Nielsen Interview Questions and Answers

Q1. Trail balance Corp chat
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Q2. Team handling situations based question
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Q1. What does S/4 HANA implementation involve?
Ans. 
S/4 HANA implementation involves migrating business processes to SAP's latest ERP system for improved efficiency and real-time analytics.
• Data migration from legacy systems to S/4 HANA

• Business process reengineering to align with S/4 HANA functionalities

• Customization and configuration of S/4 HANA modules

• Training employees on using the new system effectively

• Testing and validation of the implemented solution
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Q2. What is the process for setting up a master data set?
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Setting up a master data set involves identifying data sources, cleansing data, defining data attributes, and establishing data governance.
• Identify all relevant data sources that will be included in the master data set

• Cleanse the data to ensure accuracy and consistency

• Define data attributes such as data types, formats, and relationships

• Establish data governance policies and procedures to maintain data quality and integ...read more
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Q1. Royalty process
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Q2. Intercompany pricing process
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Q1. Team handing Experience and salary discussion
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Basic .net concept question and 2 leetcode medium question.
1) find a target element within a rotated search array (complexity < 0(N))

Q1. How would you handle scenerios where if you have 1000 request comming and you can handle 10 request at max
Ans. 
Implement a queue system to manage requests, ensuring efficient processing and user feedback.
• Use a queue to store incoming requests, processing them in batches of 10.

• Implement rate limiting to control the flow of requests and prevent overload.

• Provide feedback to users about their request status, e.g., 'Your request is in queue.'

• Consider using asynchronous processing to handle requests without blocking.

• Scale the system ...read more
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Q1. Median of 2 sorted array
Ans. 
Find the median of two sorted arrays efficiently using binary search.
• Combine both arrays and sort them, then find the median. Example: [1, 3] and [2] -> [1, 2, 3] -> median is 2.

• Use binary search to partition both arrays. This reduces time complexity to O(log(min(n, m))).

• Handle even and odd lengths separately. For even, average the two middle values; for odd, take the middle value.
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Q2. Linux commands for chmod
Ans. 
The chmod command in Linux changes file permissions for users, groups, and others.
• chmod 755 filename: Sets read, write, execute for owner; read, execute for group and others.

• chmod u+x filename: Adds execute permission for the file owner.

• chmod g-w filename: Removes write permission from the group.

• chmod 644 filename: Sets read/write for owner; read for group and others.
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Q3. Features of python
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Q4. Deepcopy and shallowcopy
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Q1. Explain any ML model.
Ans. 
Random Forest is an ensemble learning method that builds multiple decision trees and merges them together to get a more accurate and stable prediction.
• Random Forest is a popular machine learning model used for classification and regression tasks.

• It works by creating multiple decision trees during training and outputs the mode of the classes for classification or the average prediction for regression.

• Random Forest is ro...read more
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Q2. Create Dataframe from two lists.
Ans. 
Creating a DataFrame from two lists in Python.
• Import the pandas library

• Create two lists of data

• Use pd.DataFrame() to create a DataFrame from the two lists
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