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WhatsApp Interview
Questions

27 Questions and Answers by Ryan Brunner

Published December 26th, 2019 | Ryan has over 10 years of experience interviewing
candidates in the healthcare, public service, and private manufacturing/distribution industries.
Question 1 of 27
Would you say that you are a goal oriented on the job? What would I be able to do as your manager to help you achieve your goals if hired here at WhatsApp?
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How to Answer
At the heart of this question lies your interviewers desire to see what motivates you as a potential employee at WhatsApp. Make it clear to your interviewer that you certainly are motivated by on the job goals and do this by using an example of a time where you were motivated by and achieved a goal. Then, think deeply about the type of manager that you like to work for in terms of goal setting and helping our achieve your goals. Let your interviewer know what type of management styles you appreciate the most while being open to any style.
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1.
Would you say that you are a goal oriented on the job? What would I be able to do as your manager to help you achieve your goals if hired here at WhatsApp?
At the heart of this question lies your interviewers desire to see what motivates you as a potential employee at WhatsApp. Make it clear to your interviewer that you certainly are motivated by on the job goals and do this by using an example of a time where you were motivated by and achieved a goal. Then, think deeply about the type of manager that you like to work for in terms of goal setting and helping our achieve your goals. Let your interviewer know what type of management styles you appreciate the most while being open to any style.

Ryan's Answer #1
"I would definitely say that I am goal oriented on the job in wanting to contribute any way that I can to the overall benefit of the organization. In my current organization, our leadership focuses on overall sales numbers at the end of the year. To help achieve these goals, our department creates our own goals to help achieve the sales numbers needed to succeed. Last year, one of those goals was to be as creative as possible in our user experience design processes. With the launch of an exciting new app midyear, sales numbers skyrocketed and our department was instrumental in that. For me, it was important that we determined our goals as a team with the final stamp of approval from our manager. While this style of management really helped motivate me, I can thrive under any management style as long as expectations and goals for my work are clearly set."
Ryan's Answer #2
"For me, my day to day work is much more meaningful when I have goals to work for. In my current role, we have set timelines for our projects and this helps lay the framework for our goals. If hired for this position, my expectations of you as my manager would be to have goals clearly defined and a supportive atmosphere to be provided to work within."
2.
If hired here at WhatsApp and tasked with helping design a UI for a new mobile app, what important factors would you consider in that design?
With consumer mobility being at an all-time high and only increasing year after year, just about every industry has entered the mobile app game and life at WhatsApp is no different. For this question, it is important to have a good understanding of the different mobile UI designs and your job for this question will be tying the business needs of WhatsApp into an effective mobile app. In your answer, talk about what you know about the business needs of WhatsApp and then explain to your interviewer how you would build those into a great mobile app for their future.

Ryan's Answer #1
"Here at WhatsApp, I envision users of your products in the banking industry to want security and ease of use in their products. In looking to design a UI for a new mobile app, my considerations would be a secure log-in screen and user profile section of the app. As well, I would put an automatic log out into place within the app. On top of these security items, I would prioritize ease of placement for a contact screen, services screen and an aesthetically pleasing home screen."
Ryan's Answer #2
"In the private insurance industry, I can imagine that an onboarding tutorial screen would be very beneficial to users using the app for the first time. I have experience designing these for a few different mobile apps. Other factors I would consider would be prioritizing the important information to have laid out within the app and how to best lay it out. If a menu will be utilized, I would work with key decision makers on what would make the most sense for a menu layout within the app."
3.
What SDLC models are you familiar in working with?
As a software engineer, you are very familiar with the software development life cycle. For this question, your interviewer is looking to hear what models you have worked on in the past. While there isn't necessarily a right or wrong answer to this question, try to show your flexibility to working with different SDLC models by bringing up your past experiences. Then, show you have knowledge of different models like the waterfall model or agile model. It is also a good idea to use this question as an opportunity for you to learn more about WhatsApp by asking your interviewer which model they work off of.

Ryan's Answer #1
"During my training in software engineering and in my early career, the waterfall model was the standard. In this model, each phase of the development process happens in a set order and projects using this model are easily managed. But over time, as the development projects that I have led have become more complicated and intricate, I have implemented the spiral model. This model has allowed the ability of end users to give feedback early on and often during development and helps to build a more customized product to our customers."
Ryan's Answer #2
"In my current position with XYZ Company, my department utilizes the agile model in development life cycle. Since our products are so tailored to the needs of our customers, we get a working product very early on in the process and then I work hand in hand with customers to fine tune the software moving forward. It is a very effective model that has built a great reputation for our software among customers. I also have familiarity working with the iterative model and it has similar advantages to the agile model. If I were hired here at WhatsApp, can you expand on what models you use here in your software development life cycle?"
4.
In your current work, what are the important steps you take in the data validation process?
Depending on your training and your past roles prior to interviewing at WhatsApp, you may be familiar with one or two of the many trains of though regarding the steps of a data validation. Whatever formal process you are familiar with, be sure to check the boxes of discussing data screening and data verification as part of your process. Your interviewer will be looking to hear that you check those boxes as they are imperative in the software field.

Ryan's Answer #1
"As I embark on a data validation process in my current role, my first step is to roadmap a detailed plan to keep on task. I utilize benchmarks and the expectations of key stakeholders as my guide. Once underway, I validate the database and the data formatting to ensure that data is properly screened for its overall health. Then, by finishing with sampling, tests are performed to hopefully show that the data is useful within the system."
Ryan's Answer #2
"The most important steps in a data validation process are determining the data to sample, scouring the existing database and validating the final data format. My first step is to use my best judgment to determine if I will validate a sample or the entire data set. This determination is based on overall size of the set and the timeframe that I have to work on the project. Then, I take the time to screen data in the existing database to calculate the number of unique ID's and records to come into the system. Last, I have to verify that the source data matches the schema within the targe"
5.
A huge part of our business here at WhatsApp is designing software for iOS. In this role, how would you steer away from retain cycles when using closures in Swift programming language?
This question allows your interviewer to assess your technical knowledge and skills in designing apps for iOS products in a very simple way. To successfully answer it, make sure that you can speak knowledgeably about the swift programming language and using closures to capture and store references within the software. To piece together everything for your interviewer, give a clear understanding of why retain cycles must be avoided in your processing.

Ryan's Answer
"Because ARC handles most of the memory knowledge in Swift, I know ARC is prone to memory leaking and this can cause major issues in apps over time. The fix that I've used in my career to avoid retain cycles is using weak references in my coding."
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