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Cloud Computing Interview Questions & Answers - Learning Mode

Cloud Computing Interview Questions & Answers - Learning Mode

Cloud Computing refers to manipulating, configuring, and accessing the hardware and software resources remotely. It offers online data storage, infrastructure, and application. In the simplest terms, cloud computing means storing and accessing data and programs over the Internet instead of your computer's hard drive. The cloud is just a metaphor for the Internet. Cloud computing is a kind of Internet-based computing that provides shared processing resources and data to computers and other devices on demand. Cloud computing is a type of computing that relies on sharing computing resources rather than having local servers or devices to handle applications.

Try Cloud Computing Interview Questions & Answers - Exam Mode

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Cloud Computing Interview Questions & Answers - Learning Mode
Try Cloud Computing Interview Questions & Answers - Exam Mode
Question: Explain hybrid and community cloud?

Answer: Hybrid cloud: It consists of multiple service providers. It is a combination of public and private cloud features. It is used by the company when they require both private and public clouds both.

Community Cloud: This model is quite expensive and is used when the organizations having common goals and requirements, and are ready to share the benefits of the cloud service. Source:
Question: What are the advantages and disadvantages of IaaS layer?

Answer: Advantages of IaaS cloud computing layer

1) You can dynamically choose a CPU, memory and storage configuration as per your needs.

2) You easily access the vast computing power available on IaaS cloud platform.

3) You can eliminate the need of investment in rarely used IT hardware.

4) IT infra will be handled by the IaaS cloud computing platform vendors.
Disadvantages of IaaS cloud computing layer
There is a risk of IaaS cloud computing platform vendor by gaining Source:
Question: What is Cloud Computing?

Answer: Cloud Computing refers to manipulating, configuring, and accessing the hardware and software resources remotely. It offers online data storage, infrastructure, and application. Source:
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 Source:
Question: What is Platform as a Service or PaaS?

Answer: PaaS cloud computing platform is a developer programming platform which is created for the programmer to develop, test, run and manage the applications.

A developer is able to write the application as well as deploy it directly into this layer easily.

PaaS extend and abstract the IaaS layer by removing the hassle of managing the individual virtual machine.

In PaaS cloud computing platform, back end scalability is handled by the cloud service provider and the end user does no Source:
Question: Mention some open source cloud computing platform databases?

Answer: The open source cloud computing platform databases are



c)LucidDB Source:
Question: Explain Virtualization in Cloud Computing?

Answer: Virtualization is a technique, which allows to share a single physical instance of a resource or an application among multiple customers and organizations. It does by assigning a logical name to a physical storage and providing a pointer to that physical resource when demanded. Source:
Question: Mention the name of some large cloud providers and databases?

Answer: Google bigtable

Amazon simpleDB

Cloud based SQL Source:
Question: What are the security aspects provided with cloud?

Answer: Identity management: It authorizes the application services

Access control: permission has to be provided to the users so that they can control the access of another user who is entering into the cloud environment.

Authentication and Authorization: Allows only the authorized and authenticated user only to access the data and applications Source:
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 Source:
Question: What are the technologies working behind the cloud computing platforms making cloud computing flexible, reliable, and usable?

Answer: 1. Virtualization is a technique, which allows to share single physical instance of an application or resource among multiple organizations or tenants (customers). It does this by assigning a logical name to a physical resource and providing a pointer to that physical resource when demanded.

2. Service-Oriented Architecture helps to use applications as a service for other applications regardless the type of vendor, product or technology. Therefore, it is possible to exchange the data betw Source:
Question: What are the advantages and disadvantages of PaaS layer?

Answer: Advantages of PaaS cloud computing layer
1) Simplified Development

Developers can focus on development and innovation without worrying about the infrastructure.
2) Lower risk

No requirements of up-front investment in hardware and software. Developers only need a PC and an internet connection to start building applications.
3) Prebuilt business functionality

Some PaaS vendors also provide already defined business functionality so that users can avoid building everyth Source:
Question: What is the difference in cloud computing and computing for mobiles?

Answer: Mobile computing uses the same concept as cloud computing. Cloud computing becomes active with the data with the help of internet rather than individual device. It provides users with the data which they have to retrieve on demand. In mobile, the applications runs on the remote server and gives user the access for storage and manage. Source:
Question: What are the different deployment models used in Cloud computing?

Answer: Deployment models define the type of access to the cloud. Following are the type of access:

1. Public cloud allows the accessibility of systems and services easily to general public. Eg: Amazon, IBM, Microsoft, Google, Rackspace etc.

2. The Private cloud allows the accessibility of systems and services within the organization. Private cloud is operated only within a particular organization. But it will be managed internally or by third party.

3. The Hybrid cloud is the mixtu Source:
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
- 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 an Source:
Question: Mention what is the difference between elasticity and scalability in cloud computing?

Answer: Scalability is a characteristics of cloud computing through which increasing workload can be handled by increasing in proportion the amount of resource capacity. Whereas, elasticity, is being one of the characteristics that highlights the concept of commissioning and decommissioning of a large amount of resource capacity. Source:
Question: List Cloud Management Tasks?

Answer: Audit System Backups

It is required to audit the backups timely to ensure restoring of randomly selected files of different users. Backups can be performed in following ways:

Backing up files by the company, from on-site computers to the disks that reside within the cloud.

Backing up files by the cloud provider.

It is necessary to know if cloud provider has encrypted the data, who has access to that data and if the backup is taken at different locations then t Source:
Question: Why we need Cloud Computing?

Answer: Any IT company will need server room for database server, mail server, networking, firewalls, routers, modem, switches, QPS (Query Per Second means how much queries or load will be handled by the server) , configurable system, high net speed and the maintenance engineers.

And for this infrastructure company needs to spend high sum of money. In order to solve this Cloud computing came into existence.

1. Cloud computing offers platform independency, as the software is not required t Source:
Question: What is SaaS or Software as a Service?

Answer: SaaS is a software distribution model in which applications are hosted by a cloud service provider and made available to customers over internet. SaaS is also known as "On-Demand Software".

In SaaS, software and associated data are centrally hosted on the cloud server. SaaS is accessed by users using a thin client via a web browser. Source:
Question: What are the different types of service models used in cloud computing?

Answer: Cloud computing is based on service models. These are categorized into three basic service models which are -

Infrastructure-as?a-Service (IaaS)
Platform-as-a-Service (PaaS)
Software-as-a-Service (SaaS)

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