PracHub
Practice the exact questions companies are asking right now.
PracHub launched on June 19, 2026 with 2 votes.
What it does
Master your tech interviews with 8,500+ questions from top companies, validated by real candidates. Practice coding, SQL, machine learning, and system design.
10,000+ candidate-reported interview questions from 450+ companies, with clear solutions, trade-offs, and follow-ups.
Every one of the 10,626 questions here came from someone who just sat the interview you're about to take, and comes with a solution that shows what the interviewer was really testing. Implement an LRU memoization helper with crash persistence, matching Python's functools.lru_cache behavior. Design a guest-randomized A/B test for a checkout nudge, including what to do when randomization breaks down. What is the KV cache in LLM inference? Cover what gets cached, prefill vs. decode, and the asymptotics it changes. Return the top-K points by frequency with distance tie-breaks, then optimize repeated queries at scale. You work on a Facebook Marketplace-style C2C app. Evaluate a feature that…from prachub.com
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