In a Java program, where does the program start executing?
Trả lời
(B)
In the main method
16
What is the main difference between a local and a global variable?
Trả lời
(C)
Local variables are declared inside a function, and global variables are declared outside any function.
17
When designing an algorithm, what should you consider first?
Trả lời
(B)
The desired output and the steps needed to achieve it.
18
Which of the following is a characteristic of a good algorithm?
Trả lời
(B)
It should be efficient and produce the correct output.
19
What is the output of `print(10 // 3)`?
Trả lời
(B)
3
20
Which of the following are considered string handling methods?
Trả lời
A
B
21
What is the primary advantage of using nested loops in programming?
Trả lời
(B)
To repeat a set of instructions multiple times for different levels of iteration.
22
In file handling, what is the purpose of closing a file?
Trả lời
(C)
To release system resources.
23
Which of these is an example of a valid variable assignment in Python?
Trả lời
(B)
name = "John"
24
What is a benefit of using a high-level programming language over a low-level programming language?
Trả lời
(C)
Easier to write and understand.
25
What data type would be used to store the value 'True' or 'False'?
Trả lời
(C)
Boolean
26
What is the main purpose of comments in programming?
Trả lời
(B)
To provide explanations about the code.
27
How can you make your program easier to modify and update (more maintainable)?
Trả lời
(B)
By using meaningful variable names and comments.
28
In a program dealing with student data, what is the likely purpose of a constant declared as `MAX_SUBJECTS`?
Trả lời
(B)
To define the maximum number of subjects a student can take.
29
Why is modular programming beneficial?
Trả lời
(C)
It helps with code reuse and makes code easier to manage.
30
In the example given (total and counting), what data structure is being used?
Trả lời
(B)
Variables
31
What is the purpose of the `FOR` loop in the context of student and subject marks?
Trả lời
(C)
To iterate through a specified number of subjects or students.
32
What is an 'operand' in a programming context?
Trả lời
(B)
A variable or value that an operator acts upon.
33
Which data type is used to represent text in programming?
Trả lời
(C)
String
34
In a one-dimensional array, what typically represents the first element's index in most programming languages?
Trả lời
(C)
0
35
Which data type is most suitable for storing the number of hours worked?
Trả lời
(D)
INTEGER
36
Which programming concept is used to repeatedly execute a block of code?
Trả lời
(C)
Iteration
37
If you want to find the largest value in a set of numbers, what programming construct would you use?
Trả lời
(A)
A loop combined with a conditional statement.
38
What distinguishes local variables from global variables?
Trả lời
(C)
Local variables are only accessible within the block (e.g., function) where they are declared; global variables can be accessed throughout the program.
39
What is the purpose of the `OR` operator in a conditional statement?
Trả lời
(B)
To execute code if at least one condition is true.
40
What does a conditional statement (e.g., `IF-THEN-ELSE`) primarily do?
Trả lời
(C)
Execute code based on a specific condition.
41
What does DRY stand for in programming principles?
Trả lời
(A)
Don't Repeat Yourself
42
What is the role of the `break` statement inside a loop?
Trả lời
(B)
To stop the execution of the loop.
43
What does the `OUTPUT` statement typically require?
Trả lời
(B)
A variable or expression to display.
44
If you wanted to convert the string "hello" to uppercase, what string handling method would you use?
Trả lời
(C)
ToUpper()
45
When declaring an array, what determines the maximum number of elements it can hold?
Trả lời
(C)
The specified size or bounds of the array
46
Which data type is the most suitable for storing someone's age?
Trả lời
(D)
INTEGER
47
In which programming language can you find the `CASE` statement?
Trả lời
(D)
All languages that support Selection
48
Which structure is used to execute a piece of code repeatedly?
Trả lời
(C)
A loop.
49
What is the first line in Python code output?
Trả lời
(C)
print ('Hello World')
50
Which data type would you use to represent a true or false value in programming?
