Zeta interview experience Real time questions & tips from candidates to crack your interview
SDE - 1
Zeta
3 rounds | 9 Coding
problems
Selected Interview preparation journey
Journey
I used to practice DSA on coding platforms. I had already studied DSA during college, so I practised at least one question daily. I also started learning LLD, knowing I would be interviewed as an experienced candidate.
Application story
I applied through a referral. I received a call from the recruiter after a few days. She asked me basic questions like my current CTC, notice period, tech stack, and projects. After that, she sent me an invitation to an offline drive at their office.
Why selected/rejected for the role?
I had a good grasp of DSA, which helped me clear the first round. I also learned basic LLD and OOP, which helped me clear the system design round.
Preparation
Duration: 2 months
Topics: Data Structures, Algorithm, OOPs, LLD, Java, Spring Boot
Tip 1: Practice DSA thoroughly.
Tip 2: Be familiar with OOP concepts and the basics of LLD.
Application process
Where: Referral
Eligibility: Nope
Tip 1: Mention tech stacks and relevant projects.
Tip 2: Do not lie.
Interview rounds
01
Round
Medium
Face to Face
Duration60 minutes
Interview date4 May 2024
Coding problem2
1. Next Greater Element - I
Moderate
0/80
Asked in companies
You are given two distinct 0-indexed integer arrays nums1 and nums2, where nums1 is a subset of nums2.
For each 0 <= i < nums1.length, find the index j such that nums1[i] == nums2[j] and determine the next greater element of nums2[j] in nums2. If there is no next greater element, then the answer for this query is -1.
Return an array ans of length nums1.length such that ans[i] is the next greater element as described above.
Problem approach
1) Explained brute force
2) Optimized using stack
3) Explained time and space complexity
2. Maximum Size Rectangle Sub-matrix With All 1's
Hard
10m average time
80% success
0/120
Asked in companies
Given a rows x cols binary matrix filled with 0's and 1's, find the largest rectangle containing only 1's and return its area.
Problem approach
1) Told a very naive approach to consider every rectangle - O(n^6)
2) Optimized this approach using DP - O(n^4)
3) Told final solution which uses stack - O(n^2)
02
Round
Medium
Face to Face
Duration90 minutes
Interview date4 May 2024
Coding problem4
Low-level design, Java, OOPs, DBMS concepts.
1. System Design
Design low-level design of a food delivery app like Zomato/Swiggy.
4. Java
Problem approach
Tip 1: If you are not familiar with a concept, tell the interviewer straightforwardly. Do not give a wrong answer.
I was new to Java at that time and did not know much about multithreading in Java. I clearly told them that I had not studied it, and the interviewer switched the question.
03
Round
Easy
Video Call
Duration40 minutes
Interview date5 May 2024
Coding problem3
Hiring Manager round.
2. Current company projects
- Explain the current company project?
- They asked me some Java Spring Boot questions since I have been using it in the project.
3. Behavioral Questions
- How do you handle conflicts?
- Why are you switching so early?
Problem approach
Tip 1: Prepare for such questions beforehand.
Here's your problem of the day 
Solving this problem will increase your chance to get selected in this company
Skill covered: Programming
What is the purpose of the return keyword?
Choose another skill to practice
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