ExamAdept

What is the correct way to create a new list by multiplying each element of an existing list by 2 in Python?

A:

new_list = list * 2

B:

new_list = [element * 2 for element in old_list]

C:

new_list = old_list.multiply(2)

D:

new_list = old_list * 2

Answer: B

The correct way to create a new list by multiplying each element of an existing list by 2 is using a list comprehension as shown in option B.

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Which method is used to remove the first occurrence of a specific element from a list?

A:

remove(element)

B:

delete(element)

C:

pop(element)

D:

discard(element)

Answer: A

The remove(element) method is used to remove the first occurrence of a specific element from a list.

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What is the purpose of the count method in Python lists?

A:

To count the number of occurrences of a specific element.

B:

To count the total number of elements in the list.

C:

To count the number of unique elements in the list.

D:

To count the number of elements satisfying a condition.

Answer: A

The count method in Python lists is used to count the number of occurrences of a specific element.

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How can you reverse the order of elements in a list in Python?

A:

reverse()

B:

list.reverse()

C:

reversed(list)

D:

list.reversed()

Answer: B

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

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Which of the following methods is used to insert an element at a specific index in a list?

A:

add(index, element)

B:

insert(index, element)

C:

append(index, element)

D:

push(index, element)

Answer: B

The insert(index, element) method is used to insert an element at a specific index in a list.

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Questions for: Lists