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IGCSE Computer Science Paper 2

Julia Kim Computer Science IGCSE Englisch 30 Karten

IGCSE Computer Science Paper 2

Karten in diesem Stapel (30)

  1. 1What can a problem be decomposed into?Inputs
    Processes
    Outputs
    Storage
  2. 2We can use different methods to solve problems. What is decomposition?Breaking down a complex problem down into smaller, more manageable parts
  3. 3—Flow line
    An arrow represents control passing between the connected shapes    Flow line An arrow represents control passing between the connected shapes
  4. 4—Process
    This shape represents something being
    performed or done.    Process This shape represents something being performed or done.
  5. 5—Subroutine
    This shape represents a subroutine call that will relate to a separate, non-linked flowchart.    Subroutine This shape represents a subroutine call that will relate to a separate, non-linked flowchart.Subroutine This shape represents a subroutine call that will relate to a separate, non-linked flowchart.
  6. 6—Input/Output
    This shape represents the input or output of something into or out of the flowchart.    Input/Output This shape represents the input or output of something into or out of the flowchart.
  7. 7—Decision
    This shape represents a decision
    (Yes/No or True/False) that results in two lines representing the different possible outcomes.    Decision This shape represents a decision (Yes/No or True/False) that results in two lines representing the different possible outcomes.
  8. 8—Terminator
    This shape represents the ‘Start’ and ‘Stop’ of the process.    Terminator This shape represents the ‘Start’ and ‘Stop’ of the process.
  9. 9—NOT
    AND
    OR    NOT AND OR
  10. 10—NAND
    NOR
    XOR    NAND NOR XOR
  11. 11What is validation?Check to ensure that the data entered is sensible and reasonable under certain parameters
  12. 12Types of validationrange check (number between 1-5)
    length check (length between 1-4)
    type check (int, str, char, etc)
    presence check (check if user has entered any data)
    format check (check if data follows a certain pattern, eg. date)
  13. 13What is verification?Act of checking data is accurate when entered into a system, or transferred across systems
  14. 14Types of verificationvisual check (prompting the user to check if the inputted credentials are correct)
    double entry check (entering the data twice in separate input boxes and then comparing the data to ensure they both match)
  15. 154 types of test datanormal
    abnormal
    extreme
    boundary
  16. 16What is extreme test data?largest/smallest acceptable
    value
  17. 17What is boundary test data?is the largest/smallest acceptable
    value and the corresponding smallest/largest
    rejected value
  18. 18Write a line of code that declares a variable IN PSEUDOCODEWrite a line of code that declares a variable IN PSEUDOCODE
  19. 19Describe how to declare an array IN PSEUDOCODEDescribe how to declare an array IN PSEUDOCODE
  20. 20Describe how to write a CASE statement IN PSEUDOCODEDescribe how to write a CASE statement IN PSEUDOCODE
  21. 21What is an iteration?Repeating a set of instructions...
    Until a specific condition is met.
  22. 22What is a selection?Executing different sets of instructions based on certain conditions.
    Two main types of selection statements:
    IF statements
    CASE statements.
  23. 23What are the three types of iterations?Count-controlled loops (FOR)
    Precondition loops (WHILE)
    Postcondition loops (REPEAT ... UNTIL)
  24. 24How do you open a file IN PSEUDOCODE?OPENFILE SampleText.txt FOR READ
    OPENFILE SampleText.txt FOR WRITE    How do you open a file IN PSEUDOCODE?
  25. 25How do you read and write to a file IN PSEUDOCODE?READFILE SampleText.txt
    WRITEFILE SampleText.txt, LineOfText    How do you read and write to a file IN PSEUDOCODE?
  26. 26Name the four string operations and describe how they work IN PSEUDOCODELENGTH()
    LCASE()
    UCASE()
    SUBSTRING()    Name the four string operations and describe how they work IN PSEUDOCODE
  27. 27What structure does a 2D array create, and how do you access elements inside a 2D array?Make a grid-like structure with rows and columns
    ArrayName[i][j]
    [i]: row index
    [j]: column index
  28. 28What is the first index value?The first index value is 0 IN BOTH PSEUDOCODE AND PYTHON.
    Array = ["apple", "banana", "orange", "grape"]
    the string "apple" would be index value 0
  29. 29What is a variable?What is a variable?
  30. 30What is a constant?What is a constant?

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Beschreibung
IGCSE Computer Science Karteikarten am IGCSE Computer Science Paper 2, erstellt von Julia Kim am 13/01/2024.
Erstellt von
Julia Kim · Jan 2024
Aktualisiert
14 Jan 2024
Aufrufe
6
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