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BCA Cloud Computing Cloudcomputing — practice by topic

Browse 204 questions across 10 Cloudcomputing topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Cloudcomputing topics

Cloud Computing Reference Architecture (28)Cloudsecurity (27)Cloudeconomics (26)Cloudfundamentals (26)Cloudobservability (26)Cloudorchestration (26)Cloudservices (26)Cloud Deployment Models (8)The NIST Definition of Cloud Computing (6)Cloud Service Models (5)

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Encryption at rest primarily protects data:Read the answer and worked solution →The NIST definition gives mobile phones, tablets, laptops and workstations as examples of what?Read the answer and worked solution →Which deployment model does the NIST definition describe as provisioned for open use by the general public?Read the answer and worked solution →Which deployment model is provisioned for exclusive use by a single organization comprising multiple consumers such as business units?Read the answer and worked solution →

Worked practice questions

Encryption at rest primarily protects data:

  1. Only on Sundays
  2. While the user is on a phone call about it
  3. While it is being typed at the keyboard
  4. While it is stored on disk or in a backup, typically using AES or similar block ciphers
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Correct answer: D. While it is stored on disk or in a backup, typically using AES or similar block ciphers

At rest = on disk, protected by block ciphers (often AES-256), with keys managed in a KMS. The other options describe unrelated user behaviour or fiction.

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The NIST definition gives mobile phones, tablets, laptops and workstations as examples of what?

  1. Pooled physical resources
  2. Metered service abstractions
  3. Heterogeneous client platforms
  4. Rapidly elastic capabilities
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Correct answer: C. Heterogeneous client platforms

1. Locate where that list of devices appears. It sits inside the broad network access clause. 2. That clause reads: "Capabilities are available over the network and accessed through standard mechanisms that promote use by heterogeneous thin or thick client platforms (e.g., mobile phones, tablets, laptops, and workstations)." 3. The four devices are therefore illustrating heterogeneous client platforms, both thin and thick. 4. The pooled resources the definition names elsewhere are storage, processing, memory and network bandwidth, which is a different list metering examples are storage, processing, bandwidth and active user accounts. _Source: NIST SP 800-145 "The NIST Definition of Cloud Computing" (Sept 2011), p.2 section 2 "Essential Characteristics"_

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Which deployment model does the NIST definition describe as provisioned for open use by the general public?

  1. Private cloud
  2. Community cloud
  3. Public cloud
  4. Hybrid cloud
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Correct answer: C. Public cloud

1. All four deployment models open with the same phrase, "The cloud infrastructure is provisioned for...", so the difference is in who it is provisioned for. 2. Public cloud is provisioned "for open use by the general public". 3. Private cloud is provisioned "for exclusive use by a single organization", and community cloud "for exclusive use by a specific community of consumers". Both say *exclusive*, which is the opposite of open. 4. Hybrid cloud is not provisioned for a group at all; it is "a composition of two or more distinct cloud infrastructures". _Source: NIST SP 800-145 "The NIST Definition of Cloud Computing" (Sept 2011), p.3 section 2 "Deployment Models"_

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