ServiceNow | | IC2 | Ghosted

I recently interviewed at ServiceNow for a Software Engineer position. The interview process consisted of four rounds.

Round 1 (DSA)

1. Palindromic Substrings (Leetcode)
2. Longest Palindromic Substring (Leetcode)
3. Unique Paths (Leetcode)

Round 2 (DSA+Design)

1. Find K Closest Elements (Leetcode)
2. System optimization related questions: Given system A and B, you are system B and want to read some huge data from system A. How will you do that? Constraint was system A can't expose any API or share their credentials to DB/Data Source.
3. Design a system to count clicks on a video.

Round 3 (HM)

1. Standard HM round related questions: How did you resolve conflict with team members? Did you encounter any task that you weren't able to do, how did you resolve it? Things that I like and not like about my current role. Give an example of an LLD design change that you implemented in your current role and what was its impact? More questions like above...
2. On a website, when someone opts to change the language from English to something else, how does that happen?
3. Design a car ride booking system.
4. Questions related to my profile.

Round 4 (Master Round)

1. Discussion about a project.
2. Design discussion of my existing project.
3. Any problem that I wasn't able to solve.
4. Producer-Consumer problem of multithreading.
5. Design Instagram.