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| Section | Objectives |
|---|---|
| Functions | - Return Values - Recursion - Function Definition and Call - Scope (local and global) - Parameters and Arguments |
| Testing and Debugging | - Debugging Techniques - Unit Testing Concepts - Trace Errors |
| File Handling and Exceptions | - Reading and Writing Files - Exception Handling (try, except, finally) - Custom Exceptions |
| Data Structures | - Lists and List Operations - Tuples - Sets - String Manipulation - Dictionaries |
| Object-Oriented Programming | - Inheritance - Classes and Objects - Attributes and Methods - Constructors (__init__) - Encapsulation |
| Control Structures | - Loop Control (break, continue, pass) - Nested Conditionals and Loops - Conditional Statements (if, elif, else) - Loops (for, while) |
| Python Fundamentals | - Type Conversion - Input/Output Operations - Operators and Expressions - Variables and Data Types |
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NEW QUESTION # 38
Which Python data structure cannot be modified after creation?
Answer: C
Explanation:
Atupleis immutable, which means it cannot be changed after it is created.
Example:
coordinates = (10, 20)
After this tuple is created, its elements cannot be modified directly. Python's data model documentation explains that tuples are immutable, while lists and dictionaries are mutable.
Therefore, the correct answer isC. Tuple.
NEW QUESTION # 39
Which Python data structure automatically prevents duplicate values from being stored?
Answer: C
Explanation:
Asetstores only unique elements. If duplicate values are added, Python keeps only one copy.
Example:
numbers = {1, 2, 2, 3}
print(numbers)
Output:
{1, 2, 3}
Python's data structures documentation describes sets as collections with no duplicate elements.
Therefore, the correct answer isD. Set.
NEW QUESTION # 40
Complete the function is_positive(number) that returns True if the number is greater than 0, and False otherwise.
def is_positive(number):
# TODO: Return True if number > 0, False otherwise
pass
Answer:
Explanation:
See the Step by Step Solution below in Explanation.
Explanation:
Step 1: The function receives one parameter named number.
Step 2: The condition number > 0 checks whether the number is positive.
Step 3: In Python, this comparison already returns either True or False.
Correct code:
def is_positive(number):
return number > 0
Example:
print(is_positive(5))
print(is_positive(-2))
print(is_positive(0))
Output:
True
False
False
NEW QUESTION # 41
What does the string method ' ' .join() return when applied to the list [ ' Hello ' , ' World ' ]?
Answer: D
Explanation:
The string method join() combines the strings in an iterable using the string before .join() as the separator.
In this question, the separator is an empty string:
' ' .join([ ' Hello ' , ' World ' ])
Because the separator is empty, Python joins ' Hello ' and ' World ' directly together with no space or comma between them.
Result:
' HelloWorld '
The official Python documentation defines str.join() as returning a string made by joining the strings in the given iterable.
Therefore, the correct answer is B. ' HelloWorld ' .
NEW QUESTION # 42
In the code for item in my_list:, what does item represent?
Answer: A
NEW QUESTION # 43
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