# Problem Library

> Every practice problem once, filters, plans by role and AI search.

## What it holds

The Library lists every practice problem once, in one type and one topic: Coding , SQL & data , Shell & DevOps , Build & debug , Quizzes and System design . A problem that appears in several places is listed once and opens in the best of them.

## Finding a problem

Filter by type, topic, difficulty, list (Top 100, Most asked) and how you want to practise; each filter shows how many problems it leaves. Ask AI takes a sentence, such as “medium graph problems asked at Google”, and sets the filters for you.

## Where a problem opens

Code & test : graded tests in SolveMe . Hands-on lab : a real machine in Labs . Walkthrough : the statement and its worked solutions. Solve with AI : CodeMe writes and explains a solution. Quiz : a multiple-choice session.

## Plans and progress

Training plans by role (software engineer, data, DevOps and SRE, ML and AI) and practice by interview round. Problems you solve in SolveMe are marked solved here.

Source: https://docs.cariara.com/library