Computer Science for IGCSE & O level - Programming (Section 13)
1
Which of the following are typical components of a file handling process?
Respuesta
A
B
C
2
What does the `import java.io.File` statement do in Java?
Respuesta
(A)
Imports the file class
3
What happens if you attempt to read from a file that hasn't been opened first?
Respuesta
(C)
An error will likely occur.
4
Based on the information given, a one-dimensional array can also be referred to as:
Respuesta
(B)
A list
5
Which operator is typically used to represent 'not equal to' in most programming languages?
Respuesta
(A)
!=
6
Which of the following components are crucial for the file handling procedure?
Respuesta
B
C
D
7
Which of the following statements is true about file storage?
Respuesta
B
C
D
8
Which of the following best describes a global variable?
Respuesta
(B)
It can be used by any part of the program.
9
What does the `READFILE` statement in the pseudocode signify in the context of file handling?
Respuesta
(C)
Reads a line from the file.
10
Which of the following are common data types used in programming?
Respuesta
A
B
C
D
11
What does DRY stand for in programming principles?
Respuesta
(A)
Don't Repeat Yourself
12
Which of the following is a purpose of comments in the program?
Respuesta
(B)
They help in code readability.
13
In the pseudocode, what does the line `AVERAGE = TOTAL / COUNTER` calculate?
Respuesta
(C)
The average of the marks.
14
What is the correct keyword for declaring a constant?
Respuesta
(C)
CONST
15
What does the program compute after the completion of the outer loop? (FOR Student = 1 TO NumOfStudents)
Respuesta
(D)
All of the above
16
Which of the following are important aspects of code readability?
Respuesta
A
B
C
17
Which logical operator would result in TRUE only if *both* operands are TRUE?
Respuesta
(B)
AND
18
If the value of 'age' is 10 and the following code executes, what will be printed?
```
IF age >= 17
THEN
Print "You are an adult"
ELSE
Print "You are a child"
ENDIF
```
Respuesta
(A)
You are a child
19
What is the result if a CASE statement has no matching case, and no default (or ELSE) clause?
Respuesta
(C)
The program continues execution after the CASE block.
20
Which of the following is considered a control structure?
Respuesta
(C)
Loops
21
What does the `Uppercase` method usually do in string manipulation?
Respuesta
(C)
Convert a string to uppercase.
22
What does the term 'scope' refer to in programming?
Respuesta
(C)
The part of the program where a variable is accessible.
23
What is typically required before writing to a file in most programming languages?
Respuesta
(B)
Opening the file in write mode
24
What is the purpose of comments in programming?
Respuesta
(B)
To improve code readability and explain the code.
25
In the pseudocode example, the variable 'COUNTER' is incremented in each iteration. What is the role of COUNTER?
Respuesta
(C)
To count the number of marks entered.
26
What will be calculated by the inner loop, for each student, during the nested loop structure?
Respuesta
(C)
The sum of all the marks obtained in all subjects.
27
What would be the appropriate data type for the variable used to store a student's name?
Respuesta
(C)
STRING
28
What is one of the first steps involved in writing to a file?
Respuesta
(C)
Opening the file.
29
What does the 'a' mode stand for when opening a file?
Respuesta
(C)
Append mode
30
What is the purpose of comments in a program?
Respuesta
(C)
To explain the code to humans.
31
What is the purpose of an algorithm?
Respuesta
(B)
To provide a set of instructions to solve a problem.
32
What is a procedure also known as?
Respuesta
(C)
A subroutine
33
What operation is performed by the statement `myFile.write('Hello')` in a Python example?
Respuesta
(B)
Writing 'Hello' to the file
34
What does the term 'index' refer to within an array?
Respuesta
(C)
The position of an element within the array
35
What does the `open()` function typically return when successful?
Respuesta
(C)
A file object
36
What does `myFile.readline()` do in Python?
Respuesta
(B)
Reads a line from the file
37
What is the function of the `Lowercase` method in string handling?
Respuesta
(C)
To convert a string to lowercase.
38
In the provided code, what is the purpose of initializing `ClassHigh` to 0?
Respuesta
(C)
To set the starting value for comparing with student marks.
39
What does a "For" loop usually require?
Respuesta
(A)
A start value, an end value, and an increment/decrement.
40
What is the purpose of `Input` in the pseudo code?
Respuesta
(B)
Takes the input from the user.
41
Which programming construct allows a program to repeat a block of code until a certain condition is met?
Respuesta
(B)
Iteration statement
42
Which of the following is NOT a typical action when working with a file?
Respuesta
(D)
Sorting
43
In a nested IF-ELSE structure, how are the inner blocks of code related to the outer structure?
Respuesta
(B)
The execution of the inner block depends on the condition of the outer block.
44
Which of the following are good practices when working with files?
Respuesta
A
C
45
What is the advantage of using meaningful identifiers for variables?
Respuesta
(B)
Improves code readability and understanding.
46
Which type of loop is characterized by the condition being evaluated *after* the loop body executes?
Respuesta
(B)
Post-condition loop
47
Which part of the program is executed based on the value of 'answer' in the case statement?
Respuesta
(B)
The code block associated with the matching case.
48
What does the '%' operator represent in many programming languages?
Respuesta
(C)
Modulo (remainder)
49
What is the primary benefit of the 'modular' approach to programming (using procedures and functions)?
Respuesta
(D)
It enhances reusability and reduces code duplication.
50
Which is a characteristic of a post-condition loop?
