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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
PLTCHK testimonial
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_ testimonial
_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"

Chris testimonial
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 testimonial
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."

Jake testimonial
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 testimonial
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."

Carlos testimonial
CarlosFull Stack, Shopify

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

boba.tea.vibes testimonial
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."

Andy testimonial
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 testimonial
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."

Shruti testimonial
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 testimonial
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."

Bianca testimonial
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 testimonial
tambrahm007

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

toa testimonial
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 testimonial
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_ testimonial
_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"

Chris testimonial
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 testimonial
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."

Jake testimonial
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 testimonial
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."

Carlos testimonial
CarlosFull Stack, Shopify

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

boba.tea.vibes testimonial
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."

Andy testimonial
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 testimonial
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."

Shruti testimonial
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 testimonial
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."

Bianca testimonial
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 testimonial
tambrahm007

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

toa testimonial
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
Walmart Labs logo
Walmart Labs
Medium
Software Engineer Locked

Compare Quicksort and Mergesort in Practice

Compare Quicksort and Mergesort as real implementation choices rather than reciting headline complexity. The discussion examines partition and merge i...

Software Engineering Fundamentals
4
0
55 people solved
Jul 17, 2026
Adobe logo
Adobe
Hard
Software Engineer

Design distributed word count without MapReduce

System Design: Distributed Word Frequency Counting (No MapReduce) Context You need to design a distributed system that computes word frequencies over ...

System DesignBatch & Stream ProcessingDistributed Transactions & Idempotency
9
0
142 people solved
Sep 6, 2025
Roblox logo
Roblox
Hard
Data Scientist

Evaluate friend-interaction feature with network interference

Experiment Design: Network-Aware Test for a "Friend Interaction Boost" in Feed Ranking Context You plan to ship a ranking change that boosts items in ...

Analytics & Experimentation
10
0
80 people solved
Oct 13, 2025
Bloomberg logo
Bloomberg
Medium
Software Engineer

Solve Magic Dictionary and unknown traversal

Solve Magic Dictionary and unknown traversal LeetCode 676. Implement Magic Dictionary Determine and implement traversal/encoding that outputs nodes as...

Coding & AlgorithmsData Structure DesignTrees
17
0
159 people solved
Aug 4, 2025
Amazon logo
Amazon
Hard
Applied Scientist

Describe how you reduced measurable cost

Behavioral question (focus on ownership/delivery): > Tell me about a time you identified and solved a problem that caused measurable cost (e.g., cloud...

Behavioral & LeadershipOwnership & Execution
15
0
121 people solved
Feb 9, 2026
Google logo
Google
Medium
Software Engineer Locked

Solve meeting-room scheduling and shortest paths

This question evaluates proficiency in interval scheduling and resource allocation as well as shortest-path computation in weighted directed graphs, e...

Coding & AlgorithmsIntervals & SchedulingGraphs
10
0
180 people solved
Jan 6, 2026
Google logo
Google
Medium
Data Scientist

Detect Overfitting or Underfitting in Logistic Regression Models

Detect Overfitting or Underfitting in Logistic Regression Models Logistic Regression Bias–Variance in High‑Dimensional Ads Prediction Scenario You are...

Machine LearningRegression & Statistical ModelingML Fundamentals
27
0
118 people solved
Aug 4, 2025
Voleon logo
Voleon
Hard
Machine Learning EngineerSenior+

Explain the Bellman Equation

Explain the Bellman Equation State and explain the Bellman expectation and optimality equations. Show how they decompose value into immediate reward a...

Machine Learning
2
0
32 people solved
Jul 31, 2025
Meta logo
Meta
Medium
Software Engineer

Evaluate expression without stack, constant space

Evaluate expression without stack, constant space Given a string s representing a valid arithmetic expression of non-negative integers, the operators ...

Coding & Algorithms
5
0
76 people solved
Jul 27, 2025
Citadel logo
Citadel
Hard
Software Engineer

Discuss queues, NoSQL, and concurrency

System Design Concepts: Messaging, Storage Choices, and Concurrency Context: You are designing distributed services that communicate via events and mu...

System DesignMessaging & Event-DrivenStorage & Sharding
25
0
205 people solved
Sep 6, 2025
Intuit logo
Intuit
Medium
Software Engineer Locked

Format VARCHAR amounts into $ with M/B suffix

This question evaluates a candidate's ability to perform SQL data manipulation tasks such as string-to-number conversion, conditional scaling and suff...

Software Engineering FundamentalsSQL
10
0
76 people solved
Feb 11, 2026
Google logo
Google
Medium
Product Manager

Supermarket Experience Design

Product Design Prompt: Modern Supermarket Experience Pick one focus area for a modern supermarket and go deep: - In-store layout. - Checkout flow. - I...

Product / Decision Making
10
0
60 people solved
Jul 4, 2025
Snapchat logo
Snapchat
Medium
Data Scientist

Monitor Friend-Request System for Quality and Abuse

Friendship +--------------+-------------+---------------------+---------------------+ | requester_id | approver_id | request_ts | approval_ts...

Data Manipulation (SQL/Python)
112
1
375 people solved
Jul 12, 2025
Moody's logo
Moody's
Medium
Software Engineer Locked

Return Binary Search Tree Values in Ascending Order

Decode a breadth-first binary-search-tree representation and return every stored value in nondecreasing order. This task evaluates precise deserializa...

Coding & Algorithms
0
0
9 people solved
Jul 25, 2026
Google logo
Google
Medium
Data Scientist

Establish causality: commute playlist and driving speed

A lawyer worries that listening to a "Commute" playlist in a mobile app makes users drive faster. As the DS: a) Define the population, unit of analysi...

Analytics & ExperimentationCausal InferenceExperiment Design (A/B Testing)
6
0
118 people solved
Oct 13, 2025
Applied Intuition logo
Applied Intuition
Medium
Machine Learning Engineer

Implement and explain positional encoding

Implement Positional Encodings for a Transformer Language Model You are building a Transformer-based language model. Transformers are permutation-equi...

Machine LearningTransformers & AttentionML Coding
17
0
160 people solved
Sep 6, 2025
PayPal logo
PayPal
Medium
Data Scientist

Clean and Analyze User Transactions with Python Functions

transactions +---------+---------------------+---------+ | user_id | trans_ts | amount | +---------+---------------------+---------+ | 11 ...

Data Manipulation (SQL/Python)
106
0
445 people solved
Jul 12, 2025
Capital One logo
Capital One
Medium
Product Manager

How do you make data-driven decisions?

How do you make data-driven product decisions? Describe your approach to using data, customer insight, experiments, and judgment to choose a product d...

Product / Decision MakingMetrics & KPIsAmbiguity & Decision Making
14
0
102 people solved
Feb 28, 2025
Natwest logo
Natwest
Easy
Product ManagerIntern

Answer NatWest behavioral prompts

At a NatWest online interview for an internship program, candidates were asked several behavioral questions. Prepare structured answers to the followi...

Behavioral & Leadership
10
0
105 people solved
Nov 11, 2024
Amazon logo
Amazon
Medium
Software Engineer

Compute rightmost-smaller delay times

Given an integer array priorities, define delay[i] as the distance to the rightmost index j > i such that priorities[j] < priorities[i]; if no such in...

Coding & Algorithms
6
0
56 people solved
Sep 6, 2025
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