AWS Interview Questions – Cloud Computing
1. [Asked in Infosys] What is Cloud Computing?
Answer:
Cloud computing is a technology that allows users to access computing resources (such as servers, storage, databases, networking, and software) over the internet instead of maintaining physical infrastructure. It provides on-demand resources with pay-as-you-go pricing.
2. [Asked in TCS] What are the key characteristics of cloud computing?
Answer:
The five essential characteristics of cloud computing are:
- On-Demand Self-Service – Users can provision computing resources as needed.
- Broad Network Access – Accessible over the internet from any device.
- Resource Pooling – Multiple users share computing resources.
- Rapid Elasticity – Scale up or down based on demand.
- Measured Service – Pay for what you use.
3. [Asked in Cognizant] What are the different types of cloud computing models?
Answer:
Cloud computing models are classified into three types:
- Infrastructure as a Service (IaaS): Provides virtual machines, storage, and networking (e.g., AWS EC2, S3).
- Platform as a Service (PaaS): Offers runtime environments for applications (e.g., AWS Elastic Beanstalk, AWS Lambda).
- Software as a Service (SaaS): Delivers ready-to-use applications (e.g., Gmail, Google Drive, AWS WorkSpaces).
4. [Asked in IBM] What are the different types of cloud deployment models?
Answer:
There are four primary deployment models:
- Public Cloud: Resources are available to the public over the internet (e.g., AWS, Azure, Google Cloud).
- Private Cloud: Resources are dedicated to a single organization (e.g., on-premises cloud).
- Hybrid Cloud: Combination of public and private clouds.
- Multi-Cloud: Using multiple cloud providers for redundancy and flexibility.
5. [Asked in Wipro] What are the advantages of cloud computing?
Answer:
Cloud computing offers several benefits:
✔ Cost Efficiency – No upfront hardware costs; pay only for what you use.
✔ Scalability – Resources can be scaled up/down as needed.
✔ Reliability – Redundant cloud infrastructure ensures high availability.
✔ Security – Leading cloud providers offer built-in security controls.
✔ Flexibility – Access from anywhere with an internet connection.
6. [Asked in Deloitte] What are some common use cases of cloud computing?
Answer:
Cloud computing is widely used in:
- Web Hosting: Hosting dynamic and static websites.
- Data Storage & Backup: Storing and securing data with AWS S3, Glacier.
- Big Data & Analytics: Processing large datasets efficiently using AWS EMR, Redshift.
- Machine Learning & AI: Deploying ML models with AWS SageMaker.
- DevOps & CI/CD: Automating software deployment using AWS CodePipeline, CodeDeploy.
7. [Asked in Amazon] What security challenges are associated with cloud computing?
Answer:
Common security challenges include:
- Data Privacy & Compliance: Ensuring regulatory compliance (GDPR, HIPAA).
- Unauthorized Access: Protecting resources with Identity & Access Management (IAM).
- Data Loss & Leakage: Using encryption and backup strategies.
- DDoS Attacks: Protecting cloud infrastructure with AWS Shield and WAF.
8. [Asked in Microsoft] What is serverless computing in cloud computing?
Answer:
Serverless computing allows developers to run applications without managing servers. It automatically scales resources based on demand, and users are billed only for execution time.
Example: AWS Lambda, which runs functions on demand.
9. [Asked in Google] What is the difference between Virtualization and Cloud Computing?
Answer:
| Virtualization | Cloud Computing |
|---|---|
| Creates virtual machines (VMs) on a single physical machine. | Provides on-demand computing resources over the internet. |
| Managed within an organization’s data center. | Managed by cloud providers like AWS, Azure, Google Cloud. |
| Requires manual scaling. | Offers automatic scaling capabilities. |
10. [Asked in Flipkart] What is the “pay-as-you-go” pricing model in cloud computing?
Answer:
The pay-as-you-go (PAYG) model allows users to pay only for the computing resources they use. It eliminates upfront costs and helps businesses scale efficiently without overprovisioning resources.
Example:
- AWS EC2 – Pay for compute capacity per second.
- AWS S3 – Pay for storage used in GB/month.
