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
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-mapping-concepts.html
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.
B
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
Reference:
http://docs.aws.amazon.com/efs/latest/ug/accessing-fs-nfs-permissions.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
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-fs-install-nfsclient
A user is creating a Provisioned IOPS volume. What is the maximum ratio the user should configure between Provisioned IOPS and the volume size?
B
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
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?
D
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#performance-onpremises
Which of the following Amazon RDS storage types is ideal for applications with light or burst I/O requirements?
B
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.html
When I/O performance is more important than fault tolerance, which of the following configurations should be used?
C
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
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?
B
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
You have custom Network File System (NFS) client settings for your Amazon Elastic File System (EFS). It takes up to three seconds for an Amazon Elastic
Compute Cloud (EC2) instance to see a write operation performed on a file system from another Amazon EC2 instance.
Which of the following actions should you take to solve the custom NFS settings from causing delays in the write operation?
A
When you set up custom NFS client settings, it takes up to three seconds for an Amazon EC2 instance to see a write operation being performed on a file system from another Amazon EC2 instance. To solve this issue, you must unmount and remount your file system with the noac option to disable attribute caching if the
NFS client on the Amazon EC2 instance that is reading the data has attribute caching activated. Attribute cache can also be cleared on demand by using a programming language that is compatible with the NFS procedures. To do this, you must send an ACCESS procedure request immediately before a read request.
Reference:
http://docs.aws.amazon.com/efs/latest/ug/troubleshooting.html#custom-nfs-settings-write-delays
Which of the following rules must be added to a mount target security group to access Amazon Elastic File System (EFS) from an on-premises server?
D
By mounting an Amazon EFS file system on an on-premises server, on-premises data can be migrated into the AWS Cloud. Any one of the mount targets in your
VPC can be used as long as the subnet of the mount target is reachable by using the AWS Direct Connect connection. To access Amazon EFS from an on- premises server, a rule must be added to the mount target security group to allow inbound traffic to the NFS port (2049) from the on-premises server.
Reference:
http://docs.aws.amazon.com/efs/latest/ug/how-it-works.html
