Computer Science for IGCSE & O level - Programming (Section 6)
1
What are parameters used for in functions or procedures?
Trả lời(B)
To pass data into the function or procedure.
2
What is the main goal of program testing?
Trả lời(C)
To ensure the program functions correctly and meets requirements.
3
What is a 'procedure' or 'function' used for in programming?
Trả lời(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[]`?
5
What is a 'constant' in programming?
Trả lời(B)
A value that cannot be changed during program execution.
6
What is the role of the library routines?
Trả lời(B)
They are sets of pre-written functions that perform specific tasks.
7
What type of operator is `>`?
8
Trả lời(C)
An informal way to describe a program.
9
What does the term 'variable' refer to in programming?
Trả lời(B)
A named storage location for data.
10
What is the purpose of the `NumberStudents` constant in the given pseudo-code?
Trả lời(C)
To define the number of students whose data is being processed.
11
What is the scope of a local variable?
Trả lời(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?
Trả lời(C)
It makes the code easier to understand and maintain.
13
What is a key characteristic of a local variable?
Trả lời(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?
Trả lời(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?
16
What is the purpose of the `ELSE IF` statement?
Trả lời(B)
To test another condition if the initial `IF` condition is false.
17
What does a two-dimensional array conceptually represent?
Trả lời(B)
A table with rows and columns
18
Which of the following is not a logical operator?
19
What are library routines primarily used for?
Trả lời(C)
To perform common tasks and operations.
20
What is the purpose of an `AND` operator in a conditional statement?
Trả lời(B)
To combine two conditions, both of which must be true.
21
What is the purpose of a `return` statement within a function?
Trả lời(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?
Trả lời(B)
To exit the loop prematurely.
23
What is the output of the Python code: `print(type(3.14))`?
24
What is the primary use of the `ROUND` routine in the given pseudo-code context?
Trả lời(C)
To round a number to a specified number of decimal places.
25
In the context of programming, what is a variable?
Trả lời(B)
A named storage location for data.
26
In pseudocode, how do you begin an 'IF' statement?
27
What is the benefit of modular programming?
Trả lời(D)
It makes the code more manageable and easier to maintain.
28
Which data type would best represent the weight of a person?
29
What type of data is represented by the variable `TotalWeight` in the given example?
30
In programming, what does the term 'iteration' refer to?
Trả lời(A)
Repeating a block of code.
31
What is the key function of a "compiler"?
Trả lời(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)?
33
Which of the following is a fundamental programming concept related to making choices?
34
What is the function of the `MOD` library routine?
Trả lời(A)
Returns the remainder of a division.
35
What is the primary function of comments in code?
Trả lời(B)
To provide explanations to the programmer and others reading the code.
36
What is a Boolean data type primarily used for?
Trả lời(C)
Representing true or false values
37
What is the purpose of an IDE in programming?
38
Which of the following statements correctly illustrates the use of a nested IF statement?
Trả lời(B)
IF condition1 THEN
IF condition2 THEN
statement1
ENDIF
ENDIF
39
What is the purpose of the 'ELSE' part in an 'IF-ELSE' statement?
Trả lời(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?
Trả lời(C)
To add the current mark to the running total.
41
What is the primary benefit of modular programming?
Trả lời(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?
Trả lời(C)
To send data back to the caller of the function.
43
What is the key difference between `totaling` and `counting`?
Trả lời(B)
Totaling sums numerical values while counting determines the frequency of occurrences.
44
What are comments mainly used for in code?
Trả lời(B)
To provide explanations and document the code.
45
What is the purpose of the `DECLARE` statement in the pseudo-code examples?
Trả lời(C)
To declare variables and their data types.
46
Which string handling method is used to find the number of characters in a string?
47
What is a 'loop' commonly used for in a program?
Trả lời(B)
To repeat a set of instructions.
48
What is the purpose of parameters in functions and procedures?
Trả lời(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)?
50
What is the primary function of the `IF` statement in programming?
Trả lời(C)
To execute a block of code if a condition is true.
