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Computer Science for IGCSE & O level - Programming (Section 6)

1
What are parameters used for in functions or procedures?
Answer
(B)
To pass data into the function or procedure.
2
What is the main goal of program testing?
Answer
(C)
To ensure the program functions correctly and meets requirements.
3
What is a 'procedure' or 'function' used for in programming?
Answer
(C)
To group a set of instructions to perform a specific task.
4
In the provided image what is the index of the staff in position 1 in the array `StaffName[]`?
Answer
(A)
0
5
What is a 'constant' in programming?
Answer
(B)
A value that cannot be changed during program execution.
6
What is the role of the library routines?
Answer
(B)
They are sets of pre-written functions that perform specific tasks.
7
What type of operator is `>`?
Answer
(C)
Comparison Operator
8
What is a "pseudocode"?
Answer
(C)
An informal way to describe a program.
9
What does the term 'variable' refer to in programming?
Answer
(B)
A named storage location for data.
10
What is the purpose of the `NumberStudents` constant in the given pseudo-code?
Answer
(C)
To define the number of students whose data is being processed.
11
What is the scope of a local variable?
Answer
(B)
Accessible within the function or block where it is defined.
12
What is the benefit of using meaningful identifier names (variables, functions, etc.) in your code?
Answer
(C)
It makes the code easier to understand and maintain.
13
What is a key characteristic of a local variable?
Answer
(C)
It is limited to the part of the program where it is declared.
14
What is the primary difference between a pre-condition loop and a post-condition loop?
Answer
(C)
Pre-condition loops check the condition before the loop body is executed.
15
Which of the following is an example of an output statement in Python?
Answer
(B)
print()
16
What is the purpose of the `ELSE IF` statement?
Answer
(B)
To test another condition if the initial `IF` condition is false.
17
What does a two-dimensional array conceptually represent?
Answer
(B)
A table with rows and columns
18
Which of the following is not a logical operator?
Answer
(D)
XOR
19
What are library routines primarily used for?
Answer
(C)
To perform common tasks and operations.
20
What is the purpose of an `AND` operator in a conditional statement?
Answer
(B)
To combine two conditions, both of which must be true.
21
What is the purpose of a `return` statement within a function?
Answer
(B)
To exit the function and optionally send a value back.
22
What is the purpose of a `break` statement within a loop in most programming languages?
Answer
(B)
To exit the loop prematurely.
23
What is the output of the Python code: `print(type(3.14))`?
Answer
(C)
24
What is the primary use of the `ROUND` routine in the given pseudo-code context?
Answer
(C)
To round a number to a specified number of decimal places.
25
In the context of programming, what is a variable?
Answer
(B)
A named storage location for data.
26
In pseudocode, how do you begin an 'IF' statement?
Answer
(B)
IF
27
What is the benefit of modular programming?
Answer
(D)
It makes the code more manageable and easier to maintain.
28
Which data type would best represent the weight of a person?
Answer
(B)
REAL
29
What type of data is represented by the variable `TotalWeight` in the given example?
Answer
(C)
Integer
30
In programming, what does the term 'iteration' refer to?
Answer
(A)
Repeating a block of code.
31
What is the key function of a "compiler"?
Answer
(B)
To translate high-level code to machine code.
32
Which of the following would be a suitable data type for storing a student's grade (e.g., A, B, C)?
Answer
(B)
String
33
Which of the following is a fundamental programming concept related to making choices?
Answer
(C)
Selection
34
What is the function of the `MOD` library routine?
Answer
(A)
Returns the remainder of a division.
35
What is the primary function of comments in code?
Answer
(B)
To provide explanations to the programmer and others reading the code.
36
What is a Boolean data type primarily used for?
Answer
(C)
Representing true or false values
37
What is the purpose of an IDE in programming?
Answer
(B)
To write and run code.
38
Which of the following statements correctly illustrates the use of a nested IF statement?
Answer
(B)
IF condition1 THEN IF condition2 THEN statement1 ENDIF ENDIF
39
What is the purpose of the 'ELSE' part in an 'IF-ELSE' statement?
Answer
(B)
To specify the code to execute if the condition is false.
40
What is the purpose of the `Total = Total + Mark` statement in the code?
Answer
(C)
To add the current mark to the running total.
41
What is the primary benefit of modular programming?
Answer
(B)
It helps in code reuse and makes the code easier to understand and maintain.
42
What is the main function of the `RETURN` keyword within a function?
Answer
(C)
To send data back to the caller of the function.
43
What is the key difference between `totaling` and `counting`?
Answer
(B)
Totaling sums numerical values while counting determines the frequency of occurrences.
44
What are comments mainly used for in code?
Answer
(B)
To provide explanations and document the code.
45
What is the purpose of the `DECLARE` statement in the pseudo-code examples?
Answer
(C)
To declare variables and their data types.
46
Which string handling method is used to find the number of characters in a string?
Answer
(B)
Length
47
What is a 'loop' commonly used for in a program?
Answer
(B)
To repeat a set of instructions.
48
What is the purpose of parameters in functions and procedures?
Answer
(B)
They pass data into the function or procedure.
49
What is the purpose of the `//` symbol in the provided code snippets (as used in some programming languages)?
Answer
(B)
To start a comment.
50
What is the primary function of the `IF` statement in programming?
Answer
(C)
To execute a block of code if a condition is true.