To retrieve a value from a map, you call the __________ member function and pass the __________ that is associated with the desired value.
A) at(), key
B) at(), value
C) key(), key
D) pair(), key
E) None of these

Question

Quizplus · Accepted Answer

The at() member function is used to retrieve a value from a map by providing its associated key. The key is passed as an argument to the at() function, which returns the corresponding value. Option B is incorrect as it suggests passing the value, which would not be an efficient way of retrieving a value from a map. Option C is also incorrect, as the key() member function returns the key associated with a specific value in the map, which is not what is being asked for in the question. Option D is incorrect as the pair() member function is used to create a new pair in the map, not to retrieve a value from an existing one.

To Retrieve a Value from a Map, You Call the __________