Software Engineer Coding & Algorithms Interview Questions
Practice 2,712 real Coding & Algorithms interview questions for Software Engineer roles. From companies including Meta, Amazon, Google, Uber, Microsoft.
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"
"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Implement cache and gift assignment system
You are given two independent programming problems. --- Problem 1: Implement a bounded key–value cache Design a data structure that stores key–value p...
Most Frequent Call Stack from Profiler Samples
This question evaluates a candidate's ability to design an efficient hashing and frequency-counting solution over sequences, along with careful handli...
Validate a Shopping Cart
This question evaluates the ability to implement robust input and business-rule validation for shopping-cart items, including data integrity checks, i...
Aggregate Loans by Ultimate Parent Company
Aggregate Loans by Ultimate Parent Company Each company has at most one direct parent. For every company loan, follow the parent chain to its ultimate...
Implement consistent hashing ring
Implement consistent hashing ring Implement consistent hashing for routing keys to servers. Provide APIs addNode(nodeId, weight), removeNode(nodeId), ...
Implement an asyncio-based chat server
Async Chat Server (Python asyncio) Build a TCP chat server using Python's asyncio. The server listens on a given port and serves many concurrent clien...
Explain OS processes, threads, and memory
Explain OS processes, threads, and memory Explain core operating system concepts: processes vs threads, context switching, and scheduling (preemptive ...
Detect Fraud by Propagating Suspicious PII
Detect Fraud by Propagating Suspicious PII Process a stream of underwriting and fraud_flag events in order. Maintain a set of suspicious PII values dr...
Debug and Explain Fixes
Given a small codebase with failing unit tests, identify the root causes of the failures, fix the bugs, and explain the defects you found. Add minimal...
Track Customer Revenue and Referral Revenue
Track Customer Revenue and Referral Revenue Problem Implement a top-level function that processes an in-memory customer revenue tracker through a lite...
Analyze time complexity for dictionary operations
Analyze the time complexity of the following dictionary/hash map operations. (a) Searching for a key: state average-case and worst-case time, and expl...
Solve four classic algorithm problems
You are given four independent coding tasks. For each task, implement the required function. --- Problem 1: Zigzag level-order traversal of a binary t...
Implement Timeout Refund Workflow
This question evaluates skills in deterministic workflow design, idempotency and retry-safety for external payment integrations, state-transition corr...
Merge Overlapping Collinear Segments
You are given a list of 2D geometric segments: vector<vector<pair<double, double>>> segments Each inner list represents one segment and contains at le...
Generate Account Email Notifications
You are building an email notification scheduler for user accounts. You are given: 1. A list of user accounts. Each account has: - account_id - ...
Count segments and optimize 3-server assignment
There are two independent programming tasks. --- Problem 1: Transaction Segments You are given: - An integer n, the length of an array. - An integer k...
Content Safety Filter
This coding question tests string parsing, tokenization logic, and pattern-matching algorithm design in a practical content moderation context. It eva...
Generate all strings by expanding wildcards
Problem Given a string s consisting only of characters '0', '1', and '', replace every '' with either '0' or '1' and return all possible resulting bin...
Find the Minimum Number of Meeting Rooms
Find the Minimum Number of Meeting Rooms You are given meeting intervals [start, end], where start < end. A room can host at most one meeting at a tim...
LRU Cache
This question evaluates a candidate's ability to design a data structure combining a hash map with a doubly linked list to achieve constant-time acces...