coding
Hard
Verified
OA[CodeSignal] Cloud File Storage System
Category: Graph coding problem# Question Your task is to implement a simple in-memory cloud storage system that maps objects (files) to their metadata (name, size, etc.). You...Input: Graph (nodes and edges)
Output: Array
coding
Hard
Verified
OA[CodeSignal] Design Banking System
Category: Graph coding problem# Question Design a banking system that supports account management, transactions, and various financial operations.Input: Graph (nodes and edges)
Output: Computed result
coding
Medium
Verified
Convert Stack Samples To A Trace
Category: Interval-based coding problem# Description Sampling profilers capture the call stack at periodic intervals to analyze program performance. However, most trace visualization tools...Input: List
Output: Computed result
coding
Medium
Verified
Find Duplicate Files
Category: String coding problem# Description Given a list of file paths in a directory system, find all duplicate files. Two files are considered duplicates if they have identical...Input: List
Output: Array
coding
Hard
Verified
Multi Threaded Web Crawler
Category: Graph coding problem# Description Given a URL
startUrl and an interface HtmlParser, implement a concurrent web crawler to discover all unique URLs that share the...Input: Graph (nodes and edges)Output: Array
coding
Hard
Verified
OA[CodeSignal] In-Memory Database
Category: Graph coding problem# Description Implement a simplified in-memory database that supports record manipulation with various operations. The system should handle basic...Input: Graph (nodes and edges)
Output: Array
system design
Hard
Verified
System Design - Inference API
Category: Queue-based system design problemYou need to design a high-concurrency inference API system. This system must handle many requests happening at the same time. You are given an API...Input: Number(s)
Output: Computed result
coding
Medium
Verified
Service Log Aggregator
Category: Trie-based coding problemA distributed system emits log entries from multiple services and worker threads. Each log entry is a colon-separated string in the format...Input: Array
Output: Computed result
coding
Hard
Verified
Distributed Statistics Engine
Category: String coding problemA large dataset of integers is distributed across
k workers (indexed 0 to k-1). Each worker holds an unsorted, roughly equal slice of the data....Input: StringOutput: Printed output
coding
Medium
Verified
Longest Match Tokenizer
Category: Array coding problemYou are given a text string
text and a dictionary array where each element is in the format "<key>:<id>". Here key is a token string and id...Input: ArrayOutput: Computed result
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