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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
18.6k
Companies
980
Updated
11.12.2026
18.6k Questions 980 Companies11.12.2026
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
DoorDash logo
DoorDash
Medium
Software Engineer

Dasher Daily Pay from Order Events with Double Rate in Peak Windows

A Dasher (a delivery driver) is paid for the time spent delivering orders. You are given the order events for one Dasher's day. At any moment, the act...

Coding & AlgorithmsIntervals & Scheduling
26
2
252 people solved
Sep 23, 2026
Google logo
GoogleAmazonMicrosoft

Also asked at Microsoft, Meta, Bloomberg, TikTok, Goldman Sachs, Oracle, Zoho, Mastercard, TCS, Adobe, IBM, Infosys, Huawei

Hard
Software Engineer

List All Nonattacking Queen Boards

Problem Place n queens on an n by n chessboard so that no pair shares a row, column, or diagonal. Return every distinct valid board, without repeated ...

Coding & AlgorithmsBacktracking & RecursionGrids & Matrices
4
0
30 people solved
Google logo
GoogleAmazonMeta

Also asked at Meta, Microsoft, Bloomberg, Jump Trading

Hard
Software Engineer

Select a Permutation by Its Lexicographic Rank

Problem List the permutations of the digits 1 through n in increasing lexicographic order. Return the permutation at the one-based position k, as a st...

Coding & AlgorithmsMath & Number Theory
3
0
32 people solved
eBay logo
eBay
Medium
Machine Learning Engineer

Count Staircases Built from n Blocks with Strictly Increasing Step Heights

You have n identical unit blocks. A staircase is a row of one or more steps, each step a column of blocks, where every step has a positive height and ...

Coding & AlgorithmsDynamic ProgrammingMath & Number Theory
2
0
18 people solved
Oct 24, 2026
Mercor logo
Mercor
Hard
Software Engineer

Sort With a 90%-Accurate Paid Comparator: Algorithm, Accuracy and Cost

You are given a set of n objects that must be sorted by an underlying value you cannot read directly. The only way to learn anything about the values ...

Statistics & MathSortingProbability
22
0
204 people solved
Sep 12, 2026
Google logo
GoogleAmazonMicrosoft

Also asked at Microsoft, Bloomberg, Meta, Goldman Sachs, TCS, Flipkart, EPAM Systems, TikTok, Zoho, NVIDIA, Visa, Razorpay, Akamai

Medium
Software Engineer

Count Right-and-Down Grid Routes

Problem A rectangular grid contains row_count rows and column_count columns. Starting in its upper-left cell, count the routes that finish in its lowe...

Coding & AlgorithmsDynamic ProgrammingGrids & Matrices
3
0
31 people solved
OpenAI logo
OpenAI
Medium
Applied Scientist

Extensible card-hand ranking: three of a kind, flush, pair and a discard rule

Build a small card game in code. Each player holds a hand of cards; the program ranks the hands, decides the outcome, and returns a log of the whole p...

Software Engineering FundamentalsLow-Level Design (OOP)
12
0
116 people solved
Sep 17, 2026
Squarepoint logo
SquarepointWalmart LabsPalo Alto Networks
Medium
Software Engineer

Reorder One Array to Win as Many Position Comparisons as Possible

Problem Rearrange nums1 to maximize the number of indices i where the rearranged value is strictly greater than nums2[i]. Return any maximizing permut...

Coding & AlgorithmsGreedySorting
5
1
60 people solved
Glean logo
Glean
Medium
Software EngineerIntern

Shortest Manhattan Distance Between Any X and Any Y in a String or Grid

The interview had two parts. The first gave a string such as "XOXOXXOOYOXO" and asked for the shortest distance between any X and any Y (here 2). The ...

Coding & AlgorithmsGrids & Matrices
5
0
61 people solved
Sep 30, 2026
Oracle logo
Oracle
Medium
Software Engineer

Remove parentheses from a plus/minus expression by propagating signs

You are given an algebraic expression made of single-letter variables, the operators + and -, and parentheses. Simplify it by removing every pair of p...

Coding & AlgorithmsParsing & InterpretersStacks & Queues
1
0
15 people solved
Oct 29, 2026
Google logo
GoogleMetaBloomberg

Also asked at Bloomberg, Amazon, Microsoft, Oracle, Josh Technology

Medium
Software Engineer

Flatten Existing Tree Nodes into a Preorder Right Chain

Problem Flatten a binary tree into its preorder node sequence using the same existing TreeNode objects. After the call, every left pointer must be nul...

Coding & AlgorithmsTrees
4
0
33 people solved
Reducto logo
Reducto
Medium
Software Engineer

Group Document Bounding Boxes into Indentation Levels with a 0.01 Left Tolerance

A document parser returns the text blocks of a document as bounding boxes, listed from top to bottom. Each box has left, top, width, height and page f...

Coding & AlgorithmsSorting
4
0
44 people solved
Oct 13, 2026
Google logo
Google
Medium
Software Engineer

Detect timed-out RPC calls from paired start and end log records

A service writes a log record when a remote procedure call (RPC) starts and another when it ends. Given the log, in time order, and a timeout, report ...

Coding & AlgorithmsArrays & Strings
22
1
227 people solved
Sep 21, 2026
Capital One logo
Capital One
Medium
Software EngineerSenior+ Locked

Analyze and Debug Virtual-Card Payment Rules

Analyze virtual-card benefits and challenges, explain payment-rule decisions, and debug Boolean logic, threshold boundaries, and decimal digit parsing...

Software Engineering FundamentalsPayments & LedgersDebugging
50
0
486 people solved
Aug 23, 2026
Nooks logo
Nooks
Medium
Software Engineer

Merge Call-Recording Labels from Multiple Labelers by Majority Vote

A team labels phone-call recordings. Every recording is exactly 100 seconds long, and each of N labelers has independently split the same recording in...

Coding & AlgorithmsIntervals & Scheduling
3
0
27 people solved
Oct 15, 2026
Tower logo
Tower
Medium
Quantitative ResearcherIntern

Bound a Third Correlation from Two Known Correlations

Three random variables have finite, positive variances. Their Pearson correlations satisfy corr(X1,X2) = 0.5 and corr(X2,X3) = 0.5. Determine the full...

Statistics & MathProbability
2
0
15 people solved
Oct 24, 2026
Atlassian logo
Atlassian
Medium
Software Engineer

Shortest Selection Walk on the Alphabet Board

Problem Start at a on the board with rows abcde, fghij, klmno, pqrst, uvwxy, z. U,D,L,R move one cell in the indicated direction only when that cell e...

Coding & AlgorithmsGrids & MatricesGreedy
7
0
58 people solved
OpenAI logo
OpenAI
Hard
Data Scientist

Evaluating a Frontier AI Model's Safety for a Government in a 30-Day Pre-Launch Window

You work for a government agency. An AI developer gives your agency access to each new model 30 days before the model's public launch. How would you e...

Machine LearningAI Safety & AlignmentLLM Evaluation
0
0
5 people solved
Nov 6, 2026
Google logo
Google
Medium
Software Engineer

Technical Project Deep Dive: Root Cause, Trade-offs, Design Doc Buy-in and Results

Walk the interviewer through a technical project you drove that shipped to production, for example a design that reduced a system's latency. Although ...

Behavioral & LeadershipProject Deep DiveLeadership & Influence
1
0
17 people solved
Oct 29, 2026
eBay logo
eBay
Easy
Software Engineer

Model Hierarchical Permissions as Classes and Match Them with Breadth-First Search

Design a small set of classes that represent hierarchical permissions, then write the logic that decides whether a given permission is granted by sear...

Software Engineering FundamentalsGraphsAuthentication & Authorization
1
0
15 people solved
Oct 28, 2026
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