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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
StackAdapt logo
StackAdapt
Medium
Software Engineer

Analyze time complexity for dictionary operations

Analyze the time complexity of the following dictionary/hash map operations. (a) Searching for a key: state average-case and worst-case time, and expl...

Coding & Algorithms
14
0
238 people solved
Sep 6, 2025
Amperity logo
Amperity
Medium
Software EngineerSenior+

Design Data Aggregation, Query, and One-Time Secret Systems

Design Data Aggregation, Query, and One-Time Secret Systems Address three independent system-design exercises. For each part, establish requirements, ...

System Design
3
0
45 people solved
Apr 7, 2026
IXL Learning logo
IXL Learning
Easy
Software Engineer

Debug Kubernetes crashes and review Python ingestion script

Part A — Kubernetes: Pod/Container Crash Debugging You are on call and a service deployed to Kubernetes starts failing. The Pod shows CrashLoopBackOff...

Software Engineering FundamentalsContainers & OrchestrationDebugging
6
0
86 people solved
Feb 11, 2026
BlackRock logo
BlackRock
Easy
Software Engineer

Evaluate a verbal reasoning passage

True/False/Cannot Say – Reading Comprehension Instructions Read the passage and label each statement as True, False, or Cannot Say based only on the p...

Statistics & Math
9
0
106 people solved
Sep 6, 2025
Barclays logo
Barclays
Easy
Data Scientist Locked

Determine Worker Counts from Production Ratios

Solve a production-ratio word problem by converting the 2-to-1 item ratio into nail and screw quantities before applying each worker's daily output. T...

Statistics & Math
6
1
46 people solved
Aug 20, 2026
TikTok logo
TikTok
Medium
Data Scientist

Compute CTR drop with exclusions

Assume today = 2025-09-01. Using ad delivery logs, find advertisers whose CTR in the last 7 days (2025-08-25 to 2025-08-31) dropped by at least 20% re...

Data Manipulation (SQL/Python)SQL
9
0
134 people solved
Oct 13, 2025
Roblox logo
Roblox
Hard
Data Scientist

Compute minimum sample size for A/B test

You are implementing a function to compute the minimum total sample size for an A/B test. You are given: - observed: a 1D array of historical/baseline...

Analytics & ExperimentationExperiment Design (A/B Testing)Hypothesis Testing
9
1
127 people solved
Nov 24, 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
Lyft logo
Lyft
Medium
Data Scientist

Investigate Sudden Metric Changes and Design A/B Test

Investigate Sudden Metric Changes and Design A/B Test Scenario A core business metric (e.g., conversion, cancellations, or gross bookings) shows a sud...

Analytics & ExperimentationMetric DiagnosticsExperiment Design (A/B Testing)
69
0
164 people solved
Aug 4, 2025
TripStack logo
TripStack
Hard
Software Engineer

Explain Go concurrency and database choices

Go Concurrency, Cross-Language Comparison, Database Trade-offs, and Storage Design Part A — Concurrency in Go 1. Explain synchronous vs asynchronous e...

System Design
14
0
93 people solved
Sep 6, 2025
TikTok logo
TikTok
Easy
Data Scientist Locked

Define and critique a user activity metric

This question evaluates a candidate's ability to design and critique user-activity metrics, covering event-level instrumentation, metric validity, and...

Analytics & ExperimentationMetrics & KPIsUser Behavior & Funnels
8
0
97 people solved
Nov 15, 2025
Coinbase logo
Coinbase
Medium
Data Scientist

Detect sequence rule and repair anomaly

Implement next_value(seq: list[int]) that detects the rule of a numeric sequence and returns a tuple (model_name, parameters, anomaly_index_or_None, n...

Coding & Algorithms
5
0
89 people solved
Oct 13, 2025
Apple logo
Apple
Medium
Software Engineer

Design a snapshotable key-value store

Design a snapshotable key-value store Design and implement a snapshotable key–value map supporting the following APIs: - S(key, value): set the curren...

Coding & AlgorithmsData Structure Design
18
0
214 people solved
Aug 8, 2025
DoorDash logo
DoorDash
Hard
Data Scientist

Design an experiment for order batching

Experiment Design: Two-Order Batching Policy During Peak Hours Context DoorDash plans to test a dispatch policy that allows a dasher to pick up two ne...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
15
0
210 people solved
Oct 13, 2025
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
Tesla logo
Tesla
Medium
Machine Learning Engineer

Compute nearest index within threshold after walking distances

You are given: ( 1) points: a list of N 2D coordinates in miles, points[i] = [x_i, y_i], ordered; ( 2) distances: a list of M nonnegative floats (mile...

Data Manipulation (SQL/Python)
5
0
54 people solved
Aug 12, 2025
Databricks logo
Databricks
Medium
Machine Learning EngineerSenior+ Locked

Resolve a Design Conflict

This question evaluates conflict resolution, stakeholder management, technical decision-making, and collaborative leadership skills within a Machine L...

Behavioral & Leadership
10
0
71 people solved
Feb 7, 2026
Google logo
Google
Hard
Software Engineer

Find longest duplicated substring

You are given a string s consisting of lowercase English letters. A substring of s is any contiguous sequence of characters, i.e., s[i..j) for 0 ≤ i <...

Coding & AlgorithmsString AlgorithmsBinary Search
15
0
204 people solved
Dec 8, 2025
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
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
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