Senior+ Software Engineer Interview Questions
Senior+ software engineer loops (E5/L5 and above) shift the center of gravity away from raw coding and toward system design and leadership. These questions were reported by candidates interviewing for senior+ SWE roles across top tech companies, so they reflect the real senior+ bar: open-ended design rounds where you're expected to drive the architecture and defend trade-offs, behavioral rounds that probe scope, ambiguity, and leading without authority, and a coding bar that stays high but matters less than how you reason about scale. There are 150+ real, recently reported senior+ SWE questions here, spanning coding, system design, and behavioral rounds. Most come with a detailed model answer, so you can see not just whether a senior+ response is correct but whether it operates at the right altitude.
"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."
Count Numbers With Odd Zeros
Given an array a of non-negative integers, count how many elements contain an odd number of digit '0' in their decimal representation. Notes: - Treat ...
Solve Shipping and Bundle-Cost Problems
This question evaluates algorithmic reasoning for scheduling and capacity planning (minimum daily shipping capacity) and combinatorial optimization wi...
Solve substring and worker assignment
The interview included two algorithm problems: 1. Shortest covering substring: Given two strings s and t, return the shortest contiguous substring of ...
Build a Fuzzy Keyword Index
This question evaluates string-processing, text-indexing, approximate string-matching, and data-structure design skills for supporting many repeated q...
Validate IPv4 Address List
This question evaluates proficiency in string parsing, input validation, numeric boundary checks, and algorithmic complexity by requiring verification...
Compute top-N items from log stream
This question evaluates the ability to aggregate frequencies and compute top-N results from logs, covering competencies in frequency counting, top-k a...
Measure platform success and drive adoption
This question evaluates a candidate's competency in platform leadership, operational metrics, organizational scaling, and driving cross-team adoption ...
Explain HashMap Resizing Without Long Pauses
Explain how a hash map works internally. Cover how keys are mapped to buckets, how collisions are handled, and when the table decides to resize. Follo...
Solve substring and top‑K pair problems
This multi-part question evaluates algorithm design and data-structure proficiency across string processing (minimum window substring), pair-selection...
Implement round-robin load balancer
Implement a load balancer that distributes incoming requests across N backend servers in strict round-robin order. Requirements: ( 1) Support addServe...
Describe conflict resolution and mentoring experiences
You are interviewing for an engineering manager or senior engineer role. Prepare structured behavioral answers for these four prompts: 1. Describe a s...
Build a validated add-sub calculator
Given a string expression, write a function that validates and evaluates it. The expression represents arithmetic using only non-negative integers and...
Solve Digit-Square and Grid BFS Problems
Solve the following coding problems. Problem 1: Digit-square convergence Given a positive integer n, repeatedly replace n with the sum of the squares ...
Can You Reach the Last Index?
This question evaluates a candidate's understanding of array traversal and reachability in sequences of jumps, along with the ability to reason about ...
Design a scalable Instagram-like platform
Design a scalable Instagram-like platform Design: Instagram-like Photo/Video Sharing Platform (Technical Screen) Context Design a photo/video sharing ...
Find Each Cell's Nearest Source
Given an m x n grid containing 1 for source cells and 0 for regular cells, compute for every cell the shortest 4-directional distance to any source ce...
Implement store, evaluator, and parser
This question evaluates implementation skills in data structures and algorithms, covering time-based versioning and TTL in an in-memory key-value stor...
Choose lock granularity for concurrent storage
This question evaluates understanding of concurrency control and lock-granularity trade-offs in concurrent storage components, including coarse-graine...
Implement array and tree traversal tasks
This question evaluates algorithmic problem-solving and data-structure competency, specifically array-based optimization for single-trade profit and t...
Parse Requests and Compute Balances
This question evaluates input parsing, state management, data validation, and use of basic data structures to track user accounts, friend relationship...