2

Get An Idea of AWS Interview Questions in 2 minutes!

Neeraj Patel

Neeraj Patel

AWS being a popular trending cloud computing platform is the perfect technology to learn and initiate a career on the cloud. In this article I would be a briefing on some of the AWS interview questions, that would give a brief idea of the types of questions that would be asked during AWS interviews.

The interview panel would ask mainly two types of questions, one is knowledge-based where you have to remember the descriptions and use cases of services and the other is scenario-based where a virtual scenario would be given and you must either orally architect it with using different services or select best service(s).

1. What is AWS?

This would be off-course a first and foremost question that any interviewer would ask. The answer is simple. AWS is a cloud computing platform run by the multinational trading company Amazon, that provides resources as services on a metered pay-as-you-go basis to various organizations, governments, and companies to support business and various important government activities with complete reliability, security, and performance and act as virtual business infrastructure.

2. What is the need of creating subnets on AWS?

creating and using subnets can help reduce congestion by making sure that the traffic destined for a subnet stays in that subnet. This helps in efficient routing, hence reducing the network load

3. Is there a way to upload a file that is greater than 100 megabytes in Amazon S3?

Yes, by using a multipart utility from AWS. With this, larger AWS files can be uploaded in parts independently. Even these can be uploaded in parallel that would actually decrease the upload time and once they are uploaded the parts are merged into a single file to create the original file.

4. What is the importance of buffer in AWS?

It plays an important role in maintaining data traffic along with AWS ELB. They synchronize components and make arrangements compatible to face a burst of traffic. The buffer creates an equilibrium linking various apparatus and ensures that they work at an identical rate to supply more rapid services.

5. What is the max limit for creating S3 Buckets on AWS?

100

6. What is the use case difference between the application load balancer and classic load balancer?

The application load balancer is a more intelligent load balancer that is mostly used while there is a need to route the traffic to multiple services. While classic load balancer is used for simple load balancing of data traffic between multiple EC2 instances.

7. What is S3?

It is a ‘pay as you go’ simple storage service that is used to store data as objects and access at any time from anywhere on the web. It can be even used to host static websites. 

8. What is AMI?

AMI stands for Amazon Machine Image. It’s nothing but an operating system for the EC2 instance, that runs on this virtual server or instance while it’s launched. It is selected whilst launching instance and includes a template for the root volume for the instance, A block device mapping that determines the volumes to attach to the instance when it is launched, and Launch permissions decide which AWS accounts can avail the AMI to launch instances.

9. In VPC with private and public subnets, database servers should ideally be launched into which subnet?

With private and public subnets in VPC, database servers should ideally launch into private subnets.

10. What are T2 instances?

T2 instances are designed to provide moderate baseline performance and the capability to burst to higher performance as required by the workload.

11. What are the key pairs in AWS?

These are secure login information for the instances launched and contain public and private key pairs that are used to connect to EC2 instances.

12.Mention different types of instances on AWS.

  • General-purpose
  • Memory-optimized
  • Computer-optimized
  • Accelerated computing instances
  • Storage optimized

13. How many Elastic IPs are allowed to be created by AWS?

5 VPC Elastic IP addresses are allowed per AWS account.

14. What are the edge locations?

These are just like a cache that computer memory has but here these are cache locations for regions where contents are cached and when a user tries to access any content, first it will be automatically searched in here so as to increase performance and reduce the latency of the services. They are like the front end of the services. They are always situated at the nearest location of the user request.

 

15. Consider this scenario, a company ‘A’ has some private servers in its premises, also have distributed some of its the workload on the public cloud, what is this architecture called?

When a company establishes such an architecture where it has it’s own private servers and also uses public cloud services then it comprises a hybrid cloud architecture.

 

16. You have a distributed application that periodically processes large volumes of data across multiple Amazon EC2 Instances. The application is designed to recover gracefully from Amazon EC2 instance failures. You are required to accomplish this task in the most cost-effective way. Which category of instance would you use?

Spot instances are a perfect choice as they do not have long term commitments and also have low rates.

17. What is the difference between stopping and terminating an instance?

While an instance is stopped it gets shut down and the EBS volume remains attached. This instance can be again started later on. Whereas, while an instance is terminated, it is deleted permanently and even the EBS volume attached to it gets deleted if delete on termination is not set to false. This instance cannot be re-started.

18. When will you incur costs with an Elastic IP address (EIP)?

When it is allocated and associated with a stopped instance.

19. Is it possible for two EC2 instances in two different regions to communicate with each other?

Yes, through VPC peering. A VPC peering connection is a networking connection between two VPCs that enables you to route traffic between them using private IPv4 addresses or IPv6 addresses. Instances in either VPC can communicate with each other as if they are within the same network. You can create a VPC peering connection between your own VPCs, or with a VPC in another AWS account. The VPCs can be in different regions (also known as an inter-region VPC peering connection).

20. What is meant by EC2 instance metadata?

EC2 instance metadata is a service accessible from within EC2 instances, which allows querying or managing data about a given running instance.

21. Define and explain the three basic types of cloud services and the AWS products that are built based on them?

  • Computing – These include EC2, Elastic Beanstalk, Lambda, Auto-Scaling, and Lightsat.

  • Storage – These include S3, Glacier, Elastic Block Storage, Elastic File System.

  • Networking – These include VPC, Amazon CloudFront, Route53

22. What is the relation between the Availability Zone and Region?

AWS regions are separate geographical areas, for ex: US-West 1 (North California) and Asia South (Mumbai). On the other hand, availability zones are the areas that are present inside the regions. These are generally isolated zones that can replicate themselves whenever required.

23. What are the tools and techniques that you can use in AWS to identify if you are paying more than you should be?

  • Cost Explorer
  • Check The Top Services Table
  • Cost Allocation Tags
  •  AWS Budgets

 

24. What is geo-targeting in CloudFront?

Geo-Targeting is a concept where businesses can show personalized content to their audience based on their geographic location without changing the URL. This helps you create customized content for the audience of a specific geographical area, keeping their needs in the forefront.

25. What is autoscaling?

Auto-scaling is a function that allows you to provision and launch new instances whenever there is a demand.

26. How do the instances in the private subnets access the internet?

Instances in the private subnets cannot directly reach the internet hence they access it through NAT gateway that resides in the public subnet.

27. What is a DDoS attack, and what services can minimize them?

DDoS is a cyber-attack in which the perpetrator accesses a website and creates multiple sessions so that the other legitimate users cannot access the service. The native tools that can help you deny the DDoS attacks on your AWS services are:

  • AWS Shield
  • AWS WAF
  • Amazon Route53
  • Amazon CloudFront
  • ELB
  • VPC

28. Name some of the non-region specific AWS services

  • IAM
  • Route 53
  • Web Application Firewall 
  • CloudFront

29. What are the common types of AMI designs?

  • Fully Baked AMI
  • Just Enough Baked AMI (JeOS AMI)
  • Hybrid AMI

30. VPC is not resolving the server through DNS. What might be the issue, and how can you fix it?

In order to resolve this just enable the DNS hostname resolution, this will ensure the problem resolves itself.

Further preparation

Take these questions just as an introduction to various types of questions that would be asked during AWS interviews. Don’t stop here, shoot your browser to ‘AWS interview questions’ to get many more such. Interviewers can ask various possible questions on different services and scenarios hence it’s always better to stay prepared with abundant knowledge on AWS. In order to know in-depth about AWS please visit AWS Training where every service and related aspects are explained most appropriately, also if you would just type the name of a service you want to learn on your browser you would get it right there on the AWS website, Amazon has facilitated websites explaining various different aspects of all their services. 

Apart from these resources, you can access more interview questions from edureka.com, Simplilearn, intellipaat.com, toptal.com, career.guru99.com, and many more. You can go for AWS technical essentials and architecting course from Ethnus Codemithra, Amazon training partner, where resources and preparation materials are provided directly from AWS that will help a lot to prepare for AWS interviews. 

 

Happy learning!

Tags

Tags

About the Author

Neeraj Patel

Neeraj Patel

Read More

Codemithra is here to help you!

MERN Stack Website page
Enter the Captcha
Reload
AWS Certification Course
Enter the Captcha
Reload

    JaWEsome Website page
    Enter the Captcha
    Reload
    AWS Authorised Training Cloud Practitioner Essentials Website page
    Enter the Captcha
    Reload
    MERN Stack Website page
    Enter the Captcha
    Reload
    AWS Solution Architecture Associate Website page
    Enter the Captcha
    Reload
    Appian Website page
    Enter the Captcha
    Reload

    Ethnus User Agreement

    I agree to submit my personally identifiable information to Ethnus, who may use it to communicate regarding their events, courses, and other services through various media including phone calls, text messages, email, and social media. I also agree with Ethnus’ Privacy Policy and Terms of Service.

    I agree with Ethnus sharing my personal data, including email address, with Salesforce family of companies, who may contact me for sales and marketing purposes and as described in Salesforce’s Privacy Statement.

    Privacy Policy

    This Privacy Notice describes how we collect and use your personal information in relation to Ethnus websites, applications, products, services, events, and experiences that reference this Privacy Notice (together, “Ethnus Offerings”).

    This Privacy Notice does not apply to the “content” processed, stored, or hosted by our customers using Ethnus Offerings in connection with an Ethnus account. This Privacy Notice also does not apply to any products, services, websites, or content that are offered by third parties or have their own privacy notice.

    Personal Information We Collect

    We collect your personal information in the course of providing Ethnus Offerings to you.

    Here are the types of information we gather:

            a) Information You Give Us: We collect any information you provide in relation to Ethnus Offerings. Click here to see examples of information you give us. Example: Name, email, phone, etc.

            b) Automatic Information: We automatically collect certain types of information when you interact with Ethnus Offerings. Example: IP address, location, browser identity, etc.

            c) Information from Other Sources: We might collect information about you from other sources, including service providers, partners, and publicly available sources. Example: marketing analytics, keywords, etc.

    How We Use Personal Information

    We use your personal information to operate, provide, and improve Ethnus Offerings. Our purposes for using personal information include:

            a) Provide Ethnus Offerings: We may use your personal information to provide and deliver Ethnus Offerings and process transactions related to Ethnus Offerings, including registrations, subscriptions, purchases, and payments.

            b) Measure, Support, and Improve Ethnus Offerings: We use your personal information to measure use of, analyze the performance of, fix errors in, provide support for, improve, and develop Ethnus Offerings.

            c) Recommendations and Personalization: We use your personal information to recommend Ethnus Offerings that might be of interest to you, identify your preferences, and personalize your experience with Ethnus Offerings.

            d) Comply with Legal Obligations: In certain cases, we have a legal obligation to collect, use, or retain your personal information.

            e) Communicate with You: We use your personal information to communicate with you in relation to Ethnus Offerings via different channels (e.g., by phone, email, chat) and to respond to your requests.

            f) Marketing: We use your personal information to market and promote Ethnus Offerings. We might display interest-based ads for Ethnus Offerings.

            g) Purposes for Which We Seek Your Consent: We may also ask for your consent to use your personal information for a specific purpose that we communicate to you.

    Cookies

    To enable our systems to recognize your browser or device and to provide Ethnus Offerings, we use cookies.

    How We Share Personal Information

    Information about our customers is an important part of our business and we are not in the business of selling our customers’ personal information to others. We share personal information only as described below and with Ethnus Consultancy Services Private Limited, . and its affiliates that are either subject to this Privacy Notice or follow practices at least as protective as those described in this Privacy Notice.

    Transactions Involving Third Parties: We make available to you services, software, training, and content provided by third parties for use on or through Ethnus Offerings. You can tell when a third party is involved in your transactions, and we share information related to those transactions with that third party. For example, you can order services, software, and content from sellers using the Authorized Training Partner’s marketplace and we provide those sellers information to facilitate your subscription, purchases, or support.

    Other than as set out above, you will receive notice when personal information about you might be shared with third parties, and you will have an opportunity to choose not to share the information.

    How We Secure Information

            a) We protect the security of your information during transmission to or from websites, applications, products, or services by using encryption protocols and software.

            b) We maintain physical, electronic, and procedural safeguards in connection with the collection, storage, and disclosure of personal information.

    Internet Advertising and Third Parties

    Ethnus Offerings may include third-party advertising and links to other websites and applications. Third party advertising partners may collect information about you when you interact with their content, advertising, or services. For more information about third-party advertising, including interest-based ads, please read our Interest-Based Ads notice.

    Access and Choice

    You have choices about the collection and use of your personal information. Many Ethnus Offerings include settings that provide you with options as to how your information is being used. You can choose not to provide certain information, but then you might not be able to take advantage of certain Ethnus Offerings.

            a) Communications: If you do not want to receive promotional messages from us, please unsubscribe or adjust your communication preferences in the emails.

            b) Advertising: If you don’t want to see interest-based ads, please adjust your Advertising Preferences.

            c) Browser and Devices: The Help feature on most browsers and devices will tell you how to prevent your browser or device from accepting new cookies, how to have the browser notify you when you receive a new cookie, or how to disable cookies altogether.

    Children’s Personal Information

    We don’t provide Ethnus Offerings for purchase by children. If you’re under 18, you may use Ethnus Offerings only with the involvement of a parent or guardian.

    Retention of Personal Information

    We keep your personal information to enable your continued use of Ethnus Offerings, for as long as it is required in order to fulfill the relevant purposes described in this Privacy Notice, as may be required by law (including for tax and accounting purposes), or as otherwise communicated to you. How long we retain specific personal information varies depending on the purpose for its use, and we may delete your personal information in accordance with applicable law.

    Contacts, Notices, and Revisions

    If you have any concern about privacy at Ethnus, you may also contact us at the addresses below:

    Ethnus Consultancy Services Pvt Ltd,

    SST Chambers, No.151/17/1 Second Floor, 36th Cross Rd, 5th Block, Jayanagar, Bengaluru, Karnataka 560041

    Or, email us at reachus@ethnus.com

    Or call us at: +91 – 8929 334 324

    You will find the updated contact information on our website: www.ethnus.com/contact/

    If you interact with Ethnus Offerings on behalf of or through your organization, then your personal information may also be subject to your organization’s privacy practices, and you should direct privacy inquiries to your organization.

    Our business changes constantly, and our Privacy Notice may also change. You should check our website frequently to see recent changes. You can see the date on which the latest version of this Privacy Notice was posted. Unless stated otherwise, our current Privacy Notice applies to all personal information we have about you and your account. We stand behind the promises we make, however, and will never materially change our policies and practices to make them less protective of personal information collected in the past without informing affected customers and giving them a choice.

    Terms & Conditions

    This Privacy and Security Policy is provided for the benefit of customers and clients of Ethnus Consultancy Services Private Limited. (“Ethnus”) as well as other consumers and parties who use Ethnus and/or its website(s), particularly codemithra.com (“Website”, “www.codemithra.com”, “Codemithra” or “Ethnus Codemithra”), and/or applications (“Apps”) (collectively, “Ethnus Services” or “Ethnus Platform”).

    Since Ethnus serves several different audiences, customers find it helpful to read the Terms of Use that apply specifically to them based upon the purpose for which they use Ethnus. For this reason, we link to three separate agreements below for employer customers, job seeker customers, and staffing customers, respectively.

    For your convenience, we define each of these audiences that Ethnus serves as follows:

    “Employer Customer” means an entity using Ethnus Services that is seeking to hire an individual as an employee and/or independent contractor to be employed by it directly.

    “Job Seeker Customer” means an individual using Ethnus Services who is seeking to be employed as an employee or independent contractor by an employer.

    “Staffing Customer” means a staffing company using Ethnus Services that provides staffing services to their own Staffing Clients.

    So long as your use of the Ethnus website and services remains within the scope of the particular audience or customer for which you began using Ethnus (e.g. a job seeker does not use Ethnus as an employer, or an employer does not use Ethnus as a job seeker), the complete Terms of Use applicable to your use of the Ethnus website and services is contained within the applicable Terms of Use linked below.

    Employer Terms of Use

    The following Terms of Use apply to any Ethnus Employer Customer seeking to hire employees or independent contractors for its own business. If you seek to find employees or independent contractors for the benefit of your clients (and not yourself), you need to review the Terms of Use specifically for our Ethnus Staffing Customers accessible at www.Codemithra.com/terms/staffing.

    Ethnus, Inc. (“Ethnus”) provides online services through which employers and staffing companies seeking employees and independent contractors can efficiently and effectively review and interview candidates. Ethnus provides these services and its suite of features and products through its Apps and Website (collectively, “Ethnus Services”) subject to these terms of use (“Terms of Use”) and the agreements incorporated herein.

    Your privacy is very important to us. We designed our accompanying Privacy and Security Policy to provide important disclosures about how your information will be used by Ethnus in providing you Ethnus Services. These Terms of Use expressly incorporate our Privacy and Security Policy.

    Please read these Terms of Use and our Privacy and Security Policy carefully before using any of the diverse Ethnus Services. By visiting the Website, installing any of the Apps, and/or using any of the Ethnus Services, you shall have affirmed your agreement to these Terms of Use.

    1. Definitions

    2. Modifications – Will Ethnus ever modify these Terms of Use?

    3. Ethnus Services – What are the Ethnus Services?

    4. Video Content and Services – How and when do you record videos?

    5. Pricing, Payments, and Billing – How and when will I be billed for Ethnus Services?

    6. Objectionable Content – What if I find content to be objectionable?

    7. Customer Conduct

    8. Intellectual Property

    9. DMCA Policy

    10. Reserved for Future Use

    11. Resale of Services

    12. Indemnification

    13. Disclaimer of Warranties

    14. Third Party Links and Products

    15. Limitations of Liability

    16. Exclusions and Limitations

    17. General Terms

    1. Definitions

    “Consumer” means any individual or entity that uses any of the Ethnus Services. Where applicable, the term “Consumer” shall encompass all Ethnus Customers.

    “Content” means all material, whether publicly posted or privately transmitted, available on or through any of the Ethnus Services.

    “Customer” means, for purposes of this Terms of Use, You, a Job Seeker Customer.

    “Customer Content” means any Content uploaded to and/or created through the Ethnus Services by a Ethnus Customer.

    “Employer Customer” means an entity using Ethnus Services that is seeking to hire an individual as an employee and/or independent contractor to be employed by it directly.

    “GDPR” means the European Union’s General Data Protection Regulation.

    “Job Seeker Customer” means an individual using Ethnus Services who is seeking to be employed as an employee or independent contractor by an employer.

    “Profile Video” means a promotional video created by a Job Seeker Customer to promote themselves as a candidate employee and/or independent contractor. It is not an interview. The Job Seeker Customer completes this independently and on their own.

    “Software” means any necessary software used in connection with the Ethnus Services.

    “Ethnus Account” means an account associated with a Ethnus Customer who uses or has used Ethnus Services.

    “Ethnus Content” means any Content excluding Customer Content and Video Content in which Ethnus does not participate.

    “Ethnus Customer” means any person who uses or has used Ethnus Services including, but not limited to, Employer Customers, Job Seeker Customers, and Staffing Customers.

    “Ethnus Services” means the suite of features, products and services offered through Ethnus, its Apps, its App Services, the Website, and the Website Services.

    “Ethnus Trademarks” means any trademarks, tradenames, logos, and other commercial designs of Ethnus or licensed to Ethnus, whether or not formal registration exists including, but not limited to, “Ethnus.”

    “Staffing Clients” means third-party employer clients of Staffing Customers.

    “Staffing Customer” means a staffing company using Ethnus Services that provides staffing services to their own Staffing Clients.

    “Strategic Partners” means those trusted partners that Ethnus employs, engages, or retains to perform functions and/or provide services on its behalf.

    “Sub Accounts” means subsidiary accounts created for or by an Employer Customer or Staffing Customer (“such as a consultant group or employer”) under its primary account.

    “Username” means the valid email address provided by each Ethnus Customer to be used as their username or login identification.

    “Video Content” means any video content created by or associated with any Ethnus Customer accessible on and through Ethnus Services including, but not limited to, Profile Videos, Video Questions, Video Interviews, and Welcome Videos.

    “Video Interview” means an interview completed through Ethnus Services using a video or “web” camera that an Employer Customer or Staffing Customer requests a Job Seeker Customer complete. A Video Interview may involve a Job Seeker Customer alone or with other participants from an Employer Customer or Staffing Customer. A Video Interview may be pre-recorded by a Job Seeker in response to questions or occur live at which time it would be recorded.

    “Video Question” means a question recorded in video and audio that can be sent to potential employee and independent contractor candidates by an Employer Customer or Staffing Customer.

    “Website” means all of the content, information and services (in any format whatsoever) accessible through the World Wide Web at the domain name Codemithra.com.

    “Website Services” means the services provided by Ethnus through the website at the domain name Codemithra.com, hire.li, and any of our other websites that may be used from time to time