Computer Science for IGCSE & O level - Algorithm Design And Problem Solving (Section 5)
1
What is the primary function of a 'bubble sort' algorithm?
2
Which standard method would be used to find the number of students who scored above 80 on a test?
3
What type of data is used to test the extreme limits of a range of acceptable values?
4
What are the benefits of using a flowchart to represent an algorithm?
5
What is the purpose of a screen/visual check?
إجابة(C)
To have the user confirm entered data against a source document
6
Which keywords are generally used for conditional statements?
7
Which of the following is used to repeat statements?
8
Which flowchart symbol would you use to represent a decision in your algorithm?
9
What is a key characteristic of a 'linear search' algorithm?
إجابة(C)
It examines items in a sequential order.
10
Which data validation check is useful to ensure a date is within a valid range?
11
What is the function of a 'type check' in the context of data validation?
إجابة(C)
To confirm data is of the correct data type.
12
Which of the following data validation methods is suitable for an algorithm that validates a user's age?
13
In the context of algorithm design, what does the term 'iteration' primarily refer to?
إجابة(B)
Repeating a set of actions
14
In the context of a programming algorithm, what is 'totaling' used for?
إجابة(B)
Calculating the sum of a set of numbers.
15
What are the key features of a good algorithm?
16
What is the definition of a 'variable' in programming?
إجابة(B)
A storage location with a name that can hold a value that may change during the program.
17
In the program development life cycle, what is the purpose of the 'Maintenance' phase?
إجابة(B)
To update and improve the program after its release.
18
Which of the following is an example of a selection control structure?
19
What type of data is stored in a 'stack' data structure?
إجابة(B)
Last-In, First-Out (LIFO)
20
What does the term 'algorithm' primarily describe?
إجابة(B)
A set of instructions to solve a problem.
21
What is a key advantage of using a top-down design approach?
إجابة(B)
It simplifies complex problems by breaking them down.
22
What is the purpose of the 'FOR' loop in a programming context?
إجابة(B)
To repeat a block of code a fixed number of times.
23
What is the primary function of an algorithm?
إجابة(C)
To provide a step-by-step solution to a problem.
24
What is the purpose of pseudocode?
إجابة(A)
To provide a way to show algorithm
25
What type of data structure is best suited for implementing a 'undo' functionality?
27
What is the purpose of testing a program?
28
What is a 'syntax error' in programming?
إجابة(B)
An error in the grammar or structure of the code.
29
What is the goal of using "normal data" in testing an algorithm?
إجابة(B)
To test the algorithm with valid and expected inputs.
30
What is a key characteristic of an algorithm?
31
In pseudocode, how are keywords typically written?
32
What is the purpose of a 'FOR' loop in an algorithm?
إجابة(A)
To perform a set of instructions repeatedly for a specific number of times.
33
What is the main goal of the 'Analysis' phase in the program development life cycle?
إجابة(B)
To determine what is required from the program.
34
Which of the following is a suitable method for validating a numerical value entered by a user?
35
Which of these is NOT a reason to use an algorithm?
36
In the pseudocode, what does 'FOR Counter = 1 TO 20' represent?
إجابة(A)
A loop that executes 20 times.
37
Which data structure follows the Last-In, First-Out (LIFO) principle?
38
What does the term 'verification' mean in the context of data?
إجابة(C)
Checking data against the original source to ensure accuracy.
39
What should be used to ensure a numerical value is within a specific range?
40
Which validation check would be appropriate for checking if a text field has any text entered?
41
What is an example of a control structure used in programming?
42
What is the function of 'Storage' in a computer system component?
إجابة(C)
To store data for future use
43
When would you use the FOR...TO...NEXT loop?
إجابة(B)
When you need to repeat an action a set number of times.
44
What is the difference between a pre-condition and post-condition loop?
إجابة(A)
Pre-condition loops check the condition first, post-condition loops check at the end.
45
What is the correct term to describe the process of breaking down a complex problem into smaller, more manageable sub-problems?
46
In the context of conditional statements, what do the keywords IF, THEN, ELSE, and ENDIF signify?
إجابة(C)
Decision-making based on conditions
47
What does 'IF...THEN...ELSE' represent in pseudocode?
48
Which type of error is caused by incorrect logic in the algorithm?
49
What is the purpose of a 'range check' in data validation?
إجابة(A)
To ensure data is within a certain set of values.
50
What type of error is caused by a missing semicolon in a programming language like Python?
