ZS Associates India Pvt Ltd interview experience Real time questions & tips from candidates to crack your interview
Decision Analytics Associate
ZS Associates India Pvt Ltd
5 rounds | 11 Coding
problems
Rejected
Interview preparation journey
Application story
So, ZS came to our college for a hackathon, which is their all-India hackathon — ZS Campus Beats. We had to apply as a team of a minimum of 3 and a maximum of 4 members. If a team ranked 125 or below in the all-India rankings, they would get a chance for a PPI.
Why selected/rejected for the role?
In the final interview, I was rejected because two things happened: I was fumbling a lot, and when I fumbled, my internet also got cut off. So, I think that could be the reason for my rejection in the final round.
Preparation
Duration: 1 month
Topics: Case study, Statistics, Logical reasoning, Critical thinking, Speaking Skills, SQL
Tip 1: Be confident in your speaking skills.
Tip 2: You have to be prepared for case studies.
Tip 3: You have to be prepared with good logical thinking.
Tip 4: You have to be good at teamwork.
Tip 5: You have to be very clear about anything you say, along with your approach.
Application process
Where: Campus
Eligibility: 7 CGPA and 70% in 10th and 12th, (Salary Package: 15 LPA)
Tip 1: Keep your resume clean.
Tip 2: Be familiar with everything mentioned in your resume.
Interview rounds
01
Round
Easy
Assignment
Duration90 minutes
Interview date5 Apr 2025
Coding problem3
1. Case Study Question
A case study was given of at least 20–25 pages, with lots of graphs, pie charts, bar charts, etc., containing all kinds of data. A predictive question will be asked from it, and you and your team have to calculate the value or the approximate value of that question and also explain your approach—how you arrived at a particular answer.
2. SWOT analysis question
You have to perform a SWOT analysis of the particular topic or product given in your case study and explain it with your team.
3. English Grammar
Simple English grammar questions like rearranging words, finding mistakes in a sentence, etc.
02
Round
Easy
Online Coding Interview
Duration30 minutes
Interview date5 Apr 2025
Coding problem3
It was the aptitude round.
1. Puzzle
While checking the value of 10 observations, it was noted 75 was wrongly noted as 25 while calculating the mean. The present mean is 50. Find the correct mean.
2. Puzzle
31st to 40th rank students are standing around the table. The marks obtained in mathematics in the final semester are 95 by 8 out of 10 and the remaining got 90. Find the standard deviation of their marks.
Problem approach
According to the question-
Total marks = (95 × 8) + (90 × 2) = 760 + 180 = 940
Mean of marks = 940/10 = 94
Variance = 8 (95 - 94) + 2 (90 - 94) = 8(1) + 2(4) = (8 + 8) = 16
Formula:
Standard deviation = √(variance)
Hence,
SD = √(16) = 4
3. Puzzle
What is the mode of the distribution where the mean and median are 28.33, and 28 respectively?
Problem approach
Mean – Mode = 3 (Mean – Median)
28.33 - mode = 3(28.33 - 28)
28.33 - mode = 1
Mode = 27.33
03
Round
Easy
Assignment
Duration45 minutes
Interview date9 May 2025
Coding problem1
This round tested English communication.
1. English Communication
- Identify the segment that contains a grammatical error:
One of the / players / were / injured. - Select the most appropriate option to substitute the underlined segment:
I have completed my graduation in 2022. - Choose the correct option to complete the sentence:
Neither the teacher nor the students ________ present in the class.
04
Round
Medium
Video Call
Duration60 minutes
Interview date21 May 2025
Coding problem2
1. Case Study
Asked from Case Study that In a area how much sales a company is doing before a year.
Problem approach
You have to find answers using graphs and stats of current year and compare it with previous year and then you can find answer.
2. Second Highest Salary
Write a SQL query to get the second highest salary from the Employee table. (Practice)
Problem approach
SELECT MAX(salary)
FROM employees
WHERE salary < (SELECT MAX(salary) FROM employees);
05
Round
Medium
Video Call
Duration40 minutes
Interview date5 Jun 2025
Coding problem2
It was an EBI Round.
1. Puzzle
3 Bulbs and 3 Switches puzzle. (Learn)
Problem approach
Turn Switch 1 ON and leave it on for a few minutes.
Then turn Switch 1 OFF.
Turn Switch 2 ON.
Leave Switch 3 OFF.
Now go inside the room.
2. HR Questions
Scenario based like what you will do in in a particular situation?
Problem approach
So in this you have answer very carefully in these types of questions the interviewer wants that kind of answers which suits the interviewer.
Here's your problem of the day 
Solving this problem will increase your chance to get selected in this company
Skill covered: Programming
Which data structure is used to implement a DFS?
Choose another skill to practice
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