The IBM interview process typically starts with an online automated HackerRank coding test. This test assesses a candidate’s problem-solving ability, data structures, and algorithms knowledge.

Candidates who perform well move on to one or more technical interview rounds. These rounds may include questions on:

• System design
• Coding challenges
• Core computer science concepts such as databases, operating systems, and object-oriented programming.

These technical rounds are often conducted via video call with IBM engineers or hiring managers.

During the HackerRank assessment, they asked me to solve a coding problem involving arrays and hash maps.

In the interview, they focused heavily on explaining my thought process and optimizing my solution. One memorable question was: "Can you improve the time complexity of your code and explain why your approach is more efficient?"