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Nielsen Interview Questions, Process, and Tips

Updated 24 Feb 2025

Top Nielsen Interview Questions and Answers

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117 interviews found

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
-

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

Round 1 - One-on-one 

(4 Questions)

  • Q1. SQL: Find the nth highest salary of employee?
  • Ans. 

    Use SQL query with ORDER BY and LIMIT to find the nth highest salary of an employee.

    • Use ORDER BY clause to sort salaries in descending order

    • Use LIMIT to specify the nth highest salary

    • Example: SELECT salary FROM employees ORDER BY salary DESC LIMIT n-1, 1

  • Answered by AI
  • Q2. SQL: Types of Joins in SQL?
  • Ans. 

    Types of joins in SQL include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

    • INNER JOIN: Returns rows when there is at least one match in both tables.

    • LEFT JOIN: Returns all rows from the left table and the matched rows from the right table.

    • RIGHT JOIN: Returns all rows from the right table and the matched rows from the left table.

    • FULL JOIN: Returns rows when there is a match in one of the tables.

  • Answered by AI
  • Q3. Algorithm: BinarySearch algorithm using Recursion, explanation and implementation.
  • Ans. 

    BinarySearch algorithm using Recursion finds the target element in a sorted array by dividing the array in half at each step.

    • Divide the array in half and compare the target element with the middle element

    • If the target element is smaller, search the left half recursively

    • If the target element is larger, search the right half recursively

    • Repeat until the target element is found or the array is empty

  • Answered by AI
  • Q4. Given a string s and t find that s is a subsequence string in t or not?
  • Ans. 

    Check if string s is a subsequence of string t.

    • Iterate through both strings using two pointers.

    • Compare characters of s and t, moving pointer in t only if characters match.

    • If all characters of s are found in t in order, return true.

    • Example: s = 'abc', t = 'ahbgdc' => true

  • Answered by AI

Skills evaluated in this interview

Senior Software Developer Interview Questions asked at other Companies

Q1. Intersection of Linked List Problem You are provided with two singly linked lists containing integers, where both lists converge at some node belonging to a third linked list. Your task is to determine the data of the node at which they sta... read more
Add answer
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - One-on-one 

(1 Question)

  • Q1. Basic Form Validation on React Js but on a platform which doesn't have syntax highlighting. Expected best coding standards to be followed.
Round 2 - One-on-one 

(1 Question)

  • Q1. React Js and JavaScript questions
Round 3 - Behavioral 

(1 Question)

  • Q1. Technical questions based on situations.

Interview Preparation Tips

Interview preparation tips for other job seekers - Keep your foundations strong on js, react js.

Software Engineer Interview Questions asked at other Companies

Q1. Bridge and torch problem : Four people come to a river in the night. There is a narrow bridge, but it can only hold two people at a time. They have one torch and, because it's night, the torch has to be used when crossing the bridge. Person... read more
View answer (169)
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Selected Selected

I applied via Referral and was interviewed in May 2024. There were 3 interview rounds.

Round 1 - Coding Test 

I was asked to write SQL queries for 3rd highest salary of the employee, some name filtering, group by tasks.
Python code to find the index of the maximum number without using numpy.

Round 2 - One-on-one 

(1 Question)

  • Q1. Explain the Project undertaken during the research and follow-up questions
Round 3 - Technical 

(1 Question)

  • Q1. Write pandas query to separate the names as first and last name from the full name. Drop the duplicate columns and also the missing values. Write output for the Python code. Write SQL query to retrieve t...
  • Ans. 

    Answering questions related to data science concepts and techniques.

    • Recall is the ratio of correctly predicted positive observations to the total actual positives. Precision is the ratio of correctly predicted positive observations to the total predicted positives.

    • To reduce variance in an ensemble model, techniques like bagging, boosting, and stacking can be used. Bagging involves training multiple models on different ...

  • Answered by AI

Interview Preparation Tips

Topics to prepare for Nielsen Data Scientist interview:
  • Python
  • Pandas
  • SQL
  • Machine Learning
Interview preparation tips for other job seekers - Have your basics strong.

Skills evaluated in this interview

Data Scientist Interview Questions asked at other Companies

Q1. Special Sum of ArrayYou have been given an array/list ‘arr’ of length ‘N’, which contains single digit elements at every index. Your task is to return the sum of all elements of the array. But the final sum should also be a single digit. To... read more
View answer (2)
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Approached by Company and was interviewed in Aug 2024. There was 1 interview round.

Round 1 - One-on-one 

(2 Questions)

  • Q1. Shallow copy and deep copy
  • Q2. What is Pure component
  • Ans. 

    A Pure component is a component in React that does not have any state or lifecycle methods, resulting in improved performance.

    • Pure components are used to prevent unnecessary re-renders in React applications.

    • Pure components implement shouldComponentUpdate method with shallow comparison of props and state.

    • Examples of Pure components include functional components and class components that extend PureComponent class.

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Improve the knowledge of javascript basics and for react developer role, focus on coding side.

Software Developer Interview Questions asked at other Companies

Q1. Maximum Subarray SumGiven an array of numbers, find the maximum sum of any contiguous subarray of the array. For example, given the array [34, -50, 42, 14, -5, 86], the maximum sum would be 137, since we would take elements 42, 14, -5, and ... read more
View answer (39)

Nielsen interview questions for popular designations

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 (6)

 Data Engineer

 (5)

 Data Scientist

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 Project Manager

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 Senior Software Engineer

 (4)

 Data Analyst

 (3)

Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Data modeling on website data
  • Q2. Spark performance tuning

Senior Data Engineer Interview Questions asked at other Companies

Q1. Write a query to get the customer with the highest total order value for each year, month. [Note: Order table is different and Customer table is different. Order_ID and Customer_ID are the PK of the table with Oid from Customer table being ... read more
View answer (2)

Get interview-ready with Top Nielsen Interview Questions

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
No response

I applied via LinkedIn and was interviewed in Sep 2024. There were 3 interview rounds.

Round 1 - HR 

(3 Questions)

  • Q1. Asked some technical questions about .net and asp .net MVC
  • Q2. Famil background
  • Q3. About my project and team
Round 2 - Aptitude Test 

2 online test where given where I need to complete 50 MCQ (tech) in 20min and 30MCQ in 12min.

Round 3 - Group Discussion 

Situtation based question and technical knowledge and skills

Full Stack Developer Interview Questions asked at other Companies

Q1. Query and Matrix Problem Statement You are given a binary matrix with 'M' rows and 'N' columns, initially consisting of all 0s. You will receive 'Q' queries, which can be of four types: Query 1: 1 R indexQuery 2: 1 C indexQuery 3: 2 R index... read more
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Jobs at Nielsen

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Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Barraiser 

(2 Questions)

  • Q1. Find avg user login time based on clickstream data if session is applicable for 30 mins in spark
  • Ans. 

    Calculate average user login time based on clickstream data with 30 min session in Spark

    • Filter clickstream data to include only login events

    • Calculate session duration by grouping events within 30 min window

    • Calculate average session duration per user

  • Answered by AI
  • Q2. Design a data pipeline for e-commerce website.
  • Ans. 

    Design a data pipeline for an e-commerce website.

    • Extract data from website databases, such as product information, customer details, and order history.

    • Transform the data by cleaning, filtering, and aggregating it to make it usable for analysis.

    • Load the processed data into a data warehouse or data lake for storage and further analysis.

    • Implement data pipelines using tools like Apache Kafka, Apache Spark, or AWS Glue.

    • Moni...

  • Answered by AI

Skills evaluated in this interview

Senior Data Engineer Interview Questions asked at other Companies

Q1. Write a query to get the customer with the highest total order value for each year, month. [Note: Order table is different and Customer table is different. Order_ID and Customer_ID are the PK of the table with Oid from Customer table being ... read more
View answer (2)
Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

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

Round 1 - Technical 

(2 Questions)

  • Q1. SQL and python question
  • Q2. Design ETL process and ensure Data Quality
  • Ans. 

    Design ETL process to ensure high data quality by implementing data validation, cleansing, and transformation steps.

    • Identify data sources and define data extraction methods

    • Implement data validation checks to ensure accuracy and completeness

    • Perform data cleansing to remove duplicates, errors, and inconsistencies

    • Transform data into a consistent format for analysis and reporting

    • Utilize tools like Apache NiFi, Talend, or I

  • Answered by AI

Skills evaluated in this interview

Lead Data Engineer Interview Questions asked at other Companies

Q1. Given a DataFrame df with columns 'A', 'B','C' how would you group the data by the values in column 'A' and calculate the mean of column 'B' for each group, while also summing the values in column 'C' ?
View answer (1)
Interview experience
1
Bad
Difficulty level
Easy
Process Duration
4-6 weeks
Result
No response

I applied via Recruitment Consulltant and was interviewed in Apr 2024. There were 3 interview rounds.

Round 1 - Technical 

(1 Question)

  • Q1. Microservices, monolithic, micro front end architecture
Round 2 - Technical 

(1 Question)

  • Q1. High level discussion
Round 3 - Technical 

(1 Question)

  • Q1. React coding question on ref. Javascript code questions ex palindrome

Interview Preparation Tips

Interview preparation tips for other job seekers - Please don't waste time with this company they are not serious for good candidates. After collecting all documents and sharing offer email they didn't share the offer letter.
On reaching out they will provide no response.

React Js Frontend Developer Interview Questions asked at other Companies

Q1. 1. What is difference between abstract class and interface ?
View answer (1)
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via LinkedIn and was interviewed in May 2024. There were 2 interview rounds.

Round 1 - HR 

(1 Question)

  • Q1. About past experience
Round 2 - Technical 

(3 Questions)

  • Q1. About experience
  • Q2. About linux and ansible and coding
  • Q3. Write a code to convert no into string
  • Ans. 

    Code to convert number into string

    • Use a built-in function like str() in Python to convert a number into a string

    • In JavaScript, you can use the toString() method to convert a number into a string

    • In Java, you can use Integer.toString() to convert an integer into a string

  • Answered by AI

Skills evaluated in this interview

Devops Engineer Interview Questions asked at other Companies

Q1. Reverse the StringYou are given a string 'STR'. The string contains [a-z] [A-Z] [0-9] [special characters]. You have to find the reverse of the string. For example: If the given string is: STR = "abcde". You have to print the string "edcba... read more
View answer (3)

Nielsen Interview FAQs

How many rounds are there in Nielsen interview?
Nielsen interview process usually has 2-3 rounds. The most common rounds in the Nielsen interview process are Technical, One-on-one Round and Aptitude Test.
How to prepare for Nielsen 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 Nielsen. The most common topics and skills that interviewers at Nielsen expect are Python, SQL, Social Media Marketing, Communication Skills and Computer Science.
What are the top questions asked in Nielsen interview?

Some of the top questions asked at the Nielsen interview -

  1. If one set of bat and ball together cost Rs.110 , the bat costs Rs. 100 more th...read more
  2. Given 3 days to calculate the number of Paan and Beedi shops in Mumbai, what wi...read more
  3. What is the difference between market research and marketing resear...read more
How long is the Nielsen interview process?

The duration of Nielsen interview process can vary, but typically it takes about less than 2 weeks to complete.

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Nielsen Interview Process

based on 100 interviews

Interview experience

3.8
  
Good
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Nielsen Reviews and Ratings

based on 919 reviews

3.7/5

Rating in categories

3.3

Skill development

3.8

Work-life balance

3.3

Salary

3.4

Job security

3.7

Company culture

2.9

Promotions

3.4

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