Python-Day-3

What will be the output of this?

s = {1,9,3,4,5,5,4}

print(s)

• 1 3 5 9

• 1 3 5 4 9

• 1 3 4 5 9

• 1 3 4 5

  9

Answer explanation

set is a data type that stores elements in ascending order and duplicates are not allowed.

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

• { }

• []

• set()

• ()

>>> a={5,4}

>>> b={1,2,4,5}

>>> a<b

what will the output?

• {1,2}

• false

• True

• False

Answer explanation

Explanation:

a<b returns True if a is a proper subset of b.

>>> a={5,6,7,8}

>>> b={7,5,6,8}

>>> a==b

what will be the output?

• True

• False

• NOTA

Answer explanation

It is possible to compare sets

Which of the following is not a declaration of the dictionary?

• {1: ‘A’, 2: ‘B’}

• { }

• dict([[1,”A”],[2,”B”]])

• {1,”A”,2”B”}

a={1:"A",2:"B",3:"C"}

print(a.get(1,4))

• A

• 4

• Error

• NONE

a={1:5,2:3,3:4}

a.pop(3)

print(a)

• {1: 5}

• {1: 5, 3: 4}

• Error

• {1: 5, 2: 3}

Answer explanation

: pop() method removes the key-value pair for the key mentioned in the pop() method.

>>> a={1:"A",2:"B",3:"C"}

>>> a.items()

• dict_items([(‘A’), (‘B’), (‘C’)])

• dict_items([(1,2,3)])

• Error

• dict_items([(1, ‘A’), (2, ‘B’), (3, ‘C’)])

Answer explanation

The method items() returns list of tuples with each tuple having a key-value pair.

a = input("Enter a number : ")

print(a, type(a))

What will be the output if the input is 3

• 4 <class 'int>

• 3 <class 'int'>

• 3 <class 'str'>

• 5 <class 'str'>

print(chr(48), ord('a'))

what will be the output?

• 0 98

• 0 97

• 0

  97

• 97 0