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 a Snapshot Set Iterator
This question evaluates data structure design, versioning, and iterator consistency concepts within the Coding & Algorithms domain, focusing on implem...
Find LCA With Parent Pointers
This question evaluates understanding of tree data structures and ancestor relationships, focusing on lowest common ancestor reasoning with parent poi...
Find the Most Common Visit Pattern
This question evaluates the ability to process timestamped event logs and extract ordered length-3 visit sequences, testing skills in sorting, frequen...
Merge Multiple Sorted Arrays
This question evaluates a candidate's competency in array manipulation, merging techniques, and algorithmic complexity analysis, including handling ed...
Maximize Value Under a Budget
This question evaluates combinatorial optimization and algorithm design skills for resource-constrained selection problems, focusing on concepts exemp...
Find Common Prefix Across Strings
This question evaluates proficiency in string manipulation and array processing, focusing on identifying common prefixes, handling edge cases such as ...
Implement a TTL LRU Cache
This question evaluates understanding of in-memory cache design, including per-entry TTL expiration, LRU eviction, and the data structure and complexi...
Count All-One Square Submatrices
This question evaluates dynamic programming, matrix traversal, and algorithmic optimization skills for identifying and counting structured patterns in...
Minimize Boys Needed Beside Girls
This question evaluates string and array manipulation skills, the ability to model adjacency-based constraints, and optimization reasoning for minimiz...
Determine Safe Bomb Defusal
This question evaluates competency in graph traversal, state-space search, reachability analysis, and handling safety constraints within finite state ...
Find the Unique Element in Pairs
This question evaluates a candidate's ability to design time- and space-efficient algorithms for sorted array problems, focusing on identifying a sing...
Determine Balloon Popping Time
This question evaluates understanding of grid-to-graph modeling, reachability and propagation dynamics, and handling heterogeneous spread times within...
Return the K Smallest Integers
Return the K Smallest Integers Given an unsorted list of integers and an integer k, return the k smallest values in ascending order. Preserve duplicat...
Determine Whether Two Integers Sum to a Target
Determine Whether Two Integers Sum to a Target Given a list of integers and a target integer, return whether two elements at distinct indices add up t...
Find Earliest Column With One
This question evaluates algorithmic problem-solving and optimization skills for working with a row-wise sorted binary matrix accessed via an API, focu...
Solve Multiple Coding Interview Problems
This multi-part question evaluates skills in graph traversal and shortest-path reasoning (minimum transit routes), precise string and numeric manipula...
Evaluate a Formula AST with Variables
Evaluate a Formula AST with Variables Extend a Boolean-formula evaluator so the AST may contain variable references. Resolve each variable from a supp...
Find a Valid Course Order
This question evaluates graph algorithm skills—specifically topological ordering, directed cycle detection, and analysis of time and space complexity....
Implement Last-Click Attribution APIs
This question evaluates a candidate's ability to implement stateful, time-windowed event matching and attribution, testing skills in data structures, ...
Solve Flower Placement and Directory Deletion
This question evaluates combinatorial constraint-satisfaction and permutation/matching skills for the flower-placement grid alongside filesystem trave...