Question 1: Define a function in programming and explain its main purpose.

Answer: A function is a block of reusable code designed to perform a specific task. Its main purpose is to break down complex problems into smaller, manageable parts and to avoid repeating code.

Question 2: Write a simple pseudocode for a function named 'addNumbers' that takes two numbers as input and returns their sum.

Answer: Function addNumbers(num1, num2): return num1 + num2

Question 3: Describe what happens when a function is called in a program.

Answer: When a function is called, the program jumps to the function's code, executes it with the provided inputs, and then returns to the point where it was called, possibly with a value.

Question 4: Complete the following example of a function in pseudocode that checks if a number is even or odd: Function checkEvenOdd(number): If ________: Output 'Even' Else: Output 'Odd'

Answer: number % 2 == 0

Question 5: Explain the difference between a parameter and an argument in the context of functions.

Answer: A parameter is a variable listed in the function's definition that specifies what inputs the function expects. An argument is the actual value or data passed to the function when it is called.

Question 6: Sketch a flowchart diagram for a function that takes a number as input and outputs whether it is positive, negative, or zero.

Answer: A correct sketch would include a start point, an input box for the number, decision points for checking if the number > 0, < 0, or == 0, and corresponding output messages, ending at an endpoint.

Question 7: Draw a logic circuit that represents a function which outputs true only when both input signals are true.

Answer: A correct sketch would be an AND gate with two inputs and one output, showing the logic flow.

Question 8: Given the following truth table, complete the missing entries: | Input A | Input B | Output | |---------|---------|---------| | 0 | 0 | ? | | 0 | 1 | ? | | 1 | 0 | ? | | 1 | 1 | ? |

Answer: 0, 0, 1, 1

Question 9: Explain why functions are useful in programming.

Answer: Functions help to organize code, reduce repetition, make programs easier to understand and maintain, and allow reuse of code blocks.

Question 10: Write a function in pseudocode that calculates the area of a rectangle given its length and width.

Answer: Function calculateArea(length, width): return length * width

Question 11: Describe what is meant by 'calling a function' in programming.

Answer: Calling a function means executing or invoking the function's code at a specific point in the program, often with specific input arguments.

Question 12: Sketch a diagram illustrating how a function can be called multiple times with different inputs in a program.

Answer: A correct sketch would show a main program flow with multiple function call points, arrows pointing to the function, and different input values passed each time, returning to the main program after each call.