Computer Science for IGCSE & O level - Programming (Section 14)
1
What type of programming statements allows the program to execute different blocks of code based on certain conditions?
Trả lời
(C)
Selection statements
2
Which of the following is NOT a characteristic of a function in the context of the given material?
Trả lời
(D)
A function can't have parameters.
3
Which of the following is NOT a string handling method?
Trả lời
(D)
Multiply
4
What is the purpose of the line: `ClassHigh = 0` in the beginning of the provided code example?
Trả lời
(A)
To initialize the variable ClassHigh.
5
Which of the following are examples of standard library routines, based on the text?
Trả lời
A
B
6
What is a characteristic of a pre-condition loop?
Trả lời
(C)
The condition is checked *before* each iteration.
7
If the function is defined with parameters, what should the call match?
Trả lời
(A)
Argument should match parameters.
8
Which of the following data types can store true or false values?
Trả lời
(C)
Boolean
9
What does the pseudocode example `INPUT myText;` do?
Trả lời
(C)
Takes input from the user and stores it in a variable called 'myText'.
10
Based on the image, arrays can be:
Trả lời
A
B
11
How do you call a procedure or function with parameters?
Trả lời
A
B
C
12
Which of these are important features when writing a file?
Trả lời
A
C
D
13
What are the main components usually found in a "For" loop structure?
Trả lời
A
B
C
14
What does the acronym 'IDE' stand for?
Trả lời
(B)
Integrated Development Environment
15
What should you consider when a procedure has parameters?
Trả lời
(B)
The argument should match the parameters.
16
What is the function of a 'FOR' loop in programming?
Trả lời
(A)
To execute a block of code repeatedly a specific number of times.
17
What is the primary purpose of nesting selection statements (e.g., an IF statement inside another IF statement)?
Trả lời
(C)
To enable the implementation of complex conditional logic.
18
Which of the following is an example of an input statement?
Trả lời
(C)
input("Enter a number:")
19
What is the main function of the `output` statement in the code examples?
Trả lời
(C)
To display results to the user.
20
What is the purpose of the `CLOSEFILE` statement in file handling?
Trả lời
(C)
To close the connection to the file.
21
What is a common use case for the 'try...catch' block?
Trả lời
(B)
To handle potential errors during file operations
22
Which of the following tasks is NOT typically performed by standard library routines (as discussed in the text)?
Trả lời
(C)
Defining the program's variables.
23
What is a fundamental concept in the context of creating a maintainable program?
Trả lời
(B)
Using meaningful identifier names.
24
Which type of statement enables a program to make decisions based on the evaluation of an expression?
Trả lời
(C)
Selection statement
25
In the provided Java code, what is the purpose of `try...catch` blocks?
Trả lời
(B)
To handle potential errors during file operations
26
What type of programming structure is characterized by loops that have at least one iteration?
Trả lời
(C)
Post-condition loops.
27
What operation is being performed by the code `NumberOfSacks = NumberOfSacks + 1;` (Counting)?
Trả lời
(C)
Incrementing the value of NumberOfSacks.
28
What type of loop always has at least one iteration?
Trả lời
(C)
Do-While loop
29
Which of the following is used to store a single character?
Trả lời
(C)
Char
30
What is the function of a file object?
Trả lời
(B)
To represent the file and provide methods for interacting with it.
31
Which logical operator would be used to combine the conditions 'A is true' and 'B is true' to only execute the consequent statements?
Trả lời
(B)
AND
32
What does the term 'bug' refer to in the context of programming?
Trả lời
(B)
An error or defect in a program.
33
What happens if there is a nesting of selection statements (IF-ELSE inside another IF-ELSE)?
Trả lời
(C)
It can create more complex decision-making logic.
34
When a function is defined, what will always be defined as the first statements to be defined?
Trả lời
(D)
The name of the function or procedure
35
What is the purpose of an algorithm?
Trả lời
(B)
To provide step-by-step instructions for solving a problem.
36
In the Totaling example (TotalWeight = TotalWeight + Weight), what does 'Weight' represent?
Trả lời
(B)
The amount to be added to the total weight.
37
Which statements are correct about nested statements?
Trả lời
A
C
38
Which string handling method is used to find the number of characters in a string?
Trả lời
(B)
Length
39
In the context of a program, what does 'iteration' refer to?
Trả lời
(B)
The process of repeating a set of instructions.
40
What is the purpose of the `OPENFILE` command in pseudocode for file handling?
Trả lời
(C)
To establish a connection with the file.
41
Which operator is used to get the remainder in division?
Trả lời
(C)
%
42
What is the primary function of selection statements in programming?
Trả lời
(C)
To make decisions and control program flow based on conditions.
43
What data type would be most appropriate for storing a student's grade (e.g., A, B, C)?
Trả lời
(C)
STRING
44
What operation does the following line of pseudo-code perform? `studentAverage = studentTotal / numOfSubjects`
Trả lời
(B)
Calculates the average mark of a student.
45
What does the inner loop of the program, as described in the 'Worked Example,' primarily calculate?
Trả lời
(C)
The total marks for each student.
46
In the code examples, which language uses `dim` and `console.writeline`?
Trả lời
(B)
Visual Basic
47
In Java, what is used to create an object for writing into a file?
Trả lời
(C)
FileWriter
48
What kind of loop is used for iteration in the examples given?
Trả lời
(A)
FOR...NEXT loop
49
What will be the output when `age` is 20, given the following code?
```
IF age >= 17
THEN
Print "You are an adult"
ELSE
Print "You are a child"
ENDIF
```
Trả lời
(B)
You are an adult
50
Which loop structure is known for checking the condition at the *end* of the loop?
