30 Cloud Computing & DevOps Quiz Questions & Answers

Below are 30 cloud computing & devops quiz questions with the correct answer and a short explanation for each. Use them to revise, host a quiz night, or prepare for competitions — then challenge yourself with the timed, interactive version on QuizOxa.

Cloud Computing & DevOps Quiz Questions and Answers

Q1. What does AWS stand for in cloud infrastructure?

✅ Answer: Amazon Web Services

💡 Amazon Web Services (AWS) is the world's most comprehensive and broadly adopted cloud platform.

Q2. What is Docker primarily used for in software development?

✅ Answer: Creating and running software in lightweight, isolated containers

💡 Docker is an open-source platform that packages applications and their dependencies into portable containers.

Q3. What is Cloud Computing?

✅ Answer: On-demand delivery of computing resources and storage over the internet with pay-as-you-go pricing

💡 Cloud computing eliminates physical server management by delivering servers, storage, databases, and networking over the cloud.

Q4. What does CI/CD stand for in modern software engineering workflows?

✅ Answer: Continuous Integration and Continuous Deployment

💡 CI/CD automates building, testing, and deploying code continuously to ensure rapid and reliable software releases.

Q5. Which cloud service model combines both on-premises private infrastructure and public cloud environments?

✅ Answer: Hybrid Cloud

💡 Hybrid cloud connects public cloud services (like AWS/Azure) with private on-premise infrastructure for flexibility.

Q6. What is Microsoft's primary cloud computing platform called?

✅ Answer: Microsoft Azure

💡 Microsoft Azure is a leading cloud platform offering IaaS, PaaS, and SaaS cloud solutions.

Q7. What is Kubernetes (often abbreviated as K8s)?

✅ Answer: An open-source system for automating deployment, scaling, and management of containerized applications

💡 Kubernetes orchestrates Docker containers across clusters of nodes, handling load balancing and self-healing.

Q8. What does SaaS stand for in cloud software delivery?

✅ Answer: Software as a Service

💡 Software as a Service (SaaS) delivers applications over the web directly to end-users (e.g., Google Workspace, Microsoft 365).

Q9. What is an S3 Bucket in Amazon Web Services?

✅ Answer: An object storage service for storing and retrieving any amount of data

💡 Amazon S3 (Simple Storage Service) is object storage offering high scalability, data availability, and security.

Q10. What is Git used for in DevOps software engineering?

✅ Answer: Distributed version control for tracking code changes

💡 Git tracks changes in source code during development, allowing teams to collaborate asynchronously via branches.

Q11. What is Infrastructure as Code (IaC)?

✅ Answer: Managing and provisioning infrastructure through machine-readable definition files rather than manual configuration

💡 IaC automates infrastructure setup using code files (e.g., Terraform, CloudFormation), enabling version control and repeatability.

Q12. What is a Dockerfile?

✅ Answer: A text script containing instructions to build a Docker container image

💡 A Dockerfile contains step-by-step commands (FROM, RUN, COPY, EXPOSE) used by Docker to assemble a container image.

Q13. What is Serverless Computing (such as AWS Lambda)?

✅ Answer: A cloud execution model where cloud providers automatically manage machine resource allocation

💡 Serverless computing executes code on-demand without requiring developers to manage, patch, or scale virtual servers.

Q14. What is the primary role of a Load Balancer in cloud architecture?

✅ Answer: Distributing incoming web traffic evenly across multiple server instances

💡 Load balancers prevent single server overload by distributing network requests across healthy backend server instances.

Q15. What is an Amazon EC2 instance?

✅ Answer: Elastic Compute Cloud - resizable virtual servers in the cloud

💡 Amazon EC2 provides scalable compute capacity, allowing users to launch virtual servers with chosen OS and specs.

Q16. In Kubernetes, what is a Pod?

✅ Answer: The smallest deployable computing unit consisting of one or more co-located containers

💡 Pods are the basic execution units in Kubernetes, encapsulating one or more containers sharing network and storage.

Q17. What does Continuous Integration (CI) require developers to do frequently?

✅ Answer: Merge code changes into a shared central repository where automated builds and tests run

💡 CI encourages developers to merge code changes daily, catching bugs early via automated unit tests and build checks.

Q18. What is AWS IAM used for?

✅ Answer: Identity and Access Management - managing permissions and access to AWS resources securely

💡 AWS IAM manages authentication and authorization, granting precise access policies to users, roles, and services.

Q19. What is an API Gateway in microservices architecture?

✅ Answer: A reverse proxy server that acts as a single entry point for API calls, handling routing and security

💡 API Gateways handle request routing, rate limiting, authentication, and SSL termination for backend microservices.

Q20. What is HashiCorp Terraform?

✅ Answer: An open-source Infrastructure as Code (IaC) tool for provisioning cloud resources across providers

💡 Terraform uses Declarative HCL (HashiCorp Configuration Language) to create, manage, and version cloud infrastructure.

Q21. What is a key fundamental difference between Docker containers and Virtual Machines (VMs)?

✅ Answer: Containers share the host OS kernel, while VMs require a full guest OS on a hypervisor

💡 Containers are lightweight because they virtualize the OS layer and share the host kernel, whereas VMs virtualize physical hardware.

Q22. In Kubernetes master node architecture, which component schedules pods onto available worker nodes?

✅ Answer: kube-scheduler

💡 The `kube-scheduler` watches for newly created pods without assigned nodes and selects worker nodes for them to run on.

Q23. What is a Blue-Green Deployment strategy?

✅ Answer: Maintaining two identical production environments (Blue and Green) to achieve zero-downtime releases

💡 Blue-Green deployment switches live router traffic instantly from the old active environment (Blue) to the updated one (Green).

Q24. What is Prometheus in the cloud-native CNCF ecosystem?

✅ Answer: An open-source monitoring and time-series metrics collection system

💡 Prometheus scrapes numeric metrics from monitored targets, powering real-time alerting and Grafana dashboards.

Q25. What does the CAP Theorem state for distributed data stores?

✅ Answer: A distributed system can simultaneously provide at most two of three guarantees: Consistency, Availability, and Partition Tolerance

💡 CAP theorem asserts that when network partitions occur (P), distributed systems must trade off between Consistency (C) and Availability (A).

Q26. What is an AWS Virtual Private Cloud (VPC)?

✅ Answer: An isolated private virtual network logically dedicated to your AWS account

💡 A VPC provides complete control over your virtual networking environment, including IP ranges, subnets, and route tables.

Q27. What is Helm in the Kubernetes ecosystem?

✅ Answer: A package manager for Kubernetes that uses charts to define, install, and upgrade complex applications

💡 Helm charts act as Kubernetes packages, allowing developers to manage application manifests cleanly.

Q28. What is Auto-Scaling in cloud infrastructure?

✅ Answer: Automatically adding or removing compute instances based on real-time traffic and CPU demand

💡 Auto-scaling dynamically grows capacity during traffic spikes to maintain performance and shrinks capacity during lulls to save costs.

Q29. What is Chaos Engineering (popularized by Netflix's Chaos Monkey)?

✅ Answer: Intentionally injecting faults into production systems to test resilience and recovery

💡 Chaos Engineering proactively tests distributed systems by simulating infrastructure failures under realistic conditions.

Q30. In Kubernetes, what is an Ingress Controller?

✅ Answer: A specialized load balancer that manages external HTTP/HTTPS access to cluster services

💡 Ingress Controllers configure edge load balancers to route external web traffic to internal Kubernetes services based on host/path rules.

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