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