Palantir
Big data analytics company for defense, intelligence, and enterprise.
5 Rounds
~28 Days
Very Hard
The Interview Loop
Recruiter Screen (30 min)
Standard fit check, behavioral questions, and resume overview.
Technical Loop (3-4 Rounds)
Deep dive into domain knowledge, coding, and system design.
Interview Question Bank
Full Stack Engineer
•
Coding
•
medium
Given a list of server logs containing timestamps, IP addresses, and login status (SUCCESS/FAILURE), write a function to find all IP addresses that had more than N failed login attempts within a rolling 5-minute window.
#Sliding Window
#Hash Map
#Log Parsing
Full Stack Engineer
•
Coding
•
medium
Palantir Apollo manages software deployments. Given a list of microservices and their dependencies, write an algorithm to determine a valid deployment order. If a circular dependency exists, return an error.
#Graphs
#Topological Sort
#DFS/BFS
Full Stack Engineer
•
Coding
•
medium
Given a 2D grid representing a map in Palantir Gotham where 0 is an open path, 1 is an obstacle, and 2 is a high-risk zone, find the shortest path from start to destination avoiding obstacles and minimizing travel through high-risk zones.
#Graphs
#Dijkstra's Algorithm
#BFS
Full Stack Engineer
•
Coding
•
medium
Write a function to merge overlapping intervals. You are given a massive stream of telemetry data where each entry has a start and end timestamp. Output the consolidated periods of continuous activity.
#Sorting
#Arrays
#Intervals
Full Stack Engineer
•
Coding
•
medium
Design a Rate Limiter for a public-facing Palantir API. Implement the logic to allow a maximum of X requests per Y seconds per customer ID.
#Token Bucket
#Concurrency
#Hash Map
Full Stack Engineer
•
Coding
•
medium
Given a directed graph representing an ontology mapping in Palantir Foundry, write a function to detect if there is a cycle in the graph.
#Graphs
#DFS
#Cycle Detection
Full Stack Engineer
•
Coding
•
hard
Implement a text justification algorithm. Given an array of words and a width maxWidth, format the text such that each line has exactly maxWidth characters and is fully (left and right) justified.
#Strings
#Simulation
#Greedy
Full Stack Engineer
•
Coding
•
hard
Write a basic regular expression parser that supports '.' (matches any single character) and '*' (matches zero or more of the preceding element).
#Dynamic Programming
#Recursion
#Strings
Full Stack Engineer
•
Coding
•
easy
Given an array of integers representing daily financial transactions, find the contiguous subarray with the maximum sum. This is used to identify periods of highest financial anomaly.
#Arrays
#Dynamic Programming
#Kadane's Algorithm
Full Stack Engineer
•
Coding
•
medium
Implement a function to play the game of Battleship. Given a board with ships, write a function that takes a coordinate and returns 'Hit', 'Miss', or 'Sunk'.
#Matrix
#Simulation
#Object-Oriented Design
Difficulty Radar
Based on recent AI-sourced data.
Meet Your Interviewers
The "Standard" Interviewer
Senior EngineerFocuses on core competencies, system constraints, and clear communication.
SimulateUnwritten Rules
Think Out Loud
Always explain your thought process before writing code or drawing architecture.