I recently interviewed at Zeta for 6 month SDE internship.
I had 4 rounds each eliminatory in nature.
1st was online coding test on codejudge platform. This was 90 mins test with 3 questions of medium to lower hard difficulty.

Interview Rounds:

Round 1 : Problem Solving 50 mins.

I was given two problems as follows:

1. https://leetcode.com/problems/time-needed-to-inform-all-employees/
2. https://www.codingninjas.com/studio/problems/paint-house_1460385

I coded them easily and the interviewer was satisfied.
The result were declared the same evening.

Round 2: CS Fundamentals 50 mins.

The interviewer asked about my projects and some questions about databases. Then he asked about polymorphism and inheritance. He also asked a little about threading and async operations. He was satisfied with my answers and I cleared this round too.

Round 3: Fitment round 30 mins

This was a behaviour based round. The interviewer was very friendly and few of the question he asked:

• How do you seek help when you are stuck?
• What will you do if you get another offer before joining Zeta?
• What are your hobbies and interests?

After few days of this round I recieved the mail that I was selected.