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Q261. When should I choose Provisioned IOPS over Standard RDS storage?
A. If you have batch-oriented workloads
B. If you use production online transaction processing (OLTP) workloads.
C. If you have workloads that are not sensitive to consistent performance
Answer: A
Q262. A user is currently building a website which will require a large number of instances in six months, when a demonstration of the new site will be given upon launch.
Which of the below mentioned options allows the user to procure the resources beforehand so that they need not worry about infrastructure availability during the demonstration?
A. Procure all the instances as reserved instances beforehand.
B. Launch all the instances as part of the cluster group to ensure resource availability.
C. Pre-warm all the instances one month prior to ensure resource availability.
D. Ask AWS now to procure the dedicated instances in 6 months.
Answer: A
Explanation:
Amazon Web Services has massive hardware resources at its data centers, but they are finite. The best way for users to maximize their access to these resources is by reserving a portion of the computing capacity that they require. This can be done through reserved instances. With reserved instances, the user literally reserves the computing capacity in the Amazon Web Services cloud.
Reference: http://media.amazonwebservices.com/AWS_Building_FauIt_To|erant_AppIications.pdf
Q263. What is the maximum write throughput I can provision for a single Dynamic DB table?
A. 1,000 write capacity units
B. 100,000 write capacity units
C. Dynamic DB is designed to scale without limits, but if you go beyond 10,000 you have to contact AWS first.
D. 10,000 write capacity units
Answer: C
Q264. An accountant asks you to design a small VPC network for him and, due to the nature of his business, just needs something where the workload on the network will be low, and dynamic data will be accessed infrequently. Being an accountant, low cost is also a major factor. Which EBS volume type would best suit his requirements?
A. Magnetic
B. Any, as they all perform the same and cost the same.
C. General Purpose (SSD)
D. Magnetic or Provisioned IOPS (SSD)
Answer: A
Explanation:
You can choose between three EBS volume types to best meet the needs of their workloads: General Purpose (SSD), Provisioned IOPS (SSD), and Magnetic. General Purpose (SSD) is the new, SSD-backed, general purpose EBS volume type that we recommend as the default choice for customers. General Purpose (SSD) volumes are suitable for a broad range of workloads, including small to medium sized databases, development and test environments, and boot volumes. Provisioned IOPS (SSD) volumes offer storage with consistent and low-latency performance, and are designed for I/O intensive applications such as large relational or NoSQL databases. Magnetic volumes provide the lowest cost per gigabyte of all EBS volume types. Magnetic volumes are ideal for workloads where data is accessed infrequently, and applications where the lowest storage cost is important.
Reference: https://aws.amazon.com/ec2/faqs/
Q265. Which one of the below is not an AWS Storage Service?
A. Amazon S3
B. Amazon Glacier
C. Amazon CIoudFront
D. Amazon EBS
Answer: C
Explanation:
AWS Storage Services are: Amazon S3
Amazon Glacier Amazon EBS
AWS Storage Gateway
Reference: https://consoIe.aws.amazon.com/console
Q266. Can I initiate a "forced failover" for my MySQL Multi-AZ DB Instance deployment?
A. Only in certain regions
B. Only in VPC
C. Yes
D. No
Answer: A
Q267. You are checking the workload on some of your General Purpose (SSD) and Provisioned IOPS (SSD) volumes and it seems that the I/O latency is higher than you require. You should probably check the to make sure that your application is not trying to drive more IOPS than you have
provisioned.
A. Amount of IOPS that are available
B. Acknowledgement from the storage subsystem
C. Average queue length
D. Time it takes for the I/O operation to complete
Answer: C
Explanation:
In EBS workload demand plays an important role in getting the most out of your General Purpose (SSD) and Provisioned IOPS (SSD) volumes. In order for your volumes to deliver the amount of IOPS that are available, they need to have enough I/O requests sent to them. There is a relationship between the demand on the volumes, the amount of IOPS that are available to them, and the latency of the request (the amount of time it takes for the I/O operation to complete).
Latency is the true end-to-end client time of an I/O operation; in other words, when the client sends a IO, how long does it take to get an acknowledgement from the storage subsystem that the IO read or write is complete.
If your I/O latency is higher than you require, check your average queue length to make sure that your application is not trying to drive more IOPS than you have provisioned. You can maintain high IOPS while keeping latency down by maintaining a low average queue length (which is achieved by provisioning more IOPS for your volume).
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-workload-demand.htmI
Q268. Which of the below mentioned options is not available when an instance is launched by Auto Scaling with EC2 Classic?
A. Public IP
B. Elastic IP
C. Private DNS
D. Private IP
Answer: B
Explanation:
Auto Scaling supports both EC2 classic and EC2-VPC. When an instance is launched as a part of EC2 classic, it will have the public IP and DNS as well as the private IP and DNS.
Reference: http://docs.aws.amazon.com/AutoScaIing/latest/DeveIoperGuide/GettingStartedTutoriaI.html
Q269. Fill in the blanks: Resources that are created in AWS are identified by a unique identifier called an
A. Amazon Resource Number
B. Amazon Resource Nametag
C. Amazon Resource Name
D. Amazon Resource Namespace
Answer: C
Q270. You have set up an Auto Scaling group. The cool down period for the Auto Scaling group is 7 minutes. The first instance is launched after 3 minutes, while the second instance is launched after 4 minutes. How many minutes after the first instance is launched will Auto Scaling accept another scaling actMty request?
A. 11 minutes
B. 7 minutes
C. 10 minutes
D. 14 minutes
Answer: A
Explanation:
If an Auto Scaling group is launching more than one instance, the cool down period for each instance starts after that instance is launched. The group remains locked until the last instance that was launched has completed its cool down period. In this case the cool down period for the first instance starts after 3 minutes and finishes at the 10th minute (3+7 cool down), while for the second instance it starts at the 4th minute and finishes at the 11th minute (4+7 cool down). Thus, the Auto Scaling group will receive another request only after 11 minutes.
Reference:http://docs.aws.amazon.com/AutoScaIing/latest/Deve|operGuide/AS_Concepts.htmI