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| Section | Objectives |
|---|---|
| Data Structures | - String Manipulation - Tuples - Sets - Lists and List Operations - Dictionaries |
| Object-Oriented Programming | - Constructors (__init__) - Inheritance - Classes and Objects - Attributes and Methods - Encapsulation |
| Testing and Debugging | - Unit Testing Concepts - Debugging Techniques - Trace Errors |
| Control Structures | - Loops (for, while) - Conditional Statements (if, elif, else) - Nested Conditionals and Loops - Loop Control (break, continue, pass) |
| Functions | - Recursion - Function Definition and Call - Return Values - Parameters and Arguments - Scope (local and global) |
| Python Fundamentals | - Variables and Data Types - Operators and Expressions - Type Conversion - Input/Output Operations |
| File Handling and Exceptions | - Exception Handling (try, except, finally) - Reading and Writing Files - Custom Exceptions |
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NEW QUESTION # 45
Write a complete function calculate_average(grades) that takes a list of grades and returns the average as a float.
For example, calculate_average([85, 92, 78]) should return 85.0.
def calculate_average(grades):
# TODO: Calculate and return the average grade as a float
pass
Answer:
Explanation:
See the Step by Step Solution below in Explanation.
Explanation:
Step 1: The function receives one parameter named grades, which is a list of numbers.
Step 2: Use sum(grades) to add all the grades together.
Step 3: Use len(grades) to count how many grades are in the list.
Step 4: Divide the total by the number of grades.
Correct code:
def calculate_average(grades):
return sum(grades) / len(grades)
Example:
print(calculate_average([85, 92, 78]))
Output:
85.0
NEW QUESTION # 46
Fix the indexing error in this function that should return the last character of a string.
def get_last_character(text):
return text[len(text)]
Answer:
Explanation:
See the Step by Step Solution below in Explanation.
Explanation:
Step 1: Python string indexing starts at 0.
Step 2: The last valid index of a string is len(text) - 1, not len(text).
Step 3: Python also allows negative indexing, where -1 means the last character.
Step 4: Replace text[len(text)] with text[-1] .
Correct code:
def get_last_character(text):
return text[-1]
Example:
print(get_last_character( " Python " ))
Output:
n
NEW QUESTION # 47
What distinguishes a terminal-based Python environment from other development environments?
Answer: A
Explanation:
A terminal-based Python environment uses atext-based command line interface. In this environment, the user types commands directly into a terminal or command prompt.
For example, a user may start Python by typing:
python
When Python is started from a terminal, the interpreter can run in interactive mode, where it displays prompts such as > > > and waits for the user to enter Python commands. The official Python documentation explains that when commands are read from a terminal, the interpreter is in interactive mode.
A terminal-based environment is not mainly identified by graphical user interface elements, internet connectivity, or automatic file saving.
Therefore, the correct answer isC. Text-based command line interface.
NEW QUESTION # 48
Which Python data structure contains only unique elements and does not support indexing?
Answer: B
Explanation:
A set is a Python data structure that stores only unique elements. This means duplicate values are automatically removed.
Example:
numbers = {1, 2, 2, 3}
print(numbers)
Output:
{1, 2, 3}
The duplicate value 2 appears only once in the set.
Sets are also unordered, so they do not support indexing like lists or tuples do. For example, numbers[0] would cause an error because sets are not accessed by position.
The official Python documentation describes sets as unordered collections with no duplicate elements.
Therefore, the correct answer is D. Set.
NEW QUESTION # 49
What happens when the command python is entered in a terminal without a filename?
Answer: C
Explanation:
When the command python is entered in a terminal without a filename, Python starts aninteractive Python session, also called interactive mode.
In interactive mode, Python displays the primary prompt:
> > >
The user can then type Python statements directly, such as:
> > > 2 + 3
5
The official Python documentation explains that when commands are read from a terminal, the interpreter is in interactive mode and prompts for the next command.
Python does not automatically run the most recent file, open a file browser, or necessarily display an error when started this way.
Therefore, the correct answer isC. An interactive Python session starts.
NEW QUESTION # 50
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