Onsite Interview Questions
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Pinterest ML System Design: Real-Time Personalized Feed
Design a Pinterest-style real-time feed ranking system using embeddings, low-latency serving, and streaming events. Learn architecture choices and next steps.
Pinterest System Design: Scalable Catalog Update System
Practice designing a scalable Pinterest merchant product-catalog update system: real-time APIs, bulk ingestion (500k items), validation, job queues, conflict resolution. Start now.
Rate Limiter Dropped Requests (Coding) - Snowflake
Simulate a rate limiter: given arrival timestamps, return dropped-request timestamps under per-second (≤3) and per-10-second (≤20) limits. Read hints, optimize.
Roblox Backend System Design: Like/Unlike (1M QPS Scale)
Design a scalable Roblox like/unlike system handling 1M QPS with low latency, strong consistency, and high availability. Read architecture choices & tips.
Roblox Coding Interview: Design Autocomplete System (Trie)
Build an incremental autocomplete using Trie + heap: return top-3 prefix matches and update counts on '#'. Includes code notes & interview tips.
Roblox ML Interview: Feature Engineering & Encoding
Prepare for Roblox ML interviews with feature engineering questions on high-cardinality encoding, target encoding, and preprocessing. Read actionable tips.
Roblox ML System Design: Real-time Game Recommendations
Build a low-latency Roblox recommender that matches users to games using lifetime average playtime. Learn streaming aggregation, candidate generation and ranking.
Salesforce Behavioral Interview: Motivation & Fit Tips
Prepare for Salesforce behavioral interviews: explain your motivation, align past impact with company values, and give metric-backed fit answers. Practice now.
Salesforce Cloud Computing Interview: Infrastructure
Prepare for a Salesforce cloud computing question: compare virtualization vs containerization, AWS vs GCP, pick EC2/Lambda/EKS, and implement EKS sidecars.
Salesforce Coding: Left-Right Occurrence Binary Strings
Salesforce coding: build left/right occurrence binary strings for an integer array. Learn hash-table two-pass solutions, time/space tradeoffs and follow-up ideas.
Salesforce System Design: Scalable URL Shortening Service
Design a scalable, low-latency URL shortening service for Salesforce interviews. Learn API design, storage, caching, idempotency and trade-offs. Prepare now.
Scaled Self-Attention Implementation — Meta
Implement scaled self-attention for Transformers: compute attention outputs and per-query weights from Q, K, V with masking and numerical-stability. Try coding
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