ExamAdept

What does the dictionary.pop(key, default_value) method do?

A:

Removes the key from the dictionary.

B:

Returns the value for the key and removes it.

C:

Returns the value for the key or the default value if the key is not present.

D:

Adds a new key-value pair with the specified default value.

Answer: C

The pop() method returns the value for the key or the default value if the key is not present and removes the key from the dictionary.

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How do you check if a key exists in a dictionary without raising an error?

A:

key.exists()

B:

key in dictionary

C:

dictionary.has_key(key)

D:

dictionary.key_exists(key)

Answer: B

The in keyword is used to check if a key exists in a dictionary without raising an error.

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How do you merge two dictionaries and create a new one?

A:

dict.merge(another_dict)

B:

dict.join(another_dict)

C:

{**dict, **another_dict}

D:

dict.combine(another_dict)

Answer: C

Using the syntax {**dict, **another_dict} allows you to merge two dictionaries and create a new one.

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

A:

Reverses the order of keys in the dictionary.

B:

Reverses the order of values in the dictionary.

C:

Reverses the key-value pairs in the dictionary.

D:

There is no reverse() method for dictionaries.

Answer: D

Unlike lists, dictionaries do not have a reverse() method.

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What does the dictionary.fromkeys(keys, default_value) method do?

A:

Creates a new dictionary with specified keys and values.

B:

Creates a new dictionary with specified keys and default values.

C:

Updates an existing dictionary with new keys and values.

D:

Removes specified keys from a dictionary.

Answer: B

The fromkeys() method creates a new dictionary with specified keys and default values.

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Questions for: Dictionaries