ExamAdept

How can you remove all occurrences of a specific element from a list in Python?

A:

list.remove_all(element)

B:

list.delete(element)

C:

list.remove(element, all=True)

D:

list = [x for x in list if x != element]

Answer: D

To remove all occurrences of a specific element, you can use a list comprehension to filter out the unwanted element.

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What does the list.count() method return in Python?

A:

The total number of elements in the list.

B:

The number of occurrences of a specific element.

C:

The sum of all elements in the list.

D:

The index of the last occurrence of a specific element.

Answer: B

The count() method returns the number of occurrences of a specific element in a list.

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What is the purpose of the list.reverse() method in Python?

A:

Sorts the list in ascending order.

B:

Reverses the order of elements in the list.

C:

Removes duplicate elements from the list.

D:

Appends the list to itself.

Answer: B

The reverse() method in Python lists is used to reverse the order of elements in-place.

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How can you check if a list contains only numeric elements in Python?

A:

all(isinstance(x, int) for x in my_list)

B:

my_list.isnumeric()

C:

numeric(my_list)

D:

if my_list.has_numbers()

Answer: A

Using all() with isinstance() checks if all elements in the list are of type int.

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What will the list.pop(2) method do?

A:

Removes the element at index 2.

B:

Removes the element with the value 2.

C:

Raises an error because index 2 does not exist.

D:

Removes all occurrences of the value 2.

Answer: A

The pop() method removes and returns the element at the specified index.

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Questions for: Lists