Computer Science for IGCSE & O level - Programming (Section 9)
1
What do parameters do in functions or procedures?
Trả lời
(B)
They receive data passed into the function or procedure.
2
In the context of file handling, what does 'WRITE' typically signify?
Trả lời
(D)
Write data into a file.
3
What is the primary purpose of storing data in a file?
Trả lời
(B)
To store data persistently for later use.
4
Which statement is used to select one option out of multiple options?
Trả lời
(C)
CASE statement
5
What is the name for a named storage location in a computer's memory?
Trả lời
(B)
Variable
6
What is the result of this comparison: `5 <= 5`?
Trả lời
(A)
True
7
What is a common characteristic of a well-designed algorithm?
Trả lời
(C)
It should be efficient and solve the problem correctly.
8
What is the benefit of using comments in code?
Trả lời
A
B
9
What is the purpose of the `ELSE` statement in an `IF` statement?
Trả lời
(B)
To specify the actions to be taken if the `IF` condition is false.
10
Which of the following are important aspects when writing a file?
Trả lời
A
B
C
11
What is the primary function of a loop in programming?
Trả lời
(B)
To execute a block of code repeatedly.
12
If you wanted to store the ages of students and their corresponding grades in an organized format, what type of structure would you use?
Trả lời
(C)
A two-dimensional array.
13
If `Value1 = MOD(20, 3)`, what is the value of `Value1`?
Trả lời
(D)
2
14
What is the result of the following operation: 10 % 3?
Trả lời
(A)
1
15
What is the primary difference between an `INTEGER` and a `REAL` data type?
Trả lời
(B)
INTEGER stores whole numbers, REAL stores numbers with decimal points.
16
In the context of programming, what is a variable?
Trả lời
(B)
A named data store that holds a value that can change.
17
Which statement is used in programming to execute a block of code multiple times?
Trả lời
(D)
FOR, WHILE
18
What is the purpose of a 'loop' in programming?
Trả lời
(B)
To execute a block of code repeatedly.
19
What is the role of comments in a program?
Trả lời
(C)
To explain the code to humans.
20
Which data type is most suitable for storing True/False values?
Trả lời
(C)
Boolean
21
What is a step-by-step set of instructions used for solving a problem?
Trả lời
(C)
An algorithm.
22
What does the term "iteration" primarily refer to in programming?
Trả lời
(B)
The repetition of a set of instructions
23
Why is it important to use clear and meaningful identifiers (variable names, function names, etc.)?
Trả lời
(C)
To improve the code's readability and maintainability.
24
Which of the following statements represents an input operation?
Trả lời
(B)
name = input()
25
What is the purpose of a 'comment' in a program?
Trả lời
(B)
To provide an explanation or description of the code.
26
Which of the following best describes the purpose of comments in code?
Trả lời
(C)
To provide documentation for the code.
27
Which of the following is a characteristic of high-level programming languages?
Trả lời
B
C
28
What does an IDE primarily offer to programmers?
Trả lời
A
B
C
29
What would be an appropriate data type to store a person's name?
Trả lời
(C)
String
30
Which statement represents a logical decision in a program?
Trả lời
(C)
IF x > 10 THEN
31
Which of these elements can be found in a procedure definition?
Trả lời
A
B
D
32
In the context of arrays, what does the term "index" refer to?
Trả lời
(C)
The position of each element within the array.
33
What keyword is commonly used to start a comment in Python, based on the provided examples?
Trả lời
(C)
#
34
Which string method is used to find the number of characters in a string?
Trả lời
(A)
Length
35
What is the role of the `NumOfSubjects` constant in the code?
Trả lời
(C)
To set a fixed value for a number of subjects.
36
What is the process of finding and fixing errors in a program called?
Trả lời
(B)
Debugging
37
What are the key components of a standard programming environment?
Trả lời
(A)
Text editor, compiler, and debugger
38
If the 'age' input is 20, what output will the following code produce?
```
IF age >= 17
THEN
Print "You are an adult"
ELSE
Print "You are a child"
ENDIF
```
Trả lời
(B)
You are an adult
39
What does the MOD function calculate in programming?
Trả lời
(C)
The remainder of a division.
40
What is a key benefit of using nested statements (e.g., an IF statement inside another IF statement)?
Trả lời
(C)
It allows for more complex and detailed logic.
41
What does the following Python code do? `myFile = open('myText.txt', 'r')`
Trả lời
(B)
Opens a file named 'myText.txt' for reading.
42
Which string method can be used to find the location of a certain character in a string?
Trả lời
(C)
Find
43
Which is true about nesting selection statements?
Trả lời
(B)
It can enhance code's modularity and structure.
44
What is the purpose of the 'length' string function?
Trả lời
(B)
To return the number of characters in a string.
45
What is a key characteristic of a procedure, as described in the provided text?
Trả lời
(C)
It is a set of programming statements grouped together under a single name.
46
What is a 'subroutine' also known as?
Trả lời
(C)
Function or Procedure
47
What is the objective of the 'Worked example' at the beginning of the document?
Trả lời
(B)
To calculate and output statistics for a class of students.
48
Which character is typically used as the multiplication operator?
Trả lời
(B)
*
49
In the pseudocode example for writing to a file, which command is used to write a line of text?
