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| Section | Objectives |
|---|---|
| Data Structures | - String Manipulation - Dictionaries - Tuples - Sets - Lists and List Operations |
| Python Fundamentals | - Variables and Data Types - Operators and Expressions - Input/Output Operations - Type Conversion |
| File Handling and Exceptions | - Custom Exceptions - Exception Handling (try, except, finally) - Reading and Writing Files |
| Testing and Debugging | - Trace Errors - Unit Testing Concepts - Debugging Techniques |
| Control Structures | - Loop Control (break, continue, pass) - Nested Conditionals and Loops - Loops (for, while) - Conditional Statements (if, elif, else) |
| Functions | - Scope (local and global) - Return Values - Recursion - Parameters and Arguments - Function Definition and Call |
| Object-Oriented Programming | - Encapsulation - Constructors (__init__) - Classes and Objects - Attributes and Methods - Inheritance |
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NEW QUESTION # 46
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 # 47
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]
Answer:
Explanation:
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
NEW QUESTION # 48
Which for loop correctly iterates through a list of student names?
Answer: B
Explanation:
The correct Python for loop syntax uses the keyword in.
Correct code:
for name in [ ' Alice ' , ' Bob ' , ' Carol ' ]:
print(name)
This loop processes each name in the list one at a time. Python's documentation explains that a for statement iterates over the items of a sequence or iterable.
Therefore, the correct answer isA. for name in [ ' Alice ' , ' Bob ' , ' Carol ' ]:.
NEW QUESTION # 49
In Python, what must follow the in keyword in a for loop?
Answer: A
Explanation:
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.
NEW QUESTION # 50
What sequence of steps is required to execute a Python script from a text editor using the terminal on a Windows device?
Answer: B
Explanation:
To run a Python script from a text editor using the terminal on Windows, the file should first be saved with the .py extension. Then, the terminal is opened, and the script is executed using the Python command followed by the filename.
Example:
python filename.py
The official Python documentation explains that when the interpreter is called with a filename argument, it reads and executes the script from that file. On Windows, the python command can be used from a terminal after Python is installed and configured correctly.
Therefore, the correct answer is A. Save file > open terminal > type python filename.py.
NEW QUESTION # 51
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