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."
Parallelize chunked file download and verify integrity
This question evaluates understanding of parallelized I/O, concurrency control, failure and retry handling, and data-integrity verification for chunke...
Implement bitmap font render/compress/invert
This question evaluates proficiency in bitmap and matrix manipulation, lossless compression/decompression techniques, and modular code reuse for trans...
Implement bitmap-based block allocator
The bitmap-based block allocator evaluates understanding of data structures, contiguous allocation algorithms, and low-level state management; it is c...
Format words into wrapped/justified lines
This question evaluates practical programming skills in string processing, greedy packing, and careful handling of spacing and edge cases, and falls u...
Compute total revenue from greedy VM rentals
This question evaluates understanding of greedy allocation strategies and the ability to maintain dynamic summaries (tracking current maximum and smal...
Compute minimum servers for cyclic tasks
This question evaluates understanding of interval scheduling, overlap detection, and handling cyclic time via modular arithmetic for tasks that wrap p...
Build a next-word frequency predictor
This question evaluates understanding of data structures and algorithms for frequency counting and associative lookups, including preprocessing-versus...
Compute board-game score from regions
This question evaluates grid traversal and connected-component identification skills along with region-based aggregation (counting cells and summing c...
Extend BFS maze solver with keys and arrows
This question evaluates mastery of breadth-first search, state-space modeling for grid-based traversal, and handling augmented states like keys and on...
Solve common string/tree/grid interview tasks
This problem set evaluates practical coding competencies including string parsing and sign handling, positional and frequency-based matching for feedb...
Validate BFS order queries on a tree
You are given an undirected tree described by two equal-length arrays u and v (each of length n-1). For every index i, there is an undirected edge bet...
Remove duplicates in-place from unsorted array
This question evaluates understanding of in-place array manipulation, duplicate removal, and algorithmic analysis under strict extra-space constraints...
Calculate charge with a single price override
This question evaluates understanding of interval arithmetic, overlap detection and aggregation for time-based billing, plus careful edge-case handlin...
Min boards to cover roof holes
This question evaluates competency in combinatorial optimization and problem modeling for coverage constraints, testing algorithmic reasoning, complex...
Implement Fibonacci generator, balanced BST, frozenset
This question evaluates proficiency in core data structures and algorithms with a focus on Python-specific features, testing generator semantics (yiel...
Implement a debounce function
This question evaluates a candidate's ability to implement a debounce utility using runtime features such as closures, timers, and function-context pr...
Merge overlapping time intervals
This question evaluates competence in interval and array manipulation, sorting-based algorithm design, overlap detection, and efficient time/space com...
Implement topological sort and tree boundary traversal
You are given two separate coding tasks. Problem A — Order courses with prerequisites You have n courses labeled 0..n-1 and a list of prerequisite pai...
Compute product of array except self
This question evaluates understanding of array manipulation, modular arithmetic, and algorithmic optimization by requiring computation of per-element ...
How to find the cheapest flight within K stops
This question evaluates understanding of graph algorithms and constrained shortest-path modeling, focusing on reasoning about weighted directed edges,...