LEARNING OBJECTIVES 1. To learn the common secondary storage devices and their basic characteristics. 2. To learn the common input devices and their basic characteristics. 3. To learn the common output devices and their basic characteristics. 4. To learn to compare computers by power and use. 22
SECONDARY STORAGE DEVICES These storage devices are also Input/Output devices. 28
Secondary Storage Devices • Secondary Storage § Stores large amounts of data, instructions, and information more permanently than main memory. Devices for secondary storage Magnetic disks SSD Solid State Disks Hybrid: SSD + Magnetic Hard Drive DVD – Digital Video Disks CD - Compact Disks Blu-ray Disks RAID (Redundant Array of Inexpensive Disks) Flash memory 22
Hard Drives (SATA) Hard drives NEWER TECHNOLOGY • SATA § Serial Advanced Technology Attachment § Transfer Rate (Maximum) § 150 MB/S TO 300 MB/S u Capacity (Maximum) u 40 GB to 4. 0 TB u Tera. Byte = 1, 000 billion bytes § Access Time § Price. § $31 to $159 u 6 -12 ms § Number of Drives Supported § One drive per port. § RPM § Revolutions Per Minute § 5400 to 7, 200 (Some, 10, 000) § 2 MB to 64 MB Cache (buffer) 4 TB $159 22
Solid State Drives-SSD (SATA) Characteristics: • Company: San. Disk • Mostly for notebooks. • 32 -60 -120 -240 -1, 000 GB flash memory • 2, 000 hours (228 years) between failure • Access time: 0. 12 milliseconds • Power: 0. 4 to 1. 0 watts • 100 times faster than any hard drive for random access. • 5 times faster that any hard drive for sequential access. • As fast as a magnetic drive spinning at 40, 000 RPM • Uses PATA and SATA • Cost: 159 (120 GB) and $199 (240 GB) • Main advantages: Fast, low failure rate, low power requirement, non-volatile, will replace hard drives in laptops, but can be used in desktops. • LATEST NEWS ON San. Disk Drives
Solid State Drives-SSD (SATA or PATA) Price: Sept 2013 128 GB: $99 256 GB: $179 512 GB: $379 960 GB: $569 Features Available in 128 GB, 256 GB, 512 GB, 960 GB capacities Interface: SATA III Read speed 540 MB/second Write speed 410 MB/second Shock Resistant: 1500 G/0. 5 ms Vibration Resistant: 20 G/10~2000 Hz with 3 Axis Operating Consumption & Power: DC 5 V 2. 75 W MTBF: >2, 500, 000 Hours Data Retention: 5 years at 25°C O/S Support: Linux, Mac OS X®, and Windows 7 & 8 10 Year Warranty Latest SSD: Tiger. Direct
Hybrid Drive (SATA) Hybrid Drive Features both SSD and traditional HD 1 TB Price: $129. 00 Key Features and Benefits • Boots 40 percent faster than traditional 7200 -RPM drives (for overall system performance, that's within 1% of an SSD*) • Cuts costs by 75 percent compared to SSDs by combining solid state and hard drive technologies • Delivers the perfect balance of speed and capacity • Uses Adaptive Memory technology to optimize performance in real time by storing frequently used files and data on the solid state drive component • Ensures compatibility with any operating system or application with a standard 9. 5 mm notebook drive form factor and the characteristics of a traditional 7200 RPM drive • Offers all the benefits of SSD performance with the high capacity, storage, battery life, power consumption and heat generation of a traditional hard drive
Hard Drives (SATA) Four SATA cable connections for connecting drives to Motherboard. 4 drives max. 8 22
USB drives (External) USB External Hard drive • INTERFACE • USB 2. 0 • USB 3. 0. • STORAGE • 80 GB TO 4 TB • TRANSFER RATE • 60 MB/S • PRICE • $159 TO $59 • NEED EXTERNAL TRANSFORMER. • TYPICALLY USED TO BACK UP FILES. 22
USB drives (External) USB External Hard drive • BACKUP WITH NORTON GHOST • GHOST CAN BACKUP INDIVIDUAL FILES OR THE ENTIRE C: DRIVE IMAGE. • If your C: drive completely fails, using Ghost you can copy the complete C: drive image onto the new drive from the external drive that has the image, and go. . Thus, in a few minutes your "back in business. " 22
Flash USB drives (External) FLASH DRIVE (USB) • STORAGE • 4 GB TO 128 GB • USES FLASH MEMORY • IS NON-VOLITLE • TRANSFER RATE • 14 MB/S TO 30 MB/S • PRICE • $15 TO $129 22
Flash SD drive $53. 00 $194. 00 32/ 64 GB Secure Digital (SD) memory card • Great for inserting into SD socket in a laptop and use it as a drive D: • Great as a second drive in laptop. • Uses flash memory technology. • Fits flush into the side of a laptop. 22
DVD Read-Write (DVD-RW) 4. 7 GB DVD – Digital Video Disk DVD SPEEDS: • DVD-R/RW (16 x 8 x 16 x) • DVD-Write 16 x, DVD-Re. Write 8 x, DVD-Read 16 x PRICE: • $45 to $150 Speed multiplier with DVDs: • x = 1. 3 MBps 22
DVD Read-Write (DVD-RW) Smaller Pits, Narrower Track Pitch Inside On the inside, a DVD is totally different. Its pits are half the size of CD pits (0. 4µm vs. 0. 83µm), and it's tracks are spaced about twice as close together (0. 74µm vs. 1. 6µm). See following image. . . 650 -800 MB CD disk 4. 7 GB DVD disk 22
Blu-ray Disc 12 x (Write) 2 x (Re. Write) 6 x (Read) • Encodeing: MPEG-2, MPEG-4, VC-1 • (VC-1: Video Code by Micro. Soft) (MPEG: Motion Picture Experts Group) • Capacity 25 GB (Single Layer) 50 GB (Double Layer) More Information
Blu-ray Disc (BD) Blu-ray Disc (also known as Blu-ray or BD) is an optical disc storage medium. Its main uses are high-definition video and data storage. The disc has the same physical dimensions as standard DVDs and CDs. The name Blu-ray Disc is derived from the blue laser (violet-colored) used to read and write this type of disc. Because of the wavelength (405 nanometres), substantially more data can be stored on a Blu-ray Disc than on the DVD format, which uses a red (650 nm) laser. A two-layer Blu-ray Disc can store 50 gigabytes, almost six times the capacity of a two-layer DVD, or ten and a half times that of a single-layer DVD. The shorter the wavelength, the more data that can be stored in the same amount of space. The wavelength of a blue light laser (Blu-ray) is shorter than the wavelength of a red light laser (DVD).
Input Devices 28
Input Source data automation § Capturing and editing data where the data is originally created and in a form that can be directly input to a computer. 27
POINT OF SALE DEVICE (POS) MAGNETIC STRIP / BARCODE READERS RFID 28
POINT OF SALE DEVICE (POS) MAGNETIC STRIP / BARCODE READERS Apple i. Touch with barcode reader and magstrip reader adapter. Barcode and Magstrip reader • Reads barcodes • Reads Magstrips • Transmits data using Wi. Fi into a network • The i. Touch slides into the scanner unit. • $549 for scanner only. i. Touch sold seperately. 28
POINT OF SALE DEVICE (POS) Self-checkout Register Questions: • Advantages • Disadvantages 28
TOUCH SCREEN In the future, what types of interaction with an information system may be possible for checking in for a flight at an airport? Passenger check-in system at an airport. 28
TEST FORM SCANNER Apperson Print Management test form scanner. • Scanner used in this class • Scans test form results directly into a grading package. 28
KEYBOARD Wireless Keyboard 28
MOUSE/TRACKBALL Mouse Trackball 28
DRAWING TABLET Drawing Tablet 28
TIME CLOCK Each employee’s finger print is stored on the company computer connected to this time clock. The location of the finger print is determined by the employee’s ID number. In other words, the address of the finger print on the hard disk is the employee’s ID number. Questions: • Advantages of the system • Disadvantages of the system Operation: • The employee enters their ID number. The ID number is used to locate the exact location of the finger print for this ID number. • The employee places their finger on the finger print reader. • The system looks for a match between the stored finger print on the Hard Disk and the one being read by the reader. 28
FINGERPRINT SCANNERS Fingerprint Scanner • $32. 00 and up • ID < 1 second 28
FINGERPRINT SCANNERS Say goodbye to password hassles. Now you can log on to your computer and your favorite websites with the touch of your finger, without having to remember all those passwords - simply place your finger on the receiver whenever a password or username is required. Easy-to-use software makes replacing passwords with your fingerprint a breeze. The Registration Wizard helps you register fingerprints for each user. When you first visit a site that requires a password, just touch the Fingerprint Reader with your registered finger, enter your data, and then click OK. When you browse back to that website, you can simply log on with your fingerprint. You can also use the Fingerprint Reader to quickly switch between Windows user accounts without closing programs and files and each user's personal content stays personal. 28
IRIS ID SCANNERS T RITY REPOR MINO 2 min IRIS Identification Scanner • $206. 00 - $1, 300. 00 • Less than 1 seconds to authorize. • The human iris is absolutely unique, even between twins or an individual's right and left eyes. 28
Fingerprint Reader Notebooks Fingerprint Reader 28
Chip Implant in Brain Monkey can control a robotic arm using a chip in its brain. Mind control chip in monkey’s brain 2 min 28
Chip Interacting with Brain cells can be fused with electronic chips so that the chip and the cells interact. Chip meets the brain 3. 3 min cc 28
RFID (Radio Frequency ID) Transponder Reader How RFID works: • The transponder is energized by the reader. The transponder then sends the reader information that is stored in it, such as a product ID code. 28
RFID (Radio Frequency ID) Mobile-Commerce Payment Mechanism with Texas Instrument's RFID technology. 28
RFID (Radio Frequency ID) Best Buy will start using RFID in January or February of 2006 28
RFID (Radio Frequency ID) Corporations, government to track your every move. New book 'SPYCHIPS' sets out disturbing scenario using RFID technology Leading Journal on RFID 28
RFID (Radio Frequency ID) Know this article © 2005 World. Net. Daily. com "Can a microscopic tag be implanted in a person's body to track his every movement? There's actual discussion about that. You will rule on that – mark my words – before your tenure is over. " – Sen. Joseph Biden, to Judge John Roberts at Supreme Court confirmation hearings, Sept. 12, 2005. Imagine a world of no more privacy, where hidden radio frequency scanners will be constantly pointed at you, wirelessly reading microchips embedded in your clothing, shoes, bank cards and even your own flesh. It's the ultimate in "Big Brother, " and according to the explosive new book "SPYCHIPS: How Major Corporations and Government Plan to Track your Every Move with RFID, " companies including Wal-Mart, Target, Gillette, Proctor & Gamble, Kraft, IBM and even the U. S. government have all invested in making such a scenario a reality within the next decade. 28
RFID (Radio Frequency ID) Welcome to the world of Radio Frequency Identification, or RFID, where tiny computer chips smaller than a grain of sand will track everyday objects – and even people – keeping tabs on everything you own and everywhere you go. While it sounds far-fetched and futuristic, it's already here and documented in "SPYCHIPS, " written by Katherine Albrecht and Liz Mc. Intyre. These two privacy advocates have uncovered extraordinarily detailed plans to use this new technology to watch U. S. citizens. Revelations in the book include IBM's blueprint for a "Person Tracking Unit" that scans the RFID tags on unwitting members of the public as they move through retail stores, airports, train stations, elevators, libraries, theaters and even public restrooms. They intend to follow your every move. 28
RFID (Radio Frequency ID) Nokia is developing an RFID-reader cell phone that could be used to scan people and inventory their belongings as they walk past on the street. Bank of America has cooked up a "Crowd Identification Device" to scan RFID tags on the things people are wearing and carrying to pinpoint, identify and bombard them with targeted audio advertising messages. There is even an RFID armband that delivers a dose of paralyzing medication or an electroshock to subdue individuals. These are just a few of the patents and patent applications revealed in "SPYCHIPS" that major corporations and the U. S. government have planned. The book chronicles efforts to keep these plans a secret, revealing the contents of confidential industry documents and outlining plans to "pacify" the public, co -opt public officials and develop spin to ensure the adoption of the RFID infrastructure. 28
RFID (Radio Frequency ID) The book also discusses the industry's more underhanded tactics, like a foiled plot by the Grocery Manufacturers of America to mount a smear campaign against author Katherine Albrecht. As the authors were researching the book, illegal efforts were made by unknown persons to gather intelligence on them, including siphoning telephone records and targeting bank records. Someone even contacted their friends and family to probe for information, the authors say. Hundreds of millions of dollars have already been invested in what global corporations are calling the hottest new technology since the bar code – and billions more are in the balance. Wal-Mart's top suppliers are already on board with RFID tracking, and high-level former government officials like Tommy Thompson and Tom Ridge have joined the boards of major RFID companies. In fact, Thompson, former secretary of health and human services, now sits on the board of the Veri. Chip human implant company and has publicly suggested RFID implants for us all. "Spychips could strip away our last shreds of privacy and usher in a nightmare world of total surveillance – to keep us all on Big Brother's very short leash, " say the authors 28
RFID (Radio Frequency ID) 28
RFID (Radio Frequency ID) Chip yourself Are we crazy? ? ? RFID chips are known to cause deadly cancer in mice, rats, and dogs. 28
Facial Recognition 4 min cc 29
DIGITAL CAMERAS METHODS OF INPUT TO COMPUTER: • USB • Firewire 29
Output Devices 28
Liquid Crystal Display (LCD) Monitor Samsung 912 T Static Contrast Ratio • 19 Inch LCD • 1000 -1 contrast ratio (truer colors) • 250 cd/m 2 (picture brightness) • cd=Standard unit of luminance is candela per square meter (cd/m 2). • candela= one candles luminance on an area of 1 square meter. • 1280 x 1024 pixels (resolution) • 180 degree viewing area • Scanning frequency • Horizontal 30 -81 k. Hz • Vertical 56 -75 k. Hz • $129 to $299 More Info 31
Light Emitting Diode (LED) Monitor $299. 99 Latest technology is LED High Dynamic Contrast Ratio Low power requirement 31
Static vs Dynamic Contrast Ratios Do you ever wonder why the contrast ratios on newer model LCD TV's can vary so much? It's not uncommon for contrast ratios to be 2000: 1 and 25000: 1 on two HDTV's that are otherwise very similar in their features and overall quality. Why is this? There actually two types of contrast ratios and the difference lies in the definitions. Unfortunately not all salespeople and marketers of HDTV's bother to point out which type of contrast ratio is being reported. The first type of contrast ratio, the static contrast ratio, is the ratio of the brightest part of an LCD screen to the darkest part that can be simultaneously displayed on screen. The second type of contrast ratio, the dynamic contrast ratio, is measured by comparing the blackest black of one image to the whitest white of another image at a different time. By measuring the dynamic contrast ratio in such a way that allows for the entire screen to be darker for dark scenes and lighter for light scenes, this allows LCD makers and marketers to claim a larger dynamic contrast ratio. So when you see two otherwise comparable LCD's with contrast ratios of 2000: 1 and 25000: 1, you now know the larger, more impressive looking number is a dynamic contrast ratio, while the smaller one is a static contrast ratio. The most interesting part of this is while dynamic contrast ratios can improve the picture quality for scenes that are predominantly dark or bright, the actual reported contrast ratio can't actually be achieved. So don't get confused. Yes, dynamically-altered brightness is a good HDTV feature, just don't base your buying decision on the massive looking dynamic contrast ratio.
COMPUTER PROJECTORS • 3 - 8 Pounds • $ 850 -$3, 500 31
Laser Printer Typical Characteristics: • 600 to 2, 400 dpi (dots per inch) • 6 to 30 ppm (pages per minute) • $59 to $399 • FAR CHEAPER TO OPERATE THAN INKJETS. 32
Wireless Laser Printer $99. 95 to $149. 95 Brother Wireless Laser Printer 32
Ink. Jet Printer • Ink is infused with electrically charged particles. • Ink is heated, ink bubbles form, cool and collapse, shooting ink droplets out the nozzle toward the paper. • The spray is deflected horizontally and vertically by electrically charged deflection plates. 32
Ink. Jet Printer Canon Pixma i. P 4200 • 600 by 600 dots/inch (black&white) • 9, 600 by 2, 400 dots/inch (color) • $59. 00 -$130 • Color speed: 20 pages/min • USB 2. 0 32
MISCELLANEOUS ITEMS 30
POWER BACKUP Power backup system • Used in case of power failure. • Pictured item runs for 16 minutes • $79 to $269. 00 37
SAMPLE TEST QUESTIONS 1. What item below is true concerning Intel's Core 2 Duo processor? a. It has one processor. b. It has no L 1 cache. c. It does not allow for sharing cache. d. It allows for multi-threaded applications. 57
SAMPLE TEST QUESTIONS 2. Computer memory labeled PC 8400 has a transfer speed of 8. 4 MB/s? a. True b. False 58
SAMPLE TEST QUESTIONS 3. Which type of storage is typically the fastest? a. Hard drives b. DDR 3 c. Cache d. DRAM 59
SAMPLE TEST QUESTIONS 4. If you were to purchase 100 new computers for your company, which interface technology would you want so that you can expand your computers now and in the future? a. PATA b. SATA c. XT d. DMA e. Parallel 60
SAMPLE TEST QUESTIONS 5. Your small business hard drives and you want to create an exact image of what is on those drives on other hard drives. Which product below could you use? a. Mc. Afee Anti-virus b. Norton System Check c. Zone Alarm d. Norton Disk Restore e. Norton Ghost 61
SAMPLE TEST QUESTIONS 6. Your company wants to purchase 50 external hard drives. Which interface would you look for this or next year? a. USB 2. 0 b. USB 3. 0 c. USB 4. 0 d. USB 5. 0 62
SAMPLE TEST QUESTIONS 7. Moore’s law states that chip density will double every a. 14 to 16 months. b. 18 to 24 months. c. 48 to 58 months d. 58 to 78 months. 63
SAMPLE TEST QUESTIONS 8. DVDs store more information than CDs because: a. DVDs have smaller pits. b. DVD’s tracks are spaced closer together. c. DVDs can be recorded on two layers. d. a and b e. a, b, and c 64
SAMPLE TEST QUESTIONS 9. How fast will this DVD recorder rewrite: 4 x 2 x 6 x? a. 2 x b. 4 x c. 6 x d. 2. 6 Million Bytes/Second e. a and d 65
SAMPLE TEST QUESTIONS 10. How fast will this DVD recorder read: 4 x 2 x 6 x? a. 1. 3 Million Bytes/Second b. 2. 6 Million Bytes/Second c. 5. 2 Million Bytes/Second d. 7. 8 Million Bytes/Second e. None of the above 66
SAMPLE TEST QUESTIONS 11. The type of storage drive most likely to replace the magnetic hard drive will be: a. Solid State Drives b. Magnetic Tera. Byte drives c. Optical drive d. Blue Ray Drives e. DVD high definition drives 67
SAMPLE TEST QUESTIONS 12. What is/are characteristic/s of solid state drives. a. Faster access than most magnetic hard drives b. Are not sensitive to vibrations or sudden movements c. Lower power requirements. d. a and b e. a, b, and c 68
SAMPLE TEST QUESTIONS 13. Intel is currently working on a processor that has a lot of cores. Exactly, how many? a. 30 b. 80 c. 160 d. None of the above 69
SAMPLE TEST QUESTIONS 14. Your company wants a computer that is not likely to be shut down due to a disk crash. Which technology would be best to accomplish this goal? a. RAID level-1 b. RAID level-0 c. SATA (150 MB/S transfer rate) d. E-IDE e. USB 2. 0 70
SAMPLE TEST QUESTIONS 15. Which level of RAID allows for both disk mirroring and very fast access? a. Level 0 b. Level 1 c. Level 0+1 71
SAMPLE TEST QUESTIONS 16. You need to replace your old CRT monitors. You plan to purchase LCD monitors. What are some of the things you should you look for? a. High contrast ratios. b. Low cd/m 2 values. c. a and b 72
SAMPLE TEST QUESTIONS 17. Copper traces on a motherboard that allow pulses to travel from one component to another is/are called a: a. route. b. bus. c. wire. d. cable. e. c and d 73
SAMPLE TEST QUESTIONS 18. What is true concerning Level-2 cache? a. It is faster than RAM b. It is located within the processor's silicon. c. It is typically located next to the processor's silicon. d. a and b e. a and c 74
SAMPLE TEST QUESTIONS 19. Iris scanners can detect differences in identical twin’s Irises? a. True b. False 75
SAMPLE TEST QUESTIONS 20. Which type of disc technology can hold the most data? a. Blu-ray b. DVD c. CD Rom 76
SAMPLE TEST QUESTIONS 21. DRAM has very small capacitors that must be constantly recharged in order to continuously store a "1"? a. True b. False 77
SAMPLE TEST QUESTIONS 22. If you need to replace a computer monitor, the latest technology with extremely good contrast ratio and low power requirements applies to which type of monitor? a. LCD (Liquid Crystal Display) b. LED (Light Emitting Diode) c. CRT (Cathode Ray Tube) d. a or c 78
SAMPLE TEST QUESTIONS 23. Which technology is least likely to be around in ten years? a. SATA b. Firewire c. USB d. PCIe 79
SAMPLE TEST QUESTIONS 24. When looking for a new laptop which processor family would be most current? a. i 3, i 5, i 7 b. Intel core 2 duo family c. Intel single core family d. b and c 80
SAMPLE TEST QUESTIONS 25. The i 3 has two cores which are threaded. What is the advantage of threading? a. It allows each core to execute two instructions at the same time. b. It allows each core to execute six instructions at the same time. c. It allows each core to execute three instruction at one time. 81
SAMPLE TEST QUESTIONS 26. The i 3 has two cores and no turbo boost. a. True b. False 82
SAMPLE TEST QUESTIONS 27. The i 5 has turbo boost and two cores. a. True b. False 83
SAMPLE TEST QUESTIONS 28. In general, the i 7 has turbo boost and two or four cores. a. True b. False 84
SAMPLE TEST QUESTIONS 29. Which processors below have cores that are threaded? a. i 3 b. i 5 c. i 7 d. b and c e. a, b, and c 85
SAMPLE TEST QUESTIONS 30. Many current hard drives have terabytes of storage. How many bytes of storage is a terabyte? a. 1, 000 bytes of storage b. 1, 000 billion bits of storage c. 100 million bytes of storage d. 1000 million bytes of storage 86
SAMPLE TEST QUESTIONS 31. How many bytes are in a megabyte? a. 1, 000 b. 1, 000 c. 1, 000, 000 d. 1, 000, 000 87
SAMPLE TEST QUESTIONS 32. How many bits are in one byte? a. 4 b. 8 c. 16 d. 32 88
SAMPLE TEST QUESTIONS 33. Which hard drive will be faster? a. Access time 6 ms, buffer size 64 MB, RPM 10, 000 b. Access time 12 ms, buffer size 32 MB, RPM 7, 200 c. Access time 8 ms, buffer size 16 MB, RPM 5, 400 89
SAMPLE TEST QUESTIONS 35. For what does SATA stand? a. Serial Advanced Technology Attachment b. Serial Adaptive Transfer Attachment c. Serial Access Technology Attachment d. None of the above 90
SAMPLE TEST QUESTIONS 36. Typically, a SSD (Solid State Drive) can read data sequentially up to _______ and write data sequentially up to _______. a. 60 MB/s, 30 MB/s b. 540 MB/s, 410 MB/s c. 1, 024 MB/s, 135 MB/s d. 2, 048 MB/s, 260 MB/s 91
SAMPLE TEST QUESTIONS 37. The latest storage drives are call hybrid. These drives combine what two technologies? a. SSD and magnetic hard drives b. DVD and Blu-ray c. Blu-ray and SSD d. DVD and SSD e. None of the above 92
SAMPLE TEST QUESTIONS 38. The Hybrid drive boots about how much faster than the typical 7, 200 RPM hard drive? a. ~100 percent b. ~90 percent c. ~60 percent d. ~40 percent e. ~10 percent 93
SAMPLE TEST QUESTIONS 39. In most laptop computers there is no room for a second hard drive. Most users want some convenient way to back up their files without having to connect an external device such as a flash drive each time they use their computer. A good solution would be to: Place a 32 GB or 64 GB Secure Digital (SD) memory card into the Secure Digital slot on the laptop. a. True b. False 94
SAMPLE TEST QUESTIONS 40. A single layer and double layer Blu-ray disk can hold a maximum of how may bytes? a. 25 GB, 50 GB b. 10 GB, 20 GB c. 100 GB, 200 GB d. 1, 000 GB, 2, 000 GB 95
SAMPLE TEST QUESTIONS 41. An Apple i. Touch can be used with an adapter for processing a sales transaction? a. True b. False 96
SAMPLE TEST QUESTIONS 42. According to Dr. Scanlan it will be possible to control electronic devices simply by thinking about what you want the device to do. a. True b. False 97
SAMPLE TEST QUESTIONS 43. For this class, test froms are scanned by an Apperson Print Management scanner, and the score is automatically entered into a grading package? a. True b. False 98
SAMPLE TEST QUESTIONS 45. What is true concerning the finger print time clock presented in your notes? a. It is a very, very slow device. b. It uses the employee ID as an address for where the finger print is stored on a hard disk. c. The employee first enters their employee ID then places their finger on the reader. d. b and c e. a, b, and c 99
SAMPLE TEST QUESTIONS 46. There has been a merger of human brain cells and computer chips so that the cells interact with the electronics of these chips. a. True b. False 100
SAMPLE TEST QUESTIONS 47. If you are in charge of purchasing a large number of laptops for your company, a company where most employees travel by airlines, you would most likely purchase: a. computers with hybrid disks. b. computers with magnetic hard drives c. computers with solid state drives. d. computers with a lot of memory. 101
SAMPLE TEST QUESTIONS 48. If you are in charge of purchasing a large number of laptops for your company, a company where most employees travel by airlines, you would most likely purchase: a. computers with hybrid disks. b. computers with magnetic hard drives c. computers with solid state drives. d. computers with a lot of memory. 102
SAMPLE TEST QUESTIONS 49. How many hard drives would be necessary for RAID 0+1? a. Two b. Three c. Four d. Five e. Six 103
SAMPLE TEST QUESTIONS 50. In blu-ray, the “x” multiplier stands for how many bytes per second transfer rate? (12 x 4 x 8 x). This rate is for Write, Rewrite, and Read. a. 4. 5 MB/s b. 9. 0 MB/s c. 18 MB/s d. 36 MB/s 104
SAMPLE TEST QUESTIONS 105
Скачать презентацию LEARNING OBJECTIVES 1 To learn the common secondary
ae13adeb95cf81f461882630589c18dd.ppt