Access time is typically stated in ____ for secondary storage devices and nanoseconds for primary storage devices.A. microseconds B. milliseconds C. nanoseconds D. picoseconds
B. milliseconds
The speed at which data can be moved over a communication channel is called the channel's ____.A. clock speed B. data transfer rate C. access time D. cycle time
B. data transfer rate
Which of the following is not a direct access storage device?A. optical disk B. RAM C. magnetic tape D. magnetic disk
B. RAM
Which of the following statements is not correct?A. Data is written to a linear storage medium in a specific order and can be read back only in that same order. B. Access time for a random access storage device must be a constant. C. Parallel access can also be achieved by subdividing data items and storing the component pieces on multiple storage devices. D. All primary storage devices and disk storage devices are random access devices.
B. Access time for a random access storage device must be a constant.
What type of RAM requires frequent refresh cycles to maintain its data content? A. static B. synchronous C. dynamic D. enhanced
A. static
Software programs permanently stored in a read only memory (ROM) are called ____.A. software B. hardware C. vaporware D. firmware
D. firmware
Average access time can usually be improved by ____ the data content of a disk.A. recharging B. offsetting C. defragmenting D. randomizing
C. defragmenting
The ____ is the communication channel that connects all computer system components.A. bus arbitration unit B. system bus C. cache controller D. peripheral processing unit
B. system bus
If the bus clock rate is 250 MHz, what is the duration of each bus cycle?A. 5 nanoseconds B. 4 nanoseconds C. 2 nanoseconds D. 3 nanoseconds
B. 4 nanoseconds
Computer system components coordinate their activities by sending appropriate signals over the ____.A. interrupt bus B. address bus C. data bus D. control bus
D. control bus
The CPU is always capable of being a(n) ____, thus controlling access to the bus by all other devices in the computer system.A. bus arbitration unit B. bus slave C. peripheral processing unit D. bus master
D. bus master
The operating system normally views any storage device as a(n) ____, thus ignoring the device's physical storage organization.A. peripheral processing unit B. linear address space C. multiple master bus D. device controller
D. device controller
During interrupt processing, register values of a suspended process are stored ____.A. in a cache B. in a linear address space C. in a buffer D. on the stack
D. on the stack
During a(n) ____ operation, one or more register values are copied to the top of the stack.A. pop B. swap C. push D. shift
C. push
The difference between a cache and a buffer is ____.A. buffers are only used for storage device accesses B. buffers are usually much larger than caches C. cache (but not buffer) content is intelligently managed D. data is removed from a cache as it is read
C. cache (but not buffer) content is intelligently managed
To which type of data is lossy compression best suited?A. financial transactions B. audio files C. scientific data D. medical records
B. audio files
An individual display element of a video display surface is called a(n) ____.A. pixel B. point C. bit D. dither
A. pixel
____ execute applications within an operating environment such as Java, a Web browser, or Windows Terminal Services.A. Photosensors B. Video controllers C. Thin clients D. Multimedia controllers
D. Multimedia controllers
A monitor is connected to a(n) ____ which is, in turn, connected to the system bus.A. cache B. channel C. video controller D. DMA controller
C. video controller
The number of refresh cycles per second is normally stated in ____.A. dpi B. pixels C. Hertz D. bytes
C. Hertz
A(n) ____ is a set of rules and conventions for communication.A. communication protocol B. message C. phase D. frequency
A. communication protocol
What modulation type encodes data by varying the magnitude of wave peaks within a carrier wave?A. frequency B. packet C. amplitude D. phase
A. frequency
What type of signal can carry one of an infinite number of messages during one unit of time?A. binary B. analog C. discrete D. digital
D. digital
____ waves are the preferred method of digital data transmission over relatively short distances, for example,on a computer system bus.A. Cosine B. Digital C. Square D. Sine
C. Square
What is the bandwidth (in Hertz) of a channel with a minimum frequency of 1,000 Hertz and maximum frequency of 10,000 Hertz?A. 9,000 B. 5,000 C. 10,000 D. 11,000
A. 9,000
What signal-to-noise ratio level is required for accurate data transmission?A. zero B. negative C. positive D. infinite
C. positive
What type of transmission cable is immune to electromagnetic interference?A. Twisted pair B. coaxial C. Fiber optic D. Category 5
C. Fiber optic
What transmission type uses all of a transmission medium's capacity to implement a single channel?A. baseband B. asynchronous C. broadband D. synchronous
D. synchronous
The probability of incorrectly identifying good data as an error is called ____.A. block checking B. Type II error C. Type I error D. parity checking
B. Type II error
A(n) ____ is a device such as a computer system, printer, or router attached to a network that can send or receive messages.A. datagram B. token C. network node D. Ethernet
C. network node
A network using a physical ____ topology connects all nodes to a central point (e.g., a hub or wiring concentrator).A. star B. bus C. logical D. ring
A. star
Which physical topology type connects each end node to two other end nodes?A. bus B. ring C. cluster D. star
B. ring
Which of the following logical network topologies is most commonly in use when the CSMA/CD media access strategy is employed?A. bus B. ring C. physical D. star
A. bus
A(n) ____ creates a new virtual LAN for each packet and destroys the virtual LAN as soon as the packet has reached its destination.A. switch B. router C. hub D. bridge
A. switch
The ____ model defines a generic set of software and hardware layers for networks and distributed systems.A. Open Systems Interconnection B. Routing Information C. Asynchronous Transfer D. Media Access Control
A. Open Systems Interconnection
The IEEE ____ standards define many parameters of network design and implementation.A. 208 B. 288 C. 802 D. 820
C. 802
Which network type is based on the IEEE 802.3 standard?A. TCP/IP B. SMDS C. Ethernet D. Token Ring
C. Ethernet
The 2007 Nobel Physics prize was given for what area of research that has a direct impact on IS310 Unit 3 material?
man-made climate change Intergovernmental Panel on Climate Change (IPCC) and Albert Arnold (Al) Gore Jr.
How many bytes are required to store an uncompressed 1500 x 1000 true color screen image?
1500*1000 = 1,500,000*3 byte/pixel = 4,500,000 bytes
How does storage capacity growth compare to Moore's Law?
The rate of storage capacity growth is roughly similar to the rate of the increase in transistor count, doubling every 18-24 months with no increase in unit cost.
Why NAT not IPV6? (In your answer explain what each is.)
NAT (Network Address Translation) is the translation of an IP address used within one network to a different IP address known within another network. NAT also conserves on the number of global IP addresses that a company needs and it lets the company use a single IP address in its communication with the world. IPv6 ( Internet Protocol version 6) is an updated version of IPv4, developed to address problems with IPv4 with limited number of node addresses.
Give examples of why long term storage can only be viewed as persistent not permanent.
Data stored on nonvolatile media might be lost because of compatible read/write devices becoming obsolete, which has happened with many older diskette and tape formats technology obsolescence - technology device that long term unable to use
From the class discussions: Why are ergonomically designed I/O devices important to incorporate when purchasing hardware? Give examples of such devices and how they help.
May cause sickness or problems cause by I/O devices such as back pain, eye strain, and carpal tunnel syndrome(CTS). Ex. antiglare monitor that prevent eye strain due to brightness Keyboard that prevent CTS or pain to your hand.
In considerations of costs, capacity and reliability compare RAID levels 0 and 1.
RAID levels 0 and 1 - simple in design, improve performance, require 2 disks, no parity
In considerations of costs, capacity and reliability contrast RAID levels 0 and 1.
RAID level 0 -high risk of data loss, loss in fault tolerance, the failure of just one drive will result in all data in an array being lost, shouldn't be used in mission critical envir. RAID level 1 - increase data reliability & data tolerance, highest system overhead, cost of small writes is twice as expensive than RAID 0, better speed, increase in cost will cause speed increase and capacity increase
