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Q73. - (Topic 2)
A user is planning to setup infrastructure on AWS for the Christmas sales. The user is planning to use Auto Scaling based on the schedule for proactive scaling. What advise would you give to the user?
A. It is good to schedule now because if the user forgets later on it will not scale up
B. The scaling should be setup only one week before Christmas
C. Wait till end of November before scheduling the activity
D. It is not advisable to use scheduled based scaling
Answer: C
Explanation:
Auto Scaling based on a schedule allows the user to scale the application in response to predictable load changes. The user can specify any date in the future to scale up or down during that period. As per Auto Scaling the user can schedule an action for up to a month in the future. Thus, it is recommended to wait until end of November before scheduling for Christmas.
Q74. - (Topic 2)
A user is planning to use AWS Cloud formation for his automatic deployment requirements. Which of the below mentioned components are required as a part of the template?
A. Parameters
B. Outputs
C. Template version
D. Resources
Answer: D
Explanation:
AWS Cloud formation is an application management tool which provides application modelling, deployment, configuration, management and related activities. The template is a JSON-format, text-based file that describes all the AWS resources required to deploy and run an application. It can have option fields, such as Template Parameters, Output, Data tables, and Template file format version. The only mandatory value is Resource. The user can define the AWS services which will be used/ created by this template inside the Resource section
Q75. - (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
Answer: D
Explanation:
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 George’s EC2 instances are running might not be the same location as the US-East-1a zone of Ray’s EC2 instances. There is no way for the user to coordinate the Availability Zones between accounts.
Q76. - (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: A
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
Q77. - (Topic 3)
A user is configuring a CloudWatch alarm on RDS to receive a notification when the CPU utilization of RDS is higher than 50%. The user has setup an alarm when there is some inactivity on RDS, such as RDS unavailability. How can the user configure this?
A. Setup the notification when the CPU is more than 75% on RDS
B. Setup the notification when the state is Insufficient Data
C. Setup the notification when the CPU utilization is less than 10%
D. It is not possible to setup the alarm on RDS
Answer: B
Explanation:
Amazon CloudWatch alarms watch a single metric over a time period that the user specifies and performs one or more actions based on the value of the metric relative to a given threshold over a number of time periods. The alarm has three states: Alarm, OK and Insufficient data. The Alarm will change to Insufficient Data when any of the three situations arise: when the alarm has just started, when the metric is not available or when enough data is not available for the metric to determine the alarm state. If the user wants to find that RDS is not available, he can setup to receive the notification when the state is in Insufficient data.
Q78. - (Topic 1)
If you want to launch Amazon Elastic Compute Cloud (EC2) Instances and assign each Instance a predetermined private IP address you should:
A. Assign a group or sequential Elastic IP address to the instances
B. Launch the instances in a Placement Group
C. Launch the instances in the Amazon virtual Private Cloud (VPC).
D. Use standard EC2 instances since each instance gets a private Domain Name Service (DNS) already
E. Launch the Instance from a private Amazon Machine image (Mil)
Answer: C
Explanation: Reference:
http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/vpc-ip-addressing.html
Q79. - (Topic 1)
What would happen to an RDS (Relational Database Service) multi-Availability Zone deployment of the primary OB instance fails?
A. The IP of the primary DB instance is switched to the standby OB instance
B. The RDS (Relational Database Service) DB instance reboots
C. A new DB instance is created in the standby availability zone
D. The canonical name record (CNAME) is changed from primary to standby
Answer: D
Q80. - (Topic 3)
A user has launched an EBS backed EC2 instance in the US-East-1a region. The user stopped the instance and started it back after 20 days. AWS throws up an ‘InsufficientInstanceCapacity’ error. What can be the possible reason for this?
A. AWS does not have sufficient capacity in that availability zone
B. AWS zone mapping is changed for that user account
C. There is some issue with the host capacity on which the instance is launched
D. The user account has reached the maximum EC2 instance limit
Answer: A
Explanation:
When the user gets an ‘InsufficientInstanceCapacity’ error while launching or starting an EC2 instance, it means that AWS does not currently have enough available capacity to service the user request. If the user is requesting a large number of instances, there might not be enough server capacity to host them. The user can either try again later, by specifying a smaller number of instances or changing the availability zone if launching a fresh instance.