Computer Science for IGCSE & O level - Programming (Section 2)

• 1

  What is the role of a 'comment' in source code?

  Svare

  (C)

  To provide explanations for humans reading the code.
• 2

  What is the process of finding and fixing errors in a program called?

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  (B)

  Debugging
• 3

  What does an algorithm represent in computer science?

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  (A)

  A set of instructions for the computer to follow to solve a problem.
• 4

  Which operator is used for exponentiation (raising a number to a power)?

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  (B)

  **
• 5

  Which of the following is a valid example of a data type?

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  (C)

  String
• 6

  What is the function of the `len()` method in Python (or equivalent in other languages, like 'length' in some)?

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  (C)

  To determine the number of characters in a string or elements in a list.
• 7

  Which of the following is an example of 'iteration'?

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  (C)

  for loop
• 8

  Which section is the visual output of the Visual Basic program?

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  (A)

  The sum window
• 9

  Which is a common use of comments in code?

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  (C)

  To provide explanations to the code.
• 10

  What is the purpose of indentation in programming code?

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  (B)

  To make the code easier to read and understand.
• 11

  What is a key feature of a function?

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  (B)

  It always returns a value.
• 12

  What is the function of the 'OUTPUT' statement in programming?

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  (B)

  To display information to the user.
• 13

  What does `ClassTotal` most likely represent in the example?

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  (D)

  The total of student scores in the class.
• 14

  What is the primary goal of using comments in code?

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  (C)

  To explain the code's functionality.
• 15

  What is the result of the expression: `(10 > 5) OR (2 < 1)`?

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  (A)

  True
• 16

  What is the purpose of a "prompt" when taking input in a program?

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  (C)

  To show instructions to the user regarding what input is required.
• 17

  What keyword typically declares a constant variable in programming?

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  (C)

  CONST
• 18

  Which data type is most appropriate for representing the radius of a circle?

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  (D)

  REAL
• 19

  What data type is suitable for storing textual data, such as a name or a sentence?

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  (C)

  String
• 20

  In the provided pseudocode, what does the variable `COUNTER` represent?

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  (B)

  The number of marks entered.
• 21

  Which of the following represents the 'input' operation?

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  (B)

  read()
• 22

  Which of the following is a common type of error in programming?

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  (D)

  All of the above
• 23

  Which programming construct is typically used to process each element of an array sequentially?

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  (B)

  FOR loop
• 24

  What is the role of an 'interpreter' in programming?

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  (B)

  To execute the code directly, line by line.
• 25

  In a programming context, what is a comment used for?

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  (C)

  To explain what the code does.
• 26

  What does the term 'modularity' mean in programming?

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  (C)

  Dividing a program into independent, reusable components (modules).
• 27

  What is the result of the expression `10 > 5 AND 2 < 1`?

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  (B)

  False
• 28

  Which of the following is a characteristic of a string data type?

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  (B)

  Stores a sequence of characters.
• 29

  What is the purpose of an `algorithm`?

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  (B)

  To solve a problem step-by-step.
• 30

  Which logical operator returns true if *at least one* condition is true?

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  (B)

  OR
• 31

  Which of the following is a valid variable name?

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  (C)

  _variable
• 32

  What is the output of: `print "abc" + "def"`?

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  (C)

  abcdef
• 33

  Which of the following is a characteristic of a good variable name?

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  (B)

  Meaningful and descriptive
• 34

  What is the role of a function?

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  (B)

  To perform a specific task.
• 35

  Which of the following is the primary purpose of a library routine?

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  (A)

  To allow for modularity and reusability of code.
• 36

  What does the term 'sequence' refer to in the context of programming?

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  (B)

  The order in which steps in an algorithm are executed.
• 37

  What does `//` represent in some programming languages (e.g. Python)?

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  (C)

  Integer division operator
• 38

  What is the primary role of a compiler?

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  (B)

  To translate human-readable code into machine code.
• 39

  Which part of the code is considered a 'function'?

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  (B)

  A repeatable section of code.
• 40

  Which data type is appropriate for storing a person's name in a program?

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  (D)

  STRING
• 41

  Which best describes the main goal of the provided examples?

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  (C)

  To teach students how to calculate and display student marks.
• 42

  What is the benefit of using meaningful identifier names for variables, constants, and procedures?

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  (C)

  It improves the program's readability and maintainability.
• 43

  Which of the following are examples of basic concepts used when developing a program?

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  A

  B

  C

  D
• 44

  What is the purpose of the 'main' method in a Java program?

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  (B)

  To start the program's execution.
• 45

  In programming, what does the `else` clause typically follow?

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  (B)

  An `IF` statement
• 46

  Which of these would be considered a variable type?

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  (A)

  integer
• 47

  What are the general steps in creating a program?

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  A

  B

  C

  D
• 48

  Which of the following tools can you use for debugging your code?

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  A

  C

  D
• 49

  Which of the following is an example of a pre-condition loop?

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  (C)

  WHILE...DO
• 50

  What is the scope of a local variable?

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  (B)

  Accessible only within the function or block of code where it is declared.