Robinhood Software Engineer Mock Interview

Practice 30 Robinhood Software Engineer questions covering system design, trading systems, and fintech scalability.

Question 20 of 30

What are the differences between an array and a stack?

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William Swansen has worked in the employment assistance realm since 2007. He is an author, job search strategist, and career advisor who helps individuals worldwide and in various professions to find their ideal careers.

This technical question is asking you to compare two concepts used in the role of a Robinhood software engineer. When comparing two concepts, you should first define each of them and then discuss how they differ. It may be helpful to provide examples of how the concepts are used and the work you do to demonstrate your understanding of the subject matter.

William Swansen

"A stack is a data structure that utilizes the last in, first out principle for presenting data to the application. On the other hand, an array doesn't have a fixed structure for how data is added or retrieved by the application. A stack may be used in an application that requires the most recent data to be presented first. An array can be used to retrieve any of the data, regardless of when it was added to the application."

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30Robinhood Interview Questions & Answers

Compatibility

1.Robinhood is very proud of their products and the people who develop them. In your opinion, what distinguishes a great software engineer from an average one?

Personal

2.Here at Robinhood, we value work life balance and initiative. What personal software development projects have you worked on outside of work?

Behavioral

3.If hired by Robinhood, can you estimate what portion of your day will involve coding and other activities you will perform when not coding?

Behavioral

4.Walk me through your process for designing scalable applications.

Behavioral

5.Describe the process you use to create a program, from requirements definition to delivery.

Behavioral

6.How do you go about addressing errors in your code?

Behavioral

7.What process do you use to test and find bugs in an application you've developed?

Behavioral

8.How would you implement Dijkstra's Shortest Path using a programming language with which you are familiar?

Experience

9.Many Robinhood Software Engineers prefer to program in Java. Can you describe how you would implement linear search in JavaScript?

Behavioral

10.How do you go about organizing CSS files, and why do you prefer this approach?

Behavioral

11.Walk me through the steps to build a single page application with multiple sections using the programming framework in which you typically work.

Competency

12.Which do you prefer - a micro-service approach or a monolithic app?

Behavioral

13.How would you accelerate the response time of a website you created for us here at Robinhood?

Creative Thinking

14.Can you describe a tough software development problem you encountered in your last job and discuss how you solved it?

Behavioral

15.What do you look for or check when reviewing another team member's code?

Competency

16.What do you feel are the critical principles of good software engineering?

Competency

17.Can you describe Robinhood's software development life cycle as you understand it?

Experience

18.Here at Robinhood, we have embraced Agile methodology. How experienced are you with the Agile software development process?

Competency

19.Please describe responsive design and the difference between fixed and fluid layouts.

Competency

20.What are the differences between an array and a stack?

Competency

21.Please describe a stack and the two operations it performs.

Competency

22.What are the differences between blocking and non-blocking calls in the context of Node.js?

Competency

23.Robinhood web developers are incorporating HTML5 in their most recent websites. Can you describe the functions of web workers in HTML5?

Competency

24.Can you define black box testing and white box testing and discuss the differences between them?

Experience

25.What are some of the programming languages you are familiar with, and which ones do you prefer?

Communication

26.How would you go about explaining cloud computing to someone here at Robinhood that doesn't have a technical background?

Communication

27.In your opinion, what is the difference between computer software and a computer program?

Behavioral

28.Which design patterns do you use, and in what situations do you use them?

Competency

29.Can you describe what you know about object-oriented programming?

Competency

30.Her at Robinhood, we prefer to create software that scales to keep up with our growth. What methodologies do you use to ensure that your program will scale?