FINAL 451 QUIZES (NOT QUIZ 9)

A standard x86 Operating System needs to have direct access to hardware and must execute its privileged instructions in Ring ___. a. -1 b. 0 c. 3 d. 1

b.

Cloud computing is device-independent because... a. Users only consume the amount resources they actually want. b. resources can be accessed from any type of computer on the Internet. c. the usage model is based around what users want to achieve, rather than specific SW and HW d. users do not have to pay any fixed costs

b.

In ____ a file system (that is used to retrieve a file from disk) is located on a computer accessing the file. a. NAS b. SAN c. RAID d. All the above

b.

In a _________ hosting category of IaaS, customer's applications share other customers' infrastructure. a. private b. cloud c. dedicated d. shared

b.

Using a browser, you develop and run your ecommerce website and application on a supplier's server that runs Java-based programming tools. That's an example of ... a. SaaS b. PaaS c. IaaS d. none of the above

b.

What is the most efficient category of IaaS in terms of cost and resource usage? a. private hosting b. cloud hosting c. hybrid hosting d. dedicated hosting

b.

What is the name of the software embedded with the hypervisor that allows virtual machines to send and receive traffic through their virtual NICs? a. VMM b. virtual switch c. external hardware switch d. physical NIC

b.

Which of the following RAID levels does not provide fault-tolerance? a. RAID 1 b. RAID 0 c. RAID 5 d. RAID 6

b.

Which virtualization architecture is less efficient/consumes more resources on a computer? a. Hypervisor b. Hosted c. Bare-metal d. all are equally efficient

b.

Who is responsible for providing and managing security for the infrastructure and physical hosts in cloud computing? a. A company's internal IT department b. A cloud provider c. A company software developer d. All the above

b.

__________________ is when a virtual machine simulates a real physical host and allows an operating system to run without being modified. a. Virtual networking b. Transparent (or full) virtualization c. Hosted virtualization d. Paravirtualization

b.

iSCSI is used for a. NAS b. DAS c. RAID d. SAN

d.

A user accessing a cloud supplier's payroll application is an example of... a. SaaS b. PaaS c. IaaS d. none of the above

a.

Cloud computing is dynamically scalable because... a. users only consume the amount resources they actually want. b. resources can be accessed from any type of computer on the Internet. c. the usage model is based around what users want to achieve, rather than specific SW and HW d. users do not have to pay any fixed costs

a.

Which of the following is NOT an example of cloud computing? a. A user accessing his email account on the corporate email server b. A user creating a Facebook application c. A user accessing a Yahoo email account d. A user accessing a supplier's virtual server to test an application

a.

Which of the following is NOT true about a server using DAS? a. The server offers high speed block-level access to network clients. b. The server can make the data on the storage device available to the clients on the network. c. The server communicates with the storage device using a block interface. d. The server can use file-level protocol (e.g. NFS, CIFS) for "sharing" data with clients.

a.

Which of the following statements is true? a. The fact that cloud computing has no fixed costs makes it more attractive to small companies b. The fact that cloud computing has no fixed costs makes it more attractive to large companies c. The fact that cloud computing has no variable costs makes it more attractive to small companies d. The fact that cloud computing has no variable costs makes it more attractive to large companies

a.

An operating system that runs virtualization software as an application is referred to as... a. Hypervisor b. Guest c. Host d. VMM

c.

Cloud computing is task centric because... a. users only consume the amount resources they actually want. b. resources can be accessed from any type of computer on the Internet. c. the usage model is based around what users want to achieve, rather than specific SW and HW d. users do not have to pay any fixed costs

c.

Hardware-assisted virtualization refers to... a. Modifying an operating system to include extended set of instructions. b. Running hypervisor directly on top of hardware. c. Modifying a CPU to include extended set of instructions. d. Using hardware drivers in the hypervisor.

c.

Software RAID processing is handled by... a. Disc drives b. Disk controller c. Computer operating system d. SCSI

c.

What is the name of the software layer that provides physical resources abstraction and allows virtual machine creation? a. supervisor b. host c. hypervisor d. guest

c.

What is virtual infrastructure? a. A thin layer of software that resides between a VM and hardware, allowing VMs to interact with the hardware. b. A file that is created to simulate a stand-alone computer with an operating system and hardware. c. A software suite that allows dynamic mapping of compute, storage, and network resources to VMs and business applications. d. The ability to combine multiple hard drives to act as a single logical drive.

c.

Which RAID level provides both fault-tolerance and improved performance? a. RAID 0 b. RAID 1 c. RAID 5 d. All the above

c.

Which of the following is a reason NOT to use cloud-based service offerings? a. Demand for the service is very volatile with significant ups and downs b. An organization does not have much capital to invest c. Regulatory compliance forbids the outsourcing of data storage and processing d. An organization is growing rapidly

c.

You pay a supplier an hourly fee to rent a virtual server for the purpose of installing and testing your new application. That's an example of... a. SaaS b. PaaS c. IaaS d. none of the above

c.

Which of the following is an example of virtualization? a. SAN b. VLAN c. RAID d. all the above

d.

Which of the following is true about local file systems? a. They provide abstract file view to users and applications. b. They organize where data is placed on storage devices. c. They store and retrieve blocks of data to/from storage devices. d. All the above are true.

d.

Cloud computing is charged on a usage basis which means... a. users only consume the amount resources they actually want. b. resources can be accessed from any type of computer on the Internet. c. the usage model is based around what users want to achieve, rather than specific SW and HW d. users do not have to pay any fixed costs

d.

Fibre Channel Protocol (FCP) is used to encapsulate... a. RAID b. client-server file requests c. TCP/IP d. SCSI commands

d.

How is disk mirroring different from disk duplexing? a. less disk controllers are used in duplexing b. more disks are used in duplexing c. less disks are used in duplexing d. more disk controllers are used in duplexing

d.

Paravirtualization refers to the process of... a. Allowing each guest operating systems run unmodified in isolation. b. Allowing each host operating system run unmodified in isolation. c. Modifying a host operating system. d. Modifying a guest operating system.

d.

RAID 1 configuration a. stripes data across multiple drives with an additional drive dedicated to parity b. stripes data and parity across multiple drives c. stripes data and provides no parity d. mirrors data across 2 drives

d.

Spreading data from one source (one block) across multiple disks is: a. Redundancy b. Switching c. Mirroring d. Striping

d.

The ability to install and run multiple operating systems concurrently and independently on a single physical machine is called.... a. Network virtualization. b. SAN. c. Storage virtualization. d. Server virtualization.

d.

What is a VM? a. It is an OS that runs on top of a hypervisor. b. It is a thin layer of software that provides a level of abstraction between hardware and virtual machines. c. It is an OS that has been modified to run on top of a hypervisor. d. It is a tightly isolated software container with an OS and applications inside.

d.

What is the difference between a standard virtual switch and a distributed virtual switch? a. A distributed VS exists on a single host, while a standard VS extends its ports and traffic management across multiple hosts. b. A standard VS only allows VMs on the same host to interact with each other, while a distributed VS allows VMs to interact with the other hosts on the network. c. A standard VS is implemented as a software solution, while a distributed VS is a set of separate hardware switches. d. A standard VS exists on a single host, while a distributed VS extends its ports and traffic management across multiple hosts.

d.

What network storage technology offers high-speed block-level network access? a. NAS b. NFS c. RAID d. SAN

d.

What technology transfers file-level data over the network? a. SAN b. RAID c. iSCSI d. NAS

d.

Which of the following is NOT a technique that exists for handling privileged instructions to virtualize x86 CPU architecture? a. Hardware-assisted virtualization b. Binary Translation c. Paravirtualization d. VMM

d.

Which of the following is NOT an advantage of cloud computing over traditional data center? a. pay-per-use resources b. accessible from most devices c. promotes collaboration d. faster access

d.

Which of the following is NOT an advantage of virtualization? a. consolidation of resources. b. isolation of virtual machines. c. portable virtual machines. d. applications run faster.

d.

Which of the following is NOT true about network file systems? a. They use file-level access b. They are application layer services c. They allow transparent access to files for network users d. They use block-level access

d.

Which of the following is an area of concern/risk of cloud computing? a. sensitive data can be compromised b. dependence on a reliable Internet connection c. availability of services depends on cloud provider d. all the above

d.

iSCSI is encapsulated in... a. SCSI b. RAID c. Fibre Channel d. TCP/IP

d.