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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
404
Companies
980
Updated
11.12.2026
404 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
Google logo
GoogleAmazonMeta

Also asked at Meta, Microsoft, Bloomberg, Goldman Sachs, Apple, Qualcomm, Nagarro

Easy
Software Engineer

Maintain LIFO Behavior Using Only FIFO Queue Operations

Problem Implement a LIFO stack using only two FIFO queues and their standard operations: push to back, peek/pop from front, size, and empty. A list or...

Coding & AlgorithmsData Structure DesignStacks & Queues
0
0
15 people solved
Attentive logo
Attentive
Medium
Software Engineer

Evaluate a Lisp-Style Prefix Expression Language With ADD, MULT and LET Variables

Implement parse(expression), which evaluates an expression in a small Lisp-style language and returns its integer value. Despite its name, the functio...

Software Engineering FundamentalsParsing & InterpretersStacks & Queues
2
0
36 people solved
Sep 24, 2026
Airbnb logo
AirbnbGoogleBloomberg
Hard
Software Engineer

Candies Reachable Through Possessed Boxes and Keys

Problem There are n labeled boxes. status[i] says whether box i is initially open; candies[i] is its candy count. After opening a possessed box, colle...

Coding & AlgorithmsGraphsSimulation & State Machines
2
0
16 people solved
Meta logo
Meta
Medium
Software Engineer

Canonicalize an Absolute Unix-Style Path With Dot and Double-Dot Segments

Given an absolute path in a Unix-style file system, return its simplified canonical form. Function Signature `python def simplify_path(path: str) -> s...

Coding & AlgorithmsStacks & QueuesArrays & Strings
5
0
49 people solved
Sep 14, 2026
Amazon logo
AmazonGoogleMetaHashedIn

Also asked at Meta, HashedIn

Hard
Software Engineer

Fewest Adjacent-or-Equal-Value Jumps to the Last Index

Problem Start at index 0. In one step, move to an in-bounds neighboring index or to any different index holding the same value. Return the minimum ste...

Coding & AlgorithmsGraphs
0
0
11 people solved
Falconx logo
Falconx
Medium
Software Engineer

Longest Single-Venue Execution Window Within Price-Range and Slippage Limits

You are building an audit module for a high-frequency trading platform. It receives trade-execution logs from several exchanges (venues) as an asynchr...

Coding & AlgorithmsTwo Pointers & Sliding WindowStacks & Queues
2
0
15 people solved
Sep 6, 2026
Google logo
GoogleMetaBloomberg
Medium
Software Engineer

Construct the Unique Maximum-Root Binary Tree

Problem Given distinct nums values, create a tree whose root is the maximum value. Its left subtree is constructed from values before that maximum, an...

Coding & AlgorithmsTreesStacks & Queues
0
0
13 people solved
Bridge logo
Bridge
Medium
Software Engineer

Normalize a file path

Given an absolute Unix-style file path as a string, return its canonical normalized form. Rules: - The input always starts with /. - A single . means ...

Coding & AlgorithmsStacks & Queues
15
0
243 people solved
Jan 27, 2026
Anthropic logo
Anthropic
Hard
Software Engineer

Convert Sampled Call Stacks into Start and End Events

Convert a sequence of sampled call stacks into inferred function start and end events. Compare adjacent stacks by their common prefix, ending frames t...

Coding & AlgorithmsStacks & QueuesArrays & Strings
8
0
85 people solved
Mar 30, 2026
Google logo
GoogleAmazonMicrosoftSprinklr

Also asked at Microsoft, Sprinklr

Medium
Software Engineer

Shortest Directed Routes With Alternating Edge Colors

Problem A directed graph on nodes 0 through n-1 has redEdges and blueEdges. Self-loops and parallel edges are allowed. For every node, return the smal...

Coding & AlgorithmsGraphsStacks & Queues
1
0
13 people solved
Reddit logo
Reddit
Medium
Software Engineer

Implement a sliding-window rate limiter

Problem Design and implement an in-memory rate limiter using a sliding time window. You are given a stream of requests. Each request has: - key (e.g.,...

Coding & AlgorithmsRate LimitingData Structure Design
27
0
306 people solved
Nov 10, 2025
Decagon logo
Decagon
Medium
Software Engineer

Compute exclusive CPU time from nested logs

You are given logs from a single-threaded CPU that runs n functions (IDs 0 to n-1). Each log entry is a string in the format: - "functionId:start:time...

Coding & AlgorithmsStacks & Queues
22
0
389 people solved
Mar 1, 2026
Google logo
GoogleMetaMicrosoft

Also asked at Microsoft, Bloomberg, Amazon

Medium
Software Engineer

Fewest Insertions When Each Opening Requires a Consecutive Closing Pair

Problem A balanced string is empty,a concatenation of balanced strings,or "("+A+"))" for balanced A. Thus each opening parenthesis must be matched by ...

Coding & AlgorithmsGreedyStacks & Queues
0
0
10 people solved
Amazon logo
AmazonBloombergGoogle

Also asked at Google, Microsoft, Meta, ByteDance, TikTok, Flipkart

Medium
Software Engineer

Measure Binary-Tree Width Including Internal Null Gaps

Problem Return the greatest width among levels of root. A level's width counts complete-tree slots from its leftmost nonnull node through its rightmos...

Coding & AlgorithmsTreesStacks & Queues
1
0
8 people solved
Databricks logo
Databricks
Medium
Software Engineer

Compute last-5-minute QPS in memory

Problem You are building a lightweight in-memory component that tracks the query load (QPS) of a service. Design a data structure with two operations:...

Coding & AlgorithmsTwo Pointers & Sliding WindowData Structure Design
11
0
219 people solved
Nov 14, 2025
Uber logo
UberTikTokGoogle

Also asked at Google, Amazon, Bloomberg, Apple, Microsoft

Medium
Software Engineer

Encode an N-ary tree as a string and decode it back to the identical tree

A rooted N-ary tree is a tree in which each node can have any number of children, kept in a fixed order. Design a string format for such trees and imp...

Software Engineering FundamentalsTreesParsing & Interpreters
1
0
21 people solved
Palantir logo
PalantirAmplitudeAtlassian

Also asked at Atlassian, Amazon, Google, Microsoft, Uber, Salesforce, IXL Learning, WeRide

Medium
Software EngineerSenior+

Simulate a Growing Snake on a Grid and Report the Score After Every Move

A snake moves on a rectangular board with height rows and width columns. Cells are written (row, col), with (0, 0) in the top-left corner. The snake s...

Coding & AlgorithmsSimulation & State MachinesStacks & Queues
2
0
41 people solved
Plaid logo
Plaid
Medium
Software Engineer

Compute discounted prices in a queue

Given an integer array prices where prices[i] is the price of the i-th item in a checkout line, apply the following rule: for each i, find the first j...

Coding & AlgorithmsStacks & Queues
39
0
568 people solved
Sep 6, 2025
Microsoft logo
Microsoft
Medium
Data Scientist

Traverse an Org Chart by Level

You are given an organization's reporting structure as a flat list of employee-manager relationships. Exactly one employee is the root (the CEO) and h...

Coding & AlgorithmsTreesStacks & Queues
27
1
243 people solved
Feb 25, 2026
Waymo logo
Waymo
Medium
Software Engineer

Find Every Island in a Grid and Measure Its Boundary with Water

You are given an m x n grid where 1 is land and 0 is water. An island is a group of land cells connected horizontally or vertically. This is a variant...

Coding & AlgorithmsGrids & Matrices
2
0
43 people solved
Apr 14, 2026
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