J.P. Morgan Interview Questions
Practice 37 real J.P. Morgan interview questions for 2026. Covers all top categories — Coding & Algorithms, System Design, Software Engineering Fundamentals, Behavioral & Leadership, Machine Learning — across Software Engineer and Data Scientist roles. Real interview questions from actual interviews with detailed solutions to help your interview preparation for J.P. Morgan, with a focus on the coding-heavy screens and system-design conversations that dominate tech interviews at the firm. Expect interviews that weigh implementation speed and correctness, production-quality thinking, and domain-aware design: coding rounds and PR/code-review problems, a system or low-level design discussion, and behavioral leadership questions. For Software Engineers, recurring themes include designing URL shorteners and autocomplete APIs, concurrent/thread-safety reviews, scheduling and collision problems, latency and scalability fixes for shopping-cart or notification systems, and full-stack cloud platform designs like global rental or course-registration systems. For Data Scientists, questions trend toward model fundamentals and stats — overfitting and transformer basics, implementing KNN from scratch, distribution tests, expected-value problems, and even C++ object-lifetime or puzzle-style probablistic questions. Best prep: practice timed coding, rehearse tradeoffs in design, write clear production-ready pseudocode, and refresh statistics and ML fundamentals.
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Two Sum — Indices Summing to a Target
This question evaluates a candidate's ability to design an efficient array-searching algorithm that maps values to indices under a target-sum constrai...
Can All Courses Be Completed?
This question tests graph traversal and cycle detection skills, specifically the ability to model dependency relationships as a directed graph. It eva...
Implement Integer Square Root
Given a non-negative integer x, implement sqrt(x) and return the integer part of its square root, i.e., floor(sqrt(x)). Requirements: - Do not use a b...
Solve tiling, probability, and nested-radical puzzles
This multi-part question evaluates combinatorics and algorithmic skills through 2×N and 3×N domino tiling problems, analysis of an infinite nested squ...
Minimize Operations to Balance Shipments
A shop has n item types, where quantity[i] is the positive integer quantity of the i-th item type. The item types must be shipped in two non-empty con...
Answer common behavioral prompts
Answer common behavioral prompts Behavioral & Leadership Interview — Software Engineer (Onsite) Context: You are interviewing for a Software Engineer ...
Design a URL shortener
This question evaluates a candidate's ability to design scalable web services and systems architecture, covering data modeling, routing, and high-read...
Count substrings and generate TOC
Solve the following two coding problems. 1. Count valid binary substrings Given a string s consisting only of '0' and '1', count how many substrings s...
Compute ring window max and deletion indices
Part A — Ring window maximum: You are given n computers arranged in a circle, represented by an array of bits (1 = on, 0 = off), and an integer k (1 <...
Test whether samples follow a binomial distribution
This question evaluates a candidate's understanding of statistical hypothesis testing, goodness-of-fit assessment for discrete distributions, paramete...
Compute longest palindromic subsequence
Given a string s (1 ≤ |s| ≤ 2000), implement a function that returns the length of the longest subsequence of s that reads the same forward and backwa...
Group anagrams and count string in grid
Part 1 — Group Anagrams: Given an array of strings, group together strings that are anagrams of one another and output both the grouped lists and the ...
Explain Overfitting and Transformer Basics
This question evaluates proficiency in core machine learning competencies such as overfitting and generalization, selection and regularization of loss...
Solve scheduling and collision problems
This question evaluates a candidate's understanding of algorithm design and data structures for resource allocation and dynamic interaction problems, ...
Group strings that are anagrams
This question evaluates skills in string manipulation, grouping by character composition, and the use of hashing or sorting techniques to construct ke...
Design an autocomplete suggestions API
This question evaluates understanding of string-oriented data structures (e.g., prefix trees/tries), ranked retrieval and dynamic updates, testing ski...
Compute max-ons and deletion indices
Question Given a circular array of n computers represented by 0 (off) and 1 (on), determine the maximum possible number of on computers within any con...