Python Input and Output

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What is the primary characteristic of strings in Python?

They are mutable
They can only be created using single quotes
They can only be created using double quotes
They are immutable (correct)

Which of the following operations can be performed on a list?

Reverse the list
Remove an element at a specific index
Change the data type of the list
All of the above (correct)

What is the purpose of slicing in a list?

To delete elements at a specific index
To insert elements at a specific index
To create a reversed copy of the list
To extract a subset of elements from the list (correct)

What is the correct way to sort a list in descending order?

list.sort(reverse=True) (A) Signup and view all the answers

How do you insert an element at a specific index in a list?

list.insert(index, element) (B) Signup and view all the answers

What is the result of concatenating two lists together?

A new list with all elements from both lists (C) Signup and view all the answers

What is the purpose of using the 'end' parameter in Python's print function?

To change the default newline character to a custom character (C) Signup and view all the answers

What is the default value of the 'end' parameter in Python's print function?

' ' (D) Signup and view all the answers

What is the purpose of using formatted output in Python?

To simplify the print statement by using variables inside curly braces (D) Signup and view all the answers

What is the symbol used to start a comment in Python?

<h1>(D)</h1> Signup and view all the answers

What is the advantage of using comments in Python code?

To make the code more readable and understandable (A) Signup and view all the answers

What is the difference between the two print statements: print('Hello', end=' ') and print('Hello', end='\n')?

The first one prints 'Hello' on the same line, while the second one prints 'Hello' on a new line (B) Signup and view all the answers

What is the purpose of a regular expression?

To match or find other strings or sets of strings (D) Signup and view all the answers

Which Python package is used to work with regular expressions?

re (D) Signup and view all the answers

What does the regular expression pattern \d match?

Digits (B) Signup and view all the answers

What is the opposite of the regular expression pattern \w?

\W (C) Signup and view all the answers

What is the purpose of the ^ metacharacter in regular expressions?

Matches the beginning of a line (D) Signup and view all the answers

What is the output of the following Python program: st = 'Hello World'; print(st.upper())?

HELLO WORLD (A) Signup and view all the answers

What happens to the previous data in a file when new data is written to it?

The previous data gets erased and replaced with the new data (A) Signup and view all the answers

What method is used to write a single string to a text file?

write() (A) Signup and view all the answers

What mode should a file be opened in to append data to it?

'a' mode (B) Signup and view all the answers

What does the tell() method do in a file?

Returns the current position in the file (C) Signup and view all the answers

What is the purpose of the seek() method in a file?

To change the current file position (D) Signup and view all the answers

What is the purpose of the writelines() method?

To write a list of strings to a file (D) Signup and view all the answers

What does the seek() method's second argument specify?

The reference position in the file (A) Signup and view all the answers

What is the purpose of the tell() method in Python?

To get the current file position (B) Signup and view all the answers

What is the result of the following code: os.rename('test1.txt', 'test2.txt')?

The file 'test1.txt' is renamed to 'test2.txt' (A) Signup and view all the answers

What is the purpose of the remove() method in Python?

To delete a file (D) Signup and view all the answers

What is the purpose of the function input_stats as described in the exercise?

To report the longest line in the file (D) Signup and view all the answers

What happens when the seek() method is called with the arguments (0, 0)?

The file position is moved to the beginning of the file (B) Signup and view all the answers