list 7

Which function is used to determine the length of a list in Python?

• len()

• size()

• length()

• count()

Answer explanation

The 'len()' function is used to determine the length of a list in Python, making it the correct choice among the options provided.

What does list comprehension provide in Python?

• A technique to import modules

• A method to iterate over dictionaries

• A way to write conditional statements

• A concise way to create lists

Answer explanation

List comprehension in Python provides a concise way to create lists, making it easier and more efficient to generate lists with specific criteria or transformations.

Which method is used to add an item to the end of a list?

• insert()

• extend()

• append()

• add()

Answer explanation

The method used to add an item to the end of a list is 'append()'. This method specifically adds the item to the end of the list without specifying an index.

How can you loop through a list's items by referring to their index number?

• Using the index() method

• Using a for loop with the append() method

• Using a for loop with range() and len()

• Using a while loop only

Answer explanation

The correct way to loop through a list's items by referring to their index number is by using a for loop with range() and len(). This allows you to iterate over the list using the index values.

Which of the following is a correct way to create a list in Python?

• thislist = ("apple", "banana", "cherry")

• thislist = {"name": "apple", "color": "green"}

• thislist = ["apple", "banana", "cherry"]

• thislist = {"apple", "banana", "cherry"}

Answer explanation

The correct way to create a list in Python is by using square brackets, like thislist = ["apple", "banana", "cherry"].

What is the output of printing the first item in the list ['apple', 'banana', 'cherry']?

• apple

• cherry

• ['apple', 'banana', 'cherry']

• banana

Answer explanation

The correct output is 'apple' because the first item in the list ['apple', 'banana', 'cherry'] is 'apple'.

Which method can be used to remove an item from a list?

• pop()

• remove()

• discard()

• delete()

Answer explanation

The 'remove()' method can be used to remove an item from a list, making it the correct choice among the given options.

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

• Using the insert() method

• Using the append() method

• Using the add() method

• Using the put() method

Answer explanation

To insert an item at a specific index in a list, you should use the insert() method.

Which of the following is not a valid list method in Python?

• copy()

• reverse()

• sort()

• collect()

Answer explanation

The 'collect()' method is not a valid list method in Python. The correct choice is 'collect()'. The other methods - copy(), reverse(), and sort() - are valid list methods.

What does the range() function return?

• A list of characters

• A single number

• A boolean value

• A sequence of numbers

Answer explanation

The range() function returns a sequence of numbers, not a list of characters, a single number, or a boolean value.