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Coding
4 years ago
Demonstrate how to make a useIsMounted() hook in React that provides a boolean for a component's current mount state.
Frontend Engineer

Zalando

Colossal Order

Lyft

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4 years ago
Behavioral
4 years ago
What did you do when you missed a deadline?
Frontend EngineerTechnical Program ManagerSoftware EngineerML Engineering Manager

Zalando

Decathlon

NVIDIA

In the Meraki integration project, the supply chain process required significant optimization of the entire flow. To achieve this, most of the shipping-related process needed to be modified. However, the team lacked sufficient time to complete the work because the planned use of an adapter did not work, requiring me to redesign the flow.

With limited time remaining before system integration testing (SIT), the cross-functional teams and other tracks were ready to test their code, and management was unwilling to postpone SIT and Cycle 1 testing. Since there was an additional round of SIT and Cycle 2 testing planned, I decided to proceed with the changes that the team had already completed. We migrated the completed code to the test instance and communicated that only Phase 1 of the changes would be released initially, while the remaining changes would be delivered during Cycle 2 testing.

I ensured the Phase 1 delivery was designed to avoid impacting the end-to-end flow, allowing the other teams to proceed with testing their portions of the code. This approach ensured that other teams' deadlines were not affected. I also informed the cross-functional teams that the OTM and GTM changes were completed, and the remaining shipping-related code optimization would be delivered before Cycle 2 testing, along with the next round of SIT.

By taking this approach, I ensured that complete testing was not impacted and that the project stayed on track.

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4 years ago
Javascript
4 years ago
Can you demonstrate how to implement Immer's produce() function for managing immutable state in JavaScript?
Frontend Engineer

Zalando

WeWork Logo

WeWork

Playdemic Logo

Playdemic

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4 years ago
Behavioral
4 years ago
Tell me about a time when you got a performance rating you disagreed with.
Frontend EngineerFull Stack Software EngineerData ScientistData Analyst

Zalando

Magic Leap Logo

Magic Leap

Proofpoint Logo

Proofpoint

During my tenure at Cisco, I participated in a project where I collaborated with a devops team and testing team to accomplish the resource allocation . At the end of the project, each intern received an evaluation from our direct supervisor. I was surprised to find that my performance rating was lower than I expected, given the contributions I felt I had made.

Task:I wanted to understand the basis for the rating and felt it was important to clarify any discrepancies between my self-assessment and the supervisor’s perception. My goal was to maintain a positive relationship while advocating for the work I had done.

Action:I requested a brief, one-on-one meeting with my supervisor. In that meeting, I calmly listened to their feedback to understand their perspective fully. Then, I shared specific examples of my contributions:

  • How I had taken the lead on documenting the current resource allocation and new resource allocation based on my experience.

  • My involvement in proper resource allocation resulted in 25% reduction of P1 issues due to resource allocation.

  • The additional responsibilities I took on to get all resource approvals and helm script changes went unnoticed.

I also provided the documentation and metrics I’d been tracking to illustrate the impact of my work. By centering the conversation on factual evidence and outcomes, I was able to highlight aspects of my contribution that might have been overlooked initially.

Result:After reviewing these points, my supervisor acknowledged that some of my behind-the-scenes work wasn’t fully visible to them.  we agreed to have more frequent check-ins going forward. This experience taught me the value of proactive communication and documentation, ensuring that both my manager and I have a clear view of my responsibilities and achievements.

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4 years ago
Frontend System Design
4 years ago
What design principles would you apply to create a progress bar that excels in visually representing the status of API requests or data loading operations?
Frontend Engineer

Zalando

TikTok Logo

TikTok

Canva Logo

Canva

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4 years ago
Frontend System Design
4 years ago
What approach would you take to develop an asynchronous recursive method with a fail condition after a set number of tries, focusing on efficient call management and tracking?
Frontend Engineer

Zalando

ByteDance Logo

ByteDance

Airbnb Logo

Airbnb

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4 years ago
Behavioral
4 years ago
How do you earn trust from your team?
Frontend EngineerEngineering ManagerUX DesignerUX Researcher

Zalando

Gupshup Logo

Gupshup

RentoMojo Logo

RentoMojo

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4 years ago
Javascript
4 years ago
In JavaScript, how would you create a localStorage system where items have a predetermined expiration time?
Frontend Engineer

Zalando

Verizon Logo

Verizon

Casio Logo

Casio

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4 years ago
Coding
4 years ago
In your experience, how do you craft a useEffectOnce() hook in React for executing a specific effect just once?
Frontend Engineer

Zalando

Braintree Logo

Braintree

WeWork Logo

WeWork

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4 years ago
Coding
4 years ago
Can you develop a tic tac toe game that processes inputs from two players, ensures valid input, and determines when the game ends, using a two-dimensional array for positions?
Frontend Engineer

Zalando

SolarWinds Logo

SolarWinds

Creative Assembly Logo

Creative Assembly

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4 years ago

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*All interview questions are submitted by recent Zalando Frontend Engineer candidates, labelled and categorized by Prepfully, and then published after being verified by Frontend Engineers at Zalando.

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