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Flashcards

CET FINAL EXAM PREP

Chahat Sharma Inglês 110 flashcards

Flashcards do conjunto (110)

  1. 1What is the function of the power supply?to convert AC power into a lower voltage DC power
  2. 2What type of current comes from the wall socketAlternating current @ 120 Volts
  3. 3Which term refers to the technique of increasing the speed of a processor from the specified value of its manufacturer.Overclocking
  4. 4A customer needs to purchase a new power supply for a computer. What must be considered when selecting an appropriate power supply?The power supply has sufficient wattage to support all components inside the computer
  5. 5A student wishes to buy a computer suitable for game playing. What CPU speed would be appropriate for game playing?3 GHz
  6. 6what are the size and layout of a case calledform factor
  7. 7what are the basic form factors for computer cases?Desktop, tower
  8. 8what does a power supply do?converts AC power coming from the wall into DC power
  9. 9What is a molex connector used to connect to?an optical drive or hard drive
  10. 10What is a bus?electrical pathway
  11. 11What is the chipsetintegrated circuits attached to the motherboard that control how system hardware interacts with the CPU and motherboard
  12. 12What are the two components that make up the chipset?northbridge and southbridge
  13. 13What does ZIF refer to?The amount of force needed to install a CPU into the motherboard socket or slot
  14. 14How is the power of a CPU measuredBy the speed and amount of data it can process
  15. 15What is overclocking?A technique used to make a processor work at a faster speed than its original specifications
  16. 16What causes heat in the computer?The flow of current within the components
  17. 17What is stored in ROMBasic instructions for booting the computer and loading the operating system
  18. 18What is meant by volatile memory?The contents are erased when the computer is powered off
  19. 19What is SODIMM used for?Laptops, printers, or devices where conserving space is desirable
  20. 20What does DDR technologyDoubles the maximum bandwidth of SDRAM
  21. 21When do memory errors occurWhen the data is not stored correctly in the RAM chips
  22. 22What does RAID stand for?Redundant Array of Independent Disks
  23. 23What are three common video portsS-video, VGA, DVI
  24. 24What is FireWireA high speed, hot swappable interface that connects peripheral devices to a computer
  25. 25What is another name for a network port?RJ45
  26. 26What is a hardware device that can be used to control more than one computer using a single keyboard, monitor and mouseKVM Switch(Keyboard,Video,Mouse)
  27. 27What causes a touch screen to work?Pressure-sensitive transparent panel
  28. 28What is a pixelPicture element; tiny dots that comprise a screen
  29. 29What is used in SSD drives to store data that replaces magnetic plattersStatic RAM chips
  30. 30What size processor data bus do current processors have?32 bit or 64 bit
  31. 31How many devices can a single USB port in a computer support127
  32. 32What are four common interfaces that a technician should be familiar withFirewire, Parallel, Serial and SCSI
  33. 33What are two common uses of CAx specialized systems?CAD and CAM
  34. 34What are signs that RAM needs to be replaced on a computer?Locks up or error messages
  35. 35what are the four basic units of electricity and what do they measure?Amperes - measures current
    Volts - measures voltage
    Ohms - measures resistance
    Watts - measures electric power
  36. 36State Ohm's LawV = IR
  37. 37What two factors should be considered when purchasing external storage?compatibility
    functionality
  38. 38What is the approximate data storage capacity of a CD700 MB
  39. 39What is the approximate data storage capacity of a DVD4.7 GB on a single layer disc and 8.5 GB on a dual layer disc
  40. 40what are two advantages and one disadvantage of using a Solid State Drive1. Operates in any environment
    2. reduces the start up time
  41. 41name two characteristics of a safe workplaceclean and well-lighted
  42. 42List 3 basic safety precautions when working on a computersecure loose clothing like sleeves or neck ties
    ground work benches
    make sure you turn off the device and unplug it from the power source
  43. 43Why should you never exchange power cords with different types of laptops?Using different adapters on different types of laptops might end up damaging the laptops
  44. 44How many classifications of fire extinguishers are there? Why are there different kinds?There are 4 different classifications of fire extinguishers. Different types (classes) for different types of fires
  45. 45What is an electrical spike and what can cause oneAN electrical spike is when the power exceeds 100% of its normal voltage, a power fluctuation might cause this or overworking a device
  46. 46What does UPS stand foruninterruptible power supply
  47. 47what is another name for hazardous materialstoxic waste
  48. 48why can batteries be harmful to the environmentbc they contain rare earth metals
  49. 49why must you handle CRT monitors with carebc they have a high voltage
  50. 50what are the 4 categories of hardware toolscleaning tools
    diagnostic tools
    ESD tools
    hardware tools
  51. 51what does an antivirus program doworks to identify and undo any harm a virus may have done
  52. 52what can be installed without the knowledge or consent of the usermalware
  53. 53How do you clean dusty componentsby blowing compressed air
    using a soft lint-free cloth
  54. 54how do you clean the contacts on componentsuse isopropyl 90% concentration or higher
  55. 55voltageforce that moves electrons through a circuit
  56. 56currentmovement of electrons
  57. 57blackoutcomplete loss of AC power
  58. 58brownoutreduced voltage level of AC power
  59. 59MSDSfact sheet that summarizes information about material identification, including hazardous ingredients
  60. 60two ESD toolsantistatic wrist strap and the antistatic mat
  61. 61digital multimeterdevice that can take many types of measurements
  62. 62loopback adaptertests the basic functionality of computer ports
  63. 63FDISKprepares a hard drive to store information
  64. 64Format toolcreates and deletes partitions on a hard drive
  65. 65antistatic wrist strapto equalize the electrical charge between you and the equipment
  66. 66self-groundingtouching a bare metal part of a computer case
  67. 67power supply testerchecks whether the computer power supply is working properly
  68. 68power surgedramatic increase in voltage
  69. 69ESDelectrostatic discharge
  70. 70EMIelectromagnetic interference
  71. 71RFIRadio Frequency Interference
  72. 72peripherala component that can be added to a laptop to enhance capabilities
  73. 73CPU throttlingalter the CPU Clock speed in order to save power
  74. 74infraredlow power, short range wireless technology
  75. 75SODIMMRAM that is specific for laptops
  76. 76APMcode that fixes security problems or issues with hardware or software
  77. 77mini-PClnetwork card commonly used by older laptops
  78. 78inverterconverts DC power to the higher voltage AC power that is required by the backlight.
  79. 79Card Bus Standardolder open standard interface to connect to peripheral devices
  80. 80DC jackreceives power from a laptops AC/DC power converter and supplies the power to the system board.
  81. 81capacitiveconsists of a glass screen coated with a conductor
  82. 82proximity sensorturns off touchscreen when phone is up to your ear and turns on when you pull it away
  83. 83SSDsolid state drive
  84. 84Source CodeDeveloper's programming code
  85. 85System BarThe bottom area of an android screen that helps navigate apps
  86. 86accelerometerdetermines how a device is being held
  87. 87GSMwireless mobile telecommunications network
  88. 88Tetheringa mobile device can connect to another mobile device or computer to share a network connections
  89. 89remote wipedeletes all data from a device and returns to its factory state
  90. 90POP3protocol used to download email
  91. 91GPSnavigational system that uses at least 4 satellites to calculate its position
  92. 92name 4 laptop input deviceskeyboard
    webcam
    mic
    USB
  93. 93name a difference between a laptop CPU and a desktop CPUa laptop CPU is more compact than a desktop CPU
  94. 94name 4 properties you can use / change with laptop function keys?display settings
    brightness
    volume
    wi-fi connectivity
  95. 95how many devices can a bluetooth wireless device support7, but 3-4 is the practical limit
  96. 96what time frame is used for good preventative maintenance schedulingmonthly
  97. 97what may be a possible cause of random system crashes or freezestoo many programs/tasks running at once
  98. 98what may be a possible cause of ghosting images on a laptop screenoverheating or working laptop
  99. 99name two manufacturers of android devicessamsung and google
  100. 100which two components are field replaceable in most mobile devicesmemory card
    sim card
  101. 101what are two advantages of using flash memory storage in mobile devicesreliable and more efficient
  102. 102what platform allows users to change code and programming on their devicesandroid
  103. 103what feature of mobile devices use the most battery life?Location services
  104. 104what is a benefit of jailbreaking a mobile deviceextremely customizable
  105. 105which scenario would prevent a user from upgrading the OS on an Android device?does not meet hardware specifications
  106. 106which type of printer uses electrostatic spray technologyInkjet
  107. 107how is the speed of a printer measured?pages per minute (ppm)
  108. 108how is the quality of printing measureddots per inch (dpi)
  109. 109what is MTBF (mean time between failures)an avg length of time the printer works without failing
  110. 110what is serial data transferthe movement of single bits of info in a single cycle

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FlashCards sobre CET FINAL EXAM PREP, criado por Chahat Sharma em 22-01-2015.
Criado por
Chahat Sharma
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