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Basic Python Operations Quiz

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Questions and Answers

What is the output of `print(2 ** 3)`?

8 (correct)

How do you reverse a list in Python?

`list.reverse()` (correct)

`reversed(list)`

`list[::-1]` (correct)

`list.sort()`

How can you check if a number is even in Python?

By using the expression `number % 2 == 0` (correct)

By using the function `is_even(number)`

By using the expression `number / 2 == 1`

By checking if `number` is less than 0

What is the difference between list.append() and list.extend()?

list.append() adds a single element to the end of the list, while list.extend() adds multiple elements. Signup and view all the answers

How do you remove duplicates from a list in Python?

Using the <code>set()</code> function Signup and view all the answers

How can you convert a string to lowercase in Python?

Using the <code>lower()</code> method Signup and view all the answers

How do you check if a string contains only digits?

<code>string.isdigit()</code> Signup and view all the answers

What is the output of `print('Python'[1:4])`?

'yth' Signup and view all the answers

How can you create a dictionary with keys from a list and all values set to zero?

<code>{key: 0 for key in list}</code> Signup and view all the answers

How do you find the length of a list in Python?

Using the <code>len()</code> function Signup and view all the answers

Study Notes

Python Basics

print(2 ** 3) outputs 8, as it uses the exponentiation operator (**).
list.reverse() or list[::-1] are methods to reverse a list in Python.

Number and String Operations

To check if a number is even, use number % 2 == 0.
string.lower() converts a string to lowercase.
Use string.isdigit() to check if a string contains only digits.

Working with Lists

list.append(value) adds a single value to the end of a list, while list.extend(iterable) adds elements from an iterable.
To remove duplicates from a list, convert it to a set using set(list) and back to a list.
print('Python'[1:4]) outputs 'yth', as it slices the string from index 1 to 3.

Dictionaries and Lists

Create a dictionary with keys from a list and values set to zero using {key: 0 for key in keys_list}.
Use len(list) to find the length of a list in Python.

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Description

Test your knowledge of basic Python operations with this quiz. Specifically, this question focuses on the exponentiation operator. Understand how to use power functions in Python and their outputs.