Amazon coding challenge with two scenarios

A 2d array has 0 and 1 as values. In one flip, 0's are changed to 1 if and only if any of the neighbors left, right, top, bottom is 1. Return the total number of flips required to convert the whole grid to 1's. Given an unsorted array A of size N of non-negative integers, find a continuous sub-array which adds to a given number S. Problem: 1. Given a Mix of all types of characters which includes Special characters, Numbers, String in a Log file.

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Get the largest substring which "contains the Characters in Even Position followed by a Special Character and then a meaningful word should be coming up". A startup website has a lot of real-time traffic. I want to see the real-time view refreshed every 1 min of top 20 users by hit count within last 10 mins.

Full distributed system, I have to resolve all the concurrency issues. Here is a question from the "Cracking The Coding Interview" book with a twist. Implement a method to perform basic string compression using the counts of repeated characters.

Think of encoding and decode protocol. How the compression can be reversed properly?

amazon coding challenge with two scenarios

Prepare test plan for a new feature of " deposit cheque via mobile app " which is added under menu tab. Write a function to return string when passed integer. Note : do not use tostring in built function. And total bill M. Our goal is to find any possible list of items that its total value is equal to M using dynamic problem.

Write down a recursive solution. How do you manage a rate card system. On what all parameters should you be considered while creating a rate card for the seller while shipping a product.

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Write a method that merges a fixed number of streams containing an infinite sequence of monotonically increasing integers into an output stream of monotonically increasing integers.

It is important to note that the input stream are infinite, so any solution based on the length of the streams would be considered incorrect.

Note that the question was given in the context of Java with the below code given as the base contract for the method. This was also provided as the definition of "Stream" in this case, and not what is defined in java. Implement union and intersection of two array in a efficient way. Additional information given by the interviewer was: elements of the two given array may be repeated but cannot be repeated in union and intersection array.

A co-ordinate plane was given. A person is standing on 0, 0 and he wants to buy a square plot having N number of apples inside it including the periphery. Question was to return the value of perimeter of that square plot given N. Given 'n' servers each having millions of sorted integers.Skip to content.

Permalink Browse files Amazon sde intern added Loading branch information. Unified Split. Showing 7 changed files with 80 additions and 0 deletions.

amazon coding challenge with two scenarios

File renamed without changes. Find the states - Eight houses represented as cells, are arranged in a straight line. Write an algorithm to output state of the cells after the given number of days. Input: The input to the function consists of two arguments: state: a list of integers representing the current state of cells. Output: Return a list of integers representing the state of cells after the given number of days.

Custom Authentication Challenge Lambda Triggers

Input: The input to the function consists of two arguments: num: an integer representing the number of positive integers N. Output: Return an integer representing the GCD of the given positive integers. You signed in with another tab or window.

Reload to refresh your session. You signed out in another tab or window. Amazon amcat. Online Assessment Overview. The assessment consists of these components:. Find the states. The input to the function consists of two arguments:. Return a list of integers representing the state of cells after the given number of days. Find GCD. Return an integer representing the GCD of the given positive integers.You will still need to enter the security code in addition to your password.

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Amazon Second Chance Pass it on, trade it in, give it a second life.Given a board game of N x M size. A domino is of size 1 x 2 and can be rotated to make it 2 x 1. A player can place a domino in any of the available position. When a player is not able to place a domino, he loses.

An AI is created to play against the user. The AI selects a random position in the board and places the domino there.

Improve this AI. What solution will be the best when board size is small and what if the board size is large. Anyone has any idea how to have a solution to this problem? You have to find out the number of good strings of length N characters in size which you can make using characters A B and C. A string is a good String if it satisfies the following three criteria: The total number of C in the string should not be greater than equal to 4.

There should not be more than two consecutive A's in the string. Any two B's should be at least two characters apart. How do I find total possible good strings for N length string? Time constraint of 1 sec for large N. CareerCup's interview videos give you a real-life look at technical interviews.

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amazon coding challenge with two scenarios

Learn More.If you've got a moment, please tell us what we did right so we can do more of it. Thanks for letting us know this page needs work. We're sorry we let you down. If you've got a moment, please tell us how we can make the documentation better. These Lambda triggers issue and verify their own challenges as part of a user pool custom authentication flow. Amazon Cognito invokes this trigger after Define Auth Challenge to create a custom challenge. Amazon Cognito invokes this trigger to verify if the response from the end user for a custom challenge is valid or not.

You can incorporate new challenge types with these challenge Lambda triggers.

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In this flow, a user authenticates by answering successive challenges until authentication either fails or the user is issued tokens. These two API calls can be repeated to include different challenges.

The Amazon Cognito hosted sign-in web page does not support the custom authentication flow. Javascript is disabled or is unavailable in your browser. Please refer to your browser's Help pages for instructions. Did this page help you? Thanks for letting us know we're doing a good job! Custom Authentication Challenge Lambda Triggers.

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Define auth challenge Amazon Cognito invokes this trigger to initiate the custom authentication flow. Create auth challenge Amazon Cognito invokes this trigger after Define Auth Challenge to create a custom challenge.

Verify auth challenge response Amazon Cognito invokes this trigger to verify if the response from the end user for a custom challenge is valid or not. Document Conventions. Post Authentication Lambda Trigger. Define Auth Challenge Lambda Trigger.Get hands-on experience with AWS and serverless applications at one of our free, guided workshops.

You'll learn to build and deploy your own serverless application using these services for common use cases like web applications, analytics, and more. Scenario: Zombies have taken over major metropolitan areas. The AWS Lambda Signal Corps has built a communications system to connect the remaining survivors using a serverless architecture. The fate of civilization is in your hands. The Corps will be travelling across the globe to deliver workshops on building this communications system.

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Hop on board today and help Wild Rydes build the future of magical transportation! AWS Lambda lets you run code without provisioning or managing servers. You pay only for the compute time you consume - there is no charge when your code is not running.

Just upload your code and Lambda takes care of everything required to run and scale your code with high availability. Amazon API Gateway is a fully managed service that makes it easy for developers to create, publish, maintain, monitor, and secure APIs at any scale. Amazon API Gateway handles all the tasks involved in accepting and processing up to hundreds of thousands of concurrent API calls, including traffic management, authorization and access control, monitoring, and API version management.

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This makes it simple to build, run, and scale multistep applications. Seven things you need to know before attending an AWS serverless workshop:. All participants must have an AWS account established and ready to use at the event.

You must also bring your own laptop.While we're unable to respond directly to your feedback, we'll use this information to improve our online Help.

amazon coding challenge with two scenarios

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