Practice Coding Question | Real Coding Interviews

Quick Summary

Design a stateful query system to filter transaction records by time, amount, user, and currency.
Implement pagination that returns chunks of results ordered by non-descending timestamp.
Support dynamic filter updates and handle the default case where page size is unset.

What This Tests

State management and API design
Conditional array filtering
Sorting and pagination mechanics
Performance trade-offs in data retrieval

Common Patterns

Sorting

Design a system to filter and paginate a list of transaction records. Each record follows a list of string format: [timestamp, id, userId, currency, amount]. The system should allow applying query filters for the following criteria:

Time range filter
Amount range filter
User ID filter
Currency filter

Test Cases

Input

Output

Expected