Cloud Computing Overview Quiz

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Questions and Answers

What is the main characteristic of a public cloud?

Made available to the general public (correct)

Composition of two or more clouds

Used for Cloud Bursting

Accessible to authorized clients only

In cloud computing, what is the purpose of a hybrid cloud?

Composition of two or more clouds

Resource quota management

Load balancing between clouds (correct)

Virtual workspace abstraction

What is the role of a hypervisor in virtualization?

Intercepting and emulating instructions from VMs (correct)

Execution environment abstraction

Dynamic availability to clients

Management of virtual machines

Which technology enables multiple virtual machines to run on a single physical machine?

Para-virtualization Signup and view all the answers

What does a virtualized stack in a data center consist of?

Hypervisor Hardware Signup and view all the answers

How are cloud and virtualization technologies related?

Virtualization enables efficient use of physical resources by creating virtual instances Signup and view all the answers

What are some advantages of virtual machines mentioned in the text?

Ability to run more operating systems than physically available Signup and view all the answers

Why is cloud-sourcing becoming important according to the text?

Due to rapid scalability and incremental cost Signup and view all the answers

What are some concerns related to cloud-sourcing mentioned in the text?

Issues related to privacy and security Signup and view all the answers

Why are several large Web companies now offering cloud storage services as per the text?

Because they have excess data storage capacity Signup and view all the answers

Which of the following is not mentioned as an advantage of using virtual machines in the text?

Faster internet browsing Signup and view all the answers

What is one of the concerns raised about cloud-sourcing in the text besides privacy and security?

Lack of control regarding data and service parameters Signup and view all the answers

What is the main focus of Cloud Security?

Identity and Access Management Signup and view all the answers

Which term refers to a field of computing science that studies distributed systems?

Distributed Computing Signup and view all the answers

What is a key characteristic of a Distributed System?

Each entity has its own local memory Signup and view all the answers

Which computing model involves multiple computational entities communicating through message passing?

Distributed Computing Signup and view all the answers

What is the primary focus of Infrastructure Security in Cloud Computing?

Securing the physical cloud data centers Signup and view all the answers

What differentiates Centralized Computing from Distributed Computing?

Centralized Computing uses shared memory, while Distributed Computing has autonomous entities with local memory. Signup and view all the answers

Study Notes

Cloud Computing

Public cloud: cloud infrastructure made available to the general public, e.g., Google Doc, Spreadsheet
Hybrid cloud: composition of two or more clouds (private, community, or public), e.g., Cloud Bursting for load balancing between clouds

Virtualization and Virtual Workspaces

Virtual Workspaces: abstraction of an execution environment, dynamically available to authorized clients using well-defined protocols
Resource quota: e.g., CPU, memory share
Software configuration: e.g., OS
Implement on Virtual Machines (VMs): abstraction of a physical host machine, hypervisor intercepts and emulates instructions from VMs, and allows management of VMs
Examples of VM software: VMware, Xen, KVM

Virtual Machines

VM technology allows multiple virtual machines to run on a single physical machine
Guest OS: e.g., Linux, NetBSD, Windows
Hypervisor: e.g., Xen, VMware Virtual Machine Monitor (VMM)

Advantages of Virtual Machines

Run operating systems where the physical hardware is unavailable
Easier to create new machines, backup machines, etc.
Software testing using “clean” installs of operating systems and software
Emulate more machines than are physically available
Timeshare lightly loaded systems on one host
Debug problems (suspend and resume the problem machine)
Easy migration of virtual machines (shutdown needed or not)
Run legacy systems

Cloud-Sourcing

Importance: using high-scale/low-cost providers, any time/place access via web browser, rapid scalability, incremental cost and load sharing
Concerns: performance, reliability, and SLAs, control of data, and service parameters, application features and choices, interaction between Cloud providers, no standard API, privacy, security, compliance, trust

Cloud Storage

Large Web companies exploiting excess data storage capacity for hire
Allows data stored remotely to be temporarily cached on devices

Cloud Security

Infrastructure Security
Data security and Storage
Identity and Access Management
Access Control, Trust, Reputation, Risk

Trends in Computing

Distributed Computing
Grid Computing
Cluster Computing
Utility Computing
Cloud Computing
Fog Computing

Distributed Computing

Field of computing science that studies distributed systems
Use of distributed systems to solve computational problems
Distributed system: autonomous computational entities, each with its own local memory, communicating with each other by message passing

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Description

Test your knowledge on cloud computing concepts such as public cloud, hybrid cloud, and virtual workspaces. Learn about different cloud infrastructures and their applications in the technological landscape.