Background
Company - Samsung
YOE: 1.5 years
College - IIT/NIT CSE dual degree
Before Screening Round
Start of April : Recruiter approached through LinkedIn.
Manager cantacted as well before screening round and discussed my current role and few basic behavioral based questions.
Screening Round - 1hr (19th April)
Number of ways to form a target string concatenating any number of words from a dictionary where repitition is allowed.

Technical Round - 1hr (22nd April)
2 coding question. First one was from binary tree.

• find angle between dials at given time.

Few questions were asked from my resume.
One OS based question was also asked - How a program compile and run?

Technical + Hiring Manager Round - 1 hr 30 min (26th April)
(Taken by a very senior employee based in US.)
Few behavioral questions were asked -

• Postive and negative qualities were discussed.
• Reason for job change was discussed
  OS questions -
• Difference between stack and heap
• how to copy one buffer content to another without using any extra space

I suggested the solution using XOR operation.

• Few practical kind of puzzles were asked as well.
• Also had discussion on requirement analysis for elevator system design.
• He shared details about the team and the work. Then, he asked for my opinion on what would be interesting for me in the team.

Outcome - Next day, I got the call from HR that I have been selected and offer will be coming soon. I was expecting more rounds. It was too surprising for me that I couldn't believe as My first thought was Is it a prank or something. Got offer letter in Mid-May.