Study the code below. Identify where casting is used and why it might be useful in this context. quantity = input(“Enter number of products: “) total_cost = input(“Enter total cost of products: “) average_cost = float(total_cost) / int(quantity) print(“Average Cost:”, average_cost)
Consider the variables firstName storing “John” and lastName storing “Smith”. Write a line of code in either OCR’s ERL or a high level language of your choice, to concatenate firstName and lastName with a space between them and store the result in a new variable fullName.
String Concatenation (2 marks) Read More »
Given the string s = “ComputerScience”, explain what s.substring(3,6) would output. In this question the string manipulation method .substring(x , i) should be interpreted as: x is starting index, i is number of characters, index begins at 0)
Substrings (3 marks) Read More »
(a) What is the purpose of the newFile(“myFile.txt”) function in file handling? (b) Describe what happens when the open(“myFile.txt”) function is executed in terms of file handlers.
Basic File Operations (2 marks) Read More »
Consider a program that tracks temperature changes over time. Explain why a ‘real’ data type would be more suitable than an ‘integer’ for storing these temperatures.
Integer vs Real. (2 marks) Read More »
In a shopping cart application, items have prices and quantities. What data types would you use for the item price and quantity? Justify your choices.
Data Type Choice. (2 marks) Read More »
What programming construct is primarily demonstrated in the code snippet shown below? print(“Hello, World!”) x = 10 + 5 print(x)
Programming Construct Identification 3 (1 mark) Read More »
What programming construct(s) is/are used in the code snippet shown below? while not finished: task = input(“Enter a new task: “) if task == “exit”: finished = True else: task_list.append(task)
Programming Construct Identification 4 (2 mark) Read More »
Identify the most appropriate data type for each of the following variables in a program. (1 mark each) a) The age of a student in years. b) The average grade in a class, e.g., 67.5%. c) The status of a light bulb (on or off). d) A person’s middle initial.
Most Appropriate Data Type. (4 marks) Read More »
Explain the result of the Boolean expression (NOT A AND B) OR (A AND NOT B) where A = True and B = False.
Boolean Logic. (2 marks) Read More »
