Publicis Sapient Interview Questions, Process, and Tips

Q1. React basics and state management
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Food fill problem from leetcode

Q1. Asked about data structures and algorithms, interview went smoothly because of great intervier.
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Q2. Insertion sort algorithm
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Insertion sort is a simple sorting algorithm that builds the final sorted array one item at a time.
• Iterate through the array starting from the second element

• Compare each element with the elements before it and insert it in the correct position

• Repeat until the entire array is sorted

• Example: ['3', '1', '4', '1', '5', '9', '2', '6'] -> ['1', '1', '2', '3', '4', '5', '6', '9']
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DOM Manipulation, CSS Coding, Security in Front End

Q1. How to implement DWH n why
Ans. 
A data warehouse (DWH) is implemented to centralize and integrate data from various sources for analysis and reporting purposes.
• DWH helps in improving data quality and consistency by integrating data from multiple sources.

• It provides a single source of truth for decision-making by consolidating data into a unified view.

• DWH enables historical analysis and trend identification by storing large volumes of data over time.

• I...read more
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Q2. Diff between elt vs etl
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ELT stands for Extract, Load, Transform while ETL stands for Extract, Transform, Load.
• ELT focuses on extracting data from the source, loading it into a target system, and then transforming it within the target system.

• ETL focuses on extracting data from the source, transforming it, and then loading it into a target system.

• In ELT, the target system has the processing power to handle the transformation tasks.

• In ETL, the t...read more
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Q3. Diff between oltp vs olap
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OLTP is a transactional system that handles real-time data processing, while OLAP is an analytical system that deals with historical data analysis.
• OLTP focuses on day-to-day operations and supports high transaction volumes.

• OLAP focuses on complex queries and data analysis for decision-making.

• OLTP databases are normalized for efficient transaction processing.

• OLAP databases are denormalized for faster query performance.

• O...read more
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Q4. Use case to create a DHA
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A DHA (Data Handling Application) is created to manage and process data efficiently.
• Identify the data sources and types of data to be handled

• Design a data model and schema for organizing the data

• Implement data collection and storage mechanisms

• Develop data processing algorithms and workflows

• Ensure data security and privacy measures

• Create user-friendly interfaces for data input and retrieval

• Perform regular data quality c...read more
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