AWS Interview Questions And Answers
AWS Interview Questions For Freshers
Let us start with a few basic yet important AWS Cloud interview questions ideal for freshers with little to no work experience as AWS professionals:
EC2 is a cloud-based virtual machine that provides you with OS-level control. The cloud server can be run according to the user's preference when they want to deploy their own servers in the cloud. Being functionally similar to the on-premise servers, EC2 provides you with complete control over the hardware you want to use and updates you want to have on your virtual machine.
In the world of AWS, SnowBall refers to a small application allowing users to transfer large volumes of data (often in terabytes) within and outside the AWS environment.
While working with AWS, CloudWatch helps you monitor different AWS environments like RDS Instances, EC2, and CPU utilization. It is also capable of triggering alarms according to the specific pre-decided metrics.
Elastic Transcoder in AWS is a service tool that helps users change a video’s resolution and format to support multiple devices like smartphones, tablets, laptops, and more.
It is a framework, so Angular In AWS, VPC stands for Virtual Private Cloud. Being logically isolated from other networks, it lets you customize your networking configuration in the cloud. It helps you obtain your range of private IP addresses, subnets, internet gateways, and security groups.
Here are the four key storage classics available in Amazon S3:
- Amazon S3 Standard
- Amazon Glacier
- Amazon S3 Standard-Infrequent Access
- Amazon S3 Reduced Redundancy Storage
Here are the major types of cloud services organizations across the globe demand:
- Software as a Service (SaaS)
- Infrastructure as a Service (IaaS)
- Data as a Service (DaaS)
- Platform as a Service (PaaS)
Advanced AWS Interview Questions
Let us now have a look at some of the most important AWS Cloud interview questions and answers suited for experienced IT professionals:
In AWS, S3 stands for Simple Storage Service. The interface can be used for storing and retrieving a specific amount of data at any time and from any location on the web. It runs on the “pay as you go” pricing model that prevents you from paying for services you do not use.
Amazon S3 is capable of offering high availability with low latency due to the following factors:
- Dependency - Route 53 in Amazon S3 provides users with high dependability when it comes to running critical applications.
- Globally Distributed Servers - Being a global server, Amazon has its DNS servers across the globe. Any AWS customer creating a query from any corner of the world can reach a DNS server that is local to them, ensuring low latency.
- Optimal Locations - Route 53 is capable of serving requests to the client sending a request from the nearest data center. It caches the data on multiple data centers situated in different regions around the world depending on the chosen configuration.
Being an inherently REST service, you can send a request to Amazon S3 with the help of a REST API or the wrapper libraries of the AWS SDK.
Here are the major types of instances in AWS:
- Memory-optimized
- Compute optimized
- Accelerated computing
- Storage optimized
- General purpose
The Availability Zone in AWS refers to a physical location where an Amazon data center is situated. The AWS Region, on the other hand, is a collection of Availability Zones belonging to a specific region.
The setup with these locations makes your services more available by letting you place your Virtual Machines in multiple data centers within the confines of an AWS Region. If one data center fails in a specific Region, the client requests do not stop and keep getting served from the remaining data centers belonging to the same region.
- On-demand Instance - As the name suggests, this instance is prepared whenever the user needs it. While it is cheap in the short-term scheme of things, it may not be the most cost-effective option in the long run.
- Spot Instance - This is an instance you can buy through a dedicated bidding model. These are relatively cheaper than on-demand instances.
- Reserves Instance - You can create this instance in AWS and reserve it almost for a year. Creating these instances is beneficial especially if you are aware of the need for an instance in advance. This is the most cost-effective alternative for AWS users in the long term.
When you stop an EC2 instance, you shut the instance down as you would switch off your PC. This does not lead to the deletion of the volumes attached to the instance and it can be switched on again when needed.
On the other hand, when you terminate an EC2 instance, it is as good as deleting it completely. It leads to the deletion of all volumes attached to the instance and it becomes impossible to restart the instance in the future.
In AWS, Power User Access provides users with Administrator Access without the need to manage users and permissions. It is possible for Power User Access to create, delete, modify, and visualize the resources. However, they cannot grant permissions to other users.
Frequently Asked Questions
Is there a demand for AWS jobs in 2023?
Yes, the demand for AWS jobs in 2023 is steadily increasing as more and more companies are embracing digitization. Making a much-needed switch from traditional on-premise platforms, cloud services have provided users with high flexibility, scalability, and efficiency. AWS facilitates seamless data management and helps companies attain their inherent objectives in the best way possible.
What are the educational qualifications to become an AWS professional?
While there are no mandatory and fixed educational qualifications needed to become an AWS professional, graduates with a degree in Computer Science and related fields have a better chance at excelling in the field. Moreover, certifications are extremely important to get desirable AWS jobs across the globe. AWS Certified Solutions Architect and other major certifications prove the skills and competence of professionals in the realm of AWS development.
Which certification is suitable for AWS beginners?
Beginners are advised to opt for associate-level certifications before going to more advanced levels. This helps them obtain and certify their base-level knowledge of the technology and its implications in the corporate world.
Does being an AWS professional pay well?
Yes, AWS professionals receive handsome salary packages across the globe. As of 2023, the average salary earned by an AWS Solutions Architect is over $150,000.
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