I applied through college or university. The process took 1 day. I interviewed at Zscaler (Bengaluru) in May 2014
Interview
Campus recruitment
1. Aptitude
2. GD
3. Technical Interview : Computer networking, Network security, if the candidate knows the subject and earlier projects.
4. Manager round : Questions like why Zscaler, what are your positives and negatives, expections..
5. HR : Questions like "how long would you like to stay with us"
Interview questions [1]
Question 1
OSI model, How to troubleshoot a network connection in PC, TCP/UDP difference, classes of IP address, difference between encryption/decryption and many such.