ExamAdept

How can you create a list containing only the unique elements from another list in Python?

A:

list.distinct()

B:

list.unique()

C:

list(set(list))

D:

list.remove_duplicates()

Answer: C

Converting a list to a set removes duplicates, and then converting it back to a list creates a new list with unique elements.

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How can you find the frequency of each element in a list in Python?

A:

list.count(element)

B:

list.frequency(element)

C:

dict(Counter(list))

D:

list.freq(element)

Answer: C

Using Counter and dict() can create a dictionary with element frequencies.

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What will the list.extend([7, 8, 9]) method do?

A:

Adds a single element [7, 8, 9] to the list.

B:

Adds individual elements 7, 8, 9 to the end of the list.

C:

Merges the list with [7, 8, 9] creating a new list.

D:

Inserts [7, 8, 9] at the beginning of the list.

Answer: B

The extend() method adds individual elements from the iterable to the end of the list.

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How can you reverse the order of elements in a list without modifying the original list?

A:

reversed_list = list.reverse()

B:

reversed_list = list[::-1]

C:

reversed_list = list.reverse_copy()

D:

reversed_list = list.reverse(True)

Answer: B

Using slicing [::-1] creates a new list with the reversed order of elements.

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What does the list.remove(42) method do in Python?

A:

Removes the element with the value 42.

B:

Removes the first occurrence of 42.

C:

Raises an error if the element 42 is not found.

D:

Removes all occurrences of 42.

Answer: B

The remove() method in Python lists removes the first occurrence of a specific element.

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Questions for: Lists