Computer Science for IGCSE & O level - Programming (Section 4)
1
What is the value of `x` after the code: `x = 5; x += 3;`?
Trả lời
(D)
8
2
What is the output when using the code: `print "Computer".Substring(3,4)`?
Trả lời
(D)
mpute
3
What is a disadvantage of using global variables extensively?
Trả lời
(B)
They can be easily accessed by any part of the program, leading to potential unintended modifications.
4
Which programming concept allows a program to make decisions?
Trả lời
(B)
Selection
5
Which of the following features are parts of an algorithm?
Trả lời
A
B
C
D
6
What is the primary goal of program documentation?
Trả lời
(B)
To make the code more readable.
7
What does the acronym 'GUI' stand for?
Trả lời
(B)
Graphical User Interface
8
Which of the following is a characteristic of a good programming practice?
Trả lời
(C)
Giving descriptive names to variables
9
What will `print("Python"[2:])` output?
Trả lời
(C)
thon
10
In a pseudo-code program, what is the purpose of a PROCEDURE?
Trả lời
(B)
To group a set of statements to perform a specific task.
11
What data structure is described as containing several elements of the same data type, where each element can be accessed using the same identifier name?
Trả lời
(B)
Array
12
What is the function of `OUTPUT` in programming?
Trả lời
(B)
To display data to the user.
13
Which of the following is NOT a common string method?
Trả lời
(C)
Append
14
In the context of programming, what is a 'bug'?
Trả lời
(B)
An error in the code.
15
What does the algorithm need in order to do output?
Trả lời
(B)
Input
16
Which data type would be most appropriate for storing the number of students in a class?
Trả lời
(D)
INTEGER
17
Which is the correct syntax to call a procedure named 'CalculateMarks'?
Trả lời
(B)
CALL CalculateMarks
18
What type of statement allows a program to choose between different actions based on a condition?
Trả lời
(B)
Selection Statement
19
What does 'scope' refer to in relation to variables?
Trả lời
(B)
Where a variable is accessible within the code.
20
Which programming paradigm is likely being used based on the presented examples?
Trả lời
(C)
Procedural Programming
21
What is the purpose of the `+=` operator in Python (or similar operators in other languages)?
Trả lời
(C)
To add a value to a variable and assign the result to the same variable.
22
What does the term 'sequence' refer to in the context of an algorithm?
Trả lời
(B)
The order in which steps are executed.
23
What is the role of a parameter within a function or procedure?
Trả lời
(C)
To receive data that is passed into the function or procedure.
24
What is the role of the `DIV` library routine?
Trả lời
(B)
To return the quotient (whole number) of a division.
25
Why is it beneficial to use descriptive identifier names?
Trả lời
(C)
It improves the code's readability and maintainability.
26
In the context of programming, what does 'modularity' refer to?
Trả lời
(C)
Breaking down a program into smaller, self-contained, and reusable modules.
27
What type of loop is used to repeat a block of code as long as a condition is true?
Trả lời
(B)
WHILE loop
28
Which string function is typically used to locate a specified character or substring within a string?
Trả lời
(C)
Index or Find
29
What does the term 'index' refer to when discussing arrays?
Trả lời
(C)
The location of an element within the array.
30
What is the purpose of debugging in programming?
Trả lời
(B)
To test and fix errors in the code.
31
In the provided pseudo-code snippets, what does the constant `NumberSubjects` likely represent?
Trả lời
(C)
The total number of subjects a student is taking.
32
What is the correct data type for a value that can store decimal numbers?
Trả lời
(D)
Double/Real
33
In the context of the program, what does the constant `NumberSubjects` likely represent?
Trả lời
(B)
The number of subjects a student takes.
34
In the provided context of student mark calculations, what is the likely purpose of the variable `studentTotal`?
Trả lời
(B)
The total marks obtained by a student.
35
What is the main role of a programming language's syntax?
Trả lời
(A)
To define the rules for writing valid statements.
36
What data type is typically used to store a whole number?
Trả lời
(B)
Integer
37
What does the assignment operator do?
Trả lời
(C)
Assigns a value to a variable
38
What is the term for the process of repeating a set of instructions in a program?
Trả lời
(B)
Iteration
39
Which of the following is an example of a logical operator?
Trả lời
(C)
AND
40
Which of the following best describes an 'algorithm'?
Trả lời
(B)
A set of instructions for a specific task.
41
Which one is a comment feature in the Python language?
Trả lời
(C)
'# '
42
What is the purpose of an 'IF' statement in programming?
Trả lời
(B)
To make decisions based on a condition.
43
What does the acronym "GUI" stand for?
Trả lời
(A)
Graphical User Interface
44
In pseudo code, what is the purpose of the keyword "OUTPUT"?
Trả lời
(B)
To display information to the user.
45
In the provided pseudocode, what does the value 999 represent?
Trả lời
(C)
A delimiter to finish the loop
46
What is the purpose of indentation in Python?
Trả lời
(D)
All of the above
47
What is the range of values for a boolean data type?
Trả lời
(B)
True or False
48
What is the output of the code: `print(type(True))`
Trả lời
(C)
49
What does the term 'selection' refer to in programming?
Trả lời
(C)
Choosing different paths of code execution.
50
If a function needs to return multiple values, what is one common way to achieve this in programming?
Trả lời
(C)
Return a single array or object containing the multiple values.
