Topic in Computer Networks & Cloud Computing
Cloud computing is the on-demand delivery of computing resources such as servers, storage, databases and software over the internet, usually billed per use. Core MCQs sort offerings into IaaS, PaaS and SaaS service models and public, private, hybrid and community deployment models, and ask about the NIST characteristics like rapid elasticity and resource pooling. Architecture questions cover virtualization and hypervisors, multi-tenancy, containers, serverless functions (FaaS), object storage such as Amazon S3, load balancers, auto-scaling and API gateways. Also expect cloud-native ideas like microservices and CI/CD pipelines, plus trade-offs involving vendor lock-in and the shared responsibility model.
Below are 30 practice questions from a pool of 210 Cloud Computing MCQs, one of 10 topics in Computer Networks & Cloud Computing. Each shows the correct answer with an explanation; when you are ready, take a timed quiz to test recall under exam conditions.
Each question below shows the correct answer with a full explanation. Use these to build conceptual understanding before attempting a timed quiz.
Q1. What is cloud computing?
Cloud computing is the on-demand delivery of computing resources (servers, storage, databases, networking, software) over the Internet with pay-as-you-go pricing.
Q2. What does IaaS stand for?
IaaS (Infrastructure as a Service) provides virtualized computing resources like virtual machines, storage, and networking over the Internet.
Q3. Which of the following is an example of SaaS?
Gmail is a SaaS (Software as a Service) application. Users access the software through a web browser without managing the underlying infrastructure.
Q4. What is virtualization in cloud computing?
Virtualization creates virtual versions of physical computing resources, allowing multiple virtual machines to run on a single physical server, maximizing resource utilization.
Q5. What is the main benefit of cloud computing's pay-as-you-go model?
The pay-as-you-go model means users only pay for the resources they consume, eliminating the need for large upfront capital expenditure on hardware.
Q6. What is the difference between horizontal and vertical scaling?
Horizontal scaling (scaling out) adds more machines to distribute the load. Vertical scaling (scaling up) adds more resources (CPU, RAM) to an existing machine.
Q7. What is a public cloud?
A public cloud is owned and operated by a third-party provider, offering computing resources to multiple customers over the Internet. Examples include AWS, Azure, and Google Cloud.
Q8. Which of the following is a major public cloud provider?
Amazon Web Services (AWS) is one of the largest public cloud providers, along with Microsoft Azure and Google Cloud Platform.
Q9. What is a hybrid cloud?
A hybrid cloud combines public and private clouds, allowing data and applications to move between them. This provides flexibility, more deployment options, and helps optimize infrastructure.
Q10. What is a private cloud?
A private cloud is cloud infrastructure that is dedicated to a single organization. It can be hosted on-premises or by a third party, offering more control and security.
Q11. What does PaaS provide?
PaaS (Platform as a Service) provides a platform including runtime, middleware, OS, and development tools for building and deploying applications without managing the underlying infrastructure.
Q12. What is scalability in cloud computing?
Scalability is the ability to easily increase or decrease computing resources (CPU, memory, storage) to match changing demand, which is a key advantage of cloud computing.
Q13. What is a hypervisor?
A hypervisor (or Virtual Machine Monitor) is software that creates and runs virtual machines. Type 1 runs directly on hardware; Type 2 runs on top of an operating system.
Q14. What is serverless computing?
Serverless computing abstracts server management. Users deploy functions (FaaS) and the cloud provider handles provisioning, scaling, and maintenance. Users pay per execution.
Q15. What is Kubernetes?
Kubernetes (K8s) is an open-source container orchestration platform that automates deploying, scaling, and managing containerized applications across clusters of machines.
Q16. What is the shared responsibility model in cloud security?
In the shared responsibility model, the provider secures the infrastructure (physical, network, hypervisor) while the customer secures their data, applications, access management, and configurations.
Q17. What is object storage in cloud computing?
Object storage manages data as objects (with metadata and unique identifiers) rather than files or blocks. It is highly scalable and ideal for unstructured data like images and videos. Examples include AWS S3.
Q18. What is cloud migration?
Cloud migration is the process of moving digital assets (data, applications, IT resources) from on-premises infrastructure to a cloud environment.
Q19. What is multi-tenancy in cloud computing?
Multi-tenancy means multiple customers (tenants) share the same physical infrastructure and software instances while their data remains logically isolated from each other.
Q20. What is edge computing and how does it relate to cloud computing?
Edge computing processes data close to where it is generated (at the network edge), reducing latency and bandwidth usage. It complements cloud computing for time-sensitive applications like IoT and autonomous vehicles.
Q21. What is the CAP theorem in distributed cloud systems?
The CAP theorem states that a distributed system cannot simultaneously guarantee Consistency (all nodes see the same data), Availability (every request gets a response), and Partition tolerance (system works despite network failures).
Q22. What is cloud-native architecture?
Cloud-native architecture builds applications as loosely coupled microservices, packaged in containers, managed by orchestration platforms, and deployed using CI/CD, fully leveraging cloud scalability and resilience.
Q23. What is Infrastructure as Code (IaC)?
IaC manages cloud infrastructure using code and automation tools (like Terraform, CloudFormation). It enables version control, reproducibility, and consistent environments.
Q24. What is auto-scaling in cloud computing?
Auto-scaling automatically adjusts the number of active computing resources based on real-time demand, ensuring performance during peaks and cost savings during low usage.
Q25. What is an SLA in cloud computing?
An SLA (Service Level Agreement) is a contract between a cloud provider and customer that defines guaranteed levels of service availability, performance, and support.
Q26. What is vendor lock-in in cloud computing and how can it be mitigated?
Vendor lock-in occurs when migration away from a provider is difficult due to proprietary APIs and services. It can be mitigated by using open standards, containers, abstraction layers, and multi-cloud strategies.
Q27. What is the difference between a container and a virtual machine?
Containers share the host OS kernel, making them lightweight and fast to start. VMs include a complete OS, providing stronger isolation but with more overhead.
Q28. What is the difference between disaster recovery (DR) and high availability (HA) in cloud?
High availability uses redundancy to minimize downtime during normal operations (e.g., load balancers, multi-AZ). Disaster recovery provides plans and infrastructure to recover from catastrophic failures across regions.
Q29. What is a cloud service mesh?
A service mesh (like Istio) is a dedicated infrastructure layer that handles service-to-service communication in microservices architectures, providing features like load balancing, encryption, observability, and traffic management.
Q30. What is FinOps in the context of cloud computing?
FinOps (Cloud Financial Operations) is a practice that enables organizations to manage cloud costs effectively through collaboration between technology, business, and finance teams, optimizing cloud spending.
Take a timed quiz drawn from 210+ questions on this topic. No signup required — your progress saves in your browser.
Start Cloud Computing Quiz