Practice Test

visioned IOPS SSD (io1)
B. General Purpose SSD (gp2)
C. Throughput Optimized HDD (st1)
D. Cold HDD (sc1)
Answer: A. Provisioned IOPS SSD (io1)
Explanation: Provisioned IOPS SSD (io1) is designed to deliver consistent, high performance for I/O intensive workloads.


True/False: Amazon CloudWatch is the service used to monitor Amazon EBS metrics.

  • Answer: True

Explanation: Amazon CloudWatch is used to monitor Amazon Elastic Block Store (EBS) metrics and understand the performance efficiency.

What can be used to monitor the performance of Amazon EBS volumes?

  • A. Amazon EC2
  • B. Amazon CloudWatch
  • C. Amazon S3
  • D. None of the above
  • Answer: B. Amazon CloudWatch

Explanation: Amazon CloudWatch provides metrics for Amazon EBS volumes which allows us to monitor its performance.

True/False: Enabling detailed monitoring on Amazon EBS volumes can result in additional charges.

  • Answer: True

Explanation: Detailed monitoring on Amazon EBS volumes provides higher-resolution data but comes with additional charges.

Which of the following is not a metric provided by Amazon CloudWatch for Amazon EBS?

  • A. VolumeReadOps
  • B. VolumeQueueLength
  • C. VolumeTotalReadTime
  • D. VolumeCost
  • Answer: D. VolumeCost

Explanation: VolumeCost is not a metric provided by CloudWatch for Amazon EBS.

You can modify Amazon EBS volume type and size without stopping the instance. (True/False)

  • Answer: False

Explanation: You need to detach the volume, modify it, and then reattach it to the instance. This process requires you to stop the instance.

What type of EBS volume offers the highest performance?

  • A. Provisioned IOPS SSD (io1)
  • B. General Purpose SSD (gp2)
  • C. Throughput Optimized HDD (st1)
  • D. Cold HDD (sc1)
  • Answer: A. Provisioned IOPS SSD (io1)

Explanation: Provisioned IOPS SSD (io1) is designed to deliver consistent, high performance for I/O intensive workloads.


Interview Questions

What is Amazon Elastic Block Store (Amazon EBS)?

Amazon EBS provides persistent block storage volumes for use with Amazon EC2 instances in the AWS Cloud. Each EBS volume is automatically replicated within its Availability Zone to protect you from component failure, offering high availability and durability.

Why should one monitor Amazon EBS metrics?

Monitoring Amazon EBS metrics helps to evaluate the volume usage, diagnose potential issues, and improve capacity as required.

Which AWS service is primarily used to monitor Amazon EBS metrics?

Amazon CloudWatch is the primary AWS service used for monitoring Amazon EBS metrics.

Can you increase the performance of an Amazon EBS volume?

Yes, you can increase performance by modifying the IOPS, throughput, or both, of an EBS volume.

What does the BurstBalance Amazon EBS metric measure?

The BurstBalance metric measures the capacity of your volume to burst IOPS or throughput in addition to its baseline performance level.

How can you improve the performance of your Amazon EBS volumes in terms of IOPS?

The IOPS performance of your Amazon EBS volumes can be improved by provisioned IOPS SSD (io1 or io2 volumes), increasing your volume size, or increasing the number of volumes and striping your data across those volumes.

What is IO size and how can changing it affect Amazon EBS performance?

IO size is the length of the data in an I/O operation. By tuning your I/O size to align with your Amazon EBS volume configuration, you can optimize performance.

What is the significance of the VolumeReadOps and VolumeWriteOps Amazon EBS metrics?

VolumeReadOps and VolumeWriteOps metrics represent the total number of read and write operations from or to your EBS volume, respectively. High values can indicate heavy usage, potentially needing a volume resizing or performance modifications.

What is the impact of EBS-optimized instances on Amazon EBS performance?

EBS-optimized instances provide dedicated capacity for Amazon EBS I/O and can provide higher performance for I/O intensive workloads.

What is the general purpose of the Volume Queue Length metric in Amazon EBS?

The Volume Queue Length metric indicates the number of outstanding I/O requests waiting to be served by your Amazon EBS volume. A consistently high queue length could indicate that the volume’s performance is not currently able to keep up with the demand.

How can Amazon EBS metrics assist in cost optimization?

By monitoring your EBS volumes’ usage and performance metrics, you can right-size your volumes for your workload, and avoid paying for more storage or performance than you need.

What are the benefits of using Amazon EBS Snapshot?

Amazon EBS Snapshots allow you to make point-in-time copies of your data, which can be used to enable disaster recovery, migrate data across regions or accounts, improve backup compliance, or create large test and development environments.

How can you view your Amazon EBS metrics?

You can view your EBS metrics by using the AWS Management Console, the CloudWatch console, the AWS CLI, or programmatically via the AWS SDKs.

What is the impact of the size of the EBS volume on its performance?

In general, larger volumes can deliver higher levels of throughput and IOPS. The actual performance can depend on many factors, including the type of EBS volume, the configuration of your EC2 instance, and your applications’ I/O characteristics.

Does changing the Amazon EBS volume type affect its performance?

Yes, changing the volume type can impact the performance of your Amazon EBS volume. Each volume type offers different performance characteristics and is suitable for different kinds of workloads.

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