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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
1.5k
Companies
980
Updated
11.12.2026
1.5k 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
Confluent logo
Confluent
Medium
Software Engineer

Implement tail N lines

Question Implement a utility tail(path: string, N: int) (and an equivalent stream variant) that prints the last N lines of input without loading the w...

Coding & AlgorithmsData Structure DesignOperating Systems
79
0
554 people solved
Sep 6, 2025
Figma logo
Figma
Easy
Software Engineer Locked

Implement Memory-Efficient Document Undo/Redo

This question evaluates data structure design and algorithmic reasoning for implementing memory-efficient undo/redo semantics on a key-value document,...

Coding & AlgorithmsData Structure DesignArrays & Strings
26
0
199 people solved
Jan 12, 2026
Bloomberg logo
BloombergGoogle
Medium
Software Engineer

Remove Both Extremes by Trimming Ends

Problem You are given an array nums of distinct integers. In one deletion, remove either the current first entry or the current last entry. Return the...

Coding & AlgorithmsArrays & StringsGreedy
0
0
9 people solved
Tesla logo
Tesla
Hard
Machine Learning Engineer

Compute suffix sums over waypoints

Problem You are given a batch of 2D waypoint trajectories. - Input: points with shape [B, N, 2], where points[b][i] = (x, y) is the i-th waypoint for ...

Coding & AlgorithmsArrays & Strings
11
0
203 people solved
Feb 12, 2026
Amazon logo
AmazonGoogle
Medium
Software Engineer

Maximum Subarray Sum in Repeated Copies

Problem Concatenate k copies of arr and find the largest contiguous-subarray sum. The empty subarray is allowed and has sum 0. Return the maximum sum ...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
1
0
9 people solved
Apple logo
Apple
Easy
Data Engineer

Implement most_frequent_key without using max()

Problem (Python OOP) You are given two classes. Parent precomputes frequency counts of items (as strings) from an input list. `python class Parent: ...

Coding & AlgorithmsArrays & StringsProgramming Languages
18
0
153 people solved
Nov 16, 2025
Snowflake logo
Snowflake
Medium
Software Engineer

Set second tree values by subtree sums

Given the roots of two complete binary trees T1 and T2 that have identical structure and the same number of nodes, replace each value in T2 with the s...

Coding & AlgorithmsTrees
20
1
159 people solved
Sep 6, 2025
Google logo
GoogleAmazonMeta
Hard
Software Engineer

Sum the Block Lengths That Permit Sorting by Rotation

Sum the Block Lengths That Permit Sorting by Rotation You are given an integer array nums of length n. A positive integer k is valid if k divides n an...

Coding & AlgorithmsArrays & StringsMath & Number Theory
0
0
7 people solved
Goldman Sachs logo
Goldman Sachs
Medium
Software Engineer Locked

Return the First Non-Repeating Character

Return the first character whose total frequency is one, preserving input order and defining the result when every character repeats.

Coding & AlgorithmsArrays & Strings
14
0
104 people solved
Sep 1, 2026
Amazon logo
AmazonGoogleBloomberg

Also asked at Bloomberg, Meta, Microsoft

Medium
Software Engineer

Count Subarrays with at Least k Occurrences of the Global Maximum

Count Subarrays with at Least k Occurrences of the Global Maximum You are given an integer array nums and a positive integer k. Let M be the maximum v...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
0
0
11 people solved
Upstart logo
Upstart
Medium
Software Engineer

Decrypt a twice-encrypted message using known pairs

Three people pass notes A → B → C → A. Notes are encrypted using a character-substitution cipher (a one-to-one mapping per character). You are given t...

Coding & AlgorithmsCryptographyArrays & Strings
9
0
166 people solved
Mar 9, 2026
Databricks logo
Databricks
Medium
Machine Learning EngineerSenior+ Locked

Delete a Character From Cover

This question evaluates proficiency in string manipulation, interval arithmetic, and data-structure updates with attention to index mapping and edge-c...

Coding & AlgorithmsArrays & StringsIntervals & Scheduling
18
0
133 people solved
Feb 7, 2026
Google logo
GoogleBloomberg
Easy
Software Engineer

First Index Equal to Its Value's Digit Sum

First Index Equal to Its Value's Digit Sum You are given an integer array nums, indexed from zero. Return the smallest index i for which the sum of th...

Coding & AlgorithmsArrays & StringsMath & Number Theory
0
0
4 people solved
Google logo
Google
Medium
Software Engineer Locked

Find a Horizontal Cut That Bisects Rectangle Area

Solve a computational-geometry problem that asks for the horizontal line dividing the combined area of many disjoint rectangles in half. The exercise ...

Coding & AlgorithmsBinary SearchMath & Number Theory
28
2
220 people solved
Jun 4, 2026
Box logo
Box
Medium
Software Engineer

Compute Top-K word frequencies under a path

Compute Top-K word frequencies under a path Given a filesystem path that may contain nested subdirectories and files, compute the top K most frequent ...

Coding & AlgorithmsHeaps & Priority QueuesBatch & Stream Processing
38
0
266 people solved
Aug 1, 2025
Google logo
Google
Medium
Machine Learning Engineer Locked

Implement substring search and weighted sampling

This question evaluates algorithm design and analysis skills across string processing (efficient substring search) and randomized/data-structure techn...

Coding & AlgorithmsString AlgorithmsMath & Number Theory
22
0
198 people solved
Mar 30, 2026
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Find First Prefix-Matching Word

This question evaluates proficiency in string processing and prefix-matching within arrays, testing the ability to identify the first occurrence and h...

Coding & AlgorithmsArrays & Strings
15
0
126 people solved
Feb 24, 2026
Google logo
GoogleAmazonMetaBloomberg

Also asked at Meta, Bloomberg

Medium
Software Engineer

Find the First Query Prefix That Can Make an Array Zero

Find the First Query Prefix That Can Make an Array Zero Problem You are given a nonnegative integer array nums and a list of queries. Query [l, r, val...

Coding & AlgorithmsBinary SearchArrays & Strings
1
0
9 people solved
Figma logo
Figma
Medium
Data Engineer

Validate an IPv4 address string

Given a string s, determine whether it is a valid IPv4 address. A valid IPv4 address: - Has exactly 4 parts separated by dots (.): x1.x2.x3.x4 - Each ...

Coding & AlgorithmsArrays & Strings
23
0
263 people solved
Jan 20, 2026
Meta logo
Meta
Medium
Software EngineerSenior+

Longest Balanced Substring in a String of Parentheses

Reported from a Meta software engineering coding round. You are given a string s that contains only the characters ( and ). A string is balanced if it...

Coding & AlgorithmsStacks & QueuesDynamic Programming
1
0
14 people solved
Mar 26, 2026
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