Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions

435

Companies

980

Updated

11.12.2026

435 Questions 980 Companies11.12.2026

PLTCHK

"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"

_The_TaNk_

"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"

ChrisSenior SWE, LinkedIn

"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."

sleepy33

"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."

JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord

"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."

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99

"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."

ShrutiData Engineer, Salesforce

"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."

midnightramen

"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."

BiancaFrontend Eng, Figma

"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."

tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa

"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."

PLTCHK

_The_TaNk_

ChrisSenior SWE, LinkedIn

"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."

sleepy33

"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."

JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99

"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."

ShrutiData Engineer, Salesforce

"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."

midnightramen

"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."

BiancaFrontend Eng, Figma

"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."

tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa

"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."

Showing 20 results

J.P. Morgan

Medium

Software Engineer

Compute ring window max and deletion indices

Part A — Ring window maximum: You are given n computers arranged in a circle, represented by an array of bits (1 = on, 0 = off), and an integer k (1 <...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

Implement longest increasing subarray with one deletion

Given an array of integers nums, return the length of the longest strictly increasing contiguous subarray you can obtain by deleting at most one eleme...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings

Remove shortest subarray to sort array

Given an integer array nums (length up to 2×10^5), return the shortest subarray [L,R] you can remove so that the remaining elements form a non‑decreas...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

Find the Lexicographically Smallest Index Pair Whose Values Sum to a Target

Given an integer array nums and an integer target, find two different positions in the array whose values add up to target, and return those positions...

Coding & AlgorithmsArrays & Strings

Decide Whether Repeatedly Summing Squared Digits Reaches 1

Starting from a positive integer, repeatedly replace the number by the sum of the squares of its decimal digits. Return whether this process eventuall...

Coding & AlgorithmsMath & Number Theory

Design a rolling five-minute hit counter

Design an in-memory hit counter that supports: ( 1) recordHit(timestamp) to log an event, and ( 2) getCountLast5Minutes(now) to return the number of e...

Coding & AlgorithmsData Structure DesignTwo Pointers & Sliding Window

Software EngineerSenior+ Locked

Solve Grid Path and Unique Substring

This question evaluates algorithmic problem solving skills in grid traversal and stateful string processing, specifically testing understanding of pat...

Coding & AlgorithmsBacktracking & RecursionTwo Pointers & Sliding Window

Software EngineerIntern Locked

Find shortest subarray with at least k distinct

This question evaluates proficiency in array manipulation, frequency counting, and efficient tracking of distinct values within contiguous subarrays, ...

Coding & AlgorithmsTwo Pointers & Sliding Window

Software Engineer Locked

Solve Throughput, Rate Limiting, and LFU

This set of tasks evaluates algorithmic problem-solving, data structure design, and systems-oriented reasoning by testing throughput calculation, roll...

Coding & AlgorithmsData Structure DesignRate Limiting

Implement course scheduling and rate limiter analysis

You are given two independent coding problems. --- Problem 1: Course Scheduling You are planning to take a set of courses and are given prerequisite r...

Coding & AlgorithmsGraphsTwo Pointers & Sliding Window

Software Engineer Locked

Design iterator for sorted union

This question evaluates algorithmic thinking and iterator-based streaming skills, focusing on merging strictly increasing inputs and deduplicating res...

Coding & AlgorithmsTwo Pointers & Sliding WindowData Structure Design

Software EngineerIntern Locked

Solve array duplicates and two-type subarray

These problems evaluate proficiency with array manipulation, frequency and membership reasoning, and algorithmic analysis of time and space complexity...

Coding & AlgorithmsArrays & StringsTwo Pointers & Sliding Window

Longest Balanced Binary Substring After at Most One Swap

Longest Balanced Binary Substring After at Most One Swap You are given a binary string s. You may swap the characters at any two positions at most onc...

Coding & AlgorithmsArrays & Strings

Find longest substring without repeating characters

Problem Given a string s, return the length of the longest contiguous substring that contains no repeated characters. Input - s: a string (may contain...

Coding & AlgorithmsTwo Pointers & Sliding Window

Software EngineerSenior+ Locked

Implement stream queries and bounded-difference subarrays

This question evaluates proficiency in data structures and algorithmic problem-solving, covering streaming uniqueness tracking (first-non-repeated ele...

Coding & AlgorithmsStacks & QueuesTwo Pointers & Sliding Window

Software EngineerSenior+ Locked

Count Longest Substrings After Character Replacements

Count the longest substring occurrences that can become one repeated uppercase letter within a replacement budget, counting positions rather than repl...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

Implement three interview-style coding tasks

You are given three separate coding tasks, all focused on algorithm and data-structure design. --- Task 1: Longest Bounded-Difference Subarray You are...

Coding & AlgorithmsTwo Pointers & Sliding WindowData Structure Design

Optimize Trapping Rain Water

Question LeetCode 42. Trapping Rain Water – implement a brute-force solution, analyze its complexity, then optimize to an O(n) solution with O(n) spac...

Coding & AlgorithmsTwo Pointers & Sliding WindowDynamic Programming

Data Scientist Locked

Merge two sorted lists

This question evaluates a candidate's competency in array manipulation and merging algorithms, emphasizing understanding of ordered data and time comp...

Coding & AlgorithmsTwo Pointers & Sliding Window

Answer static and streaming Top-K queries

Top-K in static and streaming settings (3 variants) You are given integers and asked to answer Top-K queries under three different scenarios. Variant ...

Coding & AlgorithmsHeaps & Priority QueuesData Structure Design

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Aug 20, 2025

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Tech Interview Questions

Compute ring window max and deletion indices

Implement longest increasing subarray with one deletion

Remove shortest subarray to sort array

Find the Lexicographically Smallest Index Pair Whose Values Sum to a Target

Decide Whether Repeatedly Summing Squared Digits Reaches 1

Design a rolling five-minute hit counter

Solve Grid Path and Unique Substring

Find shortest subarray with at least k distinct

Solve Throughput, Rate Limiting, and LFU

Implement course scheduling and rate limiter analysis

Design iterator for sorted union

Solve array duplicates and two-type subarray

Longest Balanced Binary Substring After at Most One Swap

Find longest substring without repeating characters

Implement stream queries and bounded-difference subarrays

Count Longest Substrings After Character Replacements

Implement three interview-style coding tasks

Optimize Trapping Rain Water

Merge two sorted lists

Answer static and streaming Top-K queries

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