Amazon OA Questions 2020: What Candidates Actually Saw
Last updated: May 2026
203+ Amazon online assessment questions reported by candidates who took the OA in 2020. Sourced from 1Point3Acres, LeetCode, Blind, Glassdoor, and Reddit. Data grows as new reports are added.
Amazon OA Format in 2020
The Amazon online assessment has followed a consistent format across multiple hiring cycles. Based on 2020 reports in the database, candidates typically see 2 to 3 algorithmic coding problems delivered through a proctored online platform (most commonly HackerRank). Some roles include additional behavioral or work-simulation components after the coding section.
Time limits reported by candidates range from 70 to 110 minutes for the full assessment. The coding problems are auto-graded, so edge case handling and runtime efficiency both matter. Partial credit is available on some platforms if your solution passes a subset of test cases.
Real Amazon OA Questions from 2020
Amazon Online Assessment
``` codeList, a list of lists of strings representing the order and grouping of specific fruits that must be purchased in order to win the prize for the day....
Amazon | OA
Here is the problem: https://aonecode.com/Amazon-Online-Assessment-Minimum-Total-Container-Size My intuition is to use dp and the bottom-up approach that I came up with is to have dp[m][n] = answer for subarray from index 0...m...
Amazon SDE OA
You are given a grid of size (m, n) where each (i, j) is the cost of unlocking door (i, j). You are given a starting position (sx, sy). And you...
[NDA] Amazon | SDE2 | Seattle | May 2020 [Reject]
Recruiter reached out to me on LinkedIn and sent me an Online Assessment the next day. After submitting the OA, the recruiter reached out for Virtual Onsite after 4 weeks....
Amazon | SDE2 | Bay Area | May 2020 [Reject]
Role: SDE Question: Cannot discuss the exact questions due to NDA Rounds: 1 OA, 1 Tech Phone Screen and 4 back to back rounds on virtual onsite Round 1: 50% LP from the...
Amazon | SDE1 | India | Offer
Status: 2.5 YOE at a service based company in India Date: Nov 2020 How I applied: Messaged a recruiter on LinkedIn. Online assessment on hackerrank (120 + 15 mins): \thttps://leetcode.com/problems/reorder-data-in-log-files/ A BFS based...
Amazon | SDE2 | Seattle [Offer]
Yet another Amazon job post cliche but I\'ll still say it. But before that - Thank you @LeetCode and Leetcode community for providing a valuable platform for developers to learn...
Amazon Technical phone interview
I got contacted for the position via LinkedIn through an Amazon recruiter. He asked me to send ahead my resume if I am interested along with a few lines about...
Amazon SDEii interview
OA : Related to Critical Connections Number of Islands Telephonic : LP Questions Serialize and Deserialize a Binary tree Virtual Onsite : Round 1 - LP questions(20 mins) and one medium leetcode question Round 2 - LP...
Amazon Virtual Onsite - FrontEnd Engineer II Offer
First even FAANG interview (always thought I would never do well so never really bothered), I have a CS background for my undergrad and then did Biomedical for my masters...
Amazon SDE II [Offer]
First I would like to thank the Leetcode community for the amazing help and support. I prepared for whole 2 months sincerely without much distraction. I had 5 rounds in...
Amazon swe interview Offer
Skipped OA and did onsite. Round 1: Parking lot variation questions( I think I did ok but got a few hints ) Round 2: Guess the word variation ( I banged it...
Amazon telephone screen experience
I am an experienced Software Engineer with 4 years of experience. I was sent an OA from Amazon but I could not take it. HR was kind enough to schedule...
Amazon SDE 2 (Rejected)
Hi all, I just finished interviewing for the second time for the SDE 2 role at Amazon and wanted to share some thoughts on the process. Background: For this role, I...
Amazon OA Suggest approach
2)Check if a given list contains all the values of other list in the same sequence. The question was a shopping list has items and one other coupon List<List<>> of...
Amazon Virtual Interview Experience July 2020
I applied for Amazoz with 8+ YOE in development but currently working as a Technical lead with 30-40% of my time going into coding and rest on architect level and...
AMAZON JULY-2020 REJECTED -- NDA --SDE II
First time with FAANG. I applied for Amazoz with 6+ YOE. Passed the OA in June Mid .The onsite interview happened in July mid. 4 months hard work with leetcode, system designs...
Amazon Virtual Onsite in June - NDA (Rejected)
Two decades of experience, cleared 200 LC questions before the on-site, AWS certified. Online Assessment + Phone Screen back in April, Virtual On Site in June Lessons Learnt: 1. 4 rounds of algorithms...
Amazon Cloud Support Associate online assessment (Taiwan)
Actually I\'m not major in cloud computing or network, instead more interested in machine learning. I just send the application for the role in case it\'s an oppurtunity to get...
Amazon | OA | Binary Tree creation and finding LCA
Given array of numbers. Create Binary Search Tree in the order of given array numbers. After creation of tree input will have 2 values, you were supposed to give LCA value...
Topic Breakdown (2020 OA)
Topics reported by candidates who took the Amazon OA in 2020:
Difficulty Breakdown (2020 OA)
107
easy
10
medium
10
hard
Difficulty labels are reported by candidates or inferred from LeetCode ratings.
How to Prepare for the Amazon OA
The Amazon OA is a timed, auto-graded coding test. Preparation is different from interview prep: you need to optimize for both correctness and speed, since partial credit requires passing test cases, not just showing reasoning.
- Practice timed sessions. Set a timer for 35 to 45 minutes per problem and simulate the real constraint.
- Focus on the topic clusters that appear most in Amazon OA reports: dynamic programming, graphs, arrays, and strings make up the majority of reported problems.
- Read the problem constraints carefully before writing code. The constraints often reveal the expected time complexity and algorithm type.
- Use the LeakCode database to review 2020 OA questions from actual candidates. Pattern recognition across multiple sightings is a stronger prep signal than any single mock problem.
- If the OA includes a work simulation section, practice under realistic conditions. This section tests judgment and values alignment, not coding ability.
FAQ
What does the Amazon OA look like in 2020?
Based on 2020 candidate reports, the Amazon OA typically includes 2 to 3 coding problems and runs 70 to 110 minutes. Topics lean toward dynamic programming, graphs, arrays, and strings. Some roles include a work simulation section after the coding component.
How long is the Amazon OA?
Most candidates report 70 to 90 minutes for the coding component. Roles with additional work simulation sections extend the total time to 110 to 150 minutes. Check your invitation email for the exact time allocation for your specific role.
What platform does Amazon use for the OA?
Amazon uses HackerRank or its own proprietary platform depending on the role and hiring cycle. Your invitation will specify the platform. Both platforms support multiple languages including Python, Java, C++, and JavaScript.
Are these real Amazon OA questions?
Yes. All questions in the LeakCode database come from candidate reports on 1Point3Acres, Blind, Glassdoor, Reddit, and LeetCode. They are not AI-generated. Each question links to its source where available.
Other Amazon OA Years
Related: Amazon OA Hub · Amazon All Questions · All OA Questions · Data Sources