Company: Crossover_2_Feb
Difficulty: medium
In-Memory Database Description Your task is to implement a simplified version of an in-memory database. The database contains records, where each record can be accessed with a unique identifier key of string type. A record may contain several field - value pairs, both of which are also of string type. You will receive a list of queries to the system, and the final output should be an array of strings representing the returned values of all queries. Each query will call one of the operations described below. Level 1: Basic Operations SET <key> <field> <value> — should insert a field - value pair to the record associated with key . If the field in the record already exists, replace the existing value with the specified value . If the record does not exist, create a new one. This operation should return an empty string. GET <key> <field> — should return the value contained within field of the record associated with key . If the record or the field doesn't exi