Two technical rounds with engineers then CTO round, stalled with no feedback

Application

I applied online. The process took 3 weeks. I interviewed at Zomato in Jun 2017

Interview

Went through three rounds. First two were technical with engineers of the company. Last one was with CTO of the company. Interviewers were quite friendly but the whole process was brought to a halt without any feedback which was quite unprofessional.

Interview questions [2]

Question 1

Initial rounds : 1. Find the minimum number of switches you have to press to turn on all the bulbs. 2. Delete a node with a pointer in linked list. 3. Given a dictionary list possible approaches for finding whether key exists in the dictionary or not.