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Quiz by Robin d.

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22 questions
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  • Q1
    To save costs, you shut down some of your EC2 servers over the weekend that were used to deploy your application. One Monday when you try the application, you realize that you are not able to start the application since all the data that was stored in the application is gone. What could be the reason for this?
    There must be a failure in the EBS volume for all the EC2 servers
    You must have used the instance store for storing all the data.
    You forgot to connect to the EBS volume after restarting the EC2 servers on Monday.
    Someone must have edited your /etc/fstab parameter file.
  • Q2
    You are running a SQL Server database that is very I/O intense on EC2 instances. Your application needs a minimum of 4200 IOPS, or it won’t perform optimally. How do you make sure that your application always performs optimally?
    Move to a bigger class of EC2 instance.
    Use Elastic File System.
    Use a general-purpose SSD-based EBS volume.
    Use Provisioned IOPS SSD to meet the IOPS number.
  • Q3
    You need to retain all the data for seven years for compliance purposes. You have more than 300TB of data. You are storing everything in the tape drive for compliance, and over the years you have found out it is costing you a lot of money to maintain the tape infrastructure. Moreover, the restore from the tape takes more than 24 hours. You want to reduce it to 12 hours. You have heard that if you move your tape infrastructure to the cloud, it will be much cheaper, and you can meet the SLA you are looking for. What service would you choose?
    Storage Gateway with VTL
    S3 Infrequent Access
  • Q4
    You have a homegrown application that you want to deploy in the cloud. The application runs on multiple EC2 instances. During the batch job process, the EC2 servers create an output file that is often used as an input file by a different EC2 server. This output file needs to be stored in a shared file system so that all the EC2 servers can access it at the same time. How do you achieve this so that your performance is not impacted?
    Use S3-infrequent access for storing the output files.
    Create an EBS volume and mount it across all the EC2 instances.
    Use Elastic File System for storing the output files.
    Use Amazon S3 for storing the output files.
  • Q5
    You have created an S3 bucket for your application and immediately receive more than 10,000 PUT requests per second. What should you do to ensure optimal performance?
    Add a random prefix to the key names.
    Use S3 infrequent access.
    There is no need to do anything; S3 will automatically handle this.
    Create each file in a separate folder.
  • Q6
    You are running a highly available application in AWS. The business needs a very performant shared file system that can be shared across EC2 servers (web servers). Which AWS service can solve this problem?
    Amazon EFS
    Amazon EBS
    Amazon S3
    Amazon EC2 instance store
  • Q7
    You are running your EC2 instance on the us-west-1 AZ. You are using an EBS volume along with the EC2 server to store the data. You need to move this instance to us-west-2. What is the best way to move all the data?
    Unmount or detach the EBS volume from us-west-1 and mount it to the new EC2 instance in us-west-2.
    Create a new volume in us-west-2 and copy everything from us-west-1 to us-west-2 using the disk copy.
    Create a snapshot of the volume in us-west-1 and create a volume from the snapshot in us-west-2 and then mount it to the EC2 server.
    Copy all the data from EBS running on us-west-1 to S3 and then create a new EBS volume in us-west-2 and restore the data from S3 into it.
  • Q8
    You are running some tests for your homegrown application. Once the testing is done, you will have a better idea of the type of server needed to host the application. Each test case runs typically for 45 minutes and can be restarted if the server goes down. What is the cost-optimized way of running these tests?
    Use an on-demand instance EC2 instance with PIOPS for running the test.
    Use a spot instance for running the test.
    Use an on-demand instance with an EBS volume for running the test.
    Use an on-demand instance with a magnetic drive for running the test.
  • Q9
    You are hosting your application on your own data center. The application is hosted in a server that is connected to a SAN, which provides the block storage. You want to back up this data to AWS, and at the same time you also would like to retain your frequently accessed data locally. Which option should you choose that can help you to back up the data in the most resilient way?
    Storage Gateway volume gateway in cache mode
    Storage Gateway file gateway
    Backing up the files directly to S3
    Storage Gateway volume gateway in stored mode
  • Q10
    You are developing a document management application, and the business has two key requirements. The application should be able to maintain multiple versions of the document, and one year the documents should be seamlessly archived. Which AWS service can serve this purpose?
  • Q11
    You are doing an audit for a company, and while doing the audit, you find that the company has kept lots of log files in a public bucket in Amazon S3. You try to delete them, but you are unable to do it. What could be the reason for this?
    The log files in the buckets are encrypted.
    Only the employee of the company can delete the object.
    The versioning is enabled in the bucket.
    You are not the owner of the bucket; that’s why you can’t delete them.
  • Q12
    You are running a workload involving large sequential I/O. You are planning to use an EBS volume for the workload. The data is infrequently accessed. You are also looking at optimizing the cost. Which EBS volume should you choose?
    Provisioned IOPS SSD (io1)
    Throughput Optimized HDD (st1)
    General Purpose SSD (gp2)
    Cold HDD (sc1)
  • Q13
    You are running your critical application on EC2 servers and using EBS volumes to store the data. The data is important to you, and you need to make sure you can recover the data if something happens to the EBS volume. What should you do to make sure you are able to recover the data all the time?
    Use an EBS volume with PIOPS.
    Take regular snapshots of the EBS volume
    Write a script that can copy the data to S3.
    Install a Kinesis agent on an EC2 server that can back up all the data to a different volume.
  • Q14
    You have an application for which you are thinking of using EC2 to host the Oracle database. The size of the database is 100GB. Since the application needs operating system access in the database tier, you can’t use RDS. The application will be used infrequently, though sometimes it will be used in the morning and during the evening. What is the most cost-effective way to design the storage layer?
    Amazon S3
    Amazon EBS General Purpose SSD
    Amazon EBS Provisioned IOPS SSD
    Amazon EBS Throughput Optimized HDD
  • Q15
    You are designing a media-streaming application, and you need to store hundreds of thousands of videos. Each video will have multiple files associated with it for storing the different resolutions (480p, 720p, 1080p, 4K, and so on). The videos need to be stored in durable storage.
    Store the main video in EBS and the different resolution files in S3.
    Store the main video in S3 and the different resolution files in S3-IA.
    Store the main video in S3 and the different resolution files in Glacier.
    Store the main video in EFS and the different resolution files in S3.

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