Multi-Tenancy of Resources in Cloud Computing
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Questions and Answers

What effect does adding more CPU cores to cloud servers have on performance variation?

  • Increases performance variation due to multi-tenancy (correct)
  • Improves the automated scaling mechanism
  • Reduces the threshold for scaling based on runtime conditions
  • Decreases resource contention among idle instances

    • What is the main concern related to multi-tenancy of resources?

  • Minimizing resource contention among idle instances
  • Ensuring equal performance for co-resident VMs (correct)
  • Automated scaling based on runtime conditions
  • Optimizing cloud server CPU core utilization

    • Why do identical benchmarks run on co-resident VMs not perform equally?

  • Threshold-based scaling criteria not being met
  • Resource contention due to sharing the same server (correct)
  • Automated ability of cloud to transparently scale resources
  • Application-agnostic scaling mechanisms

    • What could running many idle operating system instances potentially lead to?

    <p>Significant overhead for some workloads due to resource contention (C)</p> Signup and view all the answers

    What is the main feature of elasticity in cloud computing?

    <p>Automated ability to transparently scale resources (C)</p> Signup and view all the answers

    In what way does cloud scalability differ from traditional infrastructure scalability?

    <p>Cloud scalability is based on runtime conditions, while traditional scaling is predetermined (C)</p> Signup and view all the answers

    What is the role of cloud brokers?

    <p>Intermediary between cloud consumers and cloud providers (B)</p> Signup and view all the answers

    Which characteristic of cloud computing involves dynamically assigning IT resources based on demand?

    <p>Elasticity (B)</p> Signup and view all the answers

    Which factor can impose a significant overhead on certain workloads when many idle operating system instances are running?

    <p>Resource contention among instances (C)</p> Signup and view all the answers

    What is the primary goal of a multi-tenant model in cloud computing?

    <p>Share resources amongst multiple users to increase utilization (B)</p> Signup and view all the answers

    What is a potential downside of running several idle OS instances on the same server?

    <p>Increased risk of resource contention and overhead (A)</p> Signup and view all the answers

    What is the responsibility of a cloud provider?

    <p>Maintaining cloud services (D)</p> Signup and view all the answers

    Which cloud characteristic involves measuring and billing users based on their usage?

    <p>Measured usage (B)</p> Signup and view all the answers

    Who are the cloud resource administrators?

    <p>Individuals who maintain cloud services (A)</p> Signup and view all the answers

    Which role conducts independent assessments of cloud environments?

    <p>Cloud auditor (B)</p> Signup and view all the answers

    What issue can arise when implementing a single tenant model in cloud computing?

    <p>Resource underutilization (D)</p> Signup and view all the answers

    What is the main purpose of multi-tenancy in cloud computing?

    <p>Maximize resource sharing efficiency (C)</p> Signup and view all the answers

    What does a cloud auditor ensure in a cloud environment?

    <p>Ensuring security, privacy, and performance (D)</p> Signup and view all the answers

    Who may use a cloud provider to provide a cloud service?

    <p>Cloud service owner (A)</p> Signup and view all the answers

    What does ubiquitous access mean in the context of cloud services?

    <p>&quot;Widely accessible&quot; cloud services (C)</p> Signup and view all the answers

    What is the function of cloud carriers in the cloud ecosystem?

    <p>Facilitate network connectivity between cloud consumers and providers (D)</p> Signup and view all the answers

    Which organization is responsible for fulfilling SLAs for cloud services?

    <p>Cloud provider (B)</p> Signup and view all the answers

    In which scenario would a cloud provider 'resell' IT resources from other cloud providers?

    <p>When consuming cloud services (B)</p> Signup and view all the answers

    Who are the individuals responsible for providing and maintaining cloud services?

    <p>'Cloud resource' administrators (C)</p> Signup and view all the answers

    Why is an application agnostic threshold considered non-ideal?

    <p>It may not accurately reflect the specific needs of an application. (A)</p> Signup and view all the answers

    What is one purpose of measuring the usage of IT resources on a cloud platform?

    <p>To track and bill for the actual resource consumption. (A)</p> Signup and view all the answers

    In what ways can cloud platform measurements be used other than for billing purposes?

    <p>To support auto-scaling based on specific metrics. (D)</p> Signup and view all the answers

    What is an example of a time-based granularity for measuring IT resource usage?

    <p>Hour (A)</p> Signup and view all the answers

    Which metric can be used for throughput-based measurements on a cloud platform?

    <p>Data transfer rate (MB/sec) (A)</p> Signup and view all the answers

    How does resiliency in a cloud environment contribute to system reliability?

    <p>By providing distributed redundancy across physical locations. (B)</p> Signup and view all the answers

    Why are historical models important for load prediction in cloud computing?

    <p>They help in optimizing cloud footprint by analyzing past trends. (A)</p> Signup and view all the answers

    How does AWS EC2 Scaling Example demonstrate adaptability in cloud services?

    <p>By adjusting resources based on predicted demand changes. (C)</p> Signup and view all the answers

    Which cloud delivery model provides raw 'IT' resources like hardware, network, and containers on demand?

    <p>Infrastructure as a Service (IaaS) (B)</p> Signup and view all the answers

    Which cloud deployment model leverages economies of scale within a specific community?

    <p>Community Cloud (D)</p> Signup and view all the answers

    Which cloud service abstracts nearly all server infrastructure management from the user?

    <p>Software as a Service (SaaS) (D)</p> Signup and view all the answers

    What does 'cloud bursting' refer to in the context of cloud computing?

    <p>Scaling beyond one cloud when resource requirements exceed local limitations (A)</p> Signup and view all the answers

    Which cloud model allows the cloud consumer to manage resources in bundles and specifies cloud infrastructures using JSON/YAML?

    <p>Infrastructure as a Service (IaaS) (A)</p> Signup and view all the answers

    Which cloud deployment model typically involves aggregating two or more clouds together and can be public-public or private-private?

    <p>Hybrid Cloud (B)</p> Signup and view all the answers

    Which type of cloud provides predefined, ready-to-use hosting environments and obscures infrastructure from end users?

    <p>Platform as a Service (PaaS) (D)</p> Signup and view all the answers

    What distinguishes a community cloud from other types of clouds?

    <p>Specialized cloud built and shared by a particular community to leverage economies of scale (D)</p> Signup and view all the answers

    What is the main advantage of a Storage Area Network (SAN) compared to local storage on servers?

    <p>Allows for easier and immediate scalability of storage (A)</p> Signup and view all the answers

    Which protocol is considered a cheaper alternative to Fibre Channel in a Storage Area Network (SAN)?

    <p>Fibre Channel over Ethernet (FCoE) (D)</p> Signup and view all the answers

    What is the purpose of a 'datastore' in the context of virtualized storage?

    <p>It is the storage location where the Virtual Disks of a VM are stored (B)</p> Signup and view all the answers

    Which file system is utilized by VMware for managing virtualized storage?

    <p>VMFS (C)</p> Signup and view all the answers

    What is the purpose of the 'Fabric Layer' in a Storage Area Network (SAN)?

    <p>It contains the physical equipment and cabling of the SAN (A)</p> Signup and view all the answers

    What is the main benefit of a Storage Area Network (SAN) compared to local server storage?

    <p>Ability to be located off-site (C)</p> Signup and view all the answers

    What is the purpose of the 'Host Layer' in a Storage Area Network (SAN)?

    <p>It grants access to files for users (C)</p> Signup and view all the answers

    What is the primary purpose of the SOAP envelope in a SOAP API request?

    <p>To modify the underlying HTTP content with SOAP request requirements (A)</p> Signup and view all the answers

    Which of the following SOAP standards is responsible for specifying security measures like using unique identifiers called tokens?

    <p>Web Services Security (WS-Security) (C)</p> Signup and view all the answers

    What is the primary purpose of the Web Services Description Language (WSDL) in the context of SOAP web services?

    <p>To describe the scope and function of SOAP web services (D)</p> Signup and view all the answers

    Which of the following SOAP standards is responsible for standardizing error handling in SOAP messaging?

    <p>WS-ReliableMessaging (D)</p> Signup and view all the answers

    What is the primary format of the response returned by a SOAP API?

    <p>XML documents (D)</p> Signup and view all the answers

    Which of the following SOAP standards is responsible for requiring the inclusion of routing information as metadata?

    <p>Web Services Addressing (WS-Addressing) (C)</p> Signup and view all the answers

    What is the primary characteristic of SOAP that defines rigid communication rules?

    <p>It has several associated standards that control every aspect of the data exchange (A)</p> Signup and view all the answers

    What is the main purpose of desktop virtualization?

    <p>To provide computing resources for mobile workers without the need for hardware (B)</p> Signup and view all the answers

    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?

    <p>Host-only Network (C)</p> Signup and view all the answers

    What is the main purpose of using virtualized applications?

    <p>To create a packaged virtual app that contains the program and system requirements, and deliver it to the end-user (B)</p> Signup and view all the answers

    What is the main strategy behind 'Convergence' in the context of the provided text?

    <p>Maintaining applications running on the hardware-based data center (D)</p> Signup and view all the answers

    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?

    <p>NAT (C)</p> Signup and view all the answers

    What is the main purpose of a Bridged Network in the context of virtual networks?

    <p>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 (A)</p> Signup and view all the answers

    What is the main purpose of the 'Containment' strategy mentioned in the context of 'Convergence'?

    <p>To maintain applications running on the hardware-based data center (C)</p> Signup and view all the answers

    What is the main advantage of REST over SOAP in modern application design?

    <p>REST offers greater scalability and flexibility, aligning with modern architectural patterns. (D)</p> Signup and view all the answers

    When might it be preferable to use SOAP over REST?

    <p>When integrating or extending legacy systems that already have SOAP APIs. (C)</p> Signup and view all the answers

    Which type of APIs are better suited for REST, according to the text?

    <p>Public APIs with lower security requirements and a demand for greater flexibility. (A)</p> Signup and view all the answers

    What is a potential drawback of using SOAP compared to REST?

    <p>SOAP requires an additional layer of WS-Security, introducing communication overheads. (A)</p> Signup and view all the answers

    Which statement about SOAP and REST is true, based on the given information?

    <p>REST supports HTTPS without additional overheads, unlike SOAP. (B)</p> Signup and view all the answers

    What type of APIs may benefit from the tighter security measures of SOAP?

    <p>Private APIs for internal enterprise requirements with high security needs. (B)</p> Signup and view all the answers

    Which statement accurately compares the reliability of SOAP and REST?

    <p>SOAP is more reliable than REST due to its built-in error handling logic. (A)</p> Signup and view all the answers

    What is the primary benefit of using SOAP over REST APIs for applications that require high data integrity?

    <p>SOAP has built-in compliance for ACID (atomicity, consistency, isolation, and durability) properties (C)</p> Signup and view all the answers

    How does GraphQL differ from RESTful APIs in terms of data retrieval?

    <p>GraphQL provides a single aggregated endpoint, while RESTful APIs require multiple endpoint calls (C)</p> Signup and view all the answers

    Which of the following is a key advantage of using SOAP over REST APIs for applications that require high data integrity?

    <p>SOAP has built-in compliance for ACID (atomicity, consistency, isolation, and durability) properties (D)</p> Signup and view all the answers

    What is the main difference between REST APIs and GraphQL in terms of data retrieval?

    <p>REST APIs require the client to call multiple endpoints to obtain separate data, while GraphQL provides a single aggregated endpoint (B)</p> Signup and view all the answers

    Which of the following is a key advantage of using GraphQL over RESTful APIs?

    <p>GraphQL allows clients to request only the data they need, rather than retrieving an entire dataset (A)</p> Signup and view all the answers

    What is the main reason SOAP may be better suited for applications that require high data integrity?

    <p>SOAP has built-in compliance for ACID (atomicity, consistency, isolation, and durability) properties (D)</p> Signup and view all the answers

    How does the use of SOAP APIs differ from REST APIs in terms of enforcing data integrity?

    <p>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 (C)</p> Signup and view all the answers

    What is the primary advantage of using GraphQL over RESTful APIs for data retrieval?

    <p>GraphQL allows clients to request only the data they need, rather than retrieving an entire dataset from multiple RESTful API endpoints (B)</p> Signup and view all the answers

    Which of the following is a key benefit of using SOAP APIs over REST APIs for applications that require high data integrity?

    <p>SOAP has built-in compliance for ACID (atomicity, consistency, isolation, and durability) properties (A)</p> Signup and view all the answers

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