IT Cloud Computing & Virtualization 1 — Questions and Answers
Question 1: Which cloud service model provides virtualized computing resources over the internet, including servers, storage, and networking, without requiring the customer to manage underlying hardware?
- Software as a Service (SaaS)
- Infrastructure as a Service (IaaS) (Correct answer)
- Platform as a Service (PaaS)
- Function as a Service (FaaS)
Correct answer: Infrastructure as a Service (IaaS)
IaaS provides virtualized hardware resources such as servers, storage, and networking infrastructure, allowing customers to manage operating systems and applications while the provider handles the physical hardware.
Question 2: What term describes the ability of a cloud environment to automatically increase or decrease computing resources based on current demand?
- Load balancing
- Fault tolerance
- Elasticity (Correct answer)
- High availability
Correct answer: Elasticity
Elasticity refers to the cloud's ability to dynamically provision and de-provision resources automatically in response to workload changes.
Question 3: Which type of hypervisor runs directly on the physical hardware without requiring a host operating system?
- Type 2 hypervisor
- Type 1 hypervisor (Correct answer)
- Container runtime
- Paravirtualization engine
Correct answer: Type 1 hypervisor
A Type 1 (bare-metal) hypervisor runs directly on host hardware and manages guest operating systems without needing an underlying OS, making it more efficient for enterprise virtualization.
Question 4: In a cloud deployment model, which option allows an organization to use a mix of on-premises private infrastructure and public cloud services?
- Community cloud
- Hybrid cloud (Correct answer)
- Multi-cloud
- Federated cloud
Correct answer: Hybrid cloud
A hybrid cloud combines private on-premises infrastructure with public cloud services, allowing data and applications to move between the two environments.
Question 5: What is the primary advantage of using virtual machines (VMs) compared to physical servers in a data center?
- VMs always run faster than physical servers
- VMs eliminate the need for network connectivity
- VMs allow multiple isolated OS instances to run on a single physical host (Correct answer)
- VMs provide dedicated hardware resources to each application
Correct answer: VMs allow multiple isolated OS instances to run on a single physical host
Virtual machines use a hypervisor to allow multiple isolated operating system instances to share the resources of a single physical server, improving hardware utilization and flexibility.
Question 6: Which cloud storage concept ensures that data is automatically replicated across multiple geographic locations to prevent data loss?
- Data deduplication
- Geo-redundancy (Correct answer)
- Object versioning
- Cold storage tiering
Correct answer: Geo-redundancy
Geo-redundancy replicates data across multiple geographic regions so that if one data center fails, the data remains accessible from another location.
Question 7: What does the term 'multi-tenancy' mean in a cloud computing environment?
- Multiple administrators managing a single cloud account
- A single cloud instance serving multiple customers with isolated data (Correct answer)
- Deploying an application across multiple cloud providers simultaneously
- Using multiple virtual machines for a single workload
Correct answer: A single cloud instance serving multiple customers with isolated data
Multi-tenancy means a single cloud infrastructure instance serves multiple customers (tenants), with each tenant's data logically isolated from others.
IT Cloud Computing & Virtualization 1
Which cloud service model provides virtualized computing resources over the internet, including servers, storage, and networking, without requiring the customer to manage underlying hardware?