70+ NielsenIQ Interview Questions and Answers

I handled the latest customer disputes by listening to their concerns and finding a mutually beneficial solution.

• Listened to customer concerns and empathized with their situation

• Reviewed relevant policies and procedures to determine appropriate course of action

• Communicated clearly and professionally with customers to find a mutually beneficial solution

• Followed up with customers to ensure satisfaction and prevent future disputes

Yes, I have used Power BI for various types of visualization including bar charts, line charts, pie charts, and maps.

• I have experience creating bar charts to visualize sales data over time.

• I have used line charts to show trends in customer engagement metrics.

• I have utilized pie charts to display market share data.

• I have incorporated maps to visualize geographic distribution of sales.

Scan data refers to the information collected from scanning barcodes or QR codes, typically used in retail to track sales and inventory.

• Scan data is collected by scanning barcodes or QR codes on products.

• It is commonly used in retail to track sales, inventory levels, and pricing.

• Scan data can provide valuable insights into consumer behavior and preferences.

• Examples of scan data systems include point-of-sale (POS) systems and inventory management software.

Panel data is a type of longitudinal data that involves observations on multiple subjects over multiple time periods.

• Panel data is also known as longitudinal data or cross-sectional time series data.

• It allows for the analysis of both individual and time effects.

• Examples include tracking the same group of individuals over time to study changes in their behavior or characteristics.

• Panel data is commonly used in economics, sociology, and political science research.

It is impossible to accurately determine the number of cups of tea consumed in Delhi for a week without proper data.

• There is no official data available on the exact number of cups of tea consumed in Delhi for a week.

• The number of cups of tea consumed in Delhi for a week varies depending on various factors such as weather, season, and individual preferences.

• It is estimated that Delhi consumes a significant amount of tea due to its cultural and historical significance.

• Factors s...read more

Nielsen is a global measurement and data analytics company that provides insights into consumer behavior.

• Nielsen is known for its TV ratings system, which measures viewership for television programs.

• They also provide data on consumer purchasing habits and trends for various industries.

• Nielsen operates in over 100 countries and has a wide range of services including market research, audience measurement, and advertising effectiveness.

• The company was founded in 1923 by Arthur C...read more

Yes, I have managed a large infrastructure setup in my previous role.

• Managed a data center with hundreds of servers and networking equipment

• Implemented scalable solutions to handle increasing traffic and storage demands

• Coordinated with cross-functional teams to ensure smooth operation and maintenance

• Utilized monitoring tools to proactively identify and address issues

• Upgraded hardware and software components to improve performance and security

DAX is a formula language used in Power BI and Excel for data analysis, while filters are used to narrow down data based on specific criteria.

• DAX is a formula language used in Power BI and Excel for data analysis

• Filters are used to narrow down data based on specific criteria

• DAX can be used to create calculated columns and measures, while filters can be applied to visuals to show specific data

Nielsen's clients are primarily companies in the media and consumer goods industries.

• Media companies such as NBCUniversal, CBS, and ESPN

• Consumer goods companies such as Procter & Gamble, Coca-Cola, and Nestle

• Retailers such as Walmart and Target

• Advertising agencies

• Government organizations

FMCG products are fast-moving consumer goods that are sold quickly at relatively low cost.

• Food and beverages (e.g. snacks, soft drinks)

• Personal care products (e.g. shampoo, soap)

• Household products (e.g. cleaning supplies, paper products)

• Cosmetics and toiletries (e.g. makeup, skincare products)

• Over-the-counter medications (e.g. pain relievers, cold medicine)

Remove duplicates from a given list of numbers

• Create a new list to store unique elements

• Iterate through the given list and add elements to the new list if they are not already present

• Return the new list as the result

I have handled various P1 incidents including server crashes, network outages, and critical software bugs.

• Server crashes

• Network outages

• Critical software bugs

Yes, I know Python.

• I have experience working with Python for data processing and analysis.

• I am familiar with Python libraries such as Pandas and NumPy.

• I have written scripts and programs in Python to automate data processing tasks.

• I can use Python to manipulate and analyze large datasets efficiently.

• I am comfortable working with Python's syntax and data structures.

The expected CTC is negotiable based on the candidate's experience, skills, and the company's budget.

• CTC depends on the candidate's level of experience and skills.

• Negotiation is possible based on the company's budget.

• Market research can provide insights into industry standards for CTC.

• Consider benefits and perks in addition to the base salary.

Coding for development/automation involves writing efficient and scalable code to automate tasks and improve processes.

• Understand the problem and identify the best approach for automation

• Write clean and modular code that is easy to maintain and update

• Use appropriate tools and frameworks to streamline development

• Test thoroughly to ensure reliability and accuracy

• Continuously optimize and improve the automation process

Nielsen is a global measurement and data analytics company that provides insights into consumer behavior and media consumption.

• Nielsen measures and analyzes consumer behavior and media consumption across various platforms

• They provide data and insights to help companies make informed decisions about their marketing and advertising strategies

• Nielsen also offers services related to audience measurement, advertising effectiveness, and product innovation

• Their clients include media...read more

To reduce stress, I would engage in activities such as exercise, meditation, and spending time with loved ones.

• Engage in regular exercise to release endorphins and reduce stress levels.

• Practice meditation or deep breathing exercises to promote relaxation and calmness.

• Spend quality time with loved ones, engaging in activities that bring joy and laughter.

• Take breaks and engage in hobbies or activities that provide a sense of fulfillment and relaxation.

• Maintain a healthy work-li...read more

To create an alphanumeric string of a given length, we can use a combination of random letters and numbers.

• Determine the length of the string required

• Create a list of all possible alphanumeric characters

• Randomly select characters from the list and append them to the string until the desired length is reached

VMware scope of work includes virtualization, cloud computing, networking, and security solutions.

• Virtualization of servers, desktops, applications, and storage

• Cloud computing services and solutions

• Networking and security solutions for virtualized environments

• Management and automation tools for virtual infrastructure

• Consulting and training services for VMware products

• Examples: VMware vSphere, VMware NSX, VMware Cloud Foundation

The workflow process in Citrix involves accessing applications and data remotely through virtualization technology.

• Users access Citrix Workspace to connect to virtual desktops or applications

• Applications and data are hosted on servers in a data center

• Citrix Receiver or Citrix Workspace app is used to access resources remotely

• Data is securely transmitted over the network using Citrix protocols

Data science focuses on extracting insights and building models from data, while data analytics focuses on analyzing and interpreting data to make informed decisions.

• Data science involves using statistical techniques and machine learning algorithms to extract insights and patterns from large datasets.

• Data analytics involves analyzing data to understand trends, patterns, and correlations to support decision-making.

• Data science is more focused on predictive modeling and buildin...read more

NIELSENIQ is a software quality measurement tool used to evaluate the quality of software products.

• NIELSENIQ measures software quality based on various factors such as maintainability, reliability, and efficiency.

• It provides a score that indicates the overall quality of the software product.

• NIELSENIQ can be used to identify areas of improvement in software development processes.

• It is commonly used in software engineering and development industries.

• NIELSENIQ is developed by Ni...read more

Filter in Power BI is used to narrow down the data displayed in visuals based on specific criteria.

• Filters can be applied to individual visuals or to the entire report

• Filters can be based on specific values, ranges, or conditions

• Examples include filtering sales data by region, filtering dates, or filtering by product category

GAAP & SOX Audit are accounting standards that ensure financial reporting accuracy and prevent fraud.

• GAAP (Generally Accepted Accounting Principles) is a set of accounting standards that companies must follow when preparing financial statements.

• SOX (Sarbanes-Oxley Act) is a law that requires companies to establish internal controls and procedures to prevent financial fraud.

• SOX also requires companies to have an external audit of their financial statements to ensure compliance...read more

NielsenIQ is a global measurement and data analytics company that provides insights into consumer behavior and market trends.

• NielsenIQ offers a range of services including market research, media measurement, and consumer behavior analysis.

• The company uses advanced data analytics and technology to provide clients with actionable insights.

• NielsenIQ operates in over 100 countries and works with leading brands across various industries.

• Some of the company's popular products inclu...read more

Print all palindromes of a string

• Iterate through all substrings of the input string

• Check if each substring is a palindrome by comparing it with its reverse

• Store palindromes in an array and return it

Design an ecommerce portal at high and low levels

• High level design includes defining the overall architecture and components of the system

• Low level design involves defining the details of each component and how they interact

• Consider factors such as scalability, security, and user experience

• Use tools such as UML diagrams and flowcharts to visualize the design

• Example components: product catalog, shopping cart, payment gateway, user authentication

• Example interactions: user adds ...read more

Iterating effectively in a dataset involves understanding the data structure, setting clear objectives, using appropriate tools, and analyzing results.

• Understand the data structure and variables before starting the iteration process.

• Set clear objectives and define the criteria for success to guide the iteration.

• Use appropriate tools such as programming languages or statistical software to efficiently iterate through the dataset.

• Analyze the results of each iteration to make in...read more

Types of methodologies include qualitative, quantitative, mixed methods, and action research.

• Qualitative methodology focuses on understanding human behavior and experiences through methods like interviews and observations.

• Quantitative methodology involves collecting numerical data and analyzing it statistically.

• Mixed methods combine qualitative and quantitative approaches to provide a comprehensive understanding of a research topic.

• Action research involves actively engaging w...read more

Key components of SOPs include purpose, scope, responsibilities, procedures, and revisions.

• Purpose: Clearly defined objective or goal of the SOP.

• Scope: Specific areas or processes that the SOP applies to.

• Responsibilities: Roles and duties of individuals involved in following the SOP.

• Procedures: Step-by-step instructions on how to carry out tasks or processes.

• Revisions: Process for updating and maintaining the SOP to reflect changes.

• Examples: SOP for data entry, SOP for labora...read more

Yes, I have experience in sentiment analysis.

• I have worked on sentiment analysis projects using natural language processing techniques.

• I am familiar with tools like NLTK, TextBlob, and VADER for sentiment analysis.

• I have experience in analyzing social media data to determine sentiment towards a brand or product.

Riddle: You have 9 things of the same color. Find on Google.

• Search for '9 things same color' on Google

• Look for riddles or puzzles related to 9 things of the same color

• Consider using logical reasoning and deduction to solve the riddle

Program to check if string is number

• Use built-in functions like isdigit() or isnumeric()

• Handle negative numbers and decimal points separately

• Consider edge cases like leading/trailing spaces and exponential notation

Accounts Payable process involves receiving, verifying, and processing invoices for payment.

• Receive invoices from vendors

• Verify the accuracy of the invoice details

• Match the invoice with purchase order and goods receipt

• Code the invoice with appropriate account and cost center

• Obtain approval for payment

• Process payment and update the accounting records

• Maintain vendor records and resolve any discrepancies

Swap two strings without using third

• Use XOR operator

• Use addition and subtraction

• Use multiplication and division

Revenue Accruals are the recognition of revenue earned but not yet received or invoiced.

• Revenue that has been earned but not yet invoiced is recorded as a revenue accrual.

• Revenue accruals are used to match revenue with the period in which it was earned.

• Revenue accruals are adjusted at the end of each accounting period to reflect the actual revenue earned.

• Examples of revenue accruals include unbilled services, goods shipped but not yet invoiced, and revenue from long-term cont...read more

Program to toggle string

• Create an empty string variable

• Loop through each character in the input string

• If the character is uppercase, convert it to lowercase and add to the new string

• If the character is lowercase, convert it to uppercase and add to the new string

• Return the new string

Use MySQL query with ORDER BY and LIMIT to find employee with 2nd highest salary.

• Use ORDER BY salary DESC to sort salaries in descending order

• Use LIMIT 1,1 to skip the highest salary and get the second highest salary

Merge sort is a divide and conquer algorithm that recursively splits an array into halves, sorts them, and then merges them back together.

• Split the array into two halves

• Recursively sort each half

• Merge the sorted halves back together

Architecture development process involves designing, planning, and implementing the structure of a system or software.

• Identifying requirements and constraints

• Creating architectural design

• Evaluating design choices

• Implementing the architecture

• Testing and validating the architecture

Revenue recognition is the process of identifying and recording revenue earned by a company.

• Revenue is recognized when it is earned and realizable

• Revenue is earned when goods or services are delivered

• Revenue is realizable when payment is expected

• Revenue is recognized at the fair value of the consideration received or receivable

• Revenue recognition principles vary by industry and accounting standards

Stochastic Gradient Descent is an optimization algorithm used to minimize the cost function in machine learning by updating parameters iteratively.

• SGD is a variant of Gradient Descent that updates the model's parameters using a single training example at a time.

• It is computationally efficient and is commonly used in large-scale machine learning tasks.

• SGD is suitable for online learning and can handle large datasets efficiently.

• Example: Training a neural network using SGD invo...read more

Designing an ecommerce platform involves creating a scalable and secure system to handle transactions and user data.

• Consider the architecture of the system, including front-end, back-end, and database layers.

• Ensure the platform can handle high traffic and large amounts of data.

• Implement security measures to protect user data and prevent fraud.

• Integrate with payment gateways and shipping providers.

• Provide a user-friendly interface for browsing and purchasing products.

• Implement...read more

Accruals refer to expenses that have been incurred but not yet paid, or revenue that has been earned but not yet received.

• Accruals are used to match expenses with revenues in the same accounting period.

• They are recorded as adjusting entries in the financial statements.

• Examples include accrued salaries, interest payable, and accounts receivable.

• Accruals help provide a more accurate representation of a company's financial position and performance.

Primary research involves collecting data directly from original sources.

• Involves collecting data directly from original sources

• Can include surveys, interviews, observations, and experiments

• Helps in obtaining specific and targeted information

• Often more time-consuming and expensive compared to secondary research

Segment reporting is the practice of breaking down a company's financial information into different business segments.

• Segment reporting helps investors and analysts understand the performance of different parts of a company.

• Companies typically report segment information based on factors such as geography, product lines, or customer types.

• Segment reporting is required by accounting standards to provide transparency and accountability.

• For example, a multinational corporation ma...read more

Yes

• Store space management involves optimizing the layout and organization of a retail space to maximize efficiency and profitability.

• It includes tasks such as determining the placement of products, fixtures, and signage, analyzing customer flow and behavior, and implementing strategies to improve space utilization.

• Examples of projects in store space management could include redesigning the layout of a store to improve product visibility and accessibility, implementing a plano...read more

Stored procedure is a precompiled collection of SQL statements that can be executed by calling the procedure name.

• Stored procedures are used to encapsulate and group SQL code for reuse and performance optimization.

• They can accept input parameters and return output parameters.

• Stored procedures can be called from applications or other stored procedures.

• They are stored in the database and can be executed multiple times without recompilation.

OOPS (Object-Oriented Programming) is a programming paradigm based on the concept of objects, which can contain data and code.

• OOPS focuses on creating objects that interact with each other to solve a problem

• It involves concepts like classes, objects, inheritance, polymorphism, and encapsulation

• Example: Inheritance allows a class to inherit properties and behavior from another class

Stay calm, listen actively, empathize, apologize, offer solutions, follow up.

• Stay calm and composed

• Listen actively to understand their concerns

• Empathize with their situation

• Apologize for any inconvenience caused

• Offer solutions to address their issues

• Follow up to ensure their satisfaction

• Example: 'I understand that you are frustrated, let's work together to find a solution.'

Find duplicates in an array of strings.

• Iterate through the array and use a hash set to keep track of seen elements.

• If an element is already in the hash set, it is a duplicate.

• Example: ['apple', 'banana', 'apple', 'orange'] should return 'apple' as a duplicate.

The reverse of a sentence is the words in the sentence in reverse order.

• Split the sentence into words

• Reverse the order of the words

• Join the words back together

I have extensive experience with the Spaceman product.

• I have been using the Spaceman product for the past five years.

• During my time as a manager at XYZ Company, I successfully implemented the Spaceman product to streamline our inventory management process.

• I have attended multiple training sessions and workshops to enhance my knowledge and skills in using the Spaceman product.

• I have also trained and mentored my team members on how to effectively utilize the Spaceman product.

My expected CTC is negotiable based on the role, responsibilities, and benefits offered.

• My expected CTC is based on industry standards and my level of experience.

• I am open to discussing the salary range during the interview process.

• I am looking for a competitive salary package that aligns with my skills and qualifications.

Materiality refers to the significance or importance of information in relation to a decision or financial statement.

• Materiality is a concept used in accounting and auditing to determine the relevance of information to users of financial statements.

• It involves assessing whether the information could influence the decisions of users, such as investors or creditors.

• Materiality is subjective and depends on factors like the size of the item or error relative to the overall financ...read more

The 5 steps revenue recognition model outlines the process for recognizing revenue from contracts with customers.

• Identify the contract with the customer

• Identify the performance obligations in the contract

• Determine the transaction price

• Allocate the transaction price to the performance obligations

• Recognize revenue as the performance obligations are satisfied

Optimizing PySpark involves tuning configurations, using efficient transformations/actions, and leveraging caching.

• Tune PySpark configurations for optimal performance (e.g. adjusting memory settings, parallelism)

• Use efficient transformations/actions to minimize unnecessary data shuffling (e.g. using narrow transformations like map instead of wide transformations like groupByKey)

• Leverage caching to persist intermediate results in memory for faster access

To cleanup disk, you can use disk cleanup tools, delete unnecessary files, uninstall unused programs, and empty the recycle bin.

• Use disk cleanup tools like Disk Cleanup in Windows or CleanMyMac in macOS to remove temporary files and other unnecessary data

• Delete unnecessary files and folders that are taking up space on the disk

• Uninstall unused programs or applications to free up disk space

• Empty the recycle bin to permanently delete files and free up space

• Consider moving large ...read more

To improve SGD, consider adjusting learning rate, using momentum, implementing learning rate schedules, and adding regularization techniques.

• Adjust learning rate: Experiment with different learning rates to find the optimal value for faster convergence.

• Use momentum: Incorporate momentum to accelerate SGD in the relevant direction and dampen oscillations.

• Implement learning rate schedules: Decay the learning rate over time to prevent overshooting the minimum.

• Add regularization ...read more

A framework is a set of guidelines, standards, and tools used to develop and maintain software applications.

• A framework provides a structure for organizing code and building applications

• It includes pre-written code libraries, modules, and functions that can be reused

• Frameworks can be specific to a programming language or technology

• Examples include Selenium for web testing, Robot Framework for automation testing, and Django for web development

Sev1 issues should be addressed immediately and with high priority to minimize impact on users.

• Acknowledge the Sev1 issue and communicate it to the relevant stakeholders

• Gather all necessary information to understand the root cause of the issue

• Implement a temporary workaround if possible to mitigate the impact on users

• Engage necessary resources to resolve the Sev1 issue as quickly as possible

• Provide regular updates to stakeholders until the Sev1 issue is fully resolved

Joins are used in databases to combine rows from two or more tables based on a related column between them.

• Joins are used to retrieve data from multiple tables based on a related column between them

• Common types of joins 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 ta...read more

List is an ordered collection of elements with duplicates allowed, while set is an unordered collection of unique elements.

• List maintains the order of elements, while set does not guarantee any specific order.

• List allows duplicate elements, while set does not allow duplicates.

• Example: List - [1, 2, 3, 1], Set - {1, 2, 3}

A branch in git is a separate line of development that allows you to work on features or fixes without affecting the main codebase.

• Branches allow for parallel development

• They can be created, switched between, merged, and deleted

• Common branches include master, develop, feature branches, and release branches

Consumers are individuals who use products or services, while customers are individuals who purchase products or services.

• Consumers can be anyone who uses a product or service, even if they did not purchase it themselves.

• Customers are individuals who have purchased a product or service, making them a paying customer.

• Consumers can influence purchasing decisions, even if they are not the ones making the purchase.

• Customers have a direct transactional relationship with the compan...read more

Qualitative research focuses on understanding behaviors, motivations, and opinions, while quantitative research focuses on numerical data and statistical analysis.

• Qualitative research involves collecting non-numerical data such as interviews, observations, and open-ended surveys.

• Quantitative research involves collecting numerical data through surveys, experiments, and statistical analysis.

• Qualitative research is exploratory and helps in understanding complex phenomena, while ...read more

Set theory is a branch of mathematical logic that studies sets, which are collections of objects.

• Set theory deals with the study of sets and their properties.

• Sets can be defined by listing their elements or by using set-builder notation.

• Operations on sets include union, intersection, and complement.

• Venn diagrams are often used to visualize relationships between sets.

• Set theory forms the foundation of many branches of mathematics, including calculus and probability theory.

I am a data scientist with a background in statistics and machine learning, passionate about solving complex problems using data-driven approaches.

• I have a Master's degree in Data Science from XYZ University.

• I have experience working with Python, R, and SQL for data analysis and modeling.

• I have worked on projects involving predictive analytics, natural language processing, and computer vision.

• I am proficient in data visualization tools like Tableau and Power BI.

• I have strong ...read more

Market research helps in understanding consumer behavior, identifying trends, and making informed business decisions.

• Market research provides valuable insights into consumer preferences and behavior.

• It helps in identifying market trends and opportunities for growth.

• Allows businesses to make informed decisions based on data rather than assumptions.

• Helps in understanding competitors and positioning products/services effectively.

• Enables businesses to tailor their marketing strat...read more

P2P cycle refers to the Procure-to-Pay cycle, which is the process of obtaining and paying for goods and services.

• P2P cycle starts with the requisition of goods or services by the buyer.

• Next, the buyer selects a vendor and creates a purchase order.

• Upon receiving the goods or services, the buyer verifies the receipt and approves the invoice for payment.

• Finally, the buyer processes the payment to the vendor.

• Examples: Requisition, Purchase Order, Receipt Verification, Invoice Ap...read more

SOLID principles are a set of five design principles in object-oriented programming to make software designs more understandable, flexible, and maintainable.

• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Objects of a superclass should be replaceable with objects of its subclasses without affecting the func...read more

Ticketing system design involves creating a platform for users to submit, track, and resolve issues or requests.

• Design a user-friendly interface for submitting tickets

• Implement a system for assigning tickets to appropriate teams or individuals

• Include features for tracking ticket status and communication with users

• Consider scalability and performance of the system

• Integrate with other tools or systems for seamless workflow

• Examples: Zendesk, Jira, ServiceNow

Async/Await simplifies asynchronous programming by allowing code to be written in a synchronous style.

• Async/Await is a feature in JavaScript that allows asynchronous code to be written in a synchronous manner.

• It is built on top of Promises and provides a cleaner syntax for handling asynchronous operations.

• Async functions return a Promise, which allows them to be used with the 'await' keyword to pause execution until the Promise is resolved.

• Using Async/Await can make code easi...read more

Window functions in SQL are used to perform calculations across a set of table rows related to the current row.

• Window functions are used to calculate values based on a specific subset of rows within a table.

• They allow for ranking, aggregation, and other calculations without grouping the rows.

• Examples of window functions include ROW_NUMBER(), RANK(), and SUM() OVER().

Delta Lake is an open-source storage layer that brings ACID transactions to Apache Spark and big data workloads.

• Delta Lake is built on top of Apache Spark and provides ACID transactions for big data processing.

• It allows for schema enforcement and evolution, data versioning, and time travel queries.

• Delta Lake is compatible with popular data science and machine learning libraries like TensorFlow and PyTorch.

Design a REST API for a backend Java developer

• Define the resources and endpoints

• Use HTTP methods like GET, POST, PUT, DELETE

• Implement authentication and authorization

• Use JSON for data exchange

• Include error handling and status codes