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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
Google logo
Google
Medium
Data ScientistSenior+

Simulate Uniform(0,1) from random bits

Assume you have access to a function rand_bit() that returns 0 or 1 with equal probability and independent across calls. How would you generate a rand...

Coding & Algorithms
7
0
115 people solved
Nov 24, 2025
Capital One logo
Capital One
Medium
Data Scientist

Validate Unit-Test Coverage and Identify Missing Scenarios

Validate Unit-Test Coverage and Identify Missing Scenarios Scenario Tech round: reviewing an existing unit-test that exercises the class from Part 2 Q...

Coding & AlgorithmsTesting & Quality
11
0
140 people solved
Aug 4, 2025
Apple logo
Apple
Medium
Software Engineer Locked

Work Productively with Someone Who Disagrees

Describe a meaningful disagreement with someone you still needed to work with closely. Show how you understood their concerns, adjusted your own appro...

Behavioral & Leadership
2
0
30 people solved
Jun 3, 2026
OpenAI logo
OpenAI
Easy
Data Scientist

Compute signup rate and retention from raw logs

Scenario You are analyzing an A/B test for a marketing campaign offering a free 1-month trial. You are given raw “upstream” tables that resemble produ...

Data Manipulation (SQL/Python)Experiment Design (A/B Testing)Metrics & KPIs
11
0
97 people solved
Oct 4, 2025
Optiver logo
Optiver
Medium
Software Engineer

Build and Validate a Binary Tree from Parent-Child Pairs

Build and Validate a Binary Tree from Parent-Child Pairs You are given a single input string that is supposed to describe a binary tree as a sequence ...

Coding & Algorithms
9
0
97 people solved
Apr 21, 2026
Virtu Financial logo
Virtu Financial
Medium
Data Scientist

Implement Connect Four Winner Detection

Implement a Connect Four-style game engine. The board has 6 rows and 7 columns. Two players alternate turns. On each turn, the current player chooses ...

Coding & Algorithms
14
0
96 people solved
Jan 22, 2026
Home Depot logo
Home Depot
Medium
Data Analyst

Debug row loss after SQL joins

You are reviewing a buggy SQL query used by a retail analytics team at a home-improvement company. The query is supposed to return daily promo sales f...

Data Manipulation (SQL/Python)SQLDebugging
12
1
161 people solved
Dec 15, 2025
Together logo
Together
Medium
Software Engineer

Design a Task Scheduler Across Multiple Compute Clusters

Design a task scheduling system that assigns many tasks to multiple compute clusters and tracks each task through completion. Requirements and Constra...

System DesignJob Scheduling & WorkflowsDistributed Coordination
2
0
19 people solved
Apr 19, 2026
Oracle logo
Oracle
Medium
Software Engineer

Find Each Island's Maximum Height

Find Each Island's Maximum Height A rectangular grid uses 0 for water and a positive integer for each land cell's height. Land cells connect only thro...

Coding & Algorithms
2
0
20 people solved
Aug 18, 2026
NVIDIA logo
NVIDIA
Medium
Software Engineer Locked

Clarify and Design a Streaming Top-K Tracker

Turn an underspecified streaming top-k request into a precise ranking and time-window contract, then compare heap, ordered-count, and bounded-bucket d...

Software Engineering Fundamentals
1
0
28 people solved
Jun 16, 2026
Oracle logo
Oracle
Medium
Software EngineerSenior+ Locked

Communicate a Difficult Decision to Stakeholders

Describe communicating a difficult technical or delivery decision that changed scope, timing, risk, or a promised outcome. Explain alternatives and un...

Behavioral & Leadership
0
0
15 people solved
Aug 21, 2026
Tesla logo
Tesla
Easy
Software Engineer Locked

Generate Per-Position Guess Feedback

This question evaluates string-processing skills, array manipulation, and handling of duplicate character counts to produce per-position feedback. It ...

Coding & Algorithms
4
0
44 people solved
May 15, 2026
BlackRock logo
BlackRock
Medium
Software Engineer

Implement sorting and set intersection with input parsing

Write two functions and explain your approach in under two minutes after coding: (A) Sorting: Implement sort_numbers(nums: List[int]) -> List[int] tha...

Coding & Algorithms
12
0
121 people solved
Sep 6, 2025
NVIDIA logo
NVIDIA
Medium
Data EngineerSenior+

Merge Overlapping Time Intervals

You are given a list of closed time intervals. Each interval is represented as [start, end], where start <= end. Write a function that returns the sma...

Coding & Algorithms
2
0
29 people solved
May 3, 2026
Capital One logo
Capital One
Medium
Software Engineer Locked

Design a geography-aware virtual card service

This question evaluates a candidate's ability to design secure, low-latency, geography-aware payment systems, covering distributed systems architectur...

System DesignPayments & Ledgers
72
0
552 people solved
Feb 12, 2026
Uber logo
Uber
Medium
Machine Learning Engineer

Where to apply ML in a task flow from customer request to driver-uploaded evidence

This was a short, free-form design discussion at the end of a phone screen. The interviewer described a platform on which customers submit tasks that ...

ML System DesignLLM ApplicationsModel Evaluation
0
0
6 people solved
Aug 5, 2026
IBM logo
IBM
Medium
Software Engineer

Compute shared free time intervals

You are given schedules for multiple employees. schedules[i] is a list of busy intervals for employee i, where each interval is half-open [start, end)...

Coding & Algorithms
11
1
117 people solved
Sep 6, 2025
Apple logo
Apple
Hard
Software Engineer Locked

Minimum Cells to Bridge a Magic Grid

This question evaluates proficiency in graph traversal and shortest-path optimization within a 2D grid, testing the ability to find minimum-cost conne...

Coding & Algorithms
5
1
70 people solved
Jun 8, 2026
LinkedIn logo
LinkedIn
Medium
Software Engineer Locked

Find the K Closest Values in a Sorted Array

Find exactly k closest values to a target in an ascending integer array, returning them in sorted order. Binary-search the left edge of the answer win...

Coding & Algorithms
7
0
64 people solved
May 13, 2026
Atlassian logo
Atlassian
Medium
Software Engineer

Find LCA in organization tree

Find LCA in organization tree Given an organizational hierarchy tree, return the lowest common organization (parent node) for two or more employees (≥...

Coding & AlgorithmsTreesTesting & Quality
24
1
170 people solved
Aug 4, 2025
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