77 Questions
What effect does adding more CPU cores to cloud servers have on performance variation?
Increases performance variation due to multi-tenancy
What is the main concern related to multi-tenancy of resources?
Ensuring equal performance for co-resident VMs
Why do identical benchmarks run on co-resident VMs not perform equally?
Resource contention due to sharing the same server
What could running many idle operating system instances potentially lead to?
Significant overhead for some workloads due to resource contention
What is the main feature of elasticity in cloud computing?
Automated ability to transparently scale resources
In what way does cloud scalability differ from traditional infrastructure scalability?
Cloud scalability is based on runtime conditions, while traditional scaling is predetermined
What is the role of cloud brokers?
Intermediary between cloud consumers and cloud providers
Which characteristic of cloud computing involves dynamically assigning IT resources based on demand?
Elasticity
Which factor can impose a significant overhead on certain workloads when many idle operating system instances are running?
Resource contention among instances
What is the primary goal of a multi-tenant model in cloud computing?
Share resources amongst multiple users to increase utilization
What is a potential downside of running several idle OS instances on the same server?
Increased risk of resource contention and overhead
What is the responsibility of a cloud provider?
Maintaining cloud services
Which cloud characteristic involves measuring and billing users based on their usage?
Measured usage
Who are the cloud resource administrators?
Individuals who maintain cloud services
Which role conducts independent assessments of cloud environments?
Cloud auditor
What issue can arise when implementing a single tenant model in cloud computing?
Resource underutilization
What is the main purpose of multi-tenancy in cloud computing?
Maximize resource sharing efficiency
What does a cloud auditor ensure in a cloud environment?
Ensuring security, privacy, and performance
Who may use a cloud provider to provide a cloud service?
Cloud service owner
What does ubiquitous access mean in the context of cloud services?
"Widely accessible" cloud services
What is the function of cloud carriers in the cloud ecosystem?
Facilitate network connectivity between cloud consumers and providers
Which organization is responsible for fulfilling SLAs for cloud services?
Cloud provider
In which scenario would a cloud provider 'resell' IT resources from other cloud providers?
When consuming cloud services
Who are the individuals responsible for providing and maintaining cloud services?
'Cloud resource' administrators
Why is an application agnostic threshold considered non-ideal?
It may not accurately reflect the specific needs of an application.
What is one purpose of measuring the usage of IT resources on a cloud platform?
To track and bill for the actual resource consumption.
In what ways can cloud platform measurements be used other than for billing purposes?
To support auto-scaling based on specific metrics.
What is an example of a time-based granularity for measuring IT resource usage?
Hour
Which metric can be used for throughput-based measurements on a cloud platform?
Data transfer rate (MB/sec)
How does resiliency in a cloud environment contribute to system reliability?
By providing distributed redundancy across physical locations.
Why are historical models important for load prediction in cloud computing?
They help in optimizing cloud footprint by analyzing past trends.
How does AWS EC2 Scaling Example demonstrate adaptability in cloud services?
By adjusting resources based on predicted demand changes.
Which cloud delivery model provides raw 'IT' resources like hardware, network, and containers on demand?
Infrastructure as a Service (IaaS)
Which cloud deployment model leverages economies of scale within a specific community?
Community Cloud
Which cloud service abstracts nearly all server infrastructure management from the user?
Software as a Service (SaaS)
What does 'cloud bursting' refer to in the context of cloud computing?
Scaling beyond one cloud when resource requirements exceed local limitations
Which cloud model allows the cloud consumer to manage resources in bundles and specifies cloud infrastructures using JSON/YAML?
Infrastructure as a Service (IaaS)
Which cloud deployment model typically involves aggregating two or more clouds together and can be public-public or private-private?
Hybrid Cloud
Which type of cloud provides predefined, ready-to-use hosting environments and obscures infrastructure from end users?
Platform as a Service (PaaS)
What distinguishes a community cloud from other types of clouds?
Specialized cloud built and shared by a particular community to leverage economies of scale
What is the main advantage of a Storage Area Network (SAN) compared to local storage on servers?
Allows for easier and immediate scalability of storage
Which protocol is considered a cheaper alternative to Fibre Channel in a Storage Area Network (SAN)?
Fibre Channel over Ethernet (FCoE)
What is the purpose of a 'datastore' in the context of virtualized storage?
It is the storage location where the Virtual Disks of a VM are stored
Which file system is utilized by VMware for managing virtualized storage?
VMFS
What is the purpose of the 'Fabric Layer' in a Storage Area Network (SAN)?
It contains the physical equipment and cabling of the SAN
What is the main benefit of a Storage Area Network (SAN) compared to local server storage?
Ability to be located off-site
What is the purpose of the 'Host Layer' in a Storage Area Network (SAN)?
It grants access to files for users
What is the primary purpose of the SOAP envelope in a SOAP API request?
To modify the underlying HTTP content with SOAP request requirements
Which of the following SOAP standards is responsible for specifying security measures like using unique identifiers called tokens?
Web Services Security (WS-Security)
What is the primary purpose of the Web Services Description Language (WSDL) in the context of SOAP web services?
To describe the scope and function of SOAP web services
Which of the following SOAP standards is responsible for standardizing error handling in SOAP messaging?
WS-ReliableMessaging
What is the primary format of the response returned by a SOAP API?
XML documents
Which of the following SOAP standards is responsible for requiring the inclusion of routing information as metadata?
Web Services Addressing (WS-Addressing)
What is the primary characteristic of SOAP that defines rigid communication rules?
It has several associated standards that control every aspect of the data exchange
What is the main purpose of desktop virtualization?
To provide computing resources for mobile workers without the need for hardware
Which type of virtual network allows VMs to communicate on a private network set up on the host computer, without having translated IP addresses to connect to the external network?
Host-only Network
What is the main purpose of using virtualized applications?
To create a packaged virtual app that contains the program and system requirements, and deliver it to the end-user
What is the main strategy behind 'Convergence' in the context of the provided text?
Maintaining applications running on the hardware-based data center
Which type of virtual network allows VMs to use an IP translated from the host's IP (using a NAT device) and communicate on a private network set up on the host computer?
NAT
What is the main purpose of a Bridged Network in the context of virtual networks?
To allow VMs to communicate on a private network set up on the host computer, without having translated IP addresses to connect to the external network
What is the main purpose of the 'Containment' strategy mentioned in the context of 'Convergence'?
To maintain applications running on the hardware-based data center
What is the main advantage of REST over SOAP in modern application design?
REST offers greater scalability and flexibility, aligning with modern architectural patterns.
When might it be preferable to use SOAP over REST?
When integrating or extending legacy systems that already have SOAP APIs.
Which type of APIs are better suited for REST, according to the text?
Public APIs with lower security requirements and a demand for greater flexibility.
What is a potential drawback of using SOAP compared to REST?
SOAP requires an additional layer of WS-Security, introducing communication overheads.
Which statement about SOAP and REST is true, based on the given information?
REST supports HTTPS without additional overheads, unlike SOAP.
What type of APIs may benefit from the tighter security measures of SOAP?
Private APIs for internal enterprise requirements with high security needs.
Which statement accurately compares the reliability of SOAP and REST?
SOAP is more reliable than REST due to its built-in error handling logic.
What is the primary benefit of using SOAP over REST APIs for applications that require high data integrity?
SOAP has built-in compliance for ACID (atomicity, consistency, isolation, and durability) properties
How does GraphQL differ from RESTful APIs in terms of data retrieval?
GraphQL provides a single aggregated endpoint, while RESTful APIs require multiple endpoint calls
Which of the following is a key advantage of using SOAP over REST APIs for applications that require high data integrity?
SOAP has built-in compliance for ACID (atomicity, consistency, isolation, and durability) properties
What is the main difference between REST APIs and GraphQL in terms of data retrieval?
REST APIs require the client to call multiple endpoints to obtain separate data, while GraphQL provides a single aggregated endpoint
Which of the following is a key advantage of using GraphQL over RESTful APIs?
GraphQL allows clients to request only the data they need, rather than retrieving an entire dataset
What is the main reason SOAP may be better suited for applications that require high data integrity?
SOAP has built-in compliance for ACID (atomicity, consistency, isolation, and durability) properties
How does the use of SOAP APIs differ from REST APIs in terms of enforcing data integrity?
REST APIs require additional software modules to enforce state at the server or database level, while SOAP APIs have built-in support for ACID properties
What is the primary advantage of using GraphQL over RESTful APIs for data retrieval?
GraphQL allows clients to request only the data they need, rather than retrieving an entire dataset from multiple RESTful API endpoints
Which of the following is a key benefit of using SOAP APIs over REST APIs for applications that require high data integrity?
SOAP has built-in compliance for ACID (atomicity, consistency, isolation, and durability) properties
Explore the concept of multi-tenancy in cloud computing, understanding what is shared and what is isolated. Learn about resource contention arising from multi-tenancy and the challenges faced in ensuring equal performance for co-resident virtual machines on a single cloud server.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
