Cloud Computing Week 2 Assignment Answer
Cloud Computing Week 2 Assignment Answer
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1. Para-virtualization is best described as:
A. Running an unmodified guest OS on top of a hypervisor with full CPU trapping.
B. Modifying the guest OS to use hypervisor-aware interfaces for certain privileged operations.
C. Emulating hardware in software so guests don’t need any changes.
D. Running containers that share the host kernel.
Answer : b
2. Which statement about a community cloud is MOST accurate?
A. Owned and operated by a single organization for its exclusive use.
B. Shared infrastructure among several organizations with similar compliance/regulatory needs.
C. A public cloud account with extra IAM roles.
D. Always the most cost-effective option for small startups.
Answer : b
3. When an organization considers using an outsourced private cloud (i.e., a private cloud hosted/operated by a third party), which of the following should be explicitly considered?
(i) Network dependency and SLAs
(i Risks from multi-tenancy / co-residency
(iii) Legal/regulatory/compliance implications of where data is hosted
- A. Only (i)
- B. (i) and (ii) only
- C. (i) and (iii) only
- D. (i), (ii) and (iii
Answer : d
4. When processing very large XML files in a memory-constrained environment, and where the
application needs explicit control over the parsing flow, which XML parser API is MOST
appropriate?
A. DOM (loads the entire XML document into memory as a tree structure)
B. SAX (push-based, event-driven parsing with minimal memory usage but limited control)
C. StAX (pull-based, event-driven parsing offering low memory usage with explicit control)
D. All are equally suitable depending on developer preference
Answer : c
5. A hypervisor with hardware-assisted virtualization shows 40% CPU usage while VMs report only
15% utilization. What explains the 25% gap?
A. The hypervisor isn’t using hardware extensions; it’s relying on binary translation.
B. Context switching, memory management, and I/O emulation overhead normal in virtualized environments
C. Unmodified OS cannot fully utilize hardware virtualization.
D. This indicates efficient resource overcommitment.
Answer : b
6. Which statement clarifies “Hypervisor,” “Virtual Machine Monitor,” and “Cluster Manager”?
A. All four terms are synonymous.
B. Hypervisor and Virtual Machine Monitor are synonymous; Virtual Machine Manager adds orchestration; Cluster Manager manages physical machines.
C. Hypervisor = Type 1 only; Virtual Machine Monitor = Type 2 only.
D. They refer to different layers in a multi-tier virtualization stack.
Answer : b
7. Speed and flexibility are disadvantages of para-virtualization.
A. True
B. False
Answer : b
8. Which mechanism was specifically designed as a registry/discovery approach for web services?
A. SMS
В. HTTP (as a generic transfer protocol)
C. SMTP
D. UDDI (Universal Description, Discovery, and Integration)
Answer : d
9. Which of the following problems are effectively addressed by traditional web services, and which
are NOT?
(i) Passing through firewalls using standard HTTP/HTTPS
ii) Enabling interoperability across different programming languages and operating systems
(i) Ultra-low-latency, real-time inter-service communication
(iv) Service discovery through registries like UDDI
- A. Only (i) and (ii) are addressed
- B. (i), (ii), and (iv) are addressed; (ii) is NOT addressed
- C. Only (ii) is addressed
- D. All are addressed
Answer : b
10. Service Oriented Architecture (SOA) models relationships primarily among:
A. Two entities (a service provider and a requestor) only
B. Two entities (a service provider and a broker) only
C. Three entities (a service provider, a service requestor, and a broker/registry)
D. Three entities (a service provider, a service requestor, and a hypervisor)
Answer : c
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