AWS Interview Questions, AWS Interview Questions and Answers

AWS Interview Questions and Answers, AWS Interview Questions and Answers Freshers, AWS Interview Questions and Answers, AWS Interview Questions

Before getting on to the AWS interview questions, the student must know that the AWS had is a continuously varying field which needs the students as well as professionals to upgrade their skills with the new features and knowledge, to get fit for the jobs associated. This post related to AWS Interview Questions and Answers, AWS Interview Questions and Answers Freshers, AWS Interview Questions and Answers, AWS Interview Questions will help you let out find all the solutions that are frequently asked in you upcoming AWS interview

Over thousands of vacancies available for the AWS developers, experts must be acquaintance with all the component of AWS technologies. This is necessary for the students in order to have in-depth knowledge of the subject so that they can have best employment opportunities in the future. Knowing every little detail about AWS is the best approach to solve the problems linked with the problem.

APTRON has spent hours and hours in researching about the AWS Interview Questions and Answers, AWS Interview Questions and Answers Freshers, AWS Interview Questions and Answers, AWS Interview Questions that you might encounter in your upcoming interview. This post related to AWS interview questions and answers will help you let out find all the solutions that are frequently asked in you upcoming AWS interview. All these questions will alone help you to crack the interview and make you the best among all your competitors.

First of all, let us tell you about how the AWS technology is evolving in today’s world and how demanding it is in the upcoming years. In fact, according to one study, most of the companies and businesses have moved to the AWS. Now, you cannot predict how huge the future is going to be for the people experienced in the related technologies.

Hence, if you are looking for boosting up your profile and securing your future, AWS will help you in reaching the zenith of your career. Apart from this, you would also have a lot of opportunities as a fresher.

These questions alone are omnipotent. Read and re-read the questions and their solutions to get accustomed to what you will be asked in the interview. These AWS interview questions and answers will also help you on your way to mastering the skills and will take you to the giant world where worldwide and local businesses, huge or medium, are picking up the best and quality AWS professionals.

This ultimate list of best AWS interview questions will ride you through the quick knowledge of the subject and topics like amazon cloud, Achieving Agility with EC2, Managing the EC2 infrastructure. This AWS interview questions and answers can be your next gateway to your next job as a AWS expert.

These are very Basic AWS Interview Questions and Answers for freshers and experienced both.

Q1: Compare AWS and OpenStack
A1:

Q2: What is AWS?
A2: AWS (Amazon Web Services) is a platform to provide secure cloud services, database storage, offerings to compute power, content delivery, and other services to help business level and develop.

Q3: What is the importance of buffer in Amazon Web Services?
A3: An Elastic Load Balancer ensures that the incoming traffic is distributed optimally across various AWS instances.  A buffer will synchronize different components and makes the arrangement additional elastic to a burst of load or traffic. The components are prone to work in an unstable way of receiving and processing the requests. The buffer creates the equilibrium linking various apparatus and crafts them effort at the identical rate to supply more rapid services.

Q4: What is the way to secure data for carrying in the cloud?
A4: One thing must be ensured that no one should seize the information in the cloud while data is moving from point one to another and also there should not be any leakage with the security key from several storerooms in the cloud. Segregation of information from additional companies’ information and then encrypting it by means of approved methods is one of the options.

Q5: Name the several layers of Cloud Computing.
A5: Here is the list of layers of the cloud computing

• PaaS– Platform as a Service
• IaaS– Infrastructure as a Service
• SaaS– Software as a Service

Q6: What are the components involved in Amazon Web Services?
A6: There are 4 components involved and are as below.Amazon S3: with this, one can retrieve the key information which are occupied in creating cloud structural design and amount of produced information also can be stored in this component that is the consequence of the key specified.Amazon EC2 instance: helpful to run a large distributed system on the Hadoop cluster. Automatic parallelization and job scheduling can be achieved by this component.Amazon SQS: this component acts as a mediator between different controllers. Also worn for cushioning requirements those are obtained by the manager of Amazon.Amazon SimpleDB: helps in storing the transitional position log and the errands executed by the consumers.

Q7: Distinguish between scalability and flexibility
A7: The aptitude of any scheme to enhance the tasks on hand on its present hardware resources to grip inconsistency in command is known as scalability. The capability of a scheme to augment the tasks on hand on its present and supplementary hardware property is recognized as flexibility, hence enabling the industry to convene command devoid of putting in the infrastructure at all.  AWS has several configuration management solutions for AWS scalability, flexibility, availability and management.

Q8: Name the various layers of the cloud architecture
A8: There are 5 layers and are listed below

• CC- Cluster Controller
• SC- Storage Controller
• CLC- Cloud Controller
• Walrus
• NC- Node Controller

Q9: How is stopping and terminating an instance different from each other?
A9: Starting, stopping and terminating are the three states in an EC2 instance, let’s discuss them in detail:

• Stopping and Starting an instance: When an instance is stopped, the instance performs a normal shutdown and then transitions to a stopped state. All of its Amazon EBS volumes remain attached, and you can start the instance again at a later time. You are not charged for additional instance hours while the instance is in a stopped state.
• Terminating an instance: When an instance is terminated, the instance performs a normal shutdown, then the attached Amazon EBS volumes are deleted unless the volume’s deleteOnTermination attribute is set to false. The instance itself is also deleted, and you can’t start the instance again at a later time.

Q10: How is a Spot instance different from an On-Demand instance or Reserved Instance?
A10: First of all, let’s understand that Spot Instance, On-Demand instance and Reserved Instances are all models for pricing. Moving along, spot instances provide the ability for customers to purchase compute capacity with no upfront commitment, at hourly rates usually lower than the On-Demand rate in each region. Spot instances are just like bidding, the bidding price is called Spot Price. The Spot Price fluctuates based on supply and demand for instances, but customers will never pay more than the maximum price they have specified. If the Spot Price moves higher than a customer’s maximum price, the customer’s EC2 instance will be shut down automatically. But the reverse is not true, if the Spot prices come down again, your EC2 instance will not be launched automatically, one has to do that manually.  In Spot and On demand instance, there is no commitment for the duration from the user side, however in reserved instances one has to stick to the time period that he has chosen.

Q11: How to use the processor state control feature available on the  c4.8xlarge instance?
A11:The processor state control consists of 2 states:

• The C state – Sleep state varying from c0 to c6. C6 being the deepest sleep state for a processor
• The P state – Performance state p0 being the highest and p15 being the lowest possible frequency.

Now, why the C state and P state. Processors have cores, these cores need thermal headroom to boost their performance. Now since all the cores are on the processor the temperature should be kept at an optimal state so that all the cores can perform at the highest performance.

Now how will these states help in that? If a core is put into sleep state it will reduce the overall temperature of the processor and hence other cores can perform better. Now the same can be  synchronized with other cores, so that the processor can boost as many cores it can by timely putting other cores to sleep, and thus get an overall performance boost.

Concluding, the C and P state can be customized in some EC2 instances like the c4.8xlarge instance and thus you can customize the processor according to your workload.

Q12: What kind of network performance parameters can you expect when you launch instances in cluster placement group?
A12: The network performance depends on the instance type and network performance specification, if launched in a placement group you can expect up to

• 10 Gbps in a single-flow,
• 20 Gbps in multiflow i.e full duplex
• Network traffic outside the placement group will be limited to 5 Gbps(full duplex).

Q13: Where do you think an AMI fits, when you are designing an architecture for a solution?
A13: AMIs(Amazon Machine Images) are like templates of virtual machines and an instance is derived from an AMI. AWS offers pre-baked AMIs which you can choose while you are launching an instance, some AMIs are not free, therefore can be bought from the AWS Marketplace. You can also choose to create your own custom AMI which would help you save space on AWS. For example if you don’t need a set of software on your installation, you can customize your AMI to do that. This makes it cost efficient, since you are removing the unwanted things.

Q14: What do you mean by classic link? 
A14: The Amazon virtual private cloud classic link will permit EC2 instances in the EC2 classic platform. This occurs so that it can communicate with the instances that are present in the virtual private cloud. The communication occurs with the help of private IP addresses. In order to use a classic link it is important that you enable it to for virtual private cloud in your account. Then you will need to associate a security group with an instance in the EC2 classic. This security group is from the VPC for which you enabled the classic link in your account. Each and every rule that is there for the VPC security group is applicable for the communications between the instances in EC2 classic and those instances in the VPC.

Q15: What is the process to use classic link?
A15: For the purpose of using classic link, you will need to enable minimum one virtual private cloud on your account for classic link. After doing this, you can associate a security group from that VPC to the EC2 classic instance that you would prefer. This will make sure that your EC2 classic instance is linked to VPC. It will become a member of the chosen security group in the VPC. It should be remembered that you cannot connect your EC2 classic instance to more than one virtual private cloud at the same time.

Q16: Is it possible for an EC2 classic instance to become a member of a virtual private cloud? 
A16: No, it is not possible for an EC2 classic instance to be a member of a VPC though it can become a member of the security group of virtual private cloud. The security group should be associated with the EC2 classic instance.

Q17: Is it possible for classic link settings on EC2 classic interface to persist through start or stop cycles?
A17: It is not possible for a classic link connection to persist through the start or stop cycles of the EC2 classic interface. After the EC2 classic interface is stopped it will need to be linked back to a virtual private cloud. But the classic link will persist through the instance reboot cycles.

Q18: Is it possible to have more than two network interfaces to be attached to EC2 instance?
A18: The number of network interfaces that are to be attached with an EC2 instance will depend on the type of the instance.

Q19: Can a network interface in one availability zone be attached with an instance in another availability zone?A19: The instances that are present in the same availability zone can be attached with network interfaces.

Q20: Can a network interface in one VPC be attached to an instance that is present in another VPC?A20: It is possible for the network interfaces to be attached to instances that are in the same virtual private cloud as that of the interface.

Q21: Explain what is S3?
A21: S3 stands for Simple Storage Service. You can use S3 interface to store and retrieve any amount of data, at any time and from anywhere on the web.  For S3, the payment model is “pay as you go”.

Q22: Explain what is AMI?
A22: AMI stands for Amazon Machine Image.  It’s a template that provides the information (an operating system, an application server and applications) required to launch an instance, which is a copy of the AMI running as a virtual server in the cloud.  You can launch instances from as many different AMIs as you need.

Q23: Mention what is the relation between an instance and AMI?
A23: From a single AMI, you can launch multiple types of instances.  An instance type defines the hardware of the host computer used for your instance. Each instance type provides different compute and memory capabilities.  Once you launch an instance, it looks like a traditional host, and we can interact with it as we would with any computer.

Q23: Mention what is the relation between an instance and AMI?
A24: An AMI includes the following things

• A template for the root volume for the instance
• Launch permissions decide which AWS accounts can avail the AMI to launch instances
• A block device mapping that determines the volumes to attach to the instance when it is launched

Q25: How can you send request to Amazon S3?
A25: Amazon S3 is a REST service, you can send request by using the REST API or the AWS SDK wrapper libraries that wrap the underlying Amazon S3 REST API.

Q26: How many buckets can be create in AWS by default?
A26: By default, 100 buckets can be created.

Q27: Should encryption be used for S3?
A27: Encryption should be considered for sensitive data as S3 is a proprietary technology.

Q28: What are the various AMI design options?
A28: Fully Baked AMI, JeOS (just enough operating system) AMI, and Hybrid AMI.

Q29: What is Geo Restriction in CloudFront?
A29: Geo restriction, also known as geoblocking, is used to prevent users in specific geographic locations from accessing content that you’re distributing through a CloudFront web distribution.

Q30: Explain what is T2 instances?
A30: T2 instances are designed to provide moderate baseline performance and the capability to burst to higher performance as required by workload.

Q31: What is AWS Lambda?
A31: AWS Lambda is a compute service that lets you run code in the AWS Cloud without provisioning or managing servers.

Q32: Can S3 be cast-off with EC2 instances, in case of “Yes” please specify How?
A32: Yes, it can be cast-off for instances with root approaches backed by native occurrence storage. By using Amazon S3, developers have access to the similar extremely scalable, dependable, fast, low-priced data storage substructure that Amazon uses to track its own worldwide network of web sites. In order to perform systems in the Amazon EC2 atmosphere, developers use the tools providing to load their Amazon Machine Images (AMIs) into Amazon S3 and to transfer them between Amazon S3 and Amazon EC2. Additional use case might be for websites hosted on EC2 to load their stationary content from S3.

Q33: Describe Amazon Machine Image and what is the connection between Instance and AMI?
A33: Amazon Web Services offers numerous ways to contact Amazon EC2, like web-based border, AWS Command Line Interface CLI as well as Amazon Tools for Windows Power Shell. Initially, you are required to sign up for an AWS version and you can contact Amazon EC2. Amazon EC2 offers a Query API. These requirements are HTTP or HTTPS requirements that practice the HTTP verbs GET or POST and a Query constraint called Action.

AWS Conclusion Interview FAQs

We know the list of AWS Interview Questions and Answers, AWS Interview Questions and Answers Freshers, AWS Interview Questions and Answers, AWS Interview Questions is overwhelming but the advantages of reading all the questions will maximize your potential and help you crack the interview. The surprising fact is that this AWS interview questions and answers post covers all the basic of the AWS technology and you have to check out the FAQs of different components of AWS too.

However, you will be asked with the questions in the interview related to the above mentioned questions. Preparing and understanding all the concept of AWS technology will help you strengthen the other little information around the topic.

After preparing these interview questions, we recommend you to go for a mock interview before facing the real one. You can take the help of your friend or a AWS expert to find the loop holes in your skills and knowledge. Moreover, this will also allow you in practicing and improving the communication skill which plays a vital role in getting placed and grabbing high salaries.

Remember, in the interview, the company or the business or you can say the examiner often checks your basic knowledge of the subject. If your basics is covered and strengthened, you can have the job of your dream. The industry experts understand that if the foundation of the student is already made up, it is easy for the company to educate the employ towards advance skills. If there are no basics, there is no meaning of having learnt the subject.

Therefore, it’s never too late to edge all the basics of any technology. If you think that you’ve not acquired the enough skills, you can join our upcoming batch of AWS Training in Noida. We are one of the best institute for AWS in Noida which provide advance learning in the field of AWS Course. We’ve highly qualified professionals working with us and promise top quality education to the students.

We hope that you enjoyed reading AWS Interview Questions and Answers, AWS Interview Questions and Answers Freshers, AWS Interview Questions and Answers, AWS Interview Questions and all the FAQs associated with the interview. Do not forget to revise all the AWS interview questions and answers before going for the AWS interview. In addition to this, if you’ve any doubt or query associated with AWS, you can contact us anytime. We will be happy to help you out at our earliest convenience. At last, we wish you all the best for your upcoming interview on AWS Technology.