Pinduoduo Coding & Algorithms Interview Questions
Practice the exact questions companies are asking right now.
"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 Followable Microblog Timeline
Implement a Followable Microblog Timeline Design an in-memory microblog service with these operations: `text post(user_id, tweet_id) follow(follower_i...
Generate a Matrix in Spiral Order
This question evaluates a candidate's ability to simulate array traversal and manage boundary conditions when filling a matrix in a specific geometric...
Design a Recency-Eviction Cache
This question evaluates proficiency with data structures and algorithmic design for implementing a fixed-capacity key-value cache that enforces recenc...
Compute User Login Streaks
This question evaluates SQL proficiency in processing event logs for time-series analysis, encompassing date arithmetic, deduplication of same-day eve...
Compute longest increasing subsequence length
This question evaluates understanding of sequence analysis and algorithmic problem solving, assessing competency with subsequences, reasoning about co...
Find Shortest Square-Sum Path
This question evaluates algorithmic problem-solving skills with number-theoretic reasoning about perfect squares and the ability to reconstruct a mini...
Validate a Binary Search Tree
Validate a Binary Search Tree Problem Given a binary tree, return whether it is a valid binary search tree. For every node, every value in its left su...
Traverse a Matrix in Spiral Order
Traverse a Matrix in Spiral Order Problem Given an m x n matrix, return all elements in clockwise spiral order. Begin at the top-left corner, move rig...
Determine Straight Flush
This question evaluates competency in algorithmic pattern detection and data-structure manipulation applied to domain-specific representations, focusi...
Find next greater element for subset
You are given two integer arrays query and nums. - All elements in nums are distinct. - Every element in query also appears in nums. For each value x ...
Find missing rank in a straight
You are given a list of 4 distinct characters representing card ranks from a 5-card straight (5 consecutive ranks) with exactly one rank missing. Rank...