How do I approach Coding & Algorithms interview questions?

Coding & Algorithms questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master coding & algorithms interviews.

What difficulty level is this interview question?

This is a Medium difficulty Coding & Algorithms question, commonly asked during Technical Screen rounds at Atlassian.

What role is this question designed for?

This question is commonly asked for Data Scientist candidates at Atlassian during technical interviews.

Implement Real-Time Rate Limiting for Web Service Requests

Last updated: Mar 29, 2026

Quick Overview

This question evaluates understanding of real-time rate limiting, time-windowed traffic control, and efficient per-client state management under algorithmic constraints.

Atlassian

Jul 12, 2025, 6:59 PM

Data Scientist

Technical Screen

Coding & Algorithms

Coding Console

Scenario

A web service must throttle traffic from clients; you need to decide in real-time whether each incoming request should be served or rejected according to rate-limiting rules.

Question

Design and implement getRequestStatus(addresses) where addresses[i] is the URL hit at second i. Return "200" or "429" so that no address receives more than 5 requests in any 30-second window or more than 2 in any 5-second window.

Hints

Think sliding windows, per-address queues or deques, and O(

updates.

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