ExamAdept

How do you remove all items from a dictionary?

A:

dictionary.delete_all()

B:

dictionary.clear()

C:

dictionary.remove_all()

D:

dictionary.erase()

Answer: B

The clear() method removes all items from a dictionary.

📖

What is the result of the expression dictionary.get('key', 'default')?

A:

Raises a KeyError if 'key' is not present.

B:

Returns the value of 'key' if present, otherwise returns 'default'.

C:

Returns 'default' if 'key' is not present.

D:

Returns a tuple containing 'key' and its value.

Answer: B

The get() method returns the value for 'key' if present, otherwise returns the specified default value.

📖

How do you create a dictionary with a default value for all new keys?

A:

dictionary.set_default(default_value)

B:

dictionary.default_value = default_value

C:

dictionary.default(default_value)

D:

collections.defaultdict(default_value)

Answer: D

The defaultdict from the collections module is used to create a dictionary with a default value for all new keys.

📖

What is the purpose of the dictionary.items() method?

A:

Returns a list of all keys.

B:

Returns a list of all values.

C:

Returns a list of key-value pairs.

D:

Returns a list of default values.

Answer: C

The items() method returns a list of key-value pairs in the dictionary.

📖

How do you merge two dictionaries?

A:

dict.merge(another_dict)

B:

dict.join(another_dict)

C:

dict + another_dict

D:

dict.update(another_dict)

Answer: D

The update() method is used to merge two dictionaries in Python.

📖

Questions for: Dictionaries