I applied online. The process took 2 weeks. I interviewed at IBM (Bengaluru) in Mar 2014
Interview
1st Round – Online Coding
1. Contiguous elements in an array whose sum is k.
2. Convert sorted array to binary search tree
2nd Round – Telephonic
1. Given an array of characters, find the longest continuous non-repeating sequence of characters. Algo + Code
3rd Round – Technical round
1. Find the mirror image of a binary tree. Algo + Code
2. Given a string, find the largest repetitive sequence. Algo + Code
4th Round – Manager Round
Asked dilemma situation. Any process development work, work experience and all.
Applied through the company portal, completed an online coding assessment, followed by a technical interview covering data structures, algorithms, OOP concepts, and project experience. Concluded with an HR discussion about the role, career goals, availability, and compensation expectations.
## IBM Interview Process
The process began with initial resume shortlisting, followed by competitive **DSA and coding rounds** to test core technical concepts. After clearing those, I cleared two comprehensive interviews with the **Hiring Manager/Tech Expert** and **HR**.
Describe the interview process: The process consisted of three rounds: an initial online assessment focusing on data structures and algorithms, followed by two technical video interviews. The technical rounds were intensive, covering system design, live coding, and deep-dive questions into previous project experience and database optimization.
Interview questions [1]
Question 1
Design a scalable URL shortener system and explain how you would handle high read/write throughput.