python dictionary and set

The code snippet above outputs

• error

• None

• NaN

• -1

The code above prints

• Math

  Physics

  Chemistry

  English

• 4

  3.8

  3.6

  3.7

• None

  None

  None

  None

• NaN

  NaN

  NaN

  NaN

What is the output of the program above

• e

• y

• t

• g

The output of the code above is

• [101, 102, 103, 104]

• [3.6, 3.7, 3.8, 4]

What is the output of the code above

• [3.6, 3.7, 3.8, 4]

• [101, 102, 103, 104]

Which of the following code deletes the key 103 and its value

• del grades[103]

• grades.pop(103)

• del grades["103"]

• grades.pop("103")

• 

Square brackets in an assignment statement will create which type of data structure?

( s=[] )

• List

• Queue

• Dictionary

• Set

What will be the output of the following Python code?

nums = set([1,1,2,3,3,3,4,4])

print(len(nums))

• 7

• Error, invalid syntax for formation of set

• 4

• 8

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

• { }

• set()

• [ ]

• ( )

If a={5,6,7}, what happens when a.add(5) is executed?

• a={5,5,6,7}

• a={5,6,7}

• Error as there is no add function for set data type

• Error as 5 already exists in the set