In-Memory Key-Value Store | Dataford Interview Questions

Create an in-memory database for key-value storage and basic operations.

Implement SET, GET, and DELETE commands using a single function. The input is a list of command arrays: ['SET', key, value], ['GET', key], or ['DELETE', key]. Return the results of GET and DELETE commands in order. GET returns the stored string or None; DELETE returns True if the key existed and was removed, otherwise False. SET produces no result.

Constraints

1 <= operations.length <= 1000
Each operation is a valid SET, GET, or DELETE command
Keys and values are non-empty strings
A SET command contains exactly three elements
A GET or DELETE command contains exactly two elements

Function Signature

def process_operations(operations):

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Problem

Create an in-memory database for key-value storage and basic operations.

Constraints

1 <= operations.length <= 1000
Each operation is a valid SET, GET, or DELETE command
Keys and values are non-empty strings
A SET command contains exactly three elements
A GET or DELETE command contains exactly two elements

Function Signature

def process_operations(operations):

Your question is In-Memory Key-Value Store. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.