Amazon embedded software engineer interview questions

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Amazon embedded software engineer interview questions

Return the number of calls that the function Drop that returns a drop object, needs to be called so that the interval [0, 1 is covered. For example, if the first Drop call returns drop object drop. So how many calls need to be made to ensure the interval [0, 1 is covered. The location and radius can map to any real value. Given a dictionary, find all pairs of words that, when concatenated together, form a palindrome.

The sample IDs represent the samples contained in the classified set. You are a game developer working on a game that randomly generates levels. A level is an undirected graph of rooms, each connected by doors. The player starts in one room, and there is a treasure in another room.

Some doors are locked, and each lock is opened by a unique key. A room may contain one of those unique keys, or the treasure, or nothing. Implement a representation for a level and write code that, given a level and starting room, returns true if the treasure can be reached by the player—likely requiring them to find certain other keys first—or false if there is no solution. You are given a positive integer number and you have to return the greatest smaller tidy number of this input number. If the input number itself is tidy, then, it become the answer Example Input: output: input: output: 99 input output: A tidy number is a number whose digits are in non-decreasing order.

You are given a positive integer number and you have to return a boolean telling whether the input number is a tidy number or not. For example, is a tidy number, is also a tidy number but is not a tidy number. Interview Question: essentially given a bunch of sets in an array, print out the cross product of all of those sets.

You are given a sorted list of distinct integers from 0 to 99, for instance [0, 1, 2, 50, 52, 75].

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Your task is to produce a string that describes numbers missing from the list; in this case ",51,". You observe the points from 0,0 with viewing direction and viewing angle. Given an array xn,ynand a viewing angle v 45 degreefind the direction that can observe max number of points.

You have a matrix that is sorted as such: For each value, every index to its right and below it must be larger than the current space's value.

Likewise, all entries to its left and above it must be smaller than the current value. How would you go about searching this matrix for a specific number, given its sorted nature? Just a disclaimer: I doubt you will ever get this interview question. My interviewer even started off by saying, "Hmm, well this isn't really fair, but Question: You have a group of pigs and buckets of food for said pigs.

There are 1, buckets of food, and exactly 1 of them is poisoned. Your goal is to determine, by the end of 1 hour, which bucket is poisoned. The poison takes 30 minutes to kill a pig, and you'd like to kill as few pigs as possible.

The number of pigs you can test is limitless, and you can assign a number to each bucket and each pig so that you know exactly which pig ate from which bucket s.

You determine which buckets to feed to which pigs, but you have no timer and no way to guesstimate the time.An embedded system is a computer system that is part of a larger system or machine.

Amazon Interview Questions

It is a system with a dedicated function within a larger electrical or mechanical system. With embedded system, it is possible to replace dozens or even more of hardware logic gates, input buffers, timing circuits, output drivers, etc. Real-time embedded systems are computer systems that monitor, respond or control an external environment.

This environment is connected to the computer system through actuators, sensors, and other input-output interfaces. The microcontroller is a self-contained system with peripherals, memory and a processor that can be used as embedded system. DMA address deals with physical addresses. It is a device which directly drives the data and address bus during data transfer.

So, it is purely physical address. How can you reduce it? Interrupt latency is a time taken to return from the interrupt service routine post handling a specific interrupt. By writing minor ISR routines, interrupt latency can be reduced. Timers in embedded system are used in multiple ways Real Time Clock RTC for the system Initiating an event after a preset time delay Initiating an even after a comparison of preset times Capturing the count value in timer on an event Between two events finding the time interval Time slicing for various tasks Time division multiplexing Scheduling of various tasks in RTOS 12 Explain what is a Watchdog Timer?

A watchdog timer is an electronic device or electronic card that execute specific operation after certain time period if something goes wrong with an electronic system. Embedded systems require infinite loops for repeatedly processing or monitoring the state of the program. For instance, the case of a program state continuously being verified for any exceptional errors that might just happen during run-time such as memory outage or divide by zero, etc. Some of the commonly found errors in embedded systems are Damage of memory devices static discharges and transient current Address line malfunctioning due to a short in circuit Data lines malfunctioning Due to garbage or errors some memory locations being inaccessible in storage Inappropriate insertion of memory devices into the memory slots Wrong control signals 15 Explain what is semaphore?

A semaphore is an abstract datatype or variable that is used for controlling access, by multiple processes to a common resource in a concurrent system such as multiprogramming operating system. Semaphores are commonly used for two purposes To share a common memory space To share access to files 16 Explain what is the difference between mutexes and semaphores?

Mutexes Semaphores A mutex object enables one thread into a controlled section, forcing other threads which tries to gain access to that section to wait until the first thread has moved out from that section Semaphore allows multiple access to shared resources Mutex can only be released by thread which had acquired it A semaphore can be signaled from any other thread or process. Mention what happens when recursion functions are declared inline?

Recursion function can be used when you are aware of the number of recursive calls is not excessive. Inline functions property says whenever it will called, it will copy the complete definition of that function.

Recursive function declared as inline creates the burden on the compilers execution. Semaphore or Mutex cannot be used for interrupt context in Linux Kernel. While spinlocks can be used for locking in interrupt context. What is CI? Continuous integration is a software development method where members of the team can There are a lot of open source tools and testing frameworks available for DevOps.

amazon embedded software engineer interview questions

These frameworks assist R and Python are both open-source programming languages with a large community. New libraries or SDLC is series of Home Testing. Must Learn! Big Data. Live Projects. What is Factor in R?Fairygodboss provides free job reviews for women, by women.

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Top 18 Embedded Systems Interview Questions & Answers

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Showing all 60, reviews. The job was really tough physically so I could not keep up. Otherwise it was one of the most enjoyable jobs I have had. All of my coworkers were friendly and there were no issues other than physically for me.

Was this review helpful? Yes No. Share Tweet. Copy link. Very flexible. Not enough shifts to pick up or to work. Not enough hours for the staff. Great job to work. Guidelines needs to be extended for the staff.Whether you are preparing to interview a candidate or applying for a job, review our list of top Software Engineer interview questions and answers. What programming languages have you used in the past? What are your top two programming languages? This question allows you to see how many programming languages the candidate knows and whether they are familiar with a language you commonly use at your company.

84 Software Developer Interview Questions and Answers

What to look for:. How much are you coding on a daily basis? If you do not code on a daily basis, what is typical in your role? Since coding is a big part of being a software engineer, if a candidate isn't spending much of their time coding and they aren't in a management role, it may be a sign of problems with their coding skills.

How comfortable are you in a startup environment, or do you prefer working in a more established company? Working in a startup is very different than being at a more established company. You want to make sure a candidate is a good fit for your company environment and expected workload that comes with working in a startup. What distinguishes a great software engineer from a good one? Do you feel you have those qualities?

It helps to understand how a candidate feels about what makes someone the best in their career and how they feel about their skills and what makes them a good or great software engineer. What's the most important thing to look for or check when reviewing another team member's code?

While there's no definitive right or wrong answer to this question, it is designed to test an applicant's knowledge, how well they articulate their debugging process, and whether they're a victim of tunnel vision or can they keep their focus on the project at large. In your opinion, what are the principles of good software engineering? What are some basic principles everyone should follow? There are different opinions on what makes good software engineering, and those opinions guide a company's culture.

This question will allow you to see if the candidate's philosophy on engineering matches your own. If needed, how would you go about designing scalable applications? Walk us through your process. This question is designed to test a candidate's knowledge and thought processes when it comes to design and solving common project specific problems.

Please note that we are not your career or legal advisor, and none of the information provided herein guarantees a job offer. Post a Job. I having a passing knowledge of SQL and Perl. What to look for: Commitment to coding Applicant's coding ability Role in previous job Example: "I code at least 30 hours a week. The rest of my time at work is spent working on design reviews, scrums, meetings and other tasks to keep projects moving forward. What to look for: Company fit Ready for startup life Understanding of expected workload Example: "There is something to be said for the predictability of working in a more established company with it's set goals and office hours.

However, I must say I really enjoy the unpredictability and excitement of working at a startup. Yes, the hours are long and everything moves at a breakneck pace, but there's nothing quite like building something from scratch and seeing where it goes. What to look for: Thoughts on software engineering Their idea of greatness Honesty and introspection Example: "A great software engineer has a healthy balance between perfectionism and pragmatism. Too often engineers want their code to be perfect, while losing sight of the overall goals of the project.

A great programmer also learns not to fall in love with their own code, to keep a healthy skepticism until it's been thoroughly tested, making sure it is the right choice for the project at hand.

amazon embedded software engineer interview questions

And yes, I believe have the qualities of a great programmer, though working on my need to be perfect is an ongoing battle. What to look for: Attention to deal Debugging skills Problem-solving ability Example: "Some things you want to look for when reviewing a team member's code is its functionality and how readable it is.

Is it secure, or are there obvious flaws that would cause security problems and make it easy to hack? Is the code simple, or are there a lot of unnecessary line of code that needs to be removed or rewritten?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.

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.

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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? 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.

amazon embedded software engineer interview questions

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.

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.

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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. Find distributed median of all the 'n' servers. Given a binary matrix of 0 and 1 where we can move in 4 directions left, right, top, down and we can only pass through 1's.

Find the shortest path from given source coordinate a,b to destination m,n given we can flip any one of the zero to one. Program for the given boolean matrix print size of matrix that forms X by 1s Input: 1 1 1 1 1 1 1 1 1 Otput:3 1 1 1 1 1 That form x and size is 3.

The Best Ways To Answer Behavioral Interview Questions / Competency Job Interview Questions

How you are now going to recommend friends to a person based on number of mutual friends? So, come up with the function:. If one gives you two Person's id, how can you tell if these 2 persons are blood related. So, write a function that is:.This set of Embedded Software Engineer interview questions is designed to help you identify skilled candidates to manage your embedded software development lifecycle.

Embedded Software Engineers design, develop and install software solutions to meet company needs. They are responsible for building high-quality, fully functional embedded software systems, aligned with coding and design standards. Ask them about hardware management, OS system configuration and debugging code. Your ideal candidates should combine theoretical knowledge with a continuous interest in technology developments. Keep an eye out for candidates who show a desire to learn new things, by participating in seminars and hackathons or contributing to open source software projects.

Start a free Workable trial and get access to interview scheduling tools, interview kits and scorecards. Start hiring now with a day free trial. Or talk to us about your hiring plans and discover how Workable can help you find and hire great people.

Skip to content. HR Toolkit HR Templates Interview questions Embedded Software Engineer interview questions This set of Embedded Software Engineer interview questions is designed to help you identify skilled candidates to manage your embedded software development lifecycle.

Jump to section: Introduction Computer Science questions Role-specific questions Behavioral questions. Download PDF. Get started. Let's grow together Start hiring now with a day free trial. Try for free Get a demo.Designing Large Scale Distributed Systems has become the standard part of the software engineering interviews. Check out the following resources to prepare for software engineering interviews:.

At Educative. Following are the most frequently asked questions along with a few pointers to the things that interviewers want you to consider while designing the system. Given a typically long URL, how would how would you design service that would generate a shorter and unique alias for it. Videos mean that your service will be storing and transmitting petabytes and petabytes of data.

You should discuss how to efficiently store and distribute data in away that a huge number of users can watch and share them simultaneously e. Users of the services can post questions or share links. Other users can answer questions or comment on the shared links. The service should be able to:. When designing a social medial service with hundreds of million or billions of usersinterviewers are interested in knowing how would you design the following components. A lot of times, interviewers spend the whole interview discussing the design of the newsfeed.

For Type-Ahead, as the user types in their query, you need to design a service which would suggest top 10 searched terms starting with whatever the user has typed. Discuss things like:. For Web Crawler, we have to design a scalable service that can crawl the entire Web, and can fetch hundreds of millions of Web documents. Following are some resources that can help you prepare for software engineering interviews. If you have any feedback, reach out to me on Twitter.

Fahim is the co-founder of Educative. We are building the next generation interactive learning platform for software engineers and instructors. Learners learn by going through interactive courses. Instructors can quickly create and publish interactive courses using our course builder.


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