Collections and Multithreading | Dataford Interview Questions

Explain how synchronized collections work and how you would use them to handle multithreading and database-related concerns. Implement a function that applies batches of collection operations from separate threads while guaranteeing that each batch is atomic and batches commit in input order. The function receives batches, a list of operation lists, where each operation is ["add" or "remove", value]; it returns the final collection as a sorted list. Values are strings, and invalid operations are not provided.

Constraints

0 <= batches.length <= 100
0 <= batches[i].length <= 100
Each operation has exactly two elements
Each operation is either ["add", value] or ["remove", value]
value is a non-empty string with at most 100 characters
The output must reflect batches in input order

Function Signature

def synchronized_collection(batches):

Your question is Collections and Multithreading. 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

Constraints

0 <= batches.length <= 100
0 <= batches[i].length <= 100
Each operation has exactly two elements
Each operation is either ["add", value] or ["remove", value]
value is a non-empty string with at most 100 characters
The output must reflect batches in input order

Function Signature

def synchronized_collection(batches):

Your question is Collections and Multithreading. 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.