Design a News Feed Ranking System
Design a system to rank news feed items based on relevance, user preferences, and other factors.
Revise fundamentos, debugging e tomada de decisão técnica.
Encontre perguntas técnicas reais para revisar fundamentos, debugging, trade-offs e profundidade prática em entrevistas.
Revise fundamentos, debugging e decisões técnicas.
Se quiser, refine esse recorte com um termo específico sem sair da trilha atual.
Esse recorte reúne perguntas públicas desse tipo para acelerar sua preparação com mais contexto e menos ruído.
Design a system to rank news feed items based on relevance, user preferences, and other factors.
Revise fundamentos, debugging e tomada de decisão técnica.
Design a parking lot management system using the coding language of your choice. The code is expected to be syntactically correct, although it will not be executed.
Revise fundamentos, debugging e tomada de decisão técnica.
Design the low-level design (LLD) of a system like Splitwise, which allows users to track shared expenses and settle debts. The system should support features like adding expenses, splitting costs among users, and tracking balances.
Revise fundamentos, debugging e tomada de decisão técnica.
Design an app that allows users to browse restaurant menus, place food orders, and track delivery status in real-time.
Revise fundamentos, debugging e tomada de decisão técnica.
Design the game Connect Four, focusing on the win logic. The system should determine when a player has won by connecting four of their pieces in a row, either horizontally, vertically, or diagonally.
Revise fundamentos, debugging e tomada de decisão técnica.
Design a chess game system that allows players to make moves, validates legal moves according to chess rules, and tracks game state including check, checkmate, and stalemate conditions.
Revise fundamentos, debugging e tomada de decisão técnica.
Design a meeting scheduling system that allows users to create meetings, invite participants, check availability, and manage calendar conflicts.
Revise fundamentos, debugging e tomada de decisão técnica.
Design a food delivery platform that allows users to browse restaurants, place orders, and track deliveries in real-time, while enabling restaurants to manage their listings and orders.
Revise fundamentos, debugging e tomada de decisão técnica.
Walk me through a significant technical project you've worked on in the past. Explain the technical challenges you faced, your approach to solving them, and what you learned from the experience.
Revise fundamentos, debugging e tomada de decisão técnica.
Design an in-memory key-value store that supports multiple data structures (sorted sets, lists, etc.) and can be configured with different eviction strategies like LRU, LFU, or TTL-based expiration.
Revise fundamentos, debugging e tomada de decisão técnica.
Onsite interview for SWE2/backend around 2023 included a dedicated debugging round. Exact prompt was not recalled; useful prep focus: reading unfamiliar code, isolating the bug, testing hypotheses, adding or using tests, and explaining the fix clearly.
Revise fundamentos, debugging e tomada de decisão técnica.
Entrevista tecnica sobre validacao com IA/agentes. A pergunta avaliava definicao de regras, testes com casos validos e invalidos, datasets de avaliacao, validacao deterministica quando possivel, monitoramento, tratamento de edge cases e metricas de qualidade.
Revise fundamentos, debugging e tomada de decisão técnica.
Entrevista tecnica para vaga envolvendo busca e recuperacao de informacao. A pergunta avaliava entendimento de busca lexical por BM25, busca semantica por embeddings, tradeoffs, casos de uso e estrategias hibridas.
Revise fundamentos, debugging e tomada de decisão técnica.
Entrevista tecnica sobre agentes e dados sensiveis. A pergunta avaliava autorizacao por role, enforcement no backend e no banco, isolamento de contexto, controle de escopo, auditoria, redacao de dados e defesa contra prompt injection/exfiltracao.
Revise fundamentos, debugging e tomada de decisão técnica.
Entrevista tecnica sobre agentes com acesso a banco de dados. A pergunta avaliava desenho de guardrails para queries, separando cenarios read-only e com escrita, permissoes minimas, allowlists, validacao, sandboxing, revisao humana e limites transacionais.
Revise fundamentos, debugging e tomada de decisão técnica.
Entrevista tecnica para vaga envolvendo IA/RAG e agentes. A pergunta avaliava monitoramento, rollout gradual, deteccao antecipada de alucinacoes, guardrails, observabilidade, avaliacao automatizada e resposta a incidentes em producao.
Revise fundamentos, debugging e tomada de decisão técnica.
Entrevista tecnica para vaga envolvendo IA/RAG e agentes. A pergunta avaliava criterios de qualidade para respostas de um sistema RAG, incluindo relevancia, groundedness, completude, metricas offline/online e feedback de usuarios.
Revise fundamentos, debugging e tomada de decisão técnica.
Follow-up de entrevista conduzida por IA; testes automatizados de acessibilidade e ferramentas utilizadas.
Revise fundamentos, debugging e tomada de decisão técnica.
Senior backend technical round. Asked about microservices trade-offs, including distributed-system complexity, deployment coordination, observability, service boundaries, data consistency, versioning contracts, and operational overhead.
Senior backend technical round. Asked about CI/CD experience and Kubernetes basics, including the difference between a container and a pod, deployment pipelines, and how cloud-native services are packaged and deployed.
Senior Python/backend technical round. Asked about mocks in unit tests, replacing dependencies such as databases, HTTP clients, queues, or external services, and verifying behavior without real external systems.
Senior backend technical round. Asked for a real query optimization example, including EXPLAIN/query plans, reducing rows before joins, moving filters earlier, indexing or query restructuring, and latency improvement.
Senior backend technical round. Asked about SQL joins, especially inner join, left join, right join and full outer join, including returned rows and NULLs for missing matches.
Senior backend technical round. Asked for a definition of transactions and ACID properties: atomicity, consistency, isolation and durability, including why they matter for reliable database updates.
Senior Python/backend technical round. Asked about CORS, browser enforcement, Access-Control-Allow-Origin headers, preflight OPTIONS requests, and why server-to-server or CLI calls are not restricted the same way.
Senior backend technical round. Asked about practical authentication with Keycloak, OAuth/JWT, bearer tokens, token validation, route authorization, roles/scopes, and API request validation.
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