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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Loops and Iteration | 20% | - Break, continue, and pass statements - For loops and while loops - Iterating over sequences |
| Topic 2: Data Structures and Input/Output | 20% | - Lists, tuples, dictionaries, sets - User input and output operations - Basic file handling |
| Topic 3: Control Flow and Decision Making | 20% | - Comparisons and logical operators - Conditional expressions - If, elif, else statements |
| Topic 4: Functions and Modular Programming | 20% | - Variable scope and code reuse - Parameters, arguments, and return values - Defining and calling functions |
| Topic 5: Variables, Data Types, and Basic Operations | 20% | - Variables and assignment - Arithmetic operations and type conversion - Data types: integers, floats, strings, booleans |
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質問 # 26
Which data type is the value 3.14 in Python?
正解：B
解説：
The value 3.14 is afloatbecause it contains a decimal point.
Example:
type(3.14)
This returns:
< class ' float ' >
Python's built-in numeric types include integers and floating-point numbers. A value with a decimal part, such as 3.14, is treated as a floating-point number.
Therefore, the correct answer isB. Float.
質問 # 27
Fix the off-by-one error in this function that should return the first 3 characters of a string.
def first_three(text):
return text[0:2]
正解：
解説：
See the Step by Step Solution below in Explanation.
Explanation:
Step 1: Python string slicing uses this format:
text[start:stop]
Step 2: The start index is included.
Step 3: The stop index is excluded.
Step 4: To return the first 3 characters, start at index 0 and stop at index 3.
Correct code:
def first_three(text):
return text[0:3]
Simplified correct code:
def first_three(text):
return text[:3]
Example:
print(first_three( " Python " ))
Output:
Pyt
質問 # 28
Write a complete function convert_temperature(celsius) that converts Celsius to Fahrenheit using the formula:
F = C * 9/5 + 32.
For example, convert_temperature(0) should return 32.0.
def convert_temperature(celsius):
# TODO: Convert Celsius to Fahrenheit using F = C * 9/5 + 32
pass
正解：
解説：
See the Step by Step Solution below in Explanation.
Explanation:
Step 1: The function receives one parameter named celsius.
Step 2: Use the formula:
F = C * 9 / 5 + 32
Step 3: Return the converted Fahrenheit value.
Correct code:
def convert_temperature(celsius):
return celsius * 9 / 5 + 32
Example:
print(convert_temperature(0))
Output:
32.0
質問 # 29
Write a complete function password_strength(password) that returns " Strong " if the password is at least 8 characters long and contains both letters and numbers, " Weak " otherwise.
For example, password_strength( " abc123def " ) should return " Strong " .
def password_strength(password):
# TODO: Return " Strong " or " Weak " based on password criteria
if len(password) < 8:
return " Weak "
has_letter = False
has_number = False
for char in password:
if char.isalpha():
has_letter = True
elif char.isdigit():
has_number = True
# TODO: Add your return logic here based on has_letter and has_number
pass
正解：
解説：
See the Step by Step Solution below in Explanation.
Explanation:
Step 1: First, check the password length using len(password).
Step 2: If the password has fewer than 8 characters, return " Weak " immediately.
Step 3: Create two Boolean variables: has_letter and has_number.
Step 4: Loop through each character in the password.
Step 5: Use .isalpha() to check for letters and .isdigit() to check for numbers.
Step 6: If the password contains both at least one letter and at least one number, return " Strong " .
Step 7: Otherwise, return " Weak " .
Correct code:
def password_strength(password):
if len(password) < 8:
return " Weak "
has_letter = False
has_number = False
for char in password:
if char.isalpha():
has_letter = True
elif char.isdigit():
has_number = True
if has_letter and has_number:
return " Strong "
else:
return " Weak "
Example:
print(password_strength( " abc123def " ))
print(password_strength( " abcdefgh " ))
print(password_strength( " 12345678 " ))
Output:
Strong
Weak
Weak
質問 # 30
Complete the function format_name(first, last) that takes a first name and last name and returns them combined as " last, first " .
For example, format_name( " John " , " Smith " ) should return " Smith, John " .
def format_name(first, last):
# TODO: Return the name in " last, first " format
pass
正解：
解説：
See the Step by Step Solution below in Explanation.
Explanation:
Step 1: The function receives two string parameters: first and last.
Step 2: The required format is the last name first, followed by a comma, a space, and then the first name.
Step 3: Use string concatenation to combine the values correctly.
Correct code:
def format_name(first, last):
return last + " , " + first
Example:
print(format_name( " John " , " Smith " ))
Output:
Smith, John
質問 # 31
......
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