Software Engineer Coding & Algorithms Interview Questions
Practice 2,743 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."
Solve common search/parse/graph frequency tasks
This multi-part question evaluates algorithmic problem-solving skills across searching and sorting variants, rotated-array search, nested string decod...
Reconstruct route from unordered travel tickets
This question evaluates understanding of directed graph concepts and sequence reconstruction, assessing the ability to reason about ordered relationsh...
Design a dynamic leaderboard with rank queries
This question evaluates proficiency with dynamic data structures and order-statistics, including maintaining sorted order under updates, deterministic...
Build message schema parser with size/type queries
This question evaluates parsing of a simple message schema, construction of mappings from field names to primitive types and byte sizes, and computati...
Minimize travel time with optional meeting point
This question evaluates a candidate's understanding of graph shortest-path computation and meeting-point optimization, testing skills in handling weig...
Validate a JSON-like string
This question evaluates parsing and string-processing skills, focusing on structural validation of JSON-like text including matching and nesting of br...
Maximize capacity with primary-backup pairing
This question evaluates combinatorial optimization and constrained matching skills, focusing on algorithm design, complexity analysis, and resource-al...
Find where to cut cake into equal areas
This question evaluates geometric area computation, handling of piecewise-constant profiles formed by adjacent rectangles, and attention to numerical ...
Find viewing direction that sees most points
This question evaluates computational geometry skills, angular normalization and counting within a sector, and the ability to design algorithms that s...
Resolve user roles across account hierarchy
This question evaluates understanding of hierarchical data structures, role-based access control semantics, and set/map operations for computing effec...
Compute balances, rejections, and platform reserve
This question evaluates transactional state management, time-ordered stream processing, balance reconciliation, handling of rejected transactions, and...
Verify business accounts with progressive KYC rules
This question evaluates skills in string parsing, text normalization, rule-based validation, and token-based string matching within a KYC verification...
Find global GPU idle intervals
This question evaluates competency in interval reasoning, managing overlapping time ranges across distributed resources, designing online data structu...
Answer four array/time/grid query questions
This set of four problems evaluates array manipulation and comparison, time parsing and minute-difference calculation, linear path enumeration with ex...
Find longest increasing contiguous subarray
This question evaluates proficiency in array processing and algorithmic optimization, focusing on recognition of contiguous subarray properties and ha...
Solve linked list, string filtering, and puzzle
This multi-part question evaluates proficiency with linked-list pointer manipulation and constant-space linear-time algorithms, pattern-driven string ...
Find median of merged RLE arrays
The question evaluates understanding of run-length encoding, order-statistics (median) computation, and efficient merging of frequency-annotated seque...
Implement iterator merging lists with filtering
This question evaluates iterator/generator design, sequence merging, stateful filtering and deduplication, checking a candidate's ability to maintain ...
Find linked merchants by shared fields
This question evaluates the ability to model and detect entity linkages via exact field matching and weighted scoring as well as to reason about reach...
Implement agent voting with average and sorting
Design an in-memory “agent voting” module that records ratings agents give to items (e.g., tickets/articles). Requirements: - Each vote is: (agentId, ...