Amazon Elastic File System (EFS) provides information about the space used for an object by using the space _ used attribute of the Network File System Version 4.1 (NFSv4.1). The attribute includes the object's current metered data size and not the metadata size. Which of the following utilities will you use to measure the amount of disk that is used of a file? A. blkid utility B. du utility C. sfdisk utility D. pydf utility
Correct Answer: B
Explanation:
Explanation: Amazon EFS reports file system sizes and sizes of objects within a file system. Using the NFSv4.1 space _ used attribute for measuring the space used for an object, it reports only the object’s current metered data size and not the metadata size. There are two utilities available for measuring disk usage of a file, the du and stat utilities.
Reference: https://docs.aws.amazon.com/efs/latest/ug/metered-sizes.html
When I/O performance is more important than fault tolerance, which of the following configurations should be used? A. SPAN 10 B. RAID 1 C. RAID 0 D. NFS 1
Correct Answer: C
Explanation:
Explanation: When I/O performance is more important than fault tolerance, the RAID 0 configuration must be used; for example, as in a heavily used database (where data replication is already set up separately).
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/raid-config.html
Which of the following Amazon RDS storage types is ideal for applications with light or burst I/O requirements? A. Both magnetic and Provisioned IOPS storage B. Magnetic storage C. Provisioned IOPS storage D. None of these
Correct Answer: B
Explanation:
Explanation: Amazon RDS provides three storage types: magnetic, General Purpose (SSD), and Provisioned IOPS (input/output operations per second). Magnetic (Standard) storage is ideal for applications with light or burst I/O requirements.
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_Storage….
Your Application is not highly available, and your on-premises server cannot access the mount target because the Availability Zone (AZ) in which the mount target exists is unavailable.
Which of the following actions is recommended? A. The application must implement the checkpoint logic and recreate the mount target. B. The application must implement the shutdown logic and delete the mount target in the AZ. C. The application must implement the delete logic and connect to a different mount target in the same AZ. D. The application must implement the restart logic and connect to a mount target in a different AZ.
Correct Answer: D
Explanation:
Explanation: To make sure that there is continuous availability between your on-premises data center and your Amazon Virtual Private Cloud (VPC), it is suggested that you configure two AWS Direct Connect connections. Your application should implement restart logic and connect to a mount target in a different AZ if your application is not highly available and your on-premises server cannot access the mount target because the AZ in which the mount target exists becomes unavailable.
Reference: http://docs.aws.amazon.com/efs/latest/ug/performance.html#performan…
A user is creating a Provisioned IOPS volume. What is the maximum ratio the user should configure between Provisioned IOPS and the volume size? A. 30 to 1 B. 50 to 1 C. 10 to 1 D. 20 to 1
Correct Answer: B
Explanation:
Explanation: Provisioned IOPS SSD (io1) volumes are designed to meet the needs of I/O-intensive workloads, particularly database workloads, that are sensitive to storage performance and consistency. An io1 volume can range in size from 4 GiB to 16 TiB and you can provision 100 up to 20,000 IOPS per volume. The maximum ratio of provisioned IOPS to requested volume size (in GiB) is 50:1. For example, a 100 GiB volume can be provisioned with up to 5,000 IOPS. Any volume 400 GiB in size or greater allows provisioning up to the 20,000 IOPS maximum.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSVolumeTypes.html
You want to mount an Amazon EFS file system on an Amazon EC2 instance using DNS names. Which of the following generic form of a mount target's DNS name must you use to mount the file system? A. availability-zone.file-system-id.efs.aws-region.amazonaws.com B. efs-system-id.availability-zone.file-aws-region.amazonaws.com C. $file-system-id.$availability-zone.$efs.aws-region.$amazonaws.com D. #aws-region.#availability-zone.#file-system-id.#efs.#amazonaws.com
Correct Answer: A
Explanation:
Explanation: An Amazon EFS file system can be mounted on an Amazon EC2 instance using DNS names. This can be done with either a DNS name for the file system or a DNS name for the mount target. To construct the mount target’s DNS name, use the following generic form: availability-zone.file-system-id.efs.aws-region.amazonaws.com
Reference: http://docs.aws.amazon.com/efs/latest/ug/mounting-fs.html#mounting-…
You create an Amazon Elastic File System (EFS) file system and mount targets for the file system in your Virtual Private Cloud (VPC). Identify the initial permissions you can grant to the group root of your file system. A. write-execute-modify B. read-execute C. read-write-modify D. read-write
Correct Answer: B
Explanation:
Explanation: In Amazon EFS, when a file system and mount targets are created in your VPC, you can mount the remote file system locally on your Amazon Elastic Compute Cloud (EC2) instance. You can grant permissions to the users of your file system. The initial permissions mode allowed for Amazon EFS are:
read-write-execute permissions to the owner root
read-execute permissions to the group root read-execute permissions to others
In Amazon Elastic Compute Cloud, you can specify storage volumes in addition to the root device volume when you create an AMI or when launching a new instance using______. A. block device mapping B. object mapping C. batch storage mapping D. datacenter mapping
Correct Answer: A
Explanation:
Explanation: When creating an AMI or launching a new instance, you can assign more than one block storage device to it. This device will be automatically set ready for you through an automated process known as block device mapping.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/block-device-map…
A user has launched two EBS backed EC2 instances in the US-East-1a region. The user wants to change the zone of one of the instances. How can the user change it? A. It is not possible to change the zone of an instance after it is launched B. From the AWS EC2 console, select the Actions – > Change zones and specify the new zone C. The zone can only be modified using the AWS CLI D. Stop one of the instances and change the availability zone
Correct Answer: A
Explanation:
Explanation: With AWS EC2, when a user is launching an instance he can select the availability zone (AZ) at the time of launch. If the zone is not selected, AWS selects it on behalf of the user. Once the instance is launched, the user cannot change the zone of that instance unless he creates an AMI of that instance and launches a new instance from it.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-av…
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