ExamAdept

What is the result of the expression len(dictionary)?

A:

Returns the number of keys in the dictionary.

B:

Returns the number of values in the dictionary.

C:

Returns the total number of key-value pairs.

D:

Raises a TypeError.

Answer: A

The len() function returns the number of keys in a dictionary.

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How do you remove a key-value pair from a dictionary?

A:

dictionary.remove_key(key)

B:

dictionary.delete(key)

C:

dictionary.remove(key)

D:

dictionary.pop(key)

Answer: D

The pop() method is used to remove a key-value pair from a dictionary.

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What is the purpose of the dictionary.setdefault(key, default_value) method?

A:

Sets the default value for a key.

B:

Retrieves the default value for a key.

C:

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

D:

Removes a key from the dictionary.

Answer: A

The setdefault() method sets the default value for a key if the key is not present in the dictionary.

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How do you retrieve all keys from a dictionary?

A:

dictionary.keys()

B:

dictionary.get_keys()

C:

dictionary.extract_keys()

D:

dictionary.all_keys()

Answer: A

The keys() method is used to retrieve all keys from a dictionary.

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How do you check if a key is present in a dictionary?

A:

key.exists()

B:

key.in()

C:

key.present()

D:

key in dictionary

Answer: D

The in keyword is used to check if a key is present in a dictionary.

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Questions for: Dictionaries