Cloud Computing Interview Questions

If you are an aspiring Cloud developer and have interviews lined up, go through these Cloud Computing interview questions that are frequently asked by interviewers of top companies. These Cloud Computing interview questions and answers are curated by our team of experts. These will help you land the best jobs as a Computing Architect, Cloud Solution Architect, etc and will equip you to answer questions on Cloud Computing basics, drivers of Cloud Computing, hybrid cloud, and multi-cloud services among others.

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Hypervisors is a software which is used to virtualise physical server to logical servers to optimise resource utilization Hypervisors are divided into two types.

Bare metal hypervisor are deployed over physical server are classified as  Type one hypervisor. Some examples of the type 1 hypervisors are Microsoft Hyper-V hypervisor, VMware ESXi, Citrix XenServer.

When hypervisor run on top of OS then it its type2 hypervisor and examples are. Kvm, oracle virtualbox

Multi cloud is cloud deployment model where IT infrastructure resource like compute, storage, network band width are used from multi cloud service or in house Data centre to complete business transaction. Its pooling of resources from different cloud service provider or combination of IT resource from in house Data centre and cloud services. This model is good use case where business function resources can not be met from one location.

The cloud hosting drivers when identifying workloads are following

  1. High growth workloads: When workloads are growing faster than anticipated or unexpected growth rate then workloads are fit for cloud hosting. The cost of hosting will reduce with increased resource capacity, as capacity in the cloud is cheaper due to economy of scale compare to private infrastructure capacity.
  2. Throughput intensive applications: The reporting and analytics workloads are compute intensive to process large set of data and provide high throughput. Look for the top applications in terms of throughput. These kinds of applications are right fit for cloud hosting.
  3. Low I/O density workloads: The workloads which are not low I/O density and not sensitive to end user response time and no dependency on on premise workloads are right fit for cloud hosting.

Business application which handles missing critical, ERP and data sensitive information are not fit for cloud hosting. The applications which are running other than Intel platform are also not fit for immediate migration to cloud platform.

Performance issues: The applications which demands low latency, high network throughput and high performance  are not fit for cloud hosting.

Sensitive data: There are data which are sensitive in nature like credit card information, health record, bank details of customer which needs to protected and these information needs to be maintained within organization boundary and cannot be shared with third party due to regulatory restriction so these data can be not hosted in cloud.

Application architecture: Business application which are running consistently over the years and meeting performance  and operation demand are not fit for cloud hosting as change of environment from physical to virtual may affect performance and availability of services


National Institute of Standards and Technology(NIST) defined Cloud computing  as a model facilitate on-demand globally accessible network to a shared pool of computing resources (e.g., networks, servers, storage, applications, and services) that can be provisioned by self service portal  provided by cloud service provider.

Cloud Computing is a new class of network based computing services that is available over the Internet, This model is similar to Utility Computing a collection/group of integrated and networked hardware, software and Internet infrastructure (called a platform).

 a. Internet based web service provides hardware, software and networking services to end users

 b. These cloud platforms provides simple GUI and APi (Application Programming interface) to access web based computing resources hiding underlying infrastructure details and complexity to end users.

 c. In addition, the platform provides on demand services, that are always on, anywhere, anytime and any place.

 d. Pay for use and as on demand, elastic

 e. scale up and down in capacity

 f. The hardware and software services are available to everyone e.g public, enterprises, corporations and businesses markets

Cloud Computing is a collection of layers formed together to deliver a IP based computing, virtualization is a layer/module inside cloud computing architecture which will enable the providers to deliver the IaaS "Infrastructure as a Service" on the fly.

Virtualization is a Software which creates “separated” multiple images of the hardware and software on the same machine. This makes possible to install multiple OS, multiple software and multiple applications on the same physical machine.

Virtualization: More Servers on the Same Hardware;

Cloud Computing: Measured Resources, Service based delivery, Pay for What You Use.

The globalization of business, difficult economic environment and the on-demand consumption model for consumers have increased the pressure on organizations to be agile and cost effective. Cloud computing helps organization to competitive and expand. The key drivers of cloud computing are cost, risk and agility. The cloud computing drivers are depicted in below diagram:

Drivers of Cloud Computing

Cloud types depends how to describe the services are delivered as well as underlying ownership. Cloud deployment types describe the nature of the specialised services that are offered.

Public Clouds – Public Clouds- Public cloud is the most  common and popular cloud option adopted by users. The IT infrastructure resources like compute, network, storage in secured manner at low cost is available at public cloud environment. these IT infrastructures are shared amongst multiple clients therefore it is cheaper to use. All the resources are accessed and managed by web browser over internet.Public cloud services provided offering are Infrastructure as a service (IaaS), platform as a Service (PaaS) ans Software as a service (SaaS). Some of the public cloud offering are office 365, salesforce etc.

Advantage of Public Cloud:

  • Economics of scale as per unit cost reduces with increase in consumption volume
  • It reduces time to market and brings agility in business
  • Users can increase and reduce consumption of resource dynamically depending on business requirement.

Disadvantages Of Public Cloud:

  • Fewer options for customization
  • Less secure compare to private cloud or on premises Data centre
  • Fixed architecture cannot (at times) grow with the needs of the business
  • Private Clouds – A private cloud consists of computing resources used exclusively by one business or organisation. The private cloud can be physically located at organisation’s on-site data center or it can be hosted by a third-party service provider. private cloud, the services and infrastructure are always maintained on a private network and the hardware and software are dedicated solely to your organisation.

Advantages Of Private Cloud:

  • Provide cloud has more customizable security options and capabilities to meet organization requirement for internal users with business growth and be expanded or changed as needed compare to public cloud

Disadvantages Of Private Cloud:

  • Management and IT department stake holder should be in same page to make private cloud
  • Private cloud needs huge capital investment in the initial phase
  • It takes long time to deliver services compare to public cloud

Hybrid Clouds – Hybrid cloud combines the benefit of public and private cloud to reduce cost and distribute work load as per business demand. Hybrid cloud allows flow of data between private and public cloud in secure manner. It gives more flexibility and deployment option to enterprise organization.

Advantages Of Hybrid Cloud:

  • Hybrid cloud combines the benefit of both private and public cloud
  • It provides resource access to both internal and external users
  •  Hybrid cloud helps to modernize applications and processes incrementally as resources permit.

Disadvantages Of Hybrid Cloud:

  • Hybrid cloud security management is a big challenge
  • Standardization of rules and policies to govern infrastructure and data governance in hybrid cloud is difficult

Currently,lists as below:

  • Infrastructure as a Service (IaaS) – Virtual or physical hardware resources (e.g. compute, storage, network) offered as a service. IaaS is provided using a shared, multi-tenant IT infrastructure through on-demand services. IaaS enables the end-user to provision servers, storage, networks, and other fundamental computing resources. End-users are able to deploy and run software, which can include operating systems and applications, on cloud-based servers. The end-user does not manage or control the underlying cloud infrastructure but has control over operating systems, data, deployed applications.
  • Platform as a Service (PaaS) – delivers a computing platform or solution stack as a service, most often providing a complete development platform for organisations requiring a development instance of an application.
  • Software as a Service (SaaS) – a hosted application accessed through a web browser. SaaS alleviates the maintenance and technical operation and support of business and consumer software. Management  or control the underlying cloud infrastructure including network, servers, operating systems, storage, application management is part of cloud SaaS provider. SaaS is offered with a subscription instead of traditional software license. The Pictorial representation is shown below:

types exist for cloud computing

The basic characteristics of Cloud computing mentioned below:

Scalability: Infrastructure capacity scale up for traffic spikes in real time

Resiliency: Cloud providers have mirrored images in more than one location to minimize downtime in the event of a disaster. This type of resiliency can give businesses the sustainability they need during unanticipated events.

On-demand self-service: Self service portal allowing cloud end users to provision compute, network, storage and databases services any time any where without human intervention automatically.

Broad network access: Cloud services are accessible over internet from any where any time. End users can connect to cloud services using laptop, tab or mobile phones over internet.

Resource pooling: Foundation of Cloud service model is multi tenancy to enable sharing of resources amongst end users of different organization scattered over multiple region. Clients are free to choose compute, storage, network, database resources available at many location depending upon their business function. The cloud service provider Data centre is located all over the globe.

Rapid elasticity: Resource provision to meet business function as per demand can be scale up and scale down rapidly and elastically as resource is available for usage appear to be unlimited and can be purchased in any quantity at any time.

Measured Service. The services or resources used by users are measured correctly and displayed in dash board of cloud portal to enable users to track their consumption pattern against every resource and to keep a tab on cost on resource consumption.


Cloud Computing is the delivery of computing services like servers, storage, databases, networking, software, analytics, intelligence and many more over the Internet (“which is called Cloud”) to offer faster innovation, flexible resources and economies of scale. The organization which offer these services is called Cloud provider.

Today, the scope of Cloud Computing is huge as it is very fast emerging business standard. Many organizations are experiencing the fruits of Cloud applications in a few different ways. Also, the features like less cost, faster speed, globally scalable, more productivity, and most important data protection from potential threats are responsible for a big shift from the traditional way businesses to the cloud computing services.  

The rapid shift to the Cloud in an era of innovation  has offered many organizations to employ a cloud-first approach to product design and some technology and business innovations available as cloud services. Microsoft is the global leading provider of Cloud computing services for businesses of all sizes. There are many companies who offer Cloud Computing services and referred Cloud Computing providers. These top Cloud Computing companies are Microsoft, SAP, Oracle, Google, IBM, at&t, Salesforce. etc.

According to 2019 Cloud Computing report by Forrester,, Dave Bartoletti, Vice President and  Principal Analyst at Forrester has pegged 2019 as the year of widespread enterprise adoption of cloud to power digital transformation efforts. Moreover, he also stated that "In 2019, cloud computing will be shorthand for the best way to turn disruptive ideas into amazing software."

According to PayScale’s predictions for the hottest jobs in 2019, the median pay of Cloud Computing software developer is $108.000 per year. Also, individuals skilled in areas like AI, cloud computing, digital marketing and cyber security are predicted to be in high demand in 2019,” Katie Bardaro, lead economist and vice president of data analytics at PayScale, told FOX Business.

We have brought a hand-picked top Cloud computing interview questions after lots of detailed research to help you in your interview. These Cloud computing interview questions and answers for experienced and freshers alone will help you excel the Cloud job interview and provide you an edge over your competitors. Therefore, in order to get success in the interview, you need to go through these questions and practice these Cloud computing interview questions as much as possible.

If you want to make your career in Cloud, then you need not to worry as the set of Cloud Computing interview questions designed by experts will guide you to get through the Cloud interviews. Stay in-tune with the following interview questions and prepare beforehand to become familiar with the interview questions that you may come across while searching for a dream job. Hope these Cloud Computing Interview Questions will help you to crack the interview. All the best!

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