HackMD - Collaborative Markdown Knowledge Base

``` AWS Basic Interview Questions: Everything You Need to Know ``` <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"><img src="https://lh5.googleusercontent.com/mOKEsktUPYKPXt0POHMLNOB5-B1Ws9cqZyUQel0zIVh74406peWnqo7DwDlt0alsFNft01J5fJUwAu-KBL4QMo7LYkDg9zlMCOBcDm-0bRZcLqbMJX-FEwaLNyWnYLTAQhOK1gVRFES1gTiUfJ03027Y32DdBagwBi9xfet_CIdg9zTPjDAIPRzfMQ" width="523" height="225"> <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">To get hired by Amazon, you’re going to need to ace your <a href="https://thinkcloudly.com/top-50-aws-interview-questions-in-2022/" style="text-decoration:none;"><span style="font-size:11pt;font-family:Arial;color:#1155cc;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:underline;-webkit-text-decoration-skip:none;text-decoration-skip-ink:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">AWS basic interview questions</a><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">, which can be some of the most common ones asked during an Amazon Web Services (AWS) technical interview. You've come to the right place to learn everything about AWS basics. Our AWS technical interview prep will help you answer these questions easily, giving you the confidence you need to land that job at Amazon! <a href="https://thinkcloudly.com/aws-cloud-practitioner-clf-c01/" style="text-decoration:none;"><span style="font-size:11pt;font-family:Arial;color:#1155cc;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:underline;-webkit-text-decoration-skip:none;text-decoration-skip-ink:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"><img src="https://lh3.googleusercontent.com/AbmNEVlfEMr3zNbMwc8Mg_brZlkyiB5I57_0YY7c69MD9mga3IBmbfE0CwRqMljgT1r35yHFcBAgyLXCQh-XzNuoyxgXqUnnEUzgEItBGxGrl1nJp7v7UyVo4ld_EIjyOZhkK2lwn2frY_R234bZfyMghrltWFodVQ9XdnVYFUKNr-A631nmeiAHNQ" width="470" height="246"></a> <h2 dir="ltr" style="line-height:1.38;text-align: justify;margin-top:18pt;margin-bottom:6pt;"><span style="font-size:16pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Welcome to Amazon Web Services</h2> <a href="https://thinkcloudly.com/what-is-aws-amazon-web-services-aws/" style="text-decoration:none;"><span style="font-size:11pt;font-family:Arial;color:#1155cc;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:underline;-webkit-text-decoration-skip:none;text-decoration-skip-ink:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Amazon Web Services</a><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"> is the most popular website and web app infrastructure solution. AWS enables developers and organizations of all sizes to deploy applications or infrastructure on a scalable, cost-effective, and secure basis. The company offers a comprehensive suite of services from compute, storage, database, analytics, application services, deployment and management of enterprise solutions.  <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">With more than one million active customers spanning 190 countries around the world and 12 geographic regions across three continents in North America, Europe and Asia Pacific we're able to offer a vast selection of data center locations as well as an unparalleled breadth of content with more than 90 categories including books, games & apps.  <h2 dir="ltr" style="line-height:1.38;text-align: justify;margin-top:18pt;margin-bottom:6pt;"><span style="font-size:16pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Introduction (Cont'd)</h2> <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">In this blog post, we'll explore AWS interview questions that are frequently asked in interviews. We'll also provide a breakdown of each question and what you should know about it. This is the first in a series of posts on AWS interview questions. <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">What is EC2?<span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">  <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">EC2 stands for Amazon Elastic Compute Cloud, which is a web service that provides resizable compute capacity in the cloud. It allows you to run your applications without worrying about the underlying servers or hardware. AWS handles everything including your server's software, hardware, maintenance, backup, security and scalability so you can focus on doing more with less. The most important AWS interview question is What is EC2? and we have answered that above! <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">What is SnowBall?  <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Snowball helps transfer large amounts of data into AWS. For example if there was a government entity with terabytes upon terabytes of data they want to put into AWS for analysis then Snowball would be their best option as it provides them with secure handling during shipping and local storage until arrival at AWS locations where data can then be uploaded into other services like S3 and Glacier by customers with higher trust requirements.  <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">What is CloudWatch? <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Virtual Servers and Other AWS Products <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">The EC2 service is a scalable capacity computing system located in the clouds. EC2 allows you to quickly launch virtual servers, as well as other AWS products, including RDS and Elastic Transcoder. Resizing resources can be done manually or through Auto Scaling Groups. In general, EC2 instances are used for compute-heavy workloads such as batch processing of data or web serving.  <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">You can use Snowball for importing large amounts of data into <a href="https://thinkcloudly.com/hosting-a-static-website-using-amazon-s3/" style="text-decoration:none;"><span style="font-size:11pt;font-family:Arial;color:#1155cc;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:underline;-webkit-text-decoration-skip:none;text-decoration-skip-ink:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Amazon S3</a><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"> quickly and cost-effectively by shipping it via FedEx on your behalf. CloudWatch is a monitoring service designed to help you collect and manage metrics across multiple AWS resources - such as queries per minute (QPM) - and better understand the behavior of your applications. <h2 dir="ltr" style="line-height:1.38;text-align: justify;margin-top:18pt;margin-bottom:6pt;"><span style="font-size:16pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Security Features</h2> <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"> 1. Security Key Pair provides a unique private key that is encrypted with a passphrase and grants access to AWS services.  <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"> 2. AWS Identity and Access Management (IAM) secures users’ credentials, which are used for authentication for various AWS services and resources. <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">  3. All data transfers between the customer’s on-premises environment and the cloud are     encrypted by default using Transport Layer Security (TLS). <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">  4. Customers can use <a href="https://thinkcloudly.com/virtual-private-cloud-vpc-and-aws-subnet/" style="text-decoration:none;"><span style="font-size:11pt;font-family:Arial;color:#1155cc;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:underline;-webkit-text-decoration-skip:none;text-decoration-skip-ink:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Virtual Private Cloud</a><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"> (VPC) Subnet Groups that limit traffic on their subnets to only instances in their VPC, which helps improve security by limiting the exposure of those instances within the VPC itself.  <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"> 5. Amazon GuardDuty is an AWS service that automates threat detection by continuously scanning all EC2 computers and <a href="https://thinkcloudly.com/how-to-create-an-ebs-volume/" style="text-decoration:none;"><span style="font-size:11pt;font-family:Arial;color:#1155cc;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:underline;-webkit-text-decoration-skip:none;text-decoration-skip-ink:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Amazon EBS volumes</a><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"> for malicious activity.  <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"> 6. Amazon Macie analyzes customer content stored on S3 or other Amazon Web Services and detects sensitive information like personally identifiable information, credit card numbers, social security numbers, etc., and alerts the customers when it finds matches.  <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"> 7. Amazon Inspector audits configuration files of installed software packages against known vulnerabilities so customers can take appropriate action before hackers find those vulnerabilities as well.  <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"> 8. AWS Trusted Advisor offers advice on ways to manage costs with smart recommendations such as changing instance type or choosing from alternative regions across various AWS offerings including EC2, S3, RDS, Redshift etc., based on usage patterns over time <h2 dir="ltr" style="line-height:1.38;text-align: justify;margin-top:18pt;margin-bottom:6pt;"><span style="font-size:16pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">How To Setup An EC2 Instance On Amazon Web Services</h2> <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">The first step is to launch an EC2 instance. This can be done by going to the Amazon Web Services EC2 dashboard and clicking Launch Instance in the top left hand corner. Here, you will specify your instance type, for example t1.micro. You will also need to name your instance and select a region. Once this is done, you can click Review and Launch on the bottom right of the page.  <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Then you will provide your root password which is used to log into your AWS account. Finally, choose Create New Security Group from the list of choices on the next page and then add any rules that are necessary. For security reasons, it's best not to have any rules applied at all so that it can't be accessed from outside sources. However, if it does need to connect with other resources outside AWS (such as through SSH or RDP), you'll want to add those connections here as well so that they're permitted access. <h2 dir="ltr" style="line-height:1.38;text-align: justify;margin-top:18pt;margin-bottom:6pt;"><span style="font-size:16pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Final Thought</h2> <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">One of the most common interview questions in AWS is about what is EC2? EC2 stands for Elastic Compute Cloud and it's a web service that provides resizable compute capacity in the cloud. The prices are typically on a per hour basis, but you can also get discounts for using it longer. If you want to learn more about the different types of pricing options, then take a look at Amazon's webpage. <span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">All the other AWS services are important as well, so don't forget that there are many other things besides EC2. For example, with Snowball you can move large amounts of data into AWS by securely transporting it on hard drives and shipping them to AWS. ``` ```