Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions

12.2k

Companies

569

Updated

10.14.2026

12.2k Questions 569 Companies10.14.2026

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

Snowflake

Medium

Software Engineer

Discuss challenges and cross-functional collaboration

Question Tell me about your most challenging project. Walk me through it end to end and be ready to go deep on the technical and the organizational si...

Behavioral & LeadershipProject Deep DiveAmbiguity & Decision Making

Check if a numeric string is divisible by 8

Question You are given a very large non-negative integer represented as a decimal string s (it may be too large to fit in standard 64-bit integer type...

Find maximum value in huge text file

You are given the path to a very large text file on disk. The file has the following properties: - Each line contains exactly one signed 64-bit intege...

Coding & AlgorithmsConcurrency

Define and sample a truncated normal

Define the truncated normal Z | a < Z < b for Z ~ N(0,1): write the normalized pdf and cdf. Then design efficient samplers for three cases: (i) a = 1,...

Implement a same-host web crawler

Implement a web crawler. Given a start URL and a function get_links(url) -> list of URLs, return all URLs that share the same hostname as the start. A...

Coding & AlgorithmsGraphs

Determine equality of arbitrarily nested sets

Implement a function that determines whether two arbitrarily nested sets are equal. Sets are unordered and contain no duplicates; elements can be inte...

Coding & AlgorithmsBacktracking & Recursion

Find word sequence with 1–2 char changes

Given a beginWord, an endWord, and a dictionary (wordList) of unique same-length lowercase words, determine whether there exists a transformation sequ...

Coding & AlgorithmsGraphs

Write SQL and pandas for shopping events

Use the schema and sample data below to answer SQL and pandas tasks. Treat 'today' as 2025-09-01. Schema users(user_id INT, country STRING) pins(pin_i...

Data Manipulation (SQL/Python)

Implement Trie search with wildcard matching

Design a text dictionary using a Trie. Support the following operations: - addWord(word): Insert a lowercase English word. - search(pattern): Return t...

Coding & AlgorithmsString Algorithms

Compute monthly new subscribers and YoY deltas

Write a single SQL query that returns monthly counts of new subscribers starting at 2019-06, plus year-over-year (same-month prior year) comparisons. ...

Data Manipulation (SQL/Python)

Compute monthly CRR with merges and gaps

You are given PostgreSQL tables user_profile(user_id, signup_ts, country, is_employee, is_test), user_events(user_id, event_ts, event_type, revenue, p...

Data Manipulation (SQL/Python)SQLSegmentation & Cohort Analysis

Software Engineer Locked

Count Replacements Needed to Separate Equal Adjacent Characters

Count the minimum replacements needed to eliminate equal adjacent characters across many lowercase words by reducing each maximal repeated run without...

Evaluate arithmetic expression using DFS

Given a string representing an arithmetic expression with non-negative integers, +, -, *, /, parentheses, and optional spaces, evaluate its value. Use...

Coding & AlgorithmsParsing & InterpretersStacks & Queues

Data Scientist Locked

Analyze time series and design validation experiment

This question evaluates competency in time series analysis, change-point detection, count-based forecasting, causal inference and experiment design, a...

Analytics & ExperimentationTime Series & ForecastingCausal Inference

Analyze profits under random walk and Brownian motion

Analyze profits under random walk and Brownian motion Random-Walk Trading Rules: Expectation and Variance Setup - Let (S_t) be a simple random walk fo...

Statistics & MathProbability

Software Engineer Locked

Implement a debounce function

This question evaluates a candidate's ability to implement a debounce utility using runtime features such as closures, timers, and function-context pr...

Coding & AlgorithmsJavaScript & TypeScriptConcurrency

Backend EngineerSenior+

Compute time to burn tree

Given the root of a binary tree and the value of a target node that starts burning at time 0, fire spreads every minute from a burning node to its lef...

Quantitative Trader Locked

Analyze distribution of a 3-dice product

This question evaluates probability and statistical inference skills including computation of expectation, properties of discrete order statistics (po...

Data Scientist Locked

Test if one value comes from N(μ,σ²)

Formulate a two-sided test of whether a single observed value comes from a normal distribution with known mean and standard deviation, giving the test...

Design A/B test for credit card offer

A/B Test Design: New Credit-Card Acquisition Flow (Revised APR Disclosure + Signup Bonus) Context You are launching a new credit-card acquisition flow...

Analytics & ExperimentationExperiment Design (A/B Testing)Hypothesis Testing

138 people solved

Oct 13, 2025

Tech Interview Questions

Discuss challenges and cross-functional collaboration

Check if a numeric string is divisible by 8

Find maximum value in huge text file

Define and sample a truncated normal

Implement a same-host web crawler

Determine equality of arbitrarily nested sets

Find word sequence with 1–2 char changes

Write SQL and pandas for shopping events

Implement Trie search with wildcard matching

Compute monthly new subscribers and YoY deltas

Compute monthly CRR with merges and gaps

Count Replacements Needed to Separate Equal Adjacent Characters

Evaluate arithmetic expression using DFS

Analyze time series and design validation experiment

Analyze profits under random walk and Brownian motion

Implement a debounce function

Compute time to burn tree

Analyze distribution of a 3-dice product

Test if one value comes from N(μ,σ²)

Design A/B test for credit card offer

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