I received an Online Assessment that contained a Technical Portion with two questions and 90 minutes to solve them. Then, a Work Simulation followed, which had a time limit of 4 hours.

After that, I moved onto the Onsite Interview, which consisted of three rounds over a 3-hour period.

Given a string "abaca", find the minimum number of operations to make the string empty.

Example:

Operation 1: Remove 'b' -> "aaca" Operation 2: Remove 'c' -> "aaa" Operation 3: Since all the 'a's are together, remove all 'a's at once.