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."
Predict most likely next word from training data
This question evaluates proficiency in frequency-based language modeling and data-structure design, focusing on token sequence analysis, frequency cou...
Solve four algorithmic problems
Solve the following coding tasks. For each, describe your approach, complexity, and handle edge cases. 1) Make parentheses string valid with minimal d...
Design and implement an LRU cache
This question evaluates knowledge of data structures, algorithmic design, API design, and memory/resource management required to implement an efficien...
Check if a binary tree is complete
This question evaluates understanding of binary tree properties and traversal techniques, testing competency in data structures and algorithmic reason...
Find the Shortest Target-Sum Path
This question evaluates skills in binary tree traversal, path-sum computation, and optimization for selecting a root-to-leaf path with the minimal num...
Compute account balances with rejection and overdraft
You are given a list of transaction records as strings. Each record has the format: ` account_id,timestamp,currency,amount ` - account_id: string iden...
Determine dictionary-based string segmentation
You are given a string s and a set of tokens dict. Determine whether s can be segmented into a sequence of one or more tokens from dict. If segmentati...
Solve sliding-window, flattening, decode, and O(1) random set
This multi-part question evaluates competence in string processing and nested parsing, linked-list flattening and recursion depth management, dynamic ...
Explain arrays and memory layout
What is an array? How is an array represented in memory (contiguous layout, element size and alignment, indexing arithmetic). Analyze time complexitie...
Find Maximum Candies With Two Types
You are given a row of candies represented by an array candies, where candies[i] is the type of the candy at position i. You may choose any starting p...
Solve three coding tasks: binary search, tree path, subarray
Solve three coding tasks: binary search, tree path, subarray Solve the following coding tasks: 1) In a sorted array, every value appears exactly twice...
Explain a shader compiler pipeline
Explain a shader compiler pipeline Describe the architecture of a shader compiler that ingests GLSL/HLSL and outputs SPIR-V or ISA. Cover lexical anal...
Count Valid Infection Orders
This question evaluates combinatorial enumeration and algorithmic reasoning by counting valid sequences of state changes in a linear infection process...
Maximize weighted sum with disjoint adjacent swaps
You are given an integer array arr of length n (0-indexed). Define the weighted sum as: S = Σ_{i=0..n-1} arr[i] * (i + 1). You may perform any number ...
Implement Sliding Windows and LRU Cache
You are given two coding tasks. Task 1: Longest Subarray of Ones Given a binary array nums and an integer k, return the maximum length of a contiguous...
Validate KYC CSV Records
This question evaluates skills in CSV parsing, string normalization, field-level validation, and rule-based text matching, emphasizing attention to ed...
Design Sliding-Window Average Tracker
This question evaluates design and implementation of a time-windowed tracking data structure, focusing on streaming aggregation, handling monotonic ti...
Design a Recoverable Iterator
This question evaluates data-structure and state-management skills, focusing on iterator semantics, snapshotting/restore mechanics, and efficient time...
Implement three whiteboard coding tasks
The interview report described several coding questions in the same category: 1. Binary search: Given a sorted array of integers and a target value, r...
Implement an IPv4 Range Iterator
This question evaluates implementing iterative data structures and range-handling algorithms alongside numeric representation of IPv4 addresses and bi...