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Flashcards

Computing revision

Cameron Morton English 60 cards

Cards in this deck (60)

  1. 1Colour depthThe amount of binary stored for each image.
  2. 2Image resolutionThe amount of DPI in the image (DPI stands for dots per inch).The more DPI you have the more pixels needed.
  3. 3Image sizeMeasured in pixels. (width x height)
  4. 4MetadataInformation about the image so that the computer is able to make sense of the binary data.
  5. 5How many possible colours would the following have: - 1bit - 4 bits - 8 bits - 24 bits1 bit = 2 possible colours
    4 bits = 16 possible colours
    8 bits = 256 possible colours
    24 bits = 16.7million possible colours
  6. 6Name two types of file compressionlossy and lossless
  7. 7Give a disadvantage of lossy compressionLossy file compression results in lost data and quality from the original version.
  8. 8A denary number can have a value from 0 to 9 whereas a binary number can only have a _____________________1 and 0
  9. 9what is DIVDivide and ignoring the remainders
  10. 10What is 10 DIV 39
  11. 11What is MODThe remainder of the DIV
  12. 1210 MOD 31
  13. 135 MOD 105
  14. 14What is exponentiationRaising something to the power.
  15. 15What is test dataThe actual data that we input for example lemons, 5, 10, d87
  16. 16What is PurposeErroneous, Boundary and Normal
  17. 17What is a TrojanGains access to a computer by pretending to be legitimate software.
  18. 18What is spywarerecords the activity on your computer such as your keystrokes, thereby
    logging your passwords for instance and then sending the data back over the
    network to the attack instigator. They can also control your microphone and webcam.
  19. 19What are wormsThey attach
    themselves to network tools to spread automatically around a network very
    quickly.
  20. 20Name the programming constructssequence, selection, iteration
  21. 21Which is correct: Input=name() Name=input() Input=()name Name=()inputName=input()
  22. 22What is phishingan email or text messaging scam where victims
    are conned into believing that they are being contacted by an
    authentic organization (e.g. by their bank) and can give sensitive
    personal details (such as bank account passwords).
  23. 23What is pharmingUsers are redirected to a fraudulent website that they
    believe to be genuine because it looks like the real site.
  24. 24What is shoulder surfingFrauders look over the shoulder of users to see
    what passwords or PIN numbers are being typed into the device.
  25. 25What is Validationchecking to see if the answer is reasonable
    (Range check, presence check, Type check, list check, format check, length check)
  26. 26What is a brute force attackwhen all possible password combinations are systematically tried, with the hope of getting it right.
  27. 27What is denial-of-service attack (DoS)when a network resource becomes deliberately overloaded (‘flooded’) with unnecessary requests, preventing it from
    responding normally.
  28. 28What is distributed-denial-of-service attack (DDoS)when the requests come from many sources so you cannot just block a single IP address.
  29. 29What is structure query language (SQL) injectionwhen a website is linked to a database and allows a user to enter information, it makes it possible for malicious
    code to be entered into a website form, in order to modify the SQL statement being executed.
  30. 30What is malwaresoftware that has been purposely developed to damage, disrupt or take control of computer systems.
  31. 31What is social engineeringtechniques that manipulate people into giving away confidential and personal information.
  32. 32What is volatileWhen you shutdown the computer losses the data
  33. 33What is ROMIs not volatile, stores the instruction needed to start the computer up
  34. 34What does ROM stand forRead only memory
  35. 35What does RAM stand forRandom access memory
  36. 36What is the clock speed of a computer meanHow fast a computer can complete the fetch decode execute cycle.
  37. 37What is secondary storageSecondary storage is unused when the RAM is full
  38. 38Give a disadvantage of Client server networkIf too many client make request to the same server it will overload and crash/will not be able to cope.
  39. 39Give a disadvantage of peer to peer networkYour personal data is only saved on that computer so you cannot move, In a business or school every computer would have to be updated individually.
  40. 40Name the 3 main character setsAscii, Unicode and Extended ascii
  41. 41What does the acronym TREE stand for. (IDE)T- Translator.
    R - Run time environment.
    E - Error diagnostics.
    E - Editor.
  42. 42What words do you need to write SQL.SELECT
    FROM
    WHERE
  43. 43An example of SQLSELECT Name/Address/City
    FROM Name/Address/City
    WHERE City = 'Weston'
    or
    WHERE age >/=/<=/== 18
  44. 44What is validation?Checking that the data the user has entered is sensible and reasonable
    (NOT Accurate)
    Different type of checks - Presence, type, range, list, format, length
  45. 45What does a translator do?It turns your code from high level language to low level language.
  46. 46What does a editor do?Somewhere that you can write your code
  47. 47What does a error diagnostics do?Error diagnostics (Debugging tool) can highlight your syntax errors (not logic errors)
  48. 48What is verificationVerification is when the program checks that the data is accurate.
  49. 49What is a character data typeCharacters are single characters (f - is a character)
  50. 50What is a stringStrings are characters put together (from - is a string)
  51. 51What is a integer?An integer is a whole number.
    (4628)
  52. 52What is a real?Represent an approximation of a real number.
    (3.14)
  53. 53What do IDE's do?Integrated development environment. It is a computer program that makes it easier to make other computer programs.
  54. 54What is casting?Changing the type of data.
    str("32")
    int(32)
  55. 55What is a variable?Stores data that can can change while the program is running.
    Identifies the memory location.
  56. 56What is testing?To find syntax or logic errors. To make sure it works the way the client wants it to.
  57. 57What is iteration?Repeating until something changes.
  58. 58What is selection?When you are being given choice and need to choose a way to go.
  59. 59What is sequence?set down instructions one after another for the computer to execute in turn.
  60. 60—

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Flashcards on Computing revision , created by Cameron Morton on 16/06/2021.
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Cameron Morton
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