Q/A on Cloud Computing & AWS Fundamentals
Let's Know about few Important Cloud Basics Interview Q/A
1. What is Cloud Computing and why is it important?
Cloud computing is the delivery of on-demand computing resources over the internet.
It is important because it provides security, flexibility, scalability, cost savings, and reliability, allowing businesses to focus on their core competencies rather than managing complex IT infrastructure.
2. What are the main benefits of using cloud computing in AWS?
Scalability: AWS allows users to scale resources up or down based on demand for optimal performance and cost efficiency.
Cost savings: Organizations pay only for the resources they use, reducing upfront hardware investment and operational costs.
Reliability and availability: AWS offers a highly reliable infrastructure with multiple data centers for high availability.
Flexibility: Users can choose from a wide range of services to meet their specific needs.
Global reach: AWS has data centers worldwide for global deployment.
3. Explain the different service models in Cloud Computing.
Infrastructure as a Service (IaaS): Users manage applications and configurations, while the provider handles physical infrastructure.
Platform as a Service (PaaS): Providers manage the infrastructure, and runtime environment, and users focus on application development.
Software as a Service (SaaS): Complete applications are delivered via the Internet with no installation or maintenance required.
4. What is AWS? How does it fit into the Cloud Computing landscape?
AWS (Amazon Web Services) is a cloud computing platform by Amazon, that offers a wide range of cloud services.
It fits into the cloud computing landscape as a leading provider, offering scalable, reliable, and cost-effective infrastructure for businesses of all sizes.
5. Name some of the core services offered by AWS.
Amazon EC2
Amazon S3
Amazon RDS
Amazon VPC
AWS Lambda
Amazon CloudFront
6. What is an EC2 instance in AWS?
An EC2 instance is a virtual server in AWS that provides compute capacity for running applications and services. It's scalable and customizable.
7. Explain the concept of Availability Zones in AWS.
Availability Zones (AZs) are physically separate data centers within an AWS Region.
They provide high availability and fault tolerance by distributing resources across multiple locations to protect against failures.
8. What is IAM in AWS? Why is it important?
IAM is Identity and Access Management in AWS, managing access to resources.
It is important for security, as it enforces the principle of least privilege and helps control user access.
9. How can you secure your AWS resources using Identity and Access Management (IAM) policies?
Use the least privilege.
Regularly review and audit policies.
Enable multi-factor authentication (MFA).
Apply for IAM roles for services and applications.
Regularly rotate access keys.
Use IAM conditions for additional restrictions.
10. What is an AWS Region and how does it relate to Availability Zones?
An AWS Region is a geographical area with multiple data centers.
Availability Zones within a Region are physically separated data centers connected for high availability and fault tolerance. Users can deploy resources in multiple AZs for redundancy and disaster recovery.