. Which is the easiest way to achieve this? 

A. The root account owner should create a bucket policy which allows the IAM users to upload the object 

B. The root account owner should create the bucket policy which allows the other account owners to set the object policy of that bucket 

C. The root account should use ACL with the bucket to allow everyone to upload the object 

D. The root account should create the IAM users and provide them the permission to upload content to the bucket 

Answer:

Explanation: 

Each AWS S3 bucket and object has an ACL (Access Control List. associated with it. An ACL is a list of grants identifying the grantee and the permission granted. The user can use ACLs to grant basic read/write permissions to other AWS accounts. ACLs use an Amazon S3–specific XML schema. The user cannot grant permissions to other users in his account. ACLs are suitable for specific scenarios. For example, if a bucket owner allows other AWS accounts to upload objects, permissions to these objects can only be managed using the object ACL by the AWS account that owns the object. 


Q170. - (Topic 2) 

A user has created an ELB with Auto Scaling. Which of the below mentioned offerings from ELB helps the user to stop sending new requests traffic from the load balancer to the EC2 instance when the instance is being deregistered while continuing in-flight requests? 

A. ELB sticky session 

B. ELB deregistration check 

C. ELB connection draining 

D. ELB auto registration Off 

Answer:

Explanation: 

The Elastic Load Balancer connection draining feature causes the load balancer to stop sending new requests to the back-end instances when the instances are deregistering or become unhealthy, while ensuring that inflight requests continue to be served. 



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