List 3

How do you change the value of a specific item in a Python list?

• Use the replace() method

• Refer to the index number and assign a new value

• Call the change() method on the list

• Use the update() method with the new value

Answer explanation

To change the value of a specific item in a Python list, refer to the index number and assign a new value.

What happens if you insert more items than you replace in a Python list?

• A syntax error occurs

• The extra items are discarded

• The list remains unchanged

• The new items will be inserted and the remaining items will move accordingly

Answer explanation

If you insert more items than you replace in a Python list, the new items will be inserted, and the remaining items will move accordingly.

To insert a new list item without replacing any existing values, which method should be used?

• append()

• insert()

• push()

• add()

Answer explanation

The correct method to insert a new list item without replacing any existing values is to use the insert() method.

What is the result of inserting an item into a Python list using the insert() method?

• The list length remains the same

• The inserted item replaces the first item

• The list will now contain one more item

• The list will be sorted automatically

Answer explanation

The list will now contain one more item

How can you change the values of items within a specific range in a Python list?

• Use the set() method with the new values

• Use the replace() method with a start and end parameter

• Call the update() method with a dictionary of new values

• Define a list with new values and refer to the range of index numbers

Answer explanation

The correct way to change values within a specific range in a Python list is to define a list with new values and refer to the range of index numbers.

What happens if you insert fewer items than you replace in a Python list?

• The new items will be inserted and the remaining items will move accordingly

• A ValueError is raised

• The operation will be ignored

• The list will automatically remove excess items

Answer explanation

If you insert fewer items than you replace in a Python list, the new items will be inserted and the remaining items will move accordingly.

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

• push()

• extend()

• append()

• insert()

Answer explanation

The correct method to add an item to the end of a Python list is 'append()'. It adds the specified element at the end of the list.

What is the correct way to change the second item in a Python list named 'thislist' to 'blackcurrant'?

• thislist[1] = 'blackcurrant'

• thislist[2] = 'blackcurrant'

• thislist.update(1, 'blackcurrant')

• thislist.change(1, 'blackcurrant')

Answer explanation

The correct way to change the second item in a Python list named 'thislist' to 'blackcurrant' is by using thislist[1] = 'blackcurrant'.

How would you replace the first item in a list with 'strawberry'?

• Use the append() method to add 'strawberry' at the beginning

• Directly assign 'strawberry' to the first position

• Remove the first item and then insert 'strawberry'

• Call the replace() method for the first item

Answer explanation

Directly assign 'strawberry' to the first position

What is the effect of using the insert() method on the list length?

• Doubles in size

• Remains unchanged

• Increases by one

• Decreases by one

Answer explanation

Using the insert() method on a list increases the list length by one as it adds a new element at the specified index.