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."
Compute the Minimum Number of Meeting Rooms
Compute the Minimum Number of Meeting Rooms Problem Implement minimumMeetingRooms(intervals) -> roomCount. Each meeting is a half-open interval [start...
Find the Lowest Common Ancestor in a Binary Tree
Find the Lowest Common Ancestor in a Binary Tree Problem Implement lowestCommonAncestor(left, right, root, first, second) -> nodeId. The binary tree h...
Validate a Balanced INDENT and DEDENT Token Stream
Validate a Balanced INDENT and DEDENT Token Stream Problem A tokenizer has already converted a document into a sequence of tokens. Two token values ha...
Count Completed Jobs in a Serial Multi-Worker Pipeline
Count Completed Jobs in a Serial Multi-Worker Pipeline An automation pipeline contains stages that execute in order. Each stage is represented as [num...
Count Pairs of Strings with Disjoint Character Sets
Count Pairs of Strings with Disjoint Character Sets Problem Implement countDisjointStringPairs(words) -> count. Count unordered index pairs (i, j) wit...
Resolve Package Dependencies with Cycle Detection
Implement buildOrder(dependencies, target), which returns the packages needed to build and install target in a valid dependency-first order. dependenc...
Sort Every Concentric Matrix Border Clockwise
Sort Every Concentric Matrix Border Clockwise Given a nonempty rectangular integer matrix, process each concentric layer independently. For a layer, l...
Maximize Fixed Positions After Deletions
Given an integer array a, delete zero or more elements while preserving the relative order of the elements that remain. Let the resulting array be b, ...
Detect a K-in-a-Row Win on a Rectangular Board
Detect a K-in-a-Row Win on a Rectangular Board Implement winning_move(board, row, col, k) after a valid move has placed a player's nonzero integer tok...
Count Perfect Digit-Frequency Substrings
Count Perfect Digit-Frequency Substrings Problem Implement countPerfectSubstrings(s, k). The string s contains only decimal digits. A nonempty substri...
Find the Longest Substring Without Repeated Characters
Find the Longest Substring Without Repeated Characters Problem Implement longestUniqueSubstringLength(text) -> length. Return the length of the longes...
Traverse All Reachable Pages With Parallel BFS
Problem A collection of web pages is modeled as a directed graph. graph[page] lists the pages linked from page in a stable order. Implement reachable_...
Implement a Followable Microblog Timeline
Implement a Followable Microblog Timeline Design an in-memory microblog service with these operations: `text post(user_id, tweet_id) follow(follower_i...
Delete One Character Type to Minimize Unique Segments
Problem Implement min_unique_segments_after_deletion(s) for a nonempty lowercase English string. Choose exactly one character value that appears in s ...
Track Missing Package IDs from Out-of-Order Receipts
Packages have nonnegative integer IDs starting at 0, but they may be received out of order. Support two operations: - receive(id) records that package...
Implement Multi-Player Tic-Tac-Toe
Implement Multi-Player Tic-Tac-Toe Implement a game class for an N by N board and K players. Each player has a distinct one-character printable mark. ...
Rebalance Experiment Buckets with Minimal Reassignment
Rebalance Experiment Buckets with Minimal Reassignment Problem Implement rebalanceBuckets(bucketCount, groups, targetPercentages) -> rebalancedGroups....
Build a Progressive Banking Ledger
Build a Progressive Banking Ledger The source reports the four feature stages but not exact ledger semantics. The APIs, event priorities, cashback tim...
Count Grid Paths Without Three Consecutive Moves
Count Paths Without Three Consecutive Moves A frog starts at (0, 0) and must reach (right_steps, up_steps). Every move is exactly one unit right (R) o...
Minimum Delivery Cost Between Cities
Minimum Delivery Cost Between Cities Implement minimum_delivery_costs(delivery_charges, queries). There are n cities indexed from 0 to n - 1, and city...