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."
Print the File System State
This question evaluates a candidate's ability to serialize and format in-memory data structures for deterministic textual output, focusing on represen...
Validate Adding an Edge to a Directed Acyclic Graph
Determine whether a proposed directed edge is new and can be added to an existing DAG without creating a cycle. Reject self-loops and duplicates, then...
Calculate Trapped Rain Water
Calculate how much rain water is trapped between nonnegative unit-width bars without mutating the input. A two-pointer scan tracks the highest boundar...
Reconstruct the Alphabet Order of an Alien Language
This question tests graph construction and topological sorting, core algorithmic skills for reasoning about partial orderings derived from constraints...
Merge Overlapping Intervals
This question tests practical array manipulation and sorting skills by requiring candidates to consolidate overlapping numeric intervals into a minima...
Can All Courses Be Completed?
This question tests graph traversal and cycle detection skills, specifically the ability to model dependency relationships as a directed graph. It eva...
Shift Non-Zero Elements Left In Place
This question tests a candidate's ability to perform in-place array manipulation while preserving element order, evaluating practical understanding of...
Calculate Bowling Game Score
This question evaluates a candidate's ability to implement rule-based scoring logic, array processing, and stateful iteration to correctly aggregate f...
Find Top Errors in Time Window
This question evaluates the ability to parse JSON logs, apply time-window filtering with inclusive/exclusive boundaries, aggregate error frequencies, ...
Maximize Throughput and Count Trigger Components
This question evaluates proficiency in algorithmic optimization under resource constraints (maximizing pipeline throughput within a budget) and in mod...
Replace Delimited Tokens in a String
This question evaluates string parsing, token recognition, and dictionary lookup competencies for robust text replacement, including handling malforme...
Analyze Reports in a Nested Org Chart
Analyze a nested organization chart and classify every employee as an individual contributor or manager. Compute direct and total descendant counts in...
Map Weighted Random Draws to Indices
Map deterministic draws to weighted indices using cumulative ranges. Support large weights and many queries while preserving draw order and respecting...
Find Intersections Between Two Interval Lists
Find every non-empty intersection between two sorted lists of disjoint closed intervals. Preserve ascending order and correctly include intersections ...
Count Pairs with the Minimum Absolute Difference
Count unordered index pairs whose values have the minimum absolute difference in an integer array. Sorting reveals the minimum gap, while duplicate ru...
Traverse an HTTP Maze with Retry Handling
Traverse a simulated HTTP maze with breadth-first search to return the shortest route from a start URL to an exit. Handle links, malformed input, succ...
Solve Two Robbery Optimization Variants
This question evaluates competence in dynamic programming for linear optimization and recursion/tree DP for hierarchical structures, as well as the ab...
Solve Matrix Traversal and Pair Sum
This question evaluates proficiency in array and matrix manipulation, including spiral traversal with boundary and edge-case handling, index managemen...
Minimize Circular Redistribution Cost
This question evaluates algorithmic problem-solving skills in array manipulation, circular data structures, load balancing, and cost optimization whil...
Implement a Snapshot Set Iterator
This question evaluates data structure design, versioning, and iterator consistency concepts within the Coding & Algorithms domain, focusing on implem...