Key-Value Store With Tests | Dataford Interview Questions

Describe how you would implement a key-value store with functional test cases and careful handling of edge cases.

Implement key_value_store(operations), where each operation is an array: ["set", key, value], ["get", key], or ["delete", key]. Return one result per operation: True for a successful set, the stored value or None for get, and True or False for delete depending on whether the key existed. Keys are non-empty strings, values are non-null JSON-compatible values, and operations are valid.

Constraints

0 <= operations.length <= 10^5
Each operation is a valid set, get, or delete operation
Keys are non-empty strings
Set values are non-null JSON-compatible values
A get or delete operation may reference a missing key

Function Signature

def key_value_store(operations):

Your question is Key-Value Store With Tests. 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.

Problem

Describe how you would implement a key-value store with functional test cases and careful handling of edge cases.

Constraints

0 <= operations.length <= 10^5
Each operation is a valid set, get, or delete operation
Keys are non-empty strings
Set values are non-null JSON-compatible values
A get or delete operation may reference a missing key

Function Signature

def key_value_store(operations):

Your question is Key-Value Store With Tests. 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.