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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 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
Waymo logo
Waymo
Medium
Machine Learning Engineer

Explain Model Compression Techniques

Explain quantization-aware training, knowledge distillation, evaluation mode in deep learning frameworks, and contrastive learning. For each topic, de...

Machine LearningNeural Networks & Training
7
0
129 people solved
Nov 27, 2025
Robinhood logo
Robinhood
Medium
Software EngineerSenior+

Present a Project With Correctness Guarantees

Prepare a 1-2 slide presentation about a system or product you personally built, owned, or significantly improved. In the interview, walk through: - t...

Behavioral & LeadershipProject Deep DiveDistributed Transactions & Idempotency
7
0
130 people solved
Jan 14, 2026
Adobe logo
Adobe
Medium
Software Engineer

Determine task order with prerequisites

You are given n tasks labeled 0..n−1 and a list of prerequisite pairs (a, b) meaning task b must be completed before task a. Determine one valid order...

Coding & AlgorithmsGraphs
14
0
100 people solved
Sep 6, 2025
Rippling logo
Rippling
Medium
Data Analyst Locked

Build a Gap-Free Monthly Booking Summary

Build a PostgreSQL monthly report that fills missing calendar periods for each product and booking type. Practice distinct-customer counts, cumulative...

Data Manipulation (SQL/Python)
4
0
37 people solved
May 28, 2026
Google logo
Google
Medium
Software Engineer Locked

Find where to cut cake into equal areas

This question evaluates geometric area computation, handling of piecewise-constant profiles formed by adjacent rectangles, and attention to numerical ...

Coding & AlgorithmsMath & Number TheoryArrays & Strings
13
0
120 people solved
Jan 6, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Find and remove duplicate files

Given a directory tree that may not fit in memory, detect and optionally remove duplicate files. Define the algorithm, including how you handle very l...

Coding & AlgorithmsFile & Media StorageOperating Systems
31
0
241 people solved
Jul 26, 2025
Snapchat logo
Snapchat
Medium
Machine Learning Engineer

Determine and print expression to reach target

You are given four numbers and a target T (e.g., 24). Using +, −, ×, ÷ and parentheses, and using each number exactly once, determine whether you can ...

Coding & Algorithms
6
0
70 people solved
Sep 6, 2025
Remitly logo
Remitly
Hard
Software Engineer

Design a Production-Ready URL Shortener

System Design: Production-Ready URL Shortening Service Goal Design a production-ready URL shortening service that can issue short links, resolve them ...

System DesignSystem Design FundamentalsCaching
14
0
136 people solved
Aug 13, 2025
C3 AI logo
C3 AI
Hard
Data Scientist Locked

Find the Intersection of Two Linked Chains

Find the first shared node of two acyclic linked chains using node identity and constant extra space. Practice the pointer-switching technique for une...

Coding & Algorithms
1
0
19 people solved
Aug 15, 2026
Jane Street logo
Jane Street
Hard
Software Engineer

Evaluate a Tokenized Arithmetic Expression

Evaluate a Tokenized Arithmetic Expression You are given an arithmetic expression that has already been tokenized for you — you do not need to write a...

Coding & AlgorithmsStacks & Queues
39
2
318 people solved
Sep 14, 2022
DoorDash logo
DoorDash
Hard
Software EngineerSenior+

Handle a payment-service incident with resource spikes

Handle a payment-service incident with resource spikes Incident Response and Resilience: Payment Integration Service Outage Context You own an interna...

Behavioral & LeadershipReliability & SREFault Tolerance & Failover
17
0
122 people solved
Jul 17, 2025
Pinterest logo
Pinterest
Medium
Data Scientist

Explain BLS vs CLS; compute t-stats

Part A — Concepts: Define Brand Lift Study (BLS) vs Conversion Lift Study (CLS) in ads measurement. List key bias/variance sources for each (e.g., non...

Statistics & MathCausal InferenceHypothesis Testing
33
0
223 people solved
Oct 13, 2025
Chime logo
Chime
Easy
Software Engineer

Explain sync/async, Go concurrency, SQL vs NoSQL

You are interviewing for a backend engineering role. Answer the following conceptual questions clearly and with concrete examples. 1) Synchronous vs a...

Software Engineering FundamentalsConcurrencyStorage & Sharding
31
0
288 people solved
Nov 13, 2025
Akuna Capital logo
Akuna Capital
Medium
Software Engineer

Design communication handler and exceptions

Implement a Communication Handler with Exceptions Context You are building a single-line communication handler that can connect exactly two Caller ins...

System Design
5
0
92 people solved
Sep 6, 2025
Intersystems logo
Intersystems
Easy
Software EngineerNew Grad

Find the longest palindromic substring

Problem Given a string s, find the longest contiguous substring of s that is a palindrome (reads the same forward and backward). Input - A string s co...

Coding & Algorithms
4
0
59 people solved
Feb 11, 2026
Google logo
Google
Easy
Software Engineer Locked

Build a next-word frequency predictor

This question evaluates understanding of data structures and algorithms for frequency counting and associative lookups, including preprocessing-versus...

Coding & AlgorithmsData Structure Design
45
1
318 people solved
Feb 12, 2026
Capital One logo
Capital One
Medium
Data Scientist

Critique and Test Python Preprocessing Utilities Effectively

Scenario Code review of Python preprocessing utilities (OutlierHandler and three Imputer classes) Question Summarize, at a high level, what the Outlie...

Coding & Algorithms
14
0
104 people solved
Aug 4, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Diagnose Cold Food Deliveries with Key Metrics Analysis

Diagnose Cold Food Deliveries and Test a Fix A food-delivery platform is receiving a spike in customer complaints that delivered meals arrive cold. Yo...

Analytics & ExperimentationMetric DiagnosticsExperiment Design (A/B Testing)
52
0
263 people solved
Jul 12, 2025
Google logo
Google
Medium
Software Engineer

Maximize coins collected by 3-step pieces

You are given a 1D board of length N. Each cell is in one of three states: - Empty - Piece (a movable token) - Coin (collectible) In one move, you may...

Coding & AlgorithmsSimulation & State Machines
7
0
115 people solved
Sep 5, 2025
Google logo
Google
Medium
Software Engineer Locked

Reconstruct original array from doubled shuffle

This question evaluates array manipulation, multiset/frequency reasoning, pairing logic, and careful handling of edge cases such as zeros and negative...

Coding & Algorithms
9
0
81 people solved
Jan 4, 2026
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