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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
Meta logo
Meta
Medium
Software Engineer

Solve classic LeetCode problems

Question LeetCode 215. Kth Largest Element in an Array LeetCode 249. Group Shifted Strings Variant of LeetCode 56. Merge Intervals extended to 2-D rec...

Coding & Algorithms
9
0
60 people solved
Jul 29, 2025
Uber logo
Uber
Medium
Software Engineer

Tell about a past project and impact

Tell about a past project and impact Behavioral: Past Project Deep Dive You are in a Software Engineer onsite interview. Share a past project you led ...

Behavioral & LeadershipProject Deep DiveOwnership & Execution
17
0
155 people solved
Jul 15, 2025
Tesla logo
Tesla
Hard
Machine Learning Engineer

Design an LLM math-solving chain

Design an LLM math-solving chain Design an LLM-Based Arithmetic Solver Context You are building an LLM-driven service that answers arithmetic question...

ML System DesignLLM ApplicationsPrompt Engineering
25
0
202 people solved
Jul 26, 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
18 people solved
Aug 15, 2026
ByteDance logo
ByteDance
Easy
Data Scientist Locked

Explain Train-Test Performance Gap

This question evaluates a candidate's competency in diagnosing model generalization failures for both classical machine learning and deep learning sys...

Machine Learning
2
0
40 people solved
Feb 14, 2026
DoorDash logo
DoorDash
Medium
Data Scientist

Analyze Customer Purchase Patterns Using SQL Query

orders +----------+-------------+-------------+------------+------+ | order_id | customer_id | order_value | order_date | city | +----------+---------...

Data Manipulation (SQL/Python)
4
0
30 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Data Scientist

Determine Unhealthy Oculus Usage with SQL Analysis

oculus_sessions +---------+---------------------+---------------------+---------+------------+ | user_id | session_start | session_end |...

Data Manipulation (SQL/Python)
1
0
24 people solved
Aug 4, 2025
Startups.Com logo
Startups.Com
Medium
Machine Learning Engineer

Design efficient Transformer inference with KV cache

You are implementing autoregressive inference for a decoder-only Transformer. 1) Explain what the KV cache is, what tensors are cached per layer, and ...

ML System DesignLLM Inference & ServingTransformers & Attention
14
0
148 people solved
Mar 10, 2026
Meta logo
Meta
Medium
Data Scientist

Posts and Replies Engagement

Posts and Replies Engagement A content platform stores user-generated posts and the replies that those posts receive. You need to answer two questions...

Data Manipulation (SQL/Python)
1
0
15 people solved
Feb 1, 2026
Stripe logo
Stripe
Medium
Data Scientist

Write SQL to detect recurring non-subscription users

You have two tables: merchant and transaction. Assume 'today' is 2025-09-01. Schema: merchant(merchant_id INT PK, merchant_name TEXT, country TEXT, cr...

Data Manipulation (SQL/Python)
2
0
27 people solved
Oct 13, 2025
Apple logo
Apple
Medium
Machine Learning Engineer

Describe recent project experiences

Describe recent project experiences Behavioral: Walk Through Two Recent ML Projects Context: Technical screen for a Machine Learning Engineer. Focus o...

Behavioral & LeadershipProject Deep DiveOwnership & Execution
5
0
95 people solved
Jul 26, 2025
Atlassian logo
Atlassian
Medium
Data Scientist

Find 2023 NCAA championship winner

You are given two tables. Schema: team(team_id INT PRIMARY KEY, team_name TEXT); game(game_id INT PRIMARY KEY, team_id INT, opponent_team_id INT, date...

Data Manipulation (SQL/Python)
3
0
23 people solved
Oct 13, 2025
Adobe logo
Adobe
Medium
Software Engineer

Transform an Array into Its Next Permutation

Problem Rearrange an integer array in place into the next lexicographically greater permutation. If the array is already the greatest permutation of i...

Coding & Algorithms
1
0
30 people solved
Apr 19, 2026
Google logo
Google
Medium
Software Engineer

How do you handle conflict and ambiguity?

You are asked a series of detailed behavioral questions. Answer each with specific context, actions, and measurable outcomes. Conflict, teamwork, and ...

Behavioral & LeadershipConflict & CollaborationEthics & Responsibility
12
0
127 people solved
Feb 12, 2026
Dropbox logo
Dropbox
Medium
Software Engineer

Design file-processing API with long-running jobs

You are asked to design an HTTP-based API and high-level backend architecture for processing files in a cloud storage service (similar to a simplified...

System DesignJob Scheduling & WorkflowsAPI Design
11
0
144 people solved
Nov 1, 2025
Pinterest logo
Pinterest
Medium
Data Scientist

Find available reservation time slots

Problem You are building an API to show which time slots are available for booking at a restaurant. You are given: - The restaurant’s opening hours (p...

Coding & AlgorithmsIntervals & SchedulingSorting
18
0
144 people solved
Aug 2, 2025
C3 AI logo
C3 AI
Medium
Data Scientist

Decompress an encoded string

Decompress an encoded string Given an encoded string, return its decoded (decompressed) form. Use the following encoding rule: - A positive integer \(...

Coding & Algorithms
5
0
69 people solved
Jul 25, 2025
Capital One logo
Capital One
Hard
Data Scientist

Design and analyze a card signup A/B test

A/B Test Design: Co‑Branded Gym Credit Card Offer Context: You will A/B test a 3‑month free gym membership offer shown on the application landing page...

Analytics & ExperimentationExperiment Design (A/B Testing)Business Case Analysis
11
0
103 people solved
Oct 13, 2025
Airbnb logo
Airbnb
Medium
Software Engineer

Describe an impactful consumer project

Behavioral: End-to-End Consumer Project (Software Engineer) You are interviewing for a software engineering role focused on consumer-facing products. ...

Behavioral & LeadershipProject Deep DiveOwnership & Execution
12
0
95 people solved
Sep 6, 2025
Snapchat logo
Snapchat
Medium
Software Engineer Locked

Design a device owner lookup service

This question evaluates a candidate's understanding of system design concepts such as real-time event ingestion, handling out-of-order and duplicate e...

System DesignSystem Design FundamentalsAPI Design
6
0
99 people solved
Feb 12, 2026
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