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."
Parse logs and count error codes
This question evaluates parsing and sanitizing structured text, extracting specific fields, and performing frequency aggregation of identifiers such a...
Maximize protected population and bitwise AND
This paired problem evaluates array manipulation and resource-allocation reasoning for maximizing covered population in a constrained-movement scenari...
Minimize run-length encoded length with deletions
This question evaluates proficiency in string manipulation, run-length encoding concepts, and dynamic programming-based optimization under deletion co...
Compute max profit from one stock trade
Given an integer array prices where prices[i] is the stock price on day i, compute the maximum profit you can achieve by choosing at most one day to b...
Compute max reachable cells per threshold
This question evaluates a candidate's ability to reason about constrained grid reachability and efficient handling of multiple threshold queries, test...
Find max equal-frequency block count for each prefix
This question evaluates proficiency in string processing, frequency-vector reasoning, and prefix-based partitioning to determine equal-frequency conti...
Check pivot after removing one element
This question evaluates array-manipulation skills, cumulative-sum/prefix-sum reasoning, and robustness in handling negative values and duplicates, tes...
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...
Compute conflicts and minimum meeting rooms
You are given a list of meeting room booking requests. Each request is a half-open time interval [start, end), meaning it uses the room starting at st...
Find smallest permutation under constraints
This question evaluates digit-manipulation and combinatorial permutation skills, along with numeric ordering and representation concerns such as leadi...
Compute minimum number of rooms needed
Problem You are given a list of meetings, each with a start time and end time. A single room can host only one meeting at a time. Two meetings overlap...
Zero out duplicates and sort an array
Coding question You are given an integer array arr of length about 75. - The data is not sorted. - The array may contain duplicate values. - You must ...
Determine feasibility and clean parentheses string
This pair of problems evaluates proficiency with graph algorithms (dependency modeling and cycle detection/topological ordering) and string processing...
Find largest connected group of overlapping intervals
You are given n people, where person i works during an inclusive time interval [start_i, end_i]. Define a communication graph: - Each person is a node...
Predict output when iterating ordered keys
This question evaluates understanding of ordered maps, iteration semantics, reverse traversal and accumulation of values in code. It is commonly asked...
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...
Compute days until a higher reading
You are given an array readings[] representing sensor values over consecutive days (e.g., temperatures). For each day i, compute how many days you mus...
Min deletions to avoid overlap in first k
This question evaluates array and sequence manipulation skills, set-based reasoning about value overlap, and the ability to compute minimal edits whil...
Merge overlapping time intervals
This question evaluates competence in interval and array manipulation, sorting-based algorithm design, overlap detection, and efficient time/space com...
Multi-Level Warehouse Storage with Weighted Retrieval
Multi-Level Warehouse Storage with Weighted Retrieval You are building the in-memory engine for an automated warehouse. The warehouse is a stack of ho...