Uber L4 - SDE2 Android Interview experience

I recently had the opportunity to interview with Uber for an L4 SDE2 Android position. The process began with a CodeSignal Online Assessment, where I managed to solve 3 problems completely and about 80% of the 4th one. A couple of days later, I received a call from the recruiter, inviting me for the subsequent rounds.

The first official round was a Phone Screen, where I was asked a Data Structures and Algorithms question about finding the minimum number of elements to append to a string to make it a palindrome. I solved this problem completely. My recruiter then informed me that my resume was moved forward for the onsite interviews.

The onsite rounds included:

1. DSA Round: This round featured a mathematical DSA question. I was given a number x and an array, and had to determine if it's possible to make all elements in the array equivalent to any number y by adding or subtracting multiples of x. The initial question set x to 1, which I solved in multiple ways. The follow-up extended x to be any integer greater than or equal to 1.
2. Android Machine Coding: For this round, I had to open a pre-written Android application in Android Studio and implement a couple of functionalities for a notes app, specifically edit and delete a note. I was also asked to review some of the existing code.
3. HLD Round: This was a High-Level Design round where I was tasked with designing an Android SDK that includes a search bar, which, when typed into, would display a list of places. Despite feeling that this round went quite well, I received a 'no hire' feedback for it.
4. HM Round: The final round was with a Hiring Manager, where I faced standard behavioral questions and was asked to deep dive into one of my projects.

Ultimately, I received a call from the recruiter informing me that they decided to move ahead with another candidate.