Service Availability Check Script | Dataford Interview Questions

Razorpay infrastructure may expose multiple server IPs for a service. Given deterministic probe results for each IP, classify servers as available when at least one allowed attempt succeeds within the latency threshold.

A probe succeeds when its HTTP status is between 200 and 399, inclusive, and its latency is at most timeout_ms. For each server, inspect at most max_retries + 1 probes in order. Stop checking that server after its first successful probe.

Formal Specification

Implement check_service_availability(servers, timeout_ms, max_retries). servers is a list of dictionaries containing a unique string ip and a probes list. Each probe is a dictionary with integer fields status and latency_ms. Return a dictionary with two lists, available and unavailable, preserving the original server order within each list.

Constraints

1 <= len(servers) <= 10^5
0 <= max_retries <= 10
0 <= timeout_ms <= 10^6
Each server has at least one probe and at most max_retries + 1 probes
IP addresses are unique

Function Signature

def check_service_availability(servers, timeout_ms, max_retries):

Your question is Service Availability Check Script. 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

Formal Specification

Constraints

1 <= len(servers) <= 10^5
0 <= max_retries <= 10
0 <= timeout_ms <= 10^6
Each server has at least one probe and at most max_retries + 1 probes
IP addresses are unique

Function Signature

def check_service_availability(servers, timeout_ms, max_retries):

Your question is Service Availability Check Script. 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.