AWS Interview Questions and Answers 2021

By Aradhya Kumar

Last updated on Sep 20 2021

AWS Interview Questions and Answers 2021

Most Frequently Asked AWS Interview Questions in 2021 (with Answers)


When you look for most sorted IT jobs, then you can definitely look up to the AWS certification. The Gartner placed in the Amazon web services is reportedly placed as the leader’s quadrant. In Forbes also you can find there is a tremendous demand for AWS certification. The AWS certification is leading up to 15 top-paying jobs in the IT industry. Here we are helping you to upgrade your career in all those industries requirements. Here we have curated the best interview questions and answers segment. In this article, you will get to know about the AWS interview questions that will help you to understand the interview format better. 


AWS is known for its architect solutions, which always help them in designing the AWS cloud architecture for the existing systems and help them in migrating to the developed technical road maps. You can implement them in better future AWS cloud implementation. So, through this AWS interview questions, you will get to know the top questions and answers that you need to know.


Firstly we will start with the basic interview question section. Then we can move forward to the AWS interview questions which may sound technical challenging to the candidates.


Basic AWS Interview Questions and Answers


What do you mean by cloud computing?

Cloud computing is one of the major discussion topics. For this, you need to explore more of cloud computing page. Here we will give you some basic differences like in AWS it is situated in 2006 whereas Azure is initiated by 2010. The market share of AWS id 4x where for Azure it is x. The AWS is implemented by the fewer options where the Azure gets the more experiment material possible. 

The AWS gets the widest range of options, whereas the Azure gets a good range of options. You can say Azure is good than AWS. The AWS offer the market a good market hold, whereas, in Azure, the market gets a better offering than AWS.

Coming to the next AWS interview questions, try to get some answers from the following.


When you distribute your workload in the private sectors, what architecture do you call them?

  1. A) Virtual private network
  2. B) Private cloud
  3. C) Virtual private cloud
  4. D) Hybrid cloud

The answer to this question is (d). The hybrid cloud can be used for the following architecture. This is happing because you are fully utilizing the public as well as private cloud premises. 


What does the following command do for respect with Amazon EC2 security groups?

It helps in creating a new security group that is easy to use for your account. 

This means, as you know, a security group is just like a farewell, where the security controls the traffic in and out of the instances. When we talk in terms of AWS, we call it inbound and outbound traffic. When you get success in creating any security group, then you can add a lot of different rules to it. In this way, you can satisfy the answers.


How do you differentiate of terminating and stopping an instance from each other?

When you are in EC2 instance, you must know there are three states; they are starting, stopping and terminating. Knowing in detail, the stopping and starting in the instance is done when we require specific targets. When the instances get stopped, then you get the normal shutdown, and all the transition gets stopped. You can get all the Amazon EBS volume in the instance and again at the later times.

You do not get any additional instances hours for the stopped time. When you terminate the instance, then you get the instance getting normal shut down. At those instances, you get Amazon EBS volumes also get deleted. Thee instance in itself is also get deleted, and there is no chance of getting that instance one again.


If we were to start the instance, then how do we run it in single-tenant hardware, which value do I need to set the instance attribute to?

By dedication instance, you can get the instance tenancy attributes. The rest of the values of the attributes are invalid.


When shall you incur all the costs with an Elastic IP address?

The answer to this AWS interview questions is, if you are allocated and get associated with the stopped instances, then you can incur the costs. In this case, you do not get any charge, but that can only happen if the elastic IP address is attached to it. But you have to remember that you can get charged from other following factors like when you go for using more than one elastic IPs within your instances. You can also get charged when you get the elastic IP getting attached to the stopped instance and when you get the elastic IP is not even attached with any instances.


How can you spot the instant difference between on-demand instance and reserved instances?

 You must know the spot instance, demand instance and reserve instance are all the models of pricing. Knowing more about it, you should know, the spot instances have the ability to provide the customer with compute capacity that comes with no upfront commitment. This work usually at lower rates than the on-demand rate at each region. Coming to the spot instance, they are just like bidding. The spot price is also usually known as bidding price. The spot price gets influenced by the supply and in demand. But you have to note one strong point that, the customer is ever going to pay more than the maximum price that they get specified with.

If in case, the spot price gets increased more than the customer’s maximum price then are a lot of chances that the customer’s EC2 will be getting automatically shut down. But in the reverse case, this does not happen. If the spot price is coming down, then you get the EC2 instances not getting launched automatically. You have to do one attributes manually. You get no commitment in spot and on-demand instance. You get no duration from both the users. But in reserved instances, you need to stick to one instance for the time period it has chosen.


Do you think the reserved instances are available for the Multi-AZ deployments?

Yes, absolutely the multi A-Z deployments are available for all the instances. It is more on the pricing model and is available in all instances.

Coming to the next AWS interview questions, which will help you in knowing more about the interview questions and answers. Through this, you can enhance your knowledge of the basic topics of the interview. So let’s check out more.


How can you use the processor state control features which are available on the c4.8x large instance?

There is a total of two processors that are used for the control features. The first one is of C state, which helps in varying the state from c0 to c6. The biggest sleep state for a processor is c6. Another state of the processor is the P stage. In this P stage, you get the performance state from the p0 to p15. P0 being the highest and p15 being the lowest possible frequency. Now the questions are why you choose the C state and P state.

All the processors have cores. Each core needs thermal headroom, which helps in boosting their own performances. As all the cores need to be in the processor and the temperature keeps in rising, it’s very important to keep the temperature in an optimal state. It helps the cores in performing with more accuracy for giving the highest performances. 


Next questions that can come into our mind that, how will these states help in that. When you put the cores in a sleep state, then it will definitely help in performing better. It will help in putting the overall temperature in a normal state. Now you can sync this with the other cores. This will help in boosting the work performances in better space. You can timely put the cores at sleep mode, which will help in getting you overall good performances. You can conclude the C and P state in a customised state also in EC2instances. This will help in customizing the processor from many hard workloads.


What kinds of network performances do you expect from the launch instances in cluster placement groups?

All our network performance meagrely depends upon the instance types and network performances. It is the core of the specified type. When it gets launched in a placement group you can expect like 10 Gbps in a single –flow; you can also get the 20 Gpbs in multi-flow, i.e. full-duplex. Along with these, you also get the benefits of network traffic outside the placement group. This will be limited up to 5 Gbps.


For deploying a node cluster in Hadoop in AWS, what kind of instance can we use?

Before knowing more about the answer, you must know about Hadoop cluster. You must know that the Hadoop cluster follows the master-slave concept. The master processes are the one that processes all the data. It also looks after slave machines and works for all the slave machines, which helps in storing the data and helps in acting as the data nodes. All the storage happens at the slave, so you must need a higher capacity of the hard disk. This will help in recommending and mastering more of the processing.

For doing the processing in the slaves, you need high RAM storage, and you also need better CPU control. For the processing, you can choose the higher configuration method depending on your computer workload. You can also use the installation of the Hadoop cluster, which can manually; through this, you can manually help in launching the Amazon EMR instances. This helps in configuration automatically. If whenever you dump your data in the S3, the EMR will pick it up for you. It will help in processing and then dumps it in S3.


Where do you think you can find the AMI fits?

AMI means Amazon machine images. It is basically designed to template the virtual machines and keeping an instance to the AMI. AWS primarily offer the pre-baked AMIs, which plays a great role in launching the instance. There is some AMIs which you cannot get in free of cost. In that case, you have to bring it from the market place. You also get the privilege of designing your own customs. The AMIs is going to play the role of saving your custom made space. If you hesitate for creating your own set of software, then you can customize your own AMI. In this process, you get more cost-effective things, and you get the chance of removing the unwanted and wasted things.

In the section of AWS interview questions, you must get the clear idea of optimizing the answers, so that the interviewer can guess you level, and can test you according to that. This will definitely give you more importance and value than other candidates. Moving to the next AWS interview questions.


Advanced AWS Interview Questions and Answers


Do you think one elastic IP address is enough for all instances of running?

The answer can vary. It depends on the situation. All the instances do come with a private and public address. You must note the fact that the private address is mostly associated with the instance and it primarily returns to the Amazon EC2. This process only happen, when you get the program stopped or terminated. With the same order the public address are associated with the instances which are merely happen when it is stooped or terminated. It more often stays as long as the user does not give the manually in hand. But in case you are going to host the multiple websites, then you have to go for more elastic IP address.


What best practises do you follow for good security in Amazon EC2?

You can find a great deal of practices to secure the EC2. Some of the facilities of the EC2 are using of AWS identity for accessing management. It s also used to control the access for the AWS resources. It also look for restrict access that help in trusted hosts or networks. It helps in assessing more ports in your instances. The security also looks for reviewing of rules in security groups regularly. As in privilege you get the permission only to open up the requirement of yours. You also get an advantage of disabling your password which is based on your login instances. It password must be launched from your AMI. 


How can you look for S3? How does it used for EC2 instances.

Yes definitely, you can go for the instances. You can look up for the devices and then you need to back by the local instances. When you go for using Amazon S3, you must know that, the developers have great access to your data storage. They are fast, reliable, inexpensive and come with high scalable data storage infrastructure. Amazon uses this infrastructure and runs the global network of the web sites. There are lots of developers who get to use the executive environment provided by the Amazon. They usually look into the tools from the Amazon machine images. So most oft they get moved in between Amazon S3 and Amazon EC2.


How do you think of speeding the data transfer in snow ball?

You get lots of ways through which you can increase the speed of snowball. You can go for performing a multiple copy that comes with operations of one time only. You must see that the work station must be strong enough so that you can initiate multiple commands from different terminals and can come from snowball device. You can also look for copying multiple work station and can come for the snowball device. There are other ways like transferring large files or copying the large files by creating small batches of files. This will help in reducing the encryption overhead.

The last way through which you can speed the data transfer in a snowball is eliminating the unnecessary files. This means you can makes different set up of the source machines and you can go for the snow ball. Snow ball are known to be the active machines that goes over switching and comes with great improvement of performances.

Coming to another section of the AWS interview questions section which is AWS VPC.


How can you connect the corporate data centre into the Amazon cloud?

Yes definitely, you can go for establishing your corporate data centre in the Amazon cloud. For that you need to install the VPN, which is known as virtual private network. This is a connection where you get the relationship between the VPC and VPN. This connection helps in allowing your instances from the EC2 as they exist within the network.


Does it even possible to change the private IP address?

When you are running the EC2 the primary private IP address is needed to get attached with the instances. It comes through all the lifetime and that can be never changed. however if you look for the secondary private address than you can definitely get unassigned. You can also get assigned or moved between the interfaces at some point of time.


Another interesting AWS interview questions is,


Why do you go for making the subnets?

The answer to these questions is to efficiently utilize networks which have given large number of hosts. You can assume that there are many networks that come with many large no of hosts. It helps in managing the hosts for giving a tremendous job. For easy access he network gets divided into subnets. These will help in managing the hosts and getting it into a very simpler form.


Can you use Amazon cloud front, in directing the transfer objects?

Definitely it’s a yes. The Amazon cloud front will help you in supporting through the customs origins. This may include the origin that can come from outside of AWS. 

When you come in contact with the direct AWS, then you will be getting charged for the respective data that is needed for transfer.


When your AWS direct data connection fails, do you will lose all your connectivity?

When you are doing a data connection, always look for the backup. If the backup AWS direct connect is been configured, then all the required and on process event will be switched directly into the second one. It is always advisable that you must look for Bidirectional forwarding detection. This will help in configuring the connection that will help in ensuring a greater and faster detection and fail over. In other cases you can look at the configuration back up from the IP sec VPN where all the connections will be fall directly into the VPN connection automatically.

The Amazon S3 can be directed easily from the traffic and can be joining the routed internet. If in case, you do not have any back up AWS direction connect link, then the VPS traffic will drop all the events in failure box.

What are the differences in between Amazon RDS, Dynamo DB and Redshirt?

With an interesting section of the AWS interview questions; you can give this answer with very ease. You can clear the interview scene with your level up skills and knowledge.

Amazon RBD is used for database management. This helps in services that come for the relational database. It helps in managing the patching and upgrading the data and backing up the data and many more. It can get all the services without any intervention. The DB gets the RBD as a management services that helps in structuring the data only.

The DynamoDB on other side helps in creating NoSQL data. It helps in serving those data base and deals with the instructed data. Coming to the Redshift, it can be called as the entire different service that comes with a data warehouse product. You can also use that in data analysis.


So here we have collected some of the popular AWS interview questions and answered them to help you. We’re certain these will prove to be the best interview question and answers that can help you in clearing interviews. These will also provide basic ideas about the types of question that are asked in the interview. Good luck!


If you are aspiring to make a career or enhance your current career in the field of cloud computing, you can take up our AWS Training and get certified. To know more about AWS courses, you can reach us at Click Here or directly chat with our course expert online.


To explore courses from various other fields, visit Sprintzeal's all courses page


AWS (Amazon Web Services) Certifications you must consider


AWS Solution Architect Certification

AWS Developer Associate Certification

AWS SysOps Associate Certification

About the Author

Sprintzeal   Aradhya Kumar

With years of experience and a vast amount of knowledge in Project Management, Agile Management, Scrum, and other popular domains, Aradhya Kumar is well-versed in creating content for audiences from various fields and industries.

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