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ZIGRAM Data Specialist Interview Questions and Answers

Updated 15 Sep 2021

ZIGRAM Data Specialist Interview Experiences

1 interview found

I applied via Naukri.com and was interviewed in Mar 2021. There was 1 interview round.

Interview Questionnaire 

3 Questions

  • Q1. Technical Discuss on the last ML project I worked on?
  • Q2. Start to End approach for regression problem
  • Ans. 

    Start to end approach for regression problem involves defining the problem, collecting data, preprocessing, modeling, and evaluating.

    • Define the problem and set the goal

    • Collect relevant data and preprocess it

    • Choose a suitable regression model

    • Train the model and evaluate its performance

    • Fine-tune the model and repeat the process if necessary

  • Answered by AI
  • Q3. Explain basic statics to non-tech person
  • Ans. 

    Statistics is the study of data. It helps us understand and interpret information by using mathematical methods.

    • Statistics involves collecting, analyzing, and interpreting data.

    • It helps us make decisions based on data and identify patterns and trends.

    • Common statistical measures include mean, median, mode, and standard deviation.

    • Statistics can be used in various fields such as business, healthcare, and social sciences.

    • F...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Strong basic concepts of statics and ML

Skills evaluated in this interview

Interview questions from similar companies

Interview experience
2
Poor
Difficulty level
Hard
Process Duration
2-4 weeks
Result
Selected Selected

I applied via Naukri.com and was interviewed before May 2023. There were 2 interview rounds.

Round 1 - Technical 

(1 Question)

  • Q1. Write a query to extract unique values?
  • Ans. 

    Query to extract unique values

    • Use the SELECT DISTINCT statement in SQL to retrieve unique values from a table

    • For example, SELECT DISTINCT column_name FROM table_name;

    • In Python, you can use the set() function to extract unique values from a list or array

  • Answered by AI
Round 2 - One-on-one 

(1 Question)

  • Q1. Previous role and projects

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - One-on-one 

(2 Questions)

  • Q1. About work experience
  • Q2. About education
Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Naukri.com and was interviewed in Dec 2024. There was 1 interview round.

Round 1 - Technical 

(3 Questions)

  • Q1. Machine Learning-related stuff: Confusion Matrix, R2 score, etc.. Also, Python & Statistics.
  • Q2. Explain any one project.
  • Ans. 

    Developed a predictive model to forecast customer churn for a telecom company.

    • Collected and cleaned customer data including usage patterns and demographics.

    • Used machine learning algorithms such as logistic regression and random forest to build the model.

    • Evaluated the model's performance using metrics like accuracy, precision, and recall.

    • Provided actionable insights to the company based on the model's predictions.

  • Answered by AI
  • Q3. Difference between Data Analyst and Data Scientist.
  • Ans. 

    Data Analyst focuses on analyzing data to provide insights, while Data Scientist focuses on using advanced algorithms and machine learning to predict future trends.

    • Data Analyst focuses on analyzing data to provide insights for decision-making.

    • Data Scientist focuses on using advanced algorithms and machine learning to predict future trends.

    • Data Analyst typically works with structured data, while Data Scientist works wit...

  • Answered by AI

Interview Preparation Tips

Topics to prepare for MapmyIndia Data Analyst interview:
  • Machine Learning
  • Statistics
  • Python
Interview preparation tips for other job seekers - The ML & Python basics should be strong. Add relevant projects to the resume.
Interview experience
2
Poor
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Walk-in and was interviewed before Aug 2023. There were 2 interview rounds.

Round 1 - Aptitude Test 

It was deciphering spoken language to subtitle for a complicated accented show

Round 2 - HR 

(2 Questions)

  • Q1. Why do you want to work here?
  • Ans. 

    I am passionate about the company's mission and values, and I believe my skills and experience align well with the opportunities here.

    • Passionate about company's mission and values

    • Skills and experience align well with opportunities

    • Excited about potential for growth and development

  • Answered by AI
  • Q2. What are you passionate about that made you apply for this job?
  • Ans. 

    I am passionate about using data analysis to drive business decisions and improve processes.

    • I have always been fascinated by the power of data to uncover insights and drive strategic decision-making.

    • I enjoy working with large datasets and using statistical tools to extract meaningful information.

    • I believe that data-driven decision-making is crucial for businesses to stay competitive in today's market.

    • For example, in my...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Be good at the language you are applying for
Round 1 - Technical 

(1 Question)

  • Q1. Basics .net , c#, sql
Round 2 - Technical 

(1 Question)

  • Q1. Current Project Details, Roles and some technical questions too
Round 3 - HR 

(1 Question)

  • Q1. Package Discussion and Other basic details

Interview Preparation Tips

Interview preparation tips for other job seekers - Make sure your basics are strong and should be confident to explain about the current project and its technical details.
Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Technical 

(2 Questions)

  • Q1. Describe Life cycle in react
  • Ans. 

    React has three main phases in its lifecycle: mounting, updating, and unmounting.

    • Mounting: when a component is created and inserted into the DOM

    • Updating: when a component is updated due to changes in props or state

    • Unmounting: when a component is removed from the DOM

    • Lifecycle methods can be used to perform actions at each phase, such as componentDidMount() or componentWillUnmount()

    • React also has error handling methods,

  • Answered by AI
  • Q2. Explain strict mode in javascript and it's use
  • Ans. 

    Strict mode is a way to write secure and optimized JavaScript code.

    • Enables catching of silent errors

    • Disallows duplicate property names or parameters

    • Prevents use of undeclared variables

    • Makes `eval()` safer to use

    • Throws errors on invalid usage of `this` keyword

  • Answered by AI
Round 3 - Assignment 

CURD operations along with implementation of a mock UI

Interview Preparation Tips

Interview preparation tips for other job seekers - They are doing good job. If possible try to send a rejection mail along with the reason if candidate is not selected.

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Don’t add your photo or details such as gender, age, and address in your resume. These details do not add any value.
View all tips
Round 2 - Technical 

(1 Question)

  • Q1. Tell about Oops concepts
  • Ans. 

    OOPs concepts are fundamental principles in object-oriented programming, including inheritance, encapsulation, polymorphism, and abstraction.

    • Inheritance: Allows a class to inherit properties and behavior from another class.

    • Encapsulation: Bundling data and methods that operate on the data into a single unit.

    • Polymorphism: Ability to present the same interface for different data types.

    • Abstraction: Hiding the complex imple...

  • Answered by AI
Round 3 - Technical 

(1 Question)

  • Q1. Will ask coding related
Round 4 - HR 

(1 Question)

  • Q1. What is Expected salary
Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. String palindrome
  • Q2. Find all anagrams in a string
  • Ans. 

    Find all anagrams in a string

    • Create a hashmap to store the frequency of characters in the input string

    • Iterate through the input string and check if the frequency of characters matches the hashmap for each substring of the same length

    • Store the substrings that are anagrams in an array and return it

  • Answered by AI

Skills evaluated in this interview

Interview experience
1
Bad
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Selected Selected

I appeared for an interview in Jul 2024.

Round 1 - Coding Test 

Create an API using Notepad to check if a string is a palindrome or not.

Round 2 - One-on-one 

(1 Question)

  • Q1. Solid principal

Interview Preparation Tips

Interview preparation tips for other job seekers - Don't join worst company

ZIGRAM Interview FAQs

How to prepare for ZIGRAM Data Specialist interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at ZIGRAM. The most common topics and skills that interviewers at ZIGRAM expect are Data Science, Effective Communication, Machine Learning, NLP and Operational Excellence.
What are the top questions asked in ZIGRAM Data Specialist interview?

Some of the top questions asked at the ZIGRAM Data Specialist interview -

  1. Start to End approach for regression prob...read more
  2. Explain basic statics to non-tech per...read more
  3. Technical Discuss on the last ML project I worked ...read more

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ZIGRAM Data Specialist Salary
based on 6 salaries
₹3 L/yr - ₹7 L/yr
37% less than the average Data Specialist Salary in India
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