Cloud Computing Questions

Q:

What is the security aspects provided with cloud?

Answer

Security is one of the major aspects which come with any application and service used by the user. Companies or organizations remain much more concerned with the security provided with the cloud. There are many levels of security which has to be provided within cloud environment such as:


• Identity management: it authorizes the application service or hardware component to be used by authorized users.


• Access control: permissions has to be provided to the users so that they can control the access of other users who are entering the in the cloud environment.


• Authorization and authentication: provision should be made to allow the authorized and authenticated people only to access and change the applications and data.

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Q:

Explain different layers which define cloud architecture

Answer

Cloud computing architecture consists of many layers which help it to be more organized and can be managed from one place. The layers are as follows:


1. Cloud controller or CLC is the top most level in the hirerachy which is used to manage the virtualized resources like servers, network and storage with the user APIs. 


2. Walrus is used for the storage and act as a storage controller to manage the demands of the users. It maintains a scalable approach to control the virtual machine images and user data.


3. Cluster Controller or CC is used to control all the virtual machines for executions the virtual machines are stored on the nodes and manages the virtual networking between Virtual machines and external users.


4. Storage Controller or SC provides a storage area in block form that are dynamically attached by Virtual machines. 


5. Node Controller or NC is at the lowest level and provides the functionality of a hypervisor that controls the VMs activities, which includes execution, management and termination of many instances.

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Subject: Cloud Computing

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Q:

What are the security laws which take care of the data in the cloud?

Answer

The security laws which are implements to secure data in the cloud are as follows:


- Input validation : controls the input data which is being to any system.


- Processing  : control that the data is being processed correctly and completely in an application.


- File : control the data being manipulated in any type of file.


- Output reconciliation : control the data that has to be reconciled from input to output.


- Backup and recovery: control the security breaches logs and the problems which has occurred while creating the back.

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Q:

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).

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Q:

What are some open source cloud computing platform databases?

Answer

Cloud computing platform has various databases that are in support. The open source databases that are developed to support it is as follows:


- MongoDB: is an open source database system which is schema free and document oriented database. It is written in C++ and provides tables and high storage space. 


- CouchDB: is an open source database system based on Apache server and used to store the data efficiently


- LucidDB: is the database made in Java/C++ for data warehousing. It provides features and functionalities to maintain data warehouse.

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Subject: Cloud Computing

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Q:

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.

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2 2029
Q:

How does fault tolerance work in mapreduce?

Answer

In a mapreduce job the master pings each worker periodically. In case a worker does not respond to that system then the system is marked as failed. Even completed tasks are rescheduled because the output was stored in a in a local disk of a worker which failed. Hence mapreduce is able to handle large-scale failures easily by simply restarting a task. The master node always saves itself at checkpoints and in case of any failure it simply restarts from that checkpoint.

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Q:

________ intended to address issues such as bugs and errors within existing software.

A) Fix B) BugFix
C) CodeFix D) HotFix
 
Answer & Explanation Answer: D) HotFix

Explanation:
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Filed Under: Cloud Computing
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