Microsoft Software Developer Intern interview questions

Through the call phone they asked me about my self and they ask me a 40kg stone riddle. In the first technical interview they asked to write function that merges two linkedlists I forget what they asked me in the second technical

1st round: 45 min behavioral + technical interview 2nd round: 2 back to back technical coding interviews, 1st interview was with a manager and 2nd interview was with a SWE. Mix of technical coding questions with emphasis on thought process more than code.