Dictionary In Python MCQ

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• Which of the following isn't true about dictionary keys?
  ক

  More than one key isn't allowed

  খ

  Keys must be immutable

  গ

  Keys must be integers

  ঘ

  When duplicate keys encountered, the last assignment wins
• Suppose d = {"john":40, "peter":45}, to delete the entry for "john" what command do we use?
  ক

  d.delete("john":40)

  খ

  d.delete("john")

  গ

  del d

  ঘ

  del d("john":40)
• The following Python code is invalid.<br><pre><code class="python">class demo(dict): def __test__(self,key): return [
  ক

  a = demo()a = 7print(a)</code></pre>

  খ

  <p><span>A. True

  গ

  [</span> False
• Suppose d = {"john":40, "peter":45}. To obtain the number of entries in dictionary which command do we use?
  ক

  d.size()

  খ

  len(d)

  গ

  size(d)

  ঘ

  d.len()
• Which of the statements about dictionary values if false?
  ক

  More than one key can have the same value

  খ

  The values of the dictionary can be accessed as dict

  গ

  Values of a dictionary must be unique

  ঘ

  Values of a dictionary can be a mixture of letters and numbers
• What is the output of the following code:<br><code>my_dict = {'a': 1, 'b': 2}<br>my_dict.popitem()<br>print(my_dict)</code>
  ক

  {'a': 1, 'b': 2}

  খ

  {}

  গ

  {'b': 2}

  ঘ

  {1: 'a', 2: 'b'}
• What is the output of the following code:<br><code>my_dict = {'a': 1, 'b': 2}<br>new_dict = my_dict.copy()<br>print(new_dict)</code>
  ক

  {'a': 1, 'b': 2}

  খ

  {'a': 1, 'b': 2, 'a': 1, 'b': 2}

  গ

  {'a': 1, 'b': 2, 'a': 2, 'b': 1}

  ঘ

  {'a': 2, 'b': 1}
• What is the output of the following code:<br><code>my_dict = {'a': 1, 'b': 2, 'c': 3}<br>my_dict.values()<br>print(my_dict)</code>
  ক

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

  খ

  {1, 2, 3}

  গ

  {'values': }
• What is the output of the following code:<br><code>my_dict = {'a': 1, 'b': 2, 'c': 3}<br>print(my_dict.get('d', 0))</code>
  ক

  0

  খ

  'd'

  গ

  3

  ঘ

  'a'
• What is the output of the following code:<br><code>my_dict = {'a': 1, 'b': 2, 'c': 3}<br>my_dict.pop('b')<br>print(my_dict)</code>
  ক

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

  খ

  {'a': 1, 'c': 3}

  গ

  {'a': 1, 'b': 2}

  ঘ

  {'c': 3}
• What is the purpose of the values() method for dictionaries?
  ক

  Returns a list of all values in the dictionary

  খ

  Returns a list of all keys in the dictionary

  গ

  Returns a list of key-value pairs in the dictionary

  ঘ

  Returns a list of items in the dictionary
• In Python, how can you create an empty dictionary?
  ক

  dict()

  খ

  {}

  গ

  empty_dict()

  ঘ

  new_dict()
• How can you add a new key-value pair to a dictionary in Python?
  ক

  my_dict = new_value

  খ

  add('new_key', new_value)

  গ

  insert('new_key', new_value)

  ঘ

  append('new_key', new_value)
• What is the purpose of the popitem() method for dictionaries?
  ক

  Removes and returns the last key-value pair in the dictionary

  খ

  Removes and returns a random key-value pair from the dictionary

  গ

  Removes and returns the first key-value pair in the dictionary

  ঘ

  Removes and returns the specified key-value pair from the dictionary
• In Python, how can you get a list of all keys in a dictionary?
  ক

  keys()

  খ

  get_keys()

  গ

  all_keys()

  ঘ

  list_keys()
• What is the purpose of the fromkeys() method for dictionaries?
  ক

  Creates a new dictionary with specified keys and a default value

  খ

  Adds new keys to the dictionary

  গ

  Copies keys and values from another dictionary

  ঘ

  Removes specified keys from the dictionary
• What is the purpose of the clear() method for dictionaries?
  ক

  Removes all key-value pairs from the dictionary

  খ

  Adds a key-value pair to the dictionary

  গ

  Removes the last key-value pair

  ঘ

  Deletes the dictionary
• Which method is used to create a shallow copy of a dictionary?
  ক

  copy()

  খ

  clone()

  গ

  duplicate()

  ঘ

  replicate()
• What is the purpose of the items() method for dictionaries?
  ক

  Returns a list of key-value pairs in the dictionary

  খ

  Returns a list of keys in the dictionary

  গ

  Returns a list of values in the dictionary

  ঘ

  Returns a list of items in the dictionary
• In Python, how can you remove all key-value pairs from a dictionary?
  ক

  clear()

  খ

  remove_all()

  গ

  delete_all()

  ঘ

  discard_all()
• Which method is used to get a list of all values in a dictionary?
  ক

  values()

  খ

  get_values()

  গ

  all_values()

  ঘ

  list_values()
• What is the purpose of the keys() method for dictionaries?
  ক

  Returns a list of all keys in the dictionary

  খ

  Returns a list of all values in the dictionary

  গ

  Returns a list of all items in the dictionary

  ঘ

  Returns a list of all keys and values in the dictionary
• What method is used to update the values of a dictionary with the values from another dictionary?
  ক

  update()

  খ

  set()

  গ

  add()

  ঘ

  merge()
• In Python, how can you check if a key exists in a dictionary?
  ক

  in keyword

  খ

  exists()

  গ

  contains()

  ঘ

  check()
• Which method is used to remove a key-value pair from a dictionary?
  ক

  pop()

  খ

  remove()

  গ

  delete()

  ঘ

  discard()
• What is the purpose of the dict() constructor in Python?
  ক

  Creates a new dictionary

  খ

  Converts a list to a dictionary

  গ

  Converts a tuple to a dictionary

  ঘ

  Converts a string to a dictionary
• In Python, how can you get a list of all key-value pairs in a dictionary?
  ক

  items()

  খ

  get_items()

  গ

  all_items()

  ঘ

  list_items()
• What does the len() function do when applied to a dictionary?
  ক

  Returns the number of key-value pairs in the dictionary

  খ

  Returns the sum of all values

  গ

  Returns the length of the longest key

  ঘ

  Returns the length of the longest value
• What method is used to check if a key exists in a dictionary, and if not, add it with a default value?
  ক

  setdefault()

  খ

  addkey()

  গ

  insert()

  ঘ

  newkey()
• Which of the following data types in Python is used to store key-value pairs?
  ক

  Dictionary

  খ

  List

  গ

  Tuple

  ঘ

  Set