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 an in-memory SQL-like table
Implement a simplified in-memory SQL-like database for a single table. You should support the following operations on a table with a fixed schema (a l...
Advance Cyclic Ball Flips Efficiently
Determine ball colors after many synchronized marker moves around a circle, where marked positions flip before advancing. Derive an O(n + m) parity so...
Calculate Driver Payments
This question evaluates a candidate's ability to implement interval arithmetic and overlap computation, perform data deduplication and filtering, hand...
Assign Tasks to the Minimum Number of Workers
Assign Tasks to the Minimum Number of Workers Problem Implement assignMinimumWorkers(tasks) -> workerIds. Each task is [startMinute, durationMinutes]....
Find the Minimum Processing Rate to Meet a Deadline
Find the smallest integer processing rate that completes independent workloads before a deadline when unused hourly capacity cannot be shared. The pro...
Return Binary Search Tree Values in Ascending Order
Return Serialized BST Values in Ascending Order Implement ascendingBstValues(levelOrder) -> values. levelOrder is a JSON-compatible array containing s...
Design a restaurant waitlist system
You are implementing the waitlist system for a restaurant. Parties arrive over time, can cancel, and get seated when a table becomes available. Rules ...
Count Complete Highway Journeys from Toll Logs
Count Complete Highway Journeys from Toll Logs Each toll record is (timestamp, plate, location, booth_type). booth_type is ENTRY, MAINROAD, or EXIT. T...
Find Unreachable Objects in a Heap Graph
Find Unreachable Objects in a Heap Graph Heap objects now contain references to other addresses. Each object is represented as [address, references], ...
Design a balloon stability tracker
Implement a class BalloonFestival to manage hot-air balloons and wind fields over time, and to report rewarded balloons at inspection times. Methods a...
Time-Based Key-Value Store
This question evaluates the ability to design a data structure that supports versioned storage and efficient point-in-time lookups. It tests binary se...
Remove Duplicate Letters Lexicographically
Remove Duplicate Letters Lexicographically Given a lowercase string, remove repeated occurrences so that every distinct letter appears exactly once. T...
Solve three easy algorithm problems
You are given three independent algorithmic tasks. For each one, explain your approach (no need to run code). 1) Merge two sorted lists (integers inst...
Solve Grid Path and Unique Substring
This question evaluates algorithmic problem solving skills in grid traversal and stateful string processing, specifically testing understanding of pat...
Design Composable Event Recommendations
This question evaluates a candidate's ability to design composable, extensible recommendation logic and ranking for a ticket marketplace, emphasizing ...
Largest Subset With Positive Bitwise AND
Problem Implement largest_positive_and_subset(nums). Choose a nonempty subset of the given nonnegative integers. The subset is valid when the bitwise ...
Compute the Minimum Number of Meeting Rooms
Compute the Minimum Number of Meeting Rooms Problem Implement minimumMeetingRooms(intervals) -> rooms. Each interval is a two-element integer array [s...
Solve four algorithmic coding tasks
You are given four independent coding tasks. They may be solved in any order, and partial test-case credit is awarded for each task. The tasks are rou...
Find a Path Between Nodes in a Fibonacci Tree
Practice a Databricks coding interview problem focused on find a path between nodes in a fibonacci tree. The prompt emphasizes edge cases, clean imple...
Solve String Arrays and Row Deduplication
This multi-part question evaluates array and string manipulation skills, deduplication logic and pairwise character comparison, as well as the ability...