ICT - Information Communication Technology Cloud Computing and Virtualization Questions and Answers — Questions and Answers
Question 1: A company wants to migrate its application development and testing environment to the cloud. They need a service model that provides the operating system, databases, and development tools, allowing their developers to focus solely on writing and deploying applications without managing the underlying hardware. Which cloud service model BEST fits this requirement?
- Infrastructure as a Service (IaaS)
- Software as a Service (SaaS)
- Platform as a Service (PaaS) (Correct answer)
- Function as a Service (FaaS)
Correct answer: Platform as a Service (PaaS)
Platform as a Service (PaaS) provides a complete development and deployment environment in the cloud. It includes the infrastructure (servers, storage, and networking) plus middleware, development tools, business intelligence services, database management systems, and more. This allows developers to focus on the application lifecycle without worrying about managing the underlying infrastructure. IaaS only provides the raw infrastructure, SaaS delivers complete software applications over the internet, and FaaS is a more granular model for running individual functions.
Question 2: A technician needs to set up a virtualized environment for a corporate data center that will host critical production servers. The primary requirements are maximum performance, high security, and direct access to hardware resources for the virtual machines. Which type of hypervisor should be used?
- Type 2 (Hosted)
- Type 1 (Bare-metal) (Correct answer)
- Hybrid Hypervisor
- Container Engine
Correct answer: Type 1 (Bare-metal)
A Type 1 hypervisor, also known as a bare-metal hypervisor, runs directly on the host's physical hardware without a host operating system. This direct access to hardware resources results in better performance, scalability, and security, making it the ideal choice for enterprise data centers and production environments. A Type 2 hypervisor runs as an application on top of a host OS, introducing latency and a larger attack surface, making it more suitable for development and testing.
Question 3: Which of the following is an essential characteristic of cloud computing, as defined by the National Institute of Standards and Technology (NIST), that allows a consumer to provision computing capabilities automatically without requiring human interaction with the service provider?
- Resource Pooling
- Measured Service
- Broad Network Access
- On-demand self-service (Correct answer)
Correct answer: On-demand self-service
According to the NIST definition of cloud computing, 'On-demand self-service' is one of the five essential characteristics. It means that a consumer can unilaterally provision computing capabilities, such as server time and network storage, as needed automatically without requiring human interaction with each service's provider. The other options are also NIST characteristics, but they refer to different aspects: resource pooling (sharing resources among multiple consumers), measured service (metering usage), and broad network access (availability over the network).
Question 4: A financial services company needs to maintain strict control over its sensitive customer data for regulatory compliance. However, they also want to leverage the scalability of a public cloud for their non-sensitive, customer-facing web application, especially during peak trading hours. Which cloud deployment model would be most appropriate for this scenario?
- Public Cloud
- Private Cloud
- Hybrid Cloud (Correct answer)
- Community Cloud
Correct answer: Hybrid Cloud
A Hybrid Cloud model combines a private cloud (or on-premises infrastructure) with a public cloud, allowing data and applications to be shared between them. This approach enables the company to keep sensitive data in a secure private cloud while taking advantage of the public cloud's scalability and cost-effectiveness for less sensitive applications. This strategy, sometimes involving 'cloud bursting,' is ideal for managing fluctuating workloads while maintaining compliance.
Question 5: What is a primary advantage of server virtualization that directly enhances business continuity and disaster recovery capabilities?
- Reduced hardware and energy costs.
- Increased IT team productivity and efficiency.
- Encapsulation of workloads into hardware-independent files. (Correct answer)
- Simplified creation of isolated software testing environments.
Correct answer: Encapsulation of workloads into hardware-independent files.
Server virtualization encapsulates an entire server, including its OS, applications, and data, into a set of files (a virtual machine image). These files are independent of the physical hardware, allowing them to be easily backed up, replicated, and restored to any other compatible physical server. This significantly simplifies and speeds up disaster recovery, as a failed virtual server can be brought back online quickly on different hardware, enhancing business continuity. While cost savings, increased productivity, and test environments are also benefits, encapsulation is the core feature that directly improves disaster recovery.
Question 6: An organization is deploying several lightweight, single-purpose applications. They need a virtualization technology that offers the fastest possible startup times and the highest density of instances on a single host. The applications can all run on the same underlying operating system. Which technology is the BEST choice?
- Type 1 Hypervisors
- Type 2 Hypervisors
- Virtual Machines (VMs)
- Containers (Correct answer)
Correct answer: Containers
Containers are a lightweight form of virtualization that virtualizes the operating system, allowing multiple applications to share the host OS kernel. Because they don't need to boot a full guest OS for each instance, containers have significantly faster startup times and lower resource overhead than virtual machines. This allows for a much higher density of containerized applications to run on a single host, making them ideal for this scenario.
ICT - Information Communication Technology Cloud Computing and Virtualization Questions and Answers
A company wants to migrate its application development and testing environment to the cloud.
They need a service model that provides the operating system, databases, and development tools, allowing their developers to focus solely on writing and deploying applications without managing the underlying hardware.
Which cloud service model BEST fits this requirement?