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Cloud Computing QUESTIONS

Exam NameCloud Computing QUESTIONS
DescriptionCloud Computing QUESTIONS and Answers exams contains the questions from various interview of IT industry.These questions are helpful to crack the IT interview.
Exam TypeMASTER EXAM
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creatorPayal(314)
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Question: Can you please explain the difference between vertical scale up and Horizontal scale out?


Answer:Vertical scale up provides more resources to a single computational unit, whereas horizontal scale out provides additional computational unit and run them in parallel.
Vertical scale up provides a provision to move a workload to other system that doesn’t have workload, whereas horizontal scale out split the workload among various computational units.
Vertical scale up doesn’t have a database partitioning concept, whereas horizontal scale out provides the database partitioning.


Question: Explain what is the use of defining cloud architecture?

Answer:Cloud architecture is a software application that uses on demand services and access pool of resources from the cloud. Cloud architecture act as a platform on which the applications are built. It provides the complete computing infrastructure and provides the resources only when it is required. It is used to elastically scale up or down the resources according to the job that is being performed.


Question: What are the three differences that separate out cloud architecture from the tradition one?

Answer:The three differences that make cloud architecture in demand are:
1. Cloud architecture provides the hardware requirement according to the demand. It can run the processes when there is a requirement for it.
2. Cloud architecture is capable of scaling the resources on demand. As, the demand rises it can provide infrastructure and the services to the users.
3. Cloud architecture can manage and handle dynamic workloads without failure. It can recover a machine from failure and always keep the load to a particular machine to minimum.


Question: What is the business benefits involved in cloud architecture?

Answer:1. Zero infrastructure investment:
Cloud architecture provide user to build large scale system with full hardware, machines, routers, backup and other components. So, it reduces the startup cost of the business.

2. Just-in-time Infrastructure: It is very important to scale the infrastructure as the demand rises. This can be done by taking cloud architecture and developing the application in the cloud with dynamic capacity management.

3. More efficient resource utilization: Cloud architecture provides users to use their hardware and resource more efficiently and utilize it in a better way. This can be done only by applications request and relinquish resources only when it is needed (on-demand).


Question: what are the different roles defined by cloud architecture?

Answer:Cloud architecture defines three roles:
Cloud service consumer: it is used to provide different services to the consumer on demand.
Cloud service provider: here provider provides the services to meet the requirements of the user by monitoring the traffic and demands that are coming.
Cloud service Creator: here creator is used to create the services and provide the infrastructure to the user to use and give the access to the resources.

The roles that are being defined can be performed by one person or it can be performed by many people together. There can be more roles defined depending on the cloud architecture and the complexity with which it will scale.


Question: Explain what are the major building blocks of cloud architecture?

Answer:The major building blocks of cloud architecture are:
1. Reference architecture: it is used for documentation, communication, designing and defining various types of models
2. Technical Architecture: defines the structured stack, structure the cloud services and its components, show the relationship that exist between different components, management and security
3. Deployment Operation Architecture: it is used to operate and monitor the processes and the services.


Question: Explain Infrastructure as a service?

Answer:It provides the consumer with hardware, storage, network and other resources on rent. Through this consumer can deploy and run software using dedicated software. This includes the operating system and the applications that are associated with it.


Question: Explain Platform as a service?

Answer:it provides the user to deploy their software and application on the cloud infrastructure using the tools that are available with the operating system.


Question: Explain Software as a service?

Answer:it provides the users the ability to run its application on the cloud infrastructure and can access it from any client device using any interface like web browser.


Question: Explain Business Process as a service?

Answer:it provides any business process that is delivered through cloud service model using the internet and accesses the resources through the web portal.


Question: what are the different components required by cloud architecture?

Answer:There are 5 major components of cloud architecture.
1. Cloud Ingress: provides a mean to communicate with the outside world. This can be done with the help of communication methods such as:
Queue based communications
HTTP communications
REST/SOAP
Service Bus
2. Processor Speed: processor speed is the major section on which the whole cloud architecture is based. It provides on demand resources that can be dynamically allocated to the user. It saves lots of cost and has many benefits of virtualization.

3. Cloud storage services: cloud services provide means to store data to user’s applications. It is used to provide services for different types of storages like: table data, files.

4. Cloud provided services:
Additional services are provided by the cloud, like data services, payment processing services, and search or web functionality services.

5. Intra-Cloud communications: it provides a way to communicate with other systems that are using cloud architecture. Providers usually provide services so that one user can communicate easily with another user by being on cloud.


Question: what are the different phases involves in cloud architecture?

Answer:There are four phases that basically gets involved in the cloud architecture:
1. Launch phase: it launches the basic services and makes the system ready for communication and for application building
2. Monitor phase: it monitors the services that is being launched and then manages them so that on demand the user will be able to get what he wants.
3. Shutdown phase: it shutdown the services that are not required first and after all the services gets shutdown, and then it closes the system services.
4. Cleanup phase: it clean up the left out processes and services that is being either broken or didn’t get shutdown correctly.


Question: Explain what is the relationship between SOA and cloud architecture?

Answer:Service oriented architecture (SOA) is an architectural style that supports service oriented methodology that is being added in the cloud architecture as a mandatory component. Cloud architecture support the use of on-demand access to resources and it provides lots of other facilities that are being found in SOA as well. SOA makes these requirements optional to use. But, to get the full functionality and more performance based efficiency there is a requirement for the mixture of SOA and cloud architecture.


Question: What are the different cloud service models in cloud architecture?

Answer:There are 4 types of cloud service models available in cloud architecture:
1. Infrastructure as a service:
It provides the consumer with hardware, storage, network and other resources on rent. Through this consumer can deploy and run software using dedicated software. This includes the operating system and the applications that are associated with it.

2. Platform as a service: it provides the user to deploy their software and application on the cloud infrastructure using the tools that are available with the operating system.

3. Software as a service: it provides the users the ability to run its application on the cloud infrastructure and can access it from any client device using any interface like web browser.

4. Business Process as a service: it provides any business process that is delivered through cloud service model using the internet and accesses the resources through the web portal.


Question: Explain what is Hypervisor in Cloud Computing and its types?

Answer:The hypervisor is a virtual machine monitor (VMM) that manages resources for virtual machines. The name hypervisor is suggested as it is a supervisory tool for the virtual machines. There are mainly two types of hypervisors :

Type-1: the guest Vm runs directly over the host hardware, e.g Xen, Hyper-V, VmWare ESXi

Type-2: the guest Vm runs over hardware through a host OS, e.g Kvm, Oracle virtualbox


Question: Tell me what are the characteristics on which a Cloud Computing Model should be selected for implementing and managing workload?

Answer:Scalability is a characteristic of cloud computing through which increasing workload can be handled by increasing in proportion the amount of resource capacity. It allows the architecture to provide on demand resources if the requirement is being raised by the traffic. Whereas, elasticity is being one of the characteristic provide the concept of commissioning and decommissioning of large amount of resource capacity dynamically. It is measured by the speed by which the resources are coming on demand and the usage of the resources.


Question: Explain what do you understand by CaaS?

Answer:CaaS is a terminology given in telecom industry as Communication as a Service. The Voice-over-Ip (VoIP) follows a same delivery model. CaaS can offer the enterprise user features such as desktop call control, presence, unified messaging, and desktop faxing. In addition to the enterprise features, CaaS also has a set of services for contact center automation that includes IVR, ACD, call recording, multimedia routing (e-mail and text chat), and screen pop integration.


Question: Tell me does network topology play an important role in deciding the success of a Cloud Infrastructure?

Answer:The network topology plays a vital role in selecting a cloud model and success of that model

Public Cloud
These are the platforms which are public means open to the people for use and deployment. For example, google, amazon etc. They focus on a few layers like cloud application, infrastructure providing and providing platform markets.

Private Cloud
Organizations choose to build their private cloud as to keep the strategic, operation and other reasons to themselves and they feel more secure to do it.

Hybrid Clouds
It is the combination of public and private cloud. It is the most robust approach to implement cloud architecture as it includes the functionalities and features of both the worlds.


Question: Explain how is the Cloud Computing different from primitive Client-Server Architecture?

Answer:The primitive Client-Server architecture is a one-to-one communication between only two physical machines namely Client machine and Server machine (datacenter). Whereas the cloud computing, infrastructure is similar at the client side but varies at server-side. The server-side contains a main Cloud Controller that forwards the request to its worker machines known as Nodes. These nodes are a grid computing machines that dedicate all its resources to process application. These nodes are maintained in clusters. So a cloud computing infrastructure is quite complicated on server side that processes all the requests from clients and send the result back.



Question: Do you know how is MapReduce related to cloud computing?

Answer:The mapreduce framework contains most of the key architecture principles of cloud computing such as:

Scale: The framework is able to expand itself in direct proportion to the number of machines available.
Reliable: The framework is able to compensate for a lost node and restart the task on a different node.
Affordable: A user can start small and over time can add more hardware.

Due to the above features the mapreduce framework has become the platform of choice for the development of cloud applications.