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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
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
Data Scientist

Determine High-Quality Notifications with CTR Analysis

Determine High-Quality Notifications with CTR Analysis Push Notification Quality: Metric, Baseline Assessment, and Experiment Design Background A mobi...

Analytics & Experimentation
7
0
55 people solved
Aug 4, 2025
J.P. Morgan logo
J.P. Morgan
Medium
Data Scientist Locked

Explain C++ virtual dispatch and object lifetime

This question evaluates a candidate's understanding of C++ virtual function dispatch, destructor and object lifetime semantics, stack versus heap allo...

Software Engineering Fundamentals
4
0
65 people solved
Jan 22, 2026
Adobe logo
Adobe
Medium
Software Engineer

Persist with an Initiative Others Doubt

Question Tell me about an initiative you continued to advocate for even though others initially doubted it. How did you test your belief, earn support...

Behavioral & Leadership
1
0
14 people solved
Apr 19, 2026
Uber logo
Uber
Medium
Data ScientistNew Grad Locked

Should Uber double member discounts?

This question evaluates competency in causal inference, experimental design, statistical power and sample-size analysis, metric definition, and two-si...

Statistics & MathExperiment Design (A/B Testing)Experiment Analysis & Readout
21
0
157 people solved
Apr 6, 2026
PayPal logo
PayPal
Medium
Data Scientist

Write conditional aggregation SQL queries

Question Write an SQL query to compute the total amount for rows satisfying a condition, comparing approaches that use SUM(CASE WHEN … THEN … END) ver...

Data Manipulation (SQL/Python)
1
0
20 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Data Scientist

Calculate Expected Comments and Confidence Interval Analysis

Calculate Expected Comments and Confidence Interval Analysis Scenario You are analyzing the distribution of comment counts per post for a social platf...

Statistics & Math
4
0
35 people solved
Aug 4, 2025
Amazon logo
Amazon
Medium
Software Engineer

Implement tree left/right views via BFS and DFS

Given a binary tree, output the left view and right view: for each depth, the first node visible from the left and the first node visible from the rig...

Coding & Algorithms
3
0
54 people solved
Aug 13, 2025
Wells Fargo logo
Wells Fargo
Medium
Data Scientist

Write SQL for rolling default rates

Write a SQL query to compute 12‑month rolling default rates by customer segment. Assume table loans(month DATE, segment TEXT, defaults INT, accounts I...

Data Manipulation (SQL/Python)
2
0
35 people solved
Jul 26, 2025
Uber logo
Uber
Hard
Data Scientist

Design an ETA experiment under interference

Experiment Design: Estimating Causal Impact of a New Rider ETA Model in a Two-Sided Marketplace Context You are testing a new rider ETA model that cha...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference
18
0
156 people solved
Oct 13, 2025
Grayswan Ai logo
Grayswan Ai
Easy
Software Engineer Locked

Implement a debounced function (with leading option)

This question evaluates mastery of debouncing patterns, timer-based asynchronous control, closures, and preservation of function context and arguments...

Coding & Algorithms
3
0
39 people solved
Jan 22, 2026
Lyft logo
Lyft
Easy
Software Engineer

Validate a Binary Search Tree Iteratively

Problem Determine whether a binary tree is a valid binary search tree. Every value in a node's entire left subtree must be smaller than the node value...

Coding & Algorithms
2
1
45 people solved
Apr 14, 2026
Databricks logo
Databricks
Medium
Machine Learning EngineerSenior+ Locked

Implement Gradient Descent Regression

This question evaluates understanding of linear regression and gradient-based optimization, including loss formulation, gradient derivation, parameter...

Machine Learning
4
0
78 people solved
Feb 7, 2026
Uber logo
Uber
Hard
Software Engineer Locked

Find robots matching obstacle-distance signature

This question evaluates spatial reasoning on 2D grids, the ability to compute distance signatures to nearest obstacles, and careful handling of bounda...

Coding & AlgorithmsGrids & Matrices
10
0
159 people solved
Jan 20, 2026
Medium
Software Engineer Locked

Return the k-th row of Pascal-like triangle

This question evaluates combinatorics, array manipulation, and space-efficient algorithm design by requiring computation of a specific row of Pascal’s...

Coding & Algorithms
4
0
41 people solved
Jan 21, 2026
Meta logo
Meta
Hard
Data Scientist

Persuade engineers to launch pinned-unread chats

Pitch: Pinning Conversations for High-Unread Users Context You are proposing a feature that pins a small set of conversations to the top of the inbox ...

Behavioral & Leadership
5
0
63 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Software EngineerSenior+

Design a content processing service

System Design: High-Throughput Content Processing Service Context Design a content processing and moderation service for a large-scale media app. Cont...

System Design
5
0
58 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Data Scientist

Determine Maximum Path Length in Directed Acyclic Graph

Scenario A backend service represents task dependencies as a directed graph; you need to understand how deep the longest dependency chain can get. Que...

Coding & Algorithms
23
0
97 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Software Engineer

Compare two string linked lists

Question Given two singly linked lists where each node stores one character as a string, determine whether the sequences of characters represented by ...

Coding & Algorithms
8
0
33 people solved
Jul 29, 2025
SoFi logo
SoFi
Hard
Data Scientist

Plan and validate ranking experiment

Evaluate a New Home-Page Ranking Algorithm: 3-Stage Plan Context You are introducing a new ranking algorithm for the home page. You must validate it s...

Analytics & ExperimentationExperiment Design (A/B Testing)Ranking Models
13
0
91 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

How should you evaluate unconnected content?

A social media platform has launched a feed feature that increases the share of unconnected content, meaning posts from creators who do not have an ex...

Analytics & ExperimentationExperiment Analysis & ReadoutMetrics & KPIs
15
0
157 people solved
Apr 5, 2026
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