AWS Interview Questions: During the job interview, when an applicant is able to answer the AWS interview questions descriptively, his or her fate gets decided immediately. Answering effectively to AWS, interview questions develop scope for various opportunities for a successful interview endeavor. This article is contains AWS interview questionnaire. The article has been developed by Aptron's AWS specialists, AWS experts, and AWS trainers who have put sincere efforts and best of knowledge while preparing AWS interview questions and answers for freshers, and experience applicants. The questionnaire comprises of detailed answers casing basic and advanced AWS interview questions. The questionnaire assists job aspirants to crack interviews and acknowledge relevant answers to their doubts or puzzlements. The AWS Interview Questions is a summarization of verticals available in the AWS technology.
Amazon Web Services (AWS) is a secure cloud services platform, delivering compute power, database storage, content delivery and other practicality to assist individuals, organizations, and governments, on a metered pay-as-you-go basis. In easy words, AWS (Amazon Web Services) authorize users to run web and application servers in the cloud to host dynamic websites. AWS securely stores all files on the cloud so that users can access it from anywhere. It uses managed databases such as MySQL, PostgreSQL, Oracle or SQL Server to store information and delivers static and dynamic files quickly around the world using a Content Delivery Network (CDN). AWS is also used for sending bulk email to your customers.
AWS Interview Questions And Answers
1. Explain what AWS is?
AWS stands for Amazon Web Service; it is a collection of remote computing services also known as a cloud computing platform. This new realm of cloud computing is also known as IaaS or Infrastructure as a Service.
2. Mention what the key components of AWS are?
The key components of AWS are
Route 53: A DNS web service
Simple E-mail Service: It allows sending e-mail using RESTFUL API call or via regular SMTP
Identity and Access Management: It provides enhanced security and identity management for your AWS account
Simple Storage Device or (S3): It is a storage device and the most widely used AWS service
Elastic Compute Cloud (EC2): It provides on-demand computing resources for hosting applications. It is handy in case of unpredictable workloads
Elastic Block Store (EBS): It offers persistent storage volumes that attach to EC2 to allow you to persist data past the lifespan of a single Amazon EC2 instance
CloudWatch: To monitor AWS resources, It allows administrators to view and collect key Also, one can set a notification alarm in case of trouble.
3. Explain what S3 is?
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.”
4. What is AMI?
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.
5. Mention what the relationship between an instance and AMI is?
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 computer 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.
6. What does an AMI include?
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
7. How can you send a request to Amazon S3?
Amazon S3 is a REST service, and you can send a request by using the REST API or the AWS SDK wrapper libraries that wrap the underlying Amazon S3 REST API.
8. How many buckets can you create in AWS by default?
By default, you can create up to 100 buckets in each of your AWS accounts.
9. Explain can you vertically scale an Amazon instance? How?
Yes, you can vertically scale on Amazon instance. For that
Spin up a new larger instance than the one you are currently running
Pause that instance and detach the root webs volume from the server and discard
Then stop your live instance and detach its root volume
Note the unique device ID and attach that root volume to your new server
And start it again
10. Explain what T2 instances is?
T2 instances are designed to provide moderate baseline performance and the capability to burst to higher performance as required by the workload.
11. 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.
12. Your organization has decided to have all their workload on the public cloud. But, due to certain security concerns, your organization decides to distribute some of the workload on private servers. You are asked to suggest a cloud architecture for your organization. What will be your suggestion?
A hybrid cloud. The hybrid cloud architecture is where an organization can use the public cloud for shared resources and the private cloud for its confidential workloads.
13. The data on the root volumes of store-backed and EBS-backed instances get deleted by default when they are terminated. If you want to prevent that from happening, which instance would you use?
EBS-backed instances. EBS-backed instances use EBS volume as their root volume. EBS volume consists of virtual drives that can be easily backed up and duplicated by snapshots. The biggest advantage of EBS-backed volumes is that the data can be configured to be stored for later retrieval even if the virtual machine or the instances are shut down.
14. Which one of the storage solutions offered by AWS would you use if you need extremely low pricing and data archiving?
Amazon Glacier. AWS Glacier is an extremely low-cost storage service offered by Amazon that is used for data archiving and backup purposes. The longer you store data in Glacier, the lesser it will cost you.
15. Which Amazon solution will you use if you want to accelerate moving petabytes of data in and out of AWS, using storage devices that are designed to be secure for data transfer?
Amazon Snowball. AWS Snowball is the data transport solution for large amounts of data that need to be moved into and out of AWS using physical storage devices.
16. If you are running your DB instance as Multi-AZ deployment, can you use standby DB instances along with your primary DB instance?
No, the standby DB instance cannot be used along with the primary DB instances since the standby DB instances are supposed to be used only if the primary instance goes down.
17. How is stopping and terminating an instance different from each other?
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.
18. When will you incur costs with an Elastic IP address (EIP)?
When an EIP is allocated.
When it is allocated and associated with a running instance.
When it is allocated and associated with a stopped instance.
Costs are incurred regardless of whether the EIP is associated with a running instance.
19. What kind of network performance parameters can you expect when you launch instances in cluster placement group?
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).
20. What is CloudFront?
CloudFront is a content delivery network offered by AWS, and it speeds up the distribution of dynamic and static web content such as .css, .js, .html and image files to the users. It delivers the content with low latency and high transfer speed to the users. AWS provides CDN for less price and it suits best for startups.
21. What is VPC?
Virtual Private Cloud (VPC) allows you to launch AWS resources into the virtual network. It allows users to create and customize network configurations according to users’ business requirements.
22. What are NAT gateways?
Network Address Translation (NAT) allows instances to connect in a private subnet with the internet and other AWS services. NAT prevents the internet to have an initial connection with the instances.
23. What is SQS?
Amazon SQS stands for Simple Queue Service, and it manages the message queue service. Using this service, you can move the data or message from one application to another even though it is not in the running or active state. SQS sends messages between multiple services, including S3, DynamoDB, EC2 Instance, and also it uses the Java message queue service to delivery the information. The maximum visibility timeout of a message is 12 hours in the SQS queue.
24. Explain about DynamoDB?
If you want to have a faster and flexible NoSQL database, then the right thing available is DynamoDB, which is a flexible and efficient database model available in Amazon web services.
25. What is Glacier?
Amazon Glacier is one of the most important services provided by AWS. The Glacier is an online web storage service that provides you with low cost and effective storage with security features for archival and data backup. With Glacier, you can store the information effectively for months, years, or even decades.
26. What is Redshift?
Redshift is a big data product used as a data warehouse in the cloud. It is the fast, reliable and powerful product of big data warehouse.
27. What is Server Load Balancing?
A Server load balancer (SLB) provides content delivery and networking services using load balancing algorithms. SLB distributes the network traffic equally across a group of servers to ensure high-performance application delivery.
28. What are the reserved instances?
It is nothing but a reservation of resources for one or three years and utilized whenever you need. The reservation comes on a subscription basis available for a term of 1 year and three years. The hourly rate goes down as the usage increases. Purchasing reservation isn’t just associated with the reservation of resources, but also, it comes with the capacity that is required for a particular zone.
29. What is meant by Edge location?
The actual content is cached at the places called edge locations. So whenever a user searches for the content, he will find the same at the edge locations.
30. Explain about AWS Lambda.
AWS Lambda is a computational service that enables you to run code without maintaining any servers. It automatically executes the code whenever needed. You are required to pay for the time that you have used it for. Lambda enables you to run the code virtually for any kind of application without managing any servers.
Career scopes and salary scale
The average being without a job is rising across job markets. But, when it is concerning software development and software programming, the requirement of AWS professionals are at higher side. AWS candidates having in-depth knowledge and skill-based training in AWS are able discover their smooth ways to attain their career goals. Besides, AWS has occupied the topmost place in the arena of cloud services. An AWS candidate is expected a minimum salary of 35, 000 dollars per annum. Although the salary of an experienced AWS expert can reach to double the figure mentioned before. The salaries are very reliant upon the location, business, and the company’s requirements.
The article ‘AWS interview questions’ has been productively answered every advanced AWS interview questions. As well, the considerate planned of the AWS interview questions for experienced is being designed by our trainers and team of experts. They have tried their top of knowledge to aid professionals in getting answers to all doubts and not clear concepts. Even then, if learners still necessitate more detailing about AWS, then they may drop in a message to our experts regarding AWS interview questions for experienced professionals. Our trainers would be happy to assist and resolve all your AWS-programming issues of the students.
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