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."
Implement an LRU cache
This question evaluates understanding of data structures and algorithmic optimization for constant-time cache operations, with emphasis on cache evict...
Find longest common subsequence length
This question evaluates understanding of dynamic programming and sequence comparison algorithms by asking for the length of the longest common subsequ...
Implement banking, knapsack, and pagination tasks
This multi-part question evaluates stateful system design, ordered event processing and scheduling semantics for an in-memory banking command processo...
Implement a debounced function (with leading option)
This question evaluates mastery of debouncing patterns, timer-based asynchronous control, closures, and preservation of function context and arguments...
Solve three string/stack/backtracking problems
This set evaluates proficiency with algorithmic patterns—stack-based and monotonic-stack reasoning for visibility problems, backtracking for combinato...
Implement array merge, round-robin scheduler, and trading simulator
This multipart problem evaluates algorithmic problem solving and systems-design competencies including in-place array manipulation, queue-based schedu...
Compute balances with transaction fees and rejections
This question evaluates transaction processing, ledger state management, handling of edge cases like insufficient funds and fixed fees, and efficient ...
Determine whether a word exists in a letter grid
This question evaluates algorithmic problem-solving and implementation skills in grid-based search, including concepts like graph traversal and backtr...
Merge overlapping intervals
This question evaluates understanding of interval manipulation, array processing, and algorithmic efficiency by requiring reasoning about overlapping ...
Design a rating aggregator that returns totals and averages
This question evaluates a candidate's competency in designing and implementing data structures and algorithms for maintaining dynamic aggregates (tota...
Implement undo/redo with two stacks
This question evaluates a candidate's ability to design and implement efficient mutable state management and history tracking using data structures (s...
Maximize the minimum value along a grid path
This question evaluates a candidate's competence in graph traversal and path-optimization concepts, emphasizing reasoning about path scores and handli...
Validate hiring request under role constraints
This question evaluates the ability to enforce cardinality constraints and manage state across related entities, testing competencies in data consiste...
Compute distance-sum from every tree node
This question evaluates understanding of tree and graph algorithms, including computation of pairwise distances and techniques for aggregating path le...
Find path between nodes in Fibonacci tree
This question evaluates understanding of recursive tree structures, preorder indexing, implicit tree representations, algorithmic reasoning about node...
Implement a rule-based rate limiter
This question evaluates a developer's ability to implement real-time rule-based rate limiting, covering rule matching, time-windowed quota enforcement...
Implement cursor-based query pagination
You are building a small in-memory database that stores rows with the following fields: - id (string, unique) - score (integer) - payload (string) You...
Detect overlap of two linked lists with cycles
This question evaluates understanding of linked list data structures, cycle detection techniques, pointer/reference identity, and algorithmic time/spa...
Maximize sum with no adjacent tree nodes
This question evaluates understanding of tree-based dynamic programming and stateful optimization for selecting non-adjacent nodes, testing algorithmi...
Find a split-stay booking across listings
This question evaluates understanding of interval coverage and algorithmic problem solving, specifically reasoning about continuous date ranges, split...