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376 questions collected

Amazon has 376 published OA questions on OAHelper. Most reported topics: Array, Greedy, Sorting, Hash Table, String.

Recurring Topics

  • Array
  • Greedy
  • Sorting
  • Hash Table
  • String
  • Math
  • Simulation
  • Binary Search
  • Counting
  • Prefix Sum
  • Dynamic Programming
  • Heap (Priority Queue)
  • Two Pointers
  • Sliding Window
  • Enumeration
  • Stack
  • Number Theory
  • Matrix
  • Combinatorics
  • Database
  • Binary Indexed Tree
  • Monotonic Stack
  • Breadth-First Search
  • Design
  • Graph Theory
  • Sweep Line
  • Segment Tree
  • Ordered Set
  • Bit Manipulation
  • Shortest Path
  • Tree
  • Union Find
  • String Matching
  • Queue
  • Graph
  • Depth-First Search
  • Linked List
  • Recursion
  • Game Theory
  • Merge Sort
  • Trie
  • Join
  • Aggregation
  • Rolling Hash
  • Bitmask
  • Topological Sort
  • Divide and Conquer
  • Geometry
  • Doubly-Linked List
  • Monotonic Queue
  • Union-Find
  • Group By
  • Two Heaps
  • Data Stream
  • Brute Force
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HotAug 24, 2026

amazonOA Insights - Online Assessment Pattern & Topics

376 questions collected

What to Expect

Amazon has 376 published OA questions on OAHelper. Most reported topics: Array, Greedy, Sorting, Hash Table, String.

Topics

Questions

376

Prefix Medians of an Unsorted Array

medium

Maximum Consecutive Bags Sum

hard

Minimum Conflicts in a Branch Merge

hard

Mirrored Scroll of Palindoria

medium

Minimum Maximum Parcel Load

easy

Even Out the Box Piles

easy

Sentence Improvement MCQ

medium

Tournament Power Boosters

medium

Quantum Physics Course Memory Points

easy

Binary Command Autocomplete

medium

Smallest Base Segment for Data Restoration

medium

Smallest Base Segment for Data Restoration

medium

Route 53 Active Account Unexpired Domain Report

medium

Total Votes for Female Ambassador Candidates Under 50

easy

ECS Task Termination Load

medium

Server Power Scaling

medium

MovieDB (Spring Boot): Custom Lists - Add & Remove Movies

medium

Eldoria Maze Energy Check

easy

Word Quest Clue Matching

easy

Sort the Tagged Linked List

easy

Alternating Festival Lights

medium

Maximum Performance Score

hard

Serial Numbers with Multiplicative Digit Sums

hard

API Request Throttling

medium

Lexicographic Removal Duel

hard

Minimum Operations to Process Packages

medium

Counting Good Scaled Arrays

medium

Serial Numbers with Digit Sum Condition S(k·n)=k·S(n)

hard

Kingdom of Numis - Coin Coverage Subsets

hard

E-commerce Return Routing Engine

medium

Optimal Inventory

medium

Cache Optimization Power

hard

King Leo's Magical Fruits

medium

Lexicographically Largest Subsequence

medium

Count Magical Sequences

medium

Team Issue Tracker

medium

Return Routing Engine

medium

Smart Processor Efficiency

medium

Promo Code Validator

medium

Amazon Drone Delivery Network - Minimum Travel Time

medium

Efficient Tasks

hard

Executing Processes

medium

Minimum Operations

medium

getMinUnshippedParcels

medium

Campus Placement Selection

easy

Minimum Toll Fee

medium

Rider on a Grid

medium

Good Sequences

hard

Identify Products with Price Fluctuations

easy

Secret XOR Key Recovery

hard

Longest Contiguous Subarray with Unique Bit Counts

easy

Monthly Financial Transaction Alert System

medium

Resource Locking in an m-Ary Tree

medium

Employee Sales Performance Analysis

medium

Highest Departmental Salary

medium

Mystical Maze

medium

Alternating Pattern with Segment Reversals

hard

Sorted Tagged Linked List

easy

Code Question 2

medium

Clear the Package Queue

medium

Inventory Allocation Priority Algorithm

medium

Count Distinct Colorings

medium

Domino Coloring in Warehouse Automation

medium

Colouring a Domino Tiling

medium

Warehouse Automation Domino Coloring

medium

Minimum Product Redistribution Cost

medium

MovieDB(MERN): Actor Follow & Notification System

hard

Amazon Cloud Fleet - Smallest Total Boost for Non-decreasing Capacity

medium

Category Browse Engine

medium

Minimum Redistribution Cost

hard

Return Routing

medium

Allocate Limited Inventory Items

easy

Return Routing Engine

medium

MovieDB Watchlist

medium

Question 1

medium

Code Question 2

medium

Maximize Perfect Slots

hard

Warehouse Robotics System

medium

AWS Scalable Systems

medium

Warehouse Robotics System Stability

medium

Maximize Delivery Route Efficiency Rating

hard

Flash Sale Revenue Maximization

medium

MovieDB(MERN): Actor Follow & Notification System

medium

Array Generator Service

medium

Amazon Drone Delivery Network

medium

Student Backlogs

easy

Amazon Marketplace Seller Performance: June 2022

easy

Amazon SQL Assessment Questions

medium

Spoiled Shipments

medium

Code Question 2

hard

Maximum Efficiency Rating

medium

Code Question 2

medium

Maximum performanceScore

hard

Code Question 2

medium

Code Question 1

medium

Code Question 2

hard

Server Redirection Bug

hard

Code Question 1

medium

Maximum and Minimum Median

medium

Code Question 2

medium

Code Question 1

medium

Maximum Performance Score

easy

Code Question 1

medium

Find Smallest Key

medium

Total Response Time

medium

Assuredly Compromised Accounts

medium

Total Response Time with Throttling Mechanism

medium

Code Question 2

hard

Computer Science MCQ Set: Algorithms, Data Structures, and Systems

medium

Linux Administration and Programming Logic MCQ Set

medium

Software Engineering and Networking MCQ Assessment

easy

Customer Purchase Data

easy

SQL and Database Management Systems MCQ Set

medium

findBreachedEmployees

medium

Code Question 2

hard

Code Question 1: Maximum and Minimum Medians

easy

Code Question 1

easy

Code Question 2

hard

Minimum Number of Security Groups

medium

Fixing a Request Redirection Bug

medium

Maximize Equal Parts in String Prefixes

medium

Balanced Security Groups

medium

Code Question 1

medium

Code Question 2

medium

Server Redirection Bug

hard

Amazon Order Delays

medium

Amazon Souvenir Shop

medium

Scaling Server Powers

medium

Amazon Warehouse Robotics System

medium

Calculate Max Distance

medium

Code Question 2: OptiResource Kit

medium

Task Termination Sweep

easy

Find Longest Image

hard

Code Question 1

medium

Minimize Total Expense with OptiBatch Kit

medium

Sort Bug Report Frequencies

easy

Clean String

easy

Consonant Vowel Merge

easy

Count Wrapped Items

easy

Competitor Comparative Score

hard

Lexicographically Maximum Final Sequence

medium

Code Question 2

hard

Coding Problem

medium

Question 2

easy

Minimum Meeting Rooms

medium

DNA Sequencing

hard

Path Problem

hard

Code Question 2

hard

Maximum and Minimum Median of Subsequences

easy

Code Question 1

medium

Optimize Reserved Concurrency

medium

Find Breached Employees

medium

Total Response Time

medium

Optimize Reserved Concurrency

medium

Restore Warehouse Stock Levels

hard

Maximum Protected Population

medium

API Request Throttling

medium

Optimize Data Packet Segmentation

medium

Maximum and Minimum Median of Subsequences

medium

Data Streaming Service Stability

medium

Minimum Changes for Equal Subarray Sums

medium

Optimize Reserved Concurrency

hard

Optimal Data Encryption

easy

HTTP Request Redirection

hard

Relocate Security Units for Maximum Protection

medium

Optimize Data Packet Segmentation

medium

Optimize Reserved Concurrency

medium

Valid Server Identifiers

medium

Code Question 1

medium

Longest Arithmetic Subarray With One Change

hard

Smart Cities Security Units

medium

Lexicographically Maximal Transformation

medium

Maximize Median with Operations

medium

Frequent Updates and Computations

medium

Maximize Revenue from Flash Sale

hard

Optimize Reserved Concurrency

medium

Productive Team of Four Workers

hard

Minimum Project Completion Time

medium

Stock Market Prediction

medium

Minimize Maximum Project Time

hard

Maximize Total Revenue

medium

Sort Products with k-Distance Swaps

medium

Maximum System Memory Capacity

easy

Maximum Subscription Cost

medium

Minimum Security Groups

medium

Infection Sequences

hard

Maximum Distinct Elements

medium

Time Complexity of Sort Function

easy

Question 14

easy

Question 14

easy

Question 1

medium

Minimum Operations to Sort Products

medium

Code Question 1

easy

Maximum Affinity

medium

Maximum Subscription Cost

medium

Subsequence Medians

medium

Maximize Server Health

medium

Lexicographically Maximum Final Sequence

medium

Determine Stability Risk

medium

Robo Race

medium

Safe Devices

easy

Find Maximum Performance Score

hard

Maximum Performance Score

hard

Maximum Performance Score

medium

Website Usage Analysis

medium

Unpurchased Categories

medium

Code Question 2

medium

Minimum Delivery Time

medium

Fulfillment Center Order Processing

medium

Subsequence Medians

easy

Medians

easy

Smart Cities Security Units Relocation

medium

Lexicographically Maximum Array Result

medium

Maximum and Minimum Median of Subsequences

easy

Minimize Order Processing Time

medium

Move Units

medium

Minimum Modifications for Stable Network Node

medium

Total Distinct Differences

hard

Packing Efficiency

hard

Minimum Shipments

easy

Aggregate Packing Efficiency

hard

System Stabilization Time

easy

Total Packing Efficiency

hard

Calculate Optimal Bandwidth

hard

Determine Max DataFlow

hard

Minimum Shipments

medium

Optimal Bandwidth

hard

Get Max Health

medium

Minimum Adjustments for Optimal Binary Stream

medium

Find Number of Retailers

medium

Maximum Total DataFlow

hard

Minimum Package Processing Operations

medium

Total Packing Efficiency

medium

Code Question 1

medium

Collect The Coins

hard

Modified Knapsack Problem

easy

Code Question 1

easy

Query Process Activity

hard

Lexicographically Smallest Sequence

hard

Code Question 2

medium

Maximum System Memory Capacity

medium

Find Minimum Sum

medium

Minimize Cleaning Cost

medium

determineMaxDataFlow

hard

Maximum Data Flow

hard

Minimum Operations to Process Packages

easy

Lexicographical String Game

medium

Minimum Operations to Dispatch Items

easy

Total Packing Efficiency

hard

Number of Retailers Covering a Point

medium

Distinct Stock Profit Pairs

easy

Code Question 1

easy

Code Question 2

hard

Medians

medium

Minimum Classes for Skill Grouping

easy

First Unique Character in a String

easy

Group Students

easy

Maximum Final Element

medium

Merge Overlapping Times

medium

First Unique Character

easy

Minimum Storage Capacity

medium

Minimum Swaps to Satisfy File Affinities

hard

Maximum Storage Efficiency

medium

Medians of Subsequences

easy

Maximum Storage Efficiency

medium

Determine Minimum Storage

medium

Maximum Performance with Limited Expense

medium

Code Question 1

medium

Maximize Hardware Performance

medium

Determine Minimum Facilities

medium

Maximize Storage Efficiency

medium

Code Question 1

medium

Minimum Removals to Stay within Budget

hard

Minimum Unique Processing Facilities

medium

Retrieve Missing Data

medium

Minimum Drone Delivery Time

medium

Minimum Errors in Binary String

medium

Lexicographically Smallest Sequence

medium

Retrieve Missing Data

easy

Minimum Delivery Time

hard

Subsequence Medians

easy

Retrieve Data

hard

Maximize Storage Efficiency

medium

Code Question 2

medium

Calculate Max Distance

medium

Drone Delivery Minimum Time

medium

Optimize Inventory Shipments

medium

Process Performance Queries

hard

Minimum Cost to Convert Products

medium

Get Subarray Median

hard

Retrieve Data

medium

Maximize Product Operations

easy

Missing Digits Reconstruction

medium

Permutation Sorter

medium

Longest Regex Match Substring

medium

Minimize Cleaning Cost

medium

Longest Wildcard Match

easy

Minimize Cleaning Cost

medium

Maximum Isolation

medium

Subarray Median Count

hard

Recover the Lost Record

medium

Retrieve Data

medium

Medians

easy

countLowerValueItems

medium

Missing Digits in Configuration

hard

Maximize Dispatch Credits

hard

Minimum Additions for Range Coverage

hard

Cake Factory

medium

Kill the Enemy

easy

Notepad Editor

medium

Alien invasion

medium

Stacking Money

medium

Covid - 20

medium

Code Question 2

medium

Mathematics and Machine Learning Fundamentals

medium

Star Removal

medium

WI-FI Router Installation

medium

Minimize Grid Inconvenience

hard

Code Question 1

hard

Maximum Lucky Number

medium

Calculate Minimum Cost

medium

Calculate Pending Orders

medium

Fruit Crush

medium

Word Conjugates

medium

Minimize Cleaning Cost

easy

Processor Power Matching

medium

Word Conjugates

medium

Maximize Unique Remainders in Hash Array

easy

Longest Substring Matching Regex Pattern

medium

missingDigits

hard

Minimum Even-Length Subsegments

medium

Median of Subarray Uniqueness

hard

Security Code Transformation

medium

Maximize Optional Tasks

easy

Maximum Pages Before Suspension

medium

Vulnerability Factor

hard

Process Synchronization

medium

Maximum Valid Pairs

easy

Maximum Reward Points

easy

Calculate Repetitiveness Feature

medium

Code Question 1

easy

Use Minimum Tokens

medium

Maximum System Memory Capacity

easy

Code Question 1

medium

Find Longest Regex

hard

Minimum Operations to Adjust Prices

medium

Slot Machine 2.0

easy

Well-Organized Course Structures

medium

Well-Organized Course Structures

medium

Well-Organized Course Structures

medium

```html Course Structure Analysis body { f...

medium

Similar Substrings in Reviews

medium

Maximum Sum Compression Utility

medium

Minimum Health Required to Win the Game

easy

CodeCrafters

medium

Longest Self-Sufficient Proper Substring

medium

Maximize System Throughput

easy

Pascal Triangle Encryption

medium

Database Query Optimization

medium

Digit Collapse Cipher

medium

Amazon Eco-Friendly Product Ratings

medium

Sports Analytics

easy

Tiling Cost

easy

Minimum XOR Operations to Zero

hard

Data Dependency Sum

medium

Mean Rank Subarray Count

medium

Sales Pattern Analysis

medium

Amazon Subsequence Prices

medium

EffiBin Kit Optimization

medium

Amazon Financial Optimization Tool

medium

AWS Array Outlier Detection

medium

Amazon Real Estate Analytics - Building Height Variance Problem

medium

Minimum Delivery Grid Path

medium

Balanced Bracket Splits

medium

GCD Array Transformation Sum

medium

Minimum Network Lag Optimization

easy
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