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Anthropic CodeSignal OA guide cover
Anthropic CodeSignal

I Passed the Anthropic CodeSignal OA in 2026: Real Questions and Prep Plan

I took the Anthropic CodeSignal 2026 test: one progressive problem, 90 minutes, Python only. Here's exactly how I passed and the promote() trap to avoid.

17 min read 24 Jul 2026
NVIDIA HackerRank OA guide cover
NVIDIA HackerRank

I Took the NVIDIA Ignite OA on HackerRank in 2026: Real Questions and Prep Plan

I took the NVIDIA Ignite HackerRank OA for a 2026 SWE new-grad role: 3 coding problems in ~90 min (bit manipulation + greedy heap), webcam proctored.

16 min read 23 Jul 2026
Hudson River Trading CodeSignal OA 2026 guide cover: 4 coding questions in 70 minutes, scored 200 to 600.
Hudson River Trading CodeSignal

How I Passed the Hudson River Trading OA on CodeSignal in 2026: Real Questions and Prep Plan

I took the hudson river trading oa on CodeSignal in 2026: 4 questions in 70 minutes, a Q3 timeout trap, and the 200-600 score you need to pass.

15 min read 23 Jul 2026
Citadel HackerRank OA 2026 guide cover: 2 coding questions with 12 hidden tests, scored over about 75 minutes.
Citadel HackerRank

I Took the Citadel HackerRank OA in 2026: Real Questions and Prep Plan

I took the Citadel HackerRank OA for a 2026 SWE new-grad role: 2 coding problems in ~75 min, ~12 hidden tests each, near-perfect needed to advance.

14 min read 23 Jul 2026
Coinbase CodeSignal OA 2026 guide cover: 4 questions plus a cognitive block, scored 200 to 600 over 80 to 90 minutes.
Coinbase CodeSignal

I Passed the Coinbase CodeSignal OA 2026: A Personal Guide

I cleared the Coinbase CodeSignal OA in 2026. This personal guide shares the real questions I got, my 7-day prep plan, and the traps that trip up most candidates.

16 min read 22 Jul 2026
Susquehanna International Group CodeSignal OA Guide 2026 — 4 Questions, 70 Minutes, 200 to 600 Score
Susquehanna International Group CodeSignal

I Passed SIG's CodeSignal OA in 2026: Questions, Prep, What to Avoid

I passed SIG's CodeSignal OA in 2026: 4 questions in 70 minutes, the Q4 runtime-limit trap, and what to avoid.

14 min read 21 Jul 2026
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