python practice 4

Which of the following commands will create a list?

• list1 = list()

• list1 = []

• list1 = list([1, 2, 3])

• all of the mentioned

What is the output when we execute list(“hello”)?

• [‘h’, ‘e’, ‘l’, ‘l’, ‘o’]

• [‘hello’]

• [‘llo’]

• [‘olleh’]

Suppose list1 is [4, 2, 2, 4, 5, 2, 1, 0], Which of the following is correct syntax for slicing operation?

• print(list1[2:])

• print(list1[:2])

• print(list1[:-2])

• all of the mentioned

Suppose list1 is [2, 33, 222, 14, 25], What is list1[-1]?

• Error

• None

• 25

• 2

Suppose list1 is [3, 4, 5, 20, 5, 25, 1, 3], what is list1 after list1.reverse()?

• [3, 4, 5, 20, 5, 25, 1, 3]

• [1, 3, 3, 4, 5, 5, 20, 25]

• [25, 20, 5, 5, 4, 3, 3, 1]

• [3, 1, 25, 5, 20, 5, 4, 3]

Suppose listExample is [3, 4, 5, 20, 5, 25, 1, 3], what is list1 after listExample.extend([34, 5])?

• [3, 4, 5, 20, 5, 25, 1, 3, 34, 5]

• [1, 3, 3, 4, 5, 5, 20, 25, 34, 5]

• [25, 20, 5, 5, 4, 3, 3, 1, 34, 5]

• [1, 3, 4, 5, 20, 5, 25, 3, 34, 5]

Suppose listExample is [3, 4, 5, 20, 5, 25, 1, 3], what is list1 after listExample.pop(1)?

• [3, 4, 5, 20, 5, 25, 1, 3]

• [1, 3, 3, 4, 5, 5, 20, 25]

• [3, 5, 20, 5, 25, 1, 3]

• [1, 3, 4, 5, 20, 5, 25]

>>>list1 = [1, 3]

>>>list2 = list1

>>>list1[0] = 4

>>>print(list2)

• [1, 3]

• [4, 3]

• [1, 4]

• [1, 3, 4]

Suppose list1 is [1, 3, 2], What is list1 * 2?

• [2, 6, 4]

• [1, 3, 2, 1, 3]

• [1, 3, 2, 1, 3, 2]

• [1, 3, 2, 3, 2, 1]

lst=[3,4,6,1,2]

lst[1:2]=[7,8]

print(lst)

• [3, 7, 8, 6, 1, 2]

• Syntax error

• [3,[7,8],6,1,2]

• [3,4,6,7,8]