1 / 67

Technology In Action

Technology In Action. Midterm Exam Study Guide. The Exam Sample Exam Questions Review Lab Exercises 3 and 4 Technology in Focuses 3 and 4 Sound-bytes 6 to 10 Chapters 6 to 10. The Midterm Exam. When Thursday, April 3, 2008 5:30 – 6:45pm MSB 115 15 % of your final grade Covers

kenley
Télécharger la présentation

Technology In Action

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Technology In Action

  2. Midterm Exam Study Guide • The Exam • Sample Exam Questions • Review • Lab Exercises 3 and 4 • Technology in Focuses 3 and 4 • Sound-bytes 6 to 10 • Chapters 6 to 10

  3. The Midterm Exam • When • Thursday, April 3, 2008 • 5:30 – 6:45pm • MSB 115 • 15 % of your final grade • Covers • Chapters 6 to 10 • Sound-bytes 6 to 10 • Technology in Focus 3 and 4 • Lab exercises 3 and 4 • This is an open-notes exam. All in-class hand-outs are allowed. • Writing on your notes is ok! • You may not use a textbook, a computer, or any electronic device.

  4. Sample Exam Questions 1 Multiple-choice Question • ____________ storage refers to storage that loses its data when the power is turned off. A. Permanent B. Volatile C. Virtual D. Nonvolatile Answer: B Reference: Chapter 6 - Evaluating RAM

  5. Sample Exam Questions 2 True/false Question • Laptop computers are also known as tablet computers • Answer: False (notebook computers) • Reference: Chapter 8 - Notebooks

  6. Sample Exam Questions 3 Matching Question • Match the following acronyms to their descriptions : A. SATA B. ALU C. VRAM D. IrDA E. DIMM • _____ type of memory module • _____ memory generally used for graphics display • _____ port for wireless data transmission • _____ type of hard disk drive interface • _____ CPU component that performs mathematical operations • Answer: E, C, D, A, B • Reference: Chapter 6

  7. Lab Exercises • Lab exercise 3 • Creating a basic web page • Investigating HTML • Terms related to the Internet and HTML • Lab exercise 4 • Using a word processing software (Microsoft Word) • Investigating how file compression works • Terms related to mass storage devices and memory

  8. Technology in Focuses • Technology in Focus 3: Computing Alternatives • Open-source software • Application software alternatives – OpenOffice • Operating alternatives – Linux • Hardware alternatives – MAC, DIY

  9. Technology in Focuses • Technology in Focus 4: Protecting Your Computer and Backing up Your Data • Physically protecting your computer • Keeping cell phones and PDAs safe • Protecting your computer from unauthorized access • Access privileges and password protection • Updating your software • Backing up your data

  10. Sound-bytes • Hard Disk Anatomy Interactive • Installing a Home Network • Tablet and Notebook Tour • Memory Hierarchy Interactive • Programming for End Users: Macros

  11. Technology In Action Chapter 6 Evaluating Your System: Understanding and Assessing Hardware

  12. Chapter Topics • To buy or upgrade? • Evaluating your system: • CPU • RAM • Storage devices • Video output • Sound systems • Computer ports • System reliability

  13. Chapter 6 Summary Questions • How can I determine whether I should upgrade my existing computer or buy a new one? • You need to conduct a system evaluationby look at computer’s subsystems • CPU • Memory • The storage subsystem • The video subsystem • The audio subsystem • Your computer’s ports • Then, determine if it’s economically practical to upgrade or buy a new one

  14. Chapter 6 Summary Questions • What does the CPU do and how can I evaluate its performance? • Processes instructions, performs calculations, manages the flow of information through a computer system • To evaluate its performance • Look at the clock speed • The ability to process multimedia instructions and handle audio and video processing commands • The power consumption • Mulitcore capability option • Usually a newer generation CPU have a lot of improvement over the previous generation

  15. Chapter 6 Summary Questions • How does memory work and how can I evaluate how much memory I need? • Random access memory (RAM)is your computer’s temporary storage space • A short-term memory--it remembers everything that the computer needs to process the data into information, such as inputted data and software instructions, but only while the computer is on • To determine how much RAM is needed you must look at the memory requirements of each program you’ll run and add them up

  16. Chapter 6 Summary Questions • What are the computer’s main storage devices and how can I evaluate whether they match my needs? • Hard disks (nonvolatile storage) are devices for permanent storage of instructions and data when the computer is powered off • The hard disk should have enough space for all installed programs ,data, and virtual memory

  17. Chapter 6 Summary Questions • What components affect the output of video and how can I evaluate whether they are meeting my needs? • How video is displayed depends on two components • Video card and monitor • A more powerful card is required if you plan to use your computer for graphics-intense games and multimedia. • The monitor size, resolution, refresh rate, and color reproduction are all affect how well the monitor performs.

  18. Chapter 6 Summary Questions • What components affect the quality of sound and how can I evaluate whether they are meeting my needs? • Your computer’s sound depends on your speakers and a sound card • An upgrade sound card enables the computer to produce 3-D or surround sound and additional ports for audio equipments

  19. Chapter 6 Summary Questions • What are the ports available on desktop computers and how can I determine what ports I need? • A port is an interface through which peripheral devices are connected to your computer • There are many kinds of ports available such as serial, parallel, USB, Firewire, Ethernet, S-Video, DVI, Bluetooth, IrDA, MIDI, HDMI, and eSATA

  20. Chapter 6 Summary Questions • How can I ensure the reliability of my system? • There are several procedures you can follow to ensure your system performs reliably • Clean out your Startup folder • Make sure you delete only programs you know for sure are unnecessary • Clear out unnecessary files to free-up hard drive space • Run an antispyware/antivirus program as well as an anti-adware program • Run the Disk Defragmenter utility once in a while to compact your hard drive

  21. Technology In Action Chapter 7 Networking and Security: Connecting Computers and Keeping Them Safe from Hackers and Viruses

  22. Chapter Topics • Networking fundamentals • Network architecture • Network components • Peer-to-peer networks • Computer threats • Computer safeguards • Computer viruses

  23. Chapter 7 Summary Questions • What is a network and what are the advantages of setting one up? • A computer network is simply two or more computers connected together via software and hardware so they can communicate • The main functions for most networks • to facilitate information sharing • allow users to share peripherals and Internet connectivity

  24. Chapter 7 Summary Questions • What is the difference between a client/server network and a peer-to-peer network? • Network architectures are classified according to the way in which they are controlled and the distance between their nodes • There are two main ways a network can be controlled • A peer-to-peer network is the most common example of a locally controlled network • The most common type of centrally controlled network is a client/server network

  25. Chapter 7 Summary Questions • What are the main components of every network? • In order to move data from one computer to another, four components are required • Transmission media • Network adapters that translate the computer’s signal to a network message • Navigation devices that decide how data traffic comes and goes • Network software that allows the software to run

  26. Chapter 7 Summary Questions • What are the most common home networks? • Ethernet and wireless network • The major difference in these networks is the transmission media by which the nodes are connected

  27. Chapter 7 Summary Questions • What are power-line networks? • Power-line networks use the existing electrical wiring in your home to connect the nodes in the network • Any electrical outlet provides a network connection • The original power line networks had a maximum data transfer rate of 14 Mbps • New standards provide for data transfer rates approaching 200 Mbps

  28. Chapter 7 Summary Questions • What are phoneline networks? • Phoneline networks move data through the network using conventional phone lines rather than power lines • Any phone jack in a house provides a network connection • Phoneline networks have a maximum data transfer rate of 10 Mbps

  29. Chapter 7 Summary Questions • What are Ethernet networks? • Ethernet networks use the Ethernet protocol as the means by which the nodes on the network communicate • Requires that you install an adapter to each computer or peripheral you want to connect to the network • Most computers come with Ethernet adapters preinstalled as network interface cards (NICs)

  30. Chapter 7 Summary Questions • What are wireless networks? • A wireless network uses radio waves instead of wires or cables as its transmission media • Each node on a wireless network requires a wireless network adapter • These adapters are either built-in or inserted an added-on card into an expansion slot or an open USB port

  31. Chapter 7 Summary Questions • How can hackers attack a network and what harm can they cause? • A hacker is defined as anyone who breaks into a computer system (whether an individual computer or a network) unlawfully • A hacker can use software to break into a computer connected to the Internet • Once gaining access to the computer, the hacker can steal, damage or destroy information, or use the computer to attack other computers

  32. Chapter 7 Summary Questions • How are home wireless networks vulnerable? • Wireless network range doesn’t stop at the property line • A hacker can intercept and decode information from your transmissions that may allow him to bypass your firewall • Others may steal your bandwidth and crimes can be committed through your network

  33. Chapter 7 Summary Questions • What is a firewall and how does it keep my computer safe from hackers? • Firewalls are software programs or hardware devices designed to keep computers safe from hackers • By using a firewall, you can close off open logical ports to invaders and potentially make your computer invisible to other computers on the Internet

  34. Chapter 7 Summary Questions • From which types of viruses do I need to protect my computer? • Boot-sector viruses • Logic bombs • Time bombs • Worms • Script viruses • Macro viruses • E-mail viruses • Encryption viruses • Trojan Horses

  35. Chapter 7 Summary Questions • What can I do to protect my computer from viruses? • Use your common sense • Install antivirus software

  36. Technology In Action Chapter 8 Mobile Computing: Keeping Your Data on Hand

  37. Topics • Advantages and limitations of mobile computing • Mobile computing devices • Pagers, cell phones, PDAs, and portable media players • Synchronizing mobile devices with computers • Tablet PCs • Notebooks

  38. Chapter 8 Summary Questions • What are the advantages and limitations of mobile computing? • Advantages • Convenience • Boost productivity • Communicate with others anywhere • Access to electronic information • Limitations • Expensive • Short battery life • Small screen display • Slow Internet speed

  39. Chapter 8 Summary Questions • What are the various mobile computing devices? • Paging devices • Cell phones • MP3 players • Personal digital assistants (PDAs) • Tablet PCs • Laptops

  40. Chapter 8 Summary Questions • What can pagers do? • A paging device (pager) is a small wireless device that allows you to receive and sometimes send numeric (and sometimes text) messages on a small display screen

  41. Chapter 8 Summary Questions • How do cell phone components resemble a traditional computer and how do cell phones work? • Cell phones have the same components as a computer: a processor, memory, and input and output devices • When you speak to the phone • Sound enters as a sound wave • Analog sound waves, then, are converted to digital signals • The compressed digital signals are transmitted to the cellular network then to the phone

  42. Chapter 8 Summary Questions • What can I carry in a portable media player and how does it store data? • Portable media players (PMPs) are small portable devices (such as an iPod) that enable playing of MP3 files anywhere • Some devices can play video files • Some MP3 players allow you to add additional removable flash memory cards

  43. Chapter 8 Summary Questions • For what can I use a PDA and what internal components and features does it have? • A personal digital assistant (PDA) is a small device that allows you to carry digital information • Often called palm computers or handhelds • PDAs are about the size of your hand • Most PDAs come with a standard collection of software such as a to-do list, contacts manager, calendar, and software applications

  44. Chapter 8 Summary Questions • How can I synchronize my mobile devices with my desktop computer? • PDA files can be transferred to a desktop using • Flash card readers • Cradles • Wireless transfers: • IrDA • Bluetooth

  45. Chapter 8 Summary Questions • What is a tablet PC? • A tablet PC is a portable computer that is lightweight, features advanced handwriting recognition, and can be rotated into a clipboard style • Its monitor can be used either in a traditional laptop mode or in “tablet mode,” much like an electronic clipboard • Tablet PCs also can be connected to a full-size keyboard and monitor

  46. Chapter 8 Summary Questions • How powerful are notebooks and how do they compare to desktop computers? • The most powerful mobile computing solution is a notebookcomputer • Comparing to desktop computers, notebooks are usually less powerful than the desktops

  47. Technology in Action Chapter 9 Behind the Scenes: A Closer Look at System Hardware

  48. Chapter Topics • Computer switches • Binary number system • Inside the CPU • Cache memory • Types of RAM • Computer buses • Creating faster CPUs

  49. Chapter 9 Summary Questions • What is a switch and how does it work in a computer? • Electronicswitches are devices inside the computer that can be flipped between these two states: 1 or 0, on or off • Modern computers understand only two states of existence: on and off • Computers represent these two possibilities (or states) using the digits 1 and 0

  50. Chapter 9 Summary Questions • What is the binary number system and what role does it play in computer system? • Computers describe a number as powers of 2 because each switch can be in one of two positions: on or off • This numbering system is referred to as the binary number system • To process data into information, computers need to work in binary language

More Related