Data Analytics Internship Quiz 13

6. What is the output of the following code snippet?

python

my_tuple = (1, 2, 3)

print(my_tuple[1])

• 1

• 2

• 3

• Error: Tuples are not subscriptable.

What is a dictionary in Python?

• A mutable data structure that stores elements in key-value pairs.

• An immutable data structure that stores elements in key-value pairs.

• 
  A data structure that stores elements only as values.

• 
  
  A data structure that stores elements only as keys.

How do you access the value associated with the key 'age' in the dictionary person?

person = {'name': 'John', 'age': 30, 'city': 'New York'}

• person['age']

• person.get('age')

• person.value('age')

• person.age

Which of the following methods is used to remove an item from a dictionary in Python?

• remove()

• delete()

• discard()

• popitem()

What happens if you try to access a key in a dictionary that doesn't exist?

• Python raises a ValueError.

• Python returns None.

• Python raises a KeyError.

• Python returns an empty dictionary.

Which of the following operations is used to add a new key-value pair to an existing dictionary in Python?

• append()

• insert()

• add()

• update()

How do you iterate through all key-value pairs in a dictionary?

• for key, value in my_dict.items():

• for item in my_dict:

• for key in my_dict:

• for value in my_dict.values()

What is the output of the following code snippet?

python

my_dict = {'a': 1, 'b': 2, 'c': 3}

print(my_dict.pop('b'))

• {'a': 1, 'c': 3}
  

• 2

• 
  KeyError
  

• None

Which method is used to get a list of all keys in a dictionary?

• keys()

• get_keys()

• list()

• All of the above

What is a tuple in Python?

• A mutable data structure that stores elements in an ordered sequence.
  
  

• An immutable data structure that stores elements in an ordered sequence.

• A data structure that stores elements in key-value pairs.

• A data structure that stores elements only as values.