With the AWS interview coming up next week, it is important to ensure you are well-prepared for the interview process. You should familiarise yourself with the types of questions typically asked during an AWS interview, such as questions related to cloud computing, AWS services, and general technical concepts. Additionally, it is beneficial to have an understanding of the core concepts of AWS, such as its purpose, services, and benefits. When asked about AWS during an interview, one can describe it as an Amazon Web Services cloud computing platform that provides a range of services, from storage solutions to compute power, to allow businesses to scale quickly and cost-effectively.
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So, what exactly is AWS?
Amazon Web Services (AWS), a division of Amazon.com, provides a comprehensive cloud-computing platform for businesses, consumers, and government agencies. Customers may purchase access to AWS’s cloud computing services and application programming interfaces (APIs). AWS integrates Infrastructure-as-a-Service (IaaS), Platform-as-a-Service (PaaS), and Software-as-a-Service (SaaS) offerings into a unified cloud computing platform.
Preparing for an AWS interview: the basics
Explain the function of the AWS term “buffer.”An Elastic Load Balancer (ELB) assists Amazon Web Services (AWS) in more effectively distributing incoming network traffic across multiple instances. By maintaining synchronisation between several moving elements, an ELB provides a buffer that makes the system more resilient to rapid spikes in traffic or load.
Due to their unpredictable responses to requests, these components can be difficult to manage. The buffer helps to even out the process by allowing the various pieces of equipment utilised in service delivery to operate at the same rate.
The reason why programmers create subnets.Subnets are used to partition a big network into more manageable segments.
There are numerous rationales for creating these distinct networks. For instance, congestion can be relieved by utilising subnets to restrict traffic to a particular region. This lessens the load on the network and enhances the effectiveness of incoming traffic routing.
Explain the concept of an elastic transcoder.Amazon Web Services‘ Elastic Transcoder is a powerful tool designed to help developers easily adjust the format and quality of a video, enabling it to be viewed on a variety of devices. This tool provides a convenient way to ensure the highest quality output and compatibility, making it an ideal choice for anyone looking to make their video content accessible to the largest possible audience.
Can you explain what VPC, or Virtual Private Cloud, is?A Virtual Private Cloud (VPC) gives programmers the ability to create a customised network infrastructure. A VPC network functions as a virtual firewall, effectively isolating it from other cloud networks. Developers can have their own subnets, security groups, and IP address ranges when utilising a VPC, giving them greater control over their network environment.
Which category of Cloud Service includes DNS and Load Balancing Services?IaaS-Storage Cloud Service includes Domain Name System and Load Balancer.
Explain EC2.Elastic Compute Cloud (EC2) is a virtual computer hosted in the cloud that developers can manage at the operating system level. EC2 provides a convenient option for programmers who require a cloud server to be available on-demand. Additionally, developers who wish to have control over the hardware selection and software updates for the device, or those who need to replicate the on-premises server experience in the cloud, can also benefit from the use of EC2.
The SnowBall is what?The SnowBall tool allows developers to easily transfer large amounts of data in and out of the AWS cloud.
Sample questions and answers for an intermediate level AWS interview
S3 in AWS: what is it?Amazon’s Simple Storage Service (S3) provides programmers with the ability to securely store and access any number of files from any location around the world via the World Wide Web. This convenient service is offered on a pay-as-you-go basis, making it a cost-effective solution for any project.
When using Amazon S3, how do you initiate a request?Amazon S3 is a REST service that may be used by programmers using the REST API or the AWS Software Development Kit (SDK) wrapper libraries.
How are AWS Availability Regions and Availability Zones related to one another?The Amazon Web Services (AWS) Regions span a vast geographical area. In comparison, AWS Availability Zones are distinct sections located within a specific Region. Furthermore, it is not anticipated that any malfunctions in one Availability Zone will have an adverse effect on the performance of any other Availability Zones in the vicinity.
Why is AWS IAM beneficial?By leveraging Amazon Web Services (AWS) Identity and Access Management (IAM), a system administrator can implement fine-grained access control to individual users and groups. This enables them to customise the level of access given to different user groups and individuals based on the purpose they need it for.
Defend the Name Security Group.A security group is a virtual firewall built on rules that developers use to control which users have access to which instances.
When creating an Amazon Web Services (AWS) instance, developers may have the option of making it accessible to the public network. However, in certain situations, they may prefer to limit access to the instance to a select group of networks. In such cases, developers often enlist the services of security companies to ensure that their instance is sufficiently protected.
Can you explain the distinction between Spot and On-Demand instances?When launching Amazon Web Services (AWS) Elastic Compute Cloud (EC2) instances, not all of the available processing power and computational capabilities are fully utilised. An alternative option is to utilise Spot Instances, which can be launched whenever available resources become available. This may be suitable for application developers who are willing and able to be flexible with their application’s uptime.
Rather than relying on a pre-determined number of instances, it is possible to create instances as needed. This approach offers a consistent pricing model and the assurance that these instances will remain active until manually shut down by the developers.
What exactly is draining a connection?Connection Draining is an advantageous feature available through Amazon Web Services (AWS) which provides a measure of resilience to the system. It allows servers, which are being upgraded or taken out of service, to continue responding to requests until they have been fully disconnected. This enables a smooth transition of services without causing the disruption of requests, and helps to ensure an uninterrupted level of service to users.
Enabling Connection Draining allows the load balancer to pause sending requests to an outgoing instance, giving it time to finish any current requests before it is taken offline. If Connection Draining is not enabled, the instance is shut down immediately without completing any pending requests, resulting in them failing.
Questions and Answers for an Advanced Level AWS Interview
If your file is larger than 100 MB, how will you submit it to Amazon S3?The AWS Multipart Upload Utility allows developers to upload files larger than 100 MB.
The Multipart Upload Utility facilitates the submission of large files which have been separated into multiple components. To further enhance the upload process, developers may opt to transfer a number of parts simultaneously. Upon completion of the upload and reassembly of the parts, a single file is generated which accurately reflects the original from which the parts were cut.
Can the Private IP Address of an active or halted EC2 instance be changed?The private IP address of an EC2 instance cannot be changed.
A unique IP address is assigned to each EC2 instance the minute it boots. This instance has a fixed, unchangeable private IP address.
Which scaling method do you think is most suited for RDS, and why?It is possible to adjust the size of anything either in the horizontal or vertical direction, or up or down. Vertical scaling allows for the convenient growth of the primary database in order to cater to a larger number of users.
The Remote Database Service (RDS) can be altered in eighteen distinct ways, with the flexibility to either shrink or expand the service. In contrast, databases can only be increased in size through vertical scaling. Although, horizontal scaling is more beneficial when it comes to replicating the data, Amazon Aurora is the only technology that makes this process possible as the copies are read-only.
What exactly does “Power User Access” mean in AWS?The individual responsible for managing the Amazon Web Services (AWS) resources will serve in a capacity similar to that of a superuser. They will be endowed with the capacity to create, delete, modify, and inspect AWS resources, as well as the ability to allow access to other users.
Power User Access provides users with administrative capabilities without the authorization to manage other users’ accounts. Power users are able to add, remove, modify, and inspect resources, however they cannot bestow access to any other user.
To differentiate between an Instance Store Volume and an EBS Volume, what do these terms mean?It is essential to ensure that the temporary data associated with an instance is stored in a designated Instance Store Volume. This volume can be accessed while the instance is running, but as soon as the instance is terminated, the Instance Store Volume is removed and any data it contains is permanently lost. Therefore, it is important to ensure that any necessary data is backed up prior to terminating the instance.
Contrary to a regular instance, an Amazon Elastic Block Store (EBS) Volume is a persistent storage device that can store data and information indefinitely, even after the instance it is attached to is terminated. Therefore, the information stored on an EBS Volume will remain available.
When combining CloudTrail and Route 53, how do they interact with one another?Amazon CloudTrail provides a comprehensive audit trail of every API call made to the Amazon Route 53 service from any AWS account, including those made by IAM users. Upon each request, CloudTrail automatically stores a log file to an Amazon S3 bucket, capturing the details of each request. By using CloudTrail, organisations are able to track and monitor changes made to their Route 53 domains, ensuring that all requests are logged and can be traced back to the source.
By analysing the CloudTrail log files, you can gain additional insight into the requests made to Amazon Route 53. This includes the IP addresses that the requests originated from, the identities of the individuals who submitted them, the times they were sent, and further details that may be useful to your organisation.
Amazon Web Services (AWS) Key-Pairs: What Are They?The Key-Pairs are the user’s confidential credentials used to authenticate their identity while establishing a secure network connection with Amazon EC2 instances. These credentials are protected by a secret password which the user must provide in order to gain access to the Virtual Machines.
Last but not least
If you are aspiring to become an Amazon Web Services (AWS) Developer, it is essential to have an in-depth knowledge of AWS in order to compete in the highly competitive cloud computing industry. To ensure that you are well-prepared for your upcoming AWS job interview, here are some of the most common AWS interview questions that can help you to be fully equipped for the interview.
It is important to ensure that you are adequately prepared for the application process, as many organisations often receive an abundance of applications and employ a rigorous selection process to identify the highest calibre of candidates.
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What should I do to be ready for an interview with AWS?To help you prepare for an interview with Amazon Web Services, we’ve compiled a list of the top five things you should know
- CloudObjects uses Amazon Simple Storage Service (S3) to store objects.
- A static webpage hosted on S3 and distributed through CloudFront on the Amazon Web Services cloud.
- Using AWS Lambda to create a serverless application.
- Launching an Amazon Elastic Compute Cloud-managed server.
- Terms referring to Amazon Web Services, such as AWS abbreviations AES, ADFS, ASG, etc.
What kind of questions might I expect to see during an interview with AWS?The five most often asked interview questions at AWS are as follows:
- What does the term “buffer” mean when talking about Amazon Web Services?
- Exactly why do we need to create subnets?
- Where does a region fit in with the Availability Zone?
- Explain the concept of an elastic transcoder.
- Exactly what does “VPC” mean to you?
When asked about AWS during an interview, how do you describe it?Amazon Web Services (AWS) is a division of Amazon.com that provides a comprehensive cloud-computing platform. Businesses, consumers, and government agencies can access a range of cloud computing services and application programming interfaces by subscribing to the platform. AWS integrates Infrastructure-as-a-Service (IaaS), Platform-as-a-Service (PaaS), and Software-as-a-Service (SaaS) offerings into a single, unified cloud computing platform.