COMPTIA A+ 220-1001: CLOUD
COMPUTING *Q&A* (100% Correct)
2025/2026 |VERIFIED|
What is cloud computing, and how does it differ from traditional on-premises computing?
Cloud computing refers to the delivery of computing services—such as storage, processing power,
and applications—over the internet, allowing users to access resources without having to manage
physical servers. Unlike traditional on-premises computing, where resources are hosted and managed
within an organization’s physical infrastructure, cloud computing relies on third-party providers to
manage and maintain resources off-site.
Describe the key characteristics of cloud computing and their benefits.
The key characteristics of cloud computing include on-demand self-service, broad network access,
resource pooling, rapid elasticity, and measured service. These features offer benefits such as cost
savings, flexibility, scalability, and remote access, allowing organizations to focus on their core business
instead of managing IT infrastructure.
What are the three main deployment models of cloud computing?
The three main deployment models of cloud computing are public cloud, private cloud, and
hybrid cloud. The public cloud is owned and operated by a third-party provider and offers resources to
the general public. The private cloud is used exclusively by one organization and can be hosted either on-
premises or by a third party. The hybrid cloud combines elements of both public and private clouds to
provide greater flexibility.
How does a hybrid cloud model benefit an organization?
A hybrid cloud model allows organizations to take advantage of the scalability and cost-
effectiveness of the public cloud while maintaining control and security of sensitive data within a private
cloud. It provides flexibility, enabling businesses to move workloads between clouds as needs change,
helping to optimize performance and cost.
What is SaaS (Software as a Service) in cloud computing, and what are its advantages?
Software as a Service (SaaS) is a cloud computing model that delivers software applications over
the internet on a subscription basis. Its advantages include reduced upfront costs, easy access from any
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, device with an internet connection, automatic updates, and scalability. It allows businesses to focus on
using the software rather than maintaining it.
What is the difference between IaaS, PaaS, and SaaS in cloud computing?
Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, such
as storage, processing power, and networking. Platform as a Service (PaaS) offers a platform that allows
developers to build, deploy, and manage applications without worrying about the underlying
infrastructure. Software as a Service (SaaS) provides fully managed software applications to end-users.
Explain the concept of elasticity in cloud computing and its importance.
Elasticity in cloud computing refers to the ability to dynamically scale resources up or down based
on demand. This is important because it allows businesses to handle varying workloads efficiently,
ensuring they only pay for the resources they need at any given time, thus optimizing costs.
What is the role of virtualization in cloud computing?
Virtualization allows multiple virtual machines (VMs) to run on a single physical server by
abstracting the hardware. This is crucial in cloud computing because it maximizes resource utilization,
enables the efficient allocation of resources, and provides the flexibility to quickly create or delete virtual
environments as needed.
What are the key security concerns in cloud computing?
Key security concerns in cloud computing include data breaches, data loss, lack of control over
infrastructure, and vulnerabilities in multi-tenant environments. Organizations must ensure that their
cloud provider implements strong security measures, including encryption, access controls, and disaster
recovery plans, to mitigate these risks.
What are some common cloud service providers, and what services do they offer?
Some common cloud service providers include Amazon Web Services (AWS), Microsoft Azure, and
Google Cloud Platform (GCP). These providers offer a wide range of services such as computing power
(EC2 for AWS), storage (S3 for AWS), databases, networking, and machine learning tools, among others.
What is the significance of data redundancy in cloud computing?
Data redundancy ensures that copies of critical data are stored in multiple locations. This is
important in cloud computing to ensure data availability and reliability in the event of hardware failure,
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