Treine com perguntas que já apareceram em entrevistas reais

+15

Tell me about a time you had a conflict with a coworker. How did you resolve it?

+14

What project are you most proud of?

+10

Design a Job Scheduler

Design a distributed job scheduler that can handle high-throughput job processing (10,000+ jobs per second), support both scheduled (cron-based) and ad-hoc job execution, include retry mechanisms for failed jobs, and maintain execution history for up to one year.

+9

Describe your most impactful project

+8

Design a Chat/Messaging System

Design a real-time messaging system like WhatsApp or Facebook Messenger that supports 1:1 and group conversations, message delivery status tracking, user presence features, conversation history, and can scale to handle millions of users.

+7

Tell me about a project where the requirements were not clear or kept changing. How did you adapt and maintain productivity?

+7

Give me an example of a tough or critical piece of feedback you received.

+6

Tell me about a conflict you had at work.

The interviewer focused on a conflict that comes from different perspectives or ideas on how to execute a certain task.

+6

Design a Top-K System

Design a system that efficiently retrieves top-k items (songs, videos, hashtags, etc.) based on user activity or engagement metrics within specified time windows. The system should handle real-time data aggregation and support queries like "top 10 songs in the last 7 days" or "trending hashtags in the past 24 hours."

+5

Describe experience working on a complex project

+5

Design a Social Media Feed Generation System

Design a social media feed system that generates and populates personalized feeds for users on platforms like Twitter, Instagram, or Facebook.

+5

Design a Hotel Booking System

Design a hotel booking system that allows users to search for hotels, make reservations, and manage bookings. Focus on data modeling and SQL queries for handling room availability, pricing, and reservation management.

+5

Design a Metrics Aggregator

Design a metrics aggregation system that collects count-based metrics (like user signups, system errors, ad clicks) from services via a client library and displays them as histogram data on a dashboard. The system should support querying aggregated metrics within specific time frames for monitoring and analytics purposes.

+5

Design a URL Shortener

Design a URL shortening service similar to TinyURL that allows users to convert long URLs into short, shareable links and manage their shortened URLs.

+5

Design a Rate Limiter

Design a rate limiting system that can control and throttle API requests to prevent system overload and ensure fair resource allocation. The system should be able to handle distributed scenarios, track requests across multiple servers, and enforce limits per user/client or between internal services to prevent abuse and maintain system performance.

+5

Leetcode 146. LRU Cache

Implement an LRUCache that supports O(1) average-time get(key) returning the value or -1 and put(key, value) which inserts or updates a key and, if capacity is exceeded, evicts the least-recently-used key. The core challenge is maintaining key-value storage together with recency ordering to enable constant-time access, updates, and eviction.

+4

What was a situation where you didn't agree with your manager or superior's decision?

+4

Give an example of a situation where you had to overcome a significant setback or obstacle to achieve a goal

+4

Describe a time you failed and how you managed the situation

+4

Design a Notification System

Design a scalable notification system that supports both individual and bulk notifications to multiple users. The system should handle different types of notifications including critical time-sensitive messages (like 1:1 chat) and promotional content (like system-generated recommendations) with appropriate delivery mechanisms. Consider scalability requirements (up to 1M notifications/second), expiration logic for different notification types, and the typical 80/20 distribution between critical and promotional notifications where promotional messages can target thousands of users simultaneously.

+4

Design Instagram

Design a photo-sharing social media platform where users can upload photos, follow other users, and view a chronological feed of posts from people they follow.

+3

Tell me about a time where you mentored a colleague

+3

Leetcode 253. Meeting Rooms II

Given a list of meeting time intervals, determine the minimum number of conference rooms required so that no meetings overlap. The core challenge is computing the maximum number of concurrent intervals (e.g., via sorting with a min-heap of end times or a sweep-line of start/end events).

+3

Design DropBox

Design a file storage and synchronization system like Dropbox that allows users to upload, download, and sync files across multiple devices with real-time updates.