PYTHON SETS

Which of the following are true for objects of Python’s set type

• The order of elements in a set is significant.

• A set may contain elements that are mutable.

• A given element can’t appear in a set more than once.

• Sets are mutable.

Which of the following is not the correct syntax for creating a set?

• set([[1,2],[3,4]])

• set([1,2,2,3,4])

• set((1,2,3,4))

• {1,2,3,4}

Which of the following statements is used to create an empty set?

• {}

• set()

• []

• ()

If a={5,6,7,8}, which of the following statements is false?

• print(len(a))

• print(min(a))

• a.remove(5)

• a[2]=45

Which of these about a frozenset is not true?

• Mutable data type

• Allows duplicate values

• Data type with unordered values

• Immutable data type

Suppose t = (1, 2, 4, 3), which of the following is incorrect?

• print(t[3])

• t[3] = 45

• print(max(t))

• print(len(t))

t = (1, 2)

print(2*t)

• (1, 2, 1, 2)

• [1, 2, 1, 2]

• (1, 1, 2, 2)

• [1, 1, 2, 2]

What type of data is: a=[(1,1),(2,4),(3,9)]?

• Array of tuples

• List of tuples

• Tuples of lists

• Invalid type

Which of the following statements create a dictionary?

• d = {}

• d = {“john”:40, “peter”:45}

• d = {40:”john”, 45:”peter”}

• All

Suppose d = {“john”:40, “peter”:45}, to delete the entry for “john” what command do we use?

• d.delete(“john”:40)

• d.delete(“john”)

• del d[“john”]

• del d(“john”:40)