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| Section | Weight | Objectives |
|---|---|---|
| Functions and Modular Programming | 20% | - Variable scope and code reuse - Parameters, arguments, and return values - Defining and calling functions |
| Variables, Data Types, and Basic Operations | 20% | - Variables and assignment - Data types: integers, floats, strings, booleans - Arithmetic operations and type conversion |
| Data Structures and Input/Output | 20% | - Lists, tuples, dictionaries, sets - Basic file handling - User input and output operations |
| Loops and Iteration | 20% | - Break, continue, and pass statements - Iterating over sequences - For loops and while loops |
| Control Flow and Decision Making | 20% | - Conditional expressions - Comparisons and logical operators - If, elif, else statements |
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質問 # 43
Complete the function calculate_tip(bill, tip_percent) that calculates and returns the tip amount based on the bill and tip percentage.
For example, calculate_tip(50, 20) should return 10.0.
def calculate_tip(bill, tip_percent):
# TODO: Calculate and return the tip amount
pass
正解：
解説：
See the Step by Step Solution below in Explanation.
Explanation:
Step 1: The function receives two parameters: bill and tip_percent.
Step 2: Convert the percentage into a decimal by dividing tip_percent by 100.
Step 3: Multiply the bill amount by that decimal value.
Correct code:
def calculate_tip(bill, tip_percent):
return bill * tip_percent / 100
Example:
print(calculate_tip(50, 20))
Output:
10.0
質問 # 44
In Python, what must follow the in keyword in a for loop?
正解：B
解説：
In a Python for loop, the in keyword is followed by an iterable object, such as a list, string, tuple, dictionary, set, or range() object.
Example:
for name in [ " Alice " , " Bob " , " Carol " ]:
print(name)
Here, [ " Alice " , " Bob " , " Carol " ] is the iterable object. Python's documentation explains that a for statement iterates over the items of a sequence or other iterable object.
Therefore, the correct answer isB. An iterable object.
質問 # 45
Write a complete function calculate_discount(price, discount_percent) that calculates and returns the final price after applying a discount percentage.
For example, calculate_discount(75, 20) should return 60.0.
def calculate_discount(price, discount_percent):
# TODO: Calculate and return the final price after discount
pass
正解：
解説：
See the Step by Step Solution below in Explanation.
Explanation:
Step 1: The function receives the original price and the discount_percent.
Step 2: Convert the discount percentage into a decimal by dividing by 100.
Step 3: Subtract the discount from 1 to find the remaining price percentage.
Step 4: Multiply the original price by the remaining percentage.
Correct code:
def calculate_discount(price, discount_percent):
return price * (1 - discount_percent / 100)
Example:
print(calculate_discount(75, 20))
Output:
60.0
質問 # 46
Modify the function greet_with_default(name) by adding a default value of " World " to the name parameter so it can be called with or without an argument.
def greet_with_default(name):
# TODO: Add a default value of " World " to the name parameter
return " Hello " + name
正解：
解説：
See the Step by Step Solution below in Explanation.
Explanation:
Step 1: A default parameter value allows a function to be called even when no argument is provided.
Step 2: The default value should be added in the function header.
Step 3: The parameter name should have the default value " World " .
Correct code:
def greet_with_default(name= " World " ):
return " Hello " + name
Example:
print(greet_with_default())
print(greet_with_default( " Alice " ))
Output:
Hello World
Hello Alice
質問 # 47
Which type of loop repeatedly checks a condition to determine whether to continue?
正解：B
解説：
Awhile looprepeatedly executes a block of code as long as its condition remains true.
Example:
count = 1
while count < = 3:
print(count)
count += 1
In this example, Python checks the condition count < = 3 before each loop iteration. If the condition is true, the loop continues. When the condition becomes false, the loop stops.
A for loop is usually used to iterate over a sequence, such as a list, string, or range. Python does not have a built-in repeat loop construct.
Therefore, the correct answer isB. while loop.
質問 # 48
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