Principal Global Services Interview Questions and Answers

After 3 sections of aptitude, English and core subjects, there were two coding problems both based on string one was easy and other was medium.

Q1. Explain the projects in your resume
Ans. 
Developed a web-based project management tool for tracking tasks and deadlines
• Utilized HTML, CSS, JavaScript for front-end development

• Used PHP and MySQL for back-end functionality

• Implemented user authentication and authorization features

• Integrated calendar and notification system for task reminders
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Q2. Explain the backend side of your project
Ans. 
The backend of my project is responsible for handling server-side logic and data processing.
• Implemented RESTful APIs for communication between frontend and backend

• Used Node.js and Express for server-side scripting

• Utilized MongoDB for database management

• Implemented authentication and authorization using JWT tokens
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Q3. How did you implement concepts of OOP in your projects
Ans. 
I implemented concepts of OOP in my projects by creating classes, objects, inheritance, encapsulation, and polymorphism.
• Used classes to represent real-world entities

• Implemented inheritance to reuse code and create a hierarchy of classes

• Utilized encapsulation to hide data and restrict access to it

• Applied polymorphism to allow objects of different classes to be treated as objects of a common superclass
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Q4. How to handle duplicate entries in the database
Ans. 
Duplicate entries in the database can be handled by using unique constraints, deduplication scripts, or merging duplicate records.
• Use unique constraints in the database schema to prevent duplicate entries.

• Implement deduplication scripts to regularly scan and remove duplicate records.

• Merge duplicate records by updating one record with the information from the other duplicate record.
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Q5. Write a code to tell whether a string is palindrome or not
Ans. 
Code to check if a string is a palindrome or not
• Create a function that takes a string as input

• Remove all non-alphanumeric characters and convert to lowercase

• Compare the string with its reverse to check if it's a palindrome
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Q1. Fixed assets account questions
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Q2. Expenses accounting questions
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Q1. R2R RELATED QUESTION
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Q2. Accounts payable
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Q1. Salary discussions and company policy information
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Q1. End to End project Architecture and data pipeline working
Ans. 
End to end project architecture involves designing and implementing a data pipeline to process and analyze data from various sources.
• Define project requirements and goals

• Design data architecture including data sources, storage, processing, and analytics tools

• Implement data pipeline to extract, transform, and load data

• Ensure data quality and consistency throughout the pipeline

• Monitor and optimize performance of the data...read more
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Q2. Optimization performed in current project
Ans. 
Implemented query optimization techniques to improve performance in data processing.
• Utilized indexing to speed up data retrieval

• Optimized SQL queries by rewriting them for better performance

• Implemented caching mechanisms to reduce redundant data processing
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Q3. SQL query to delete Duplicates using CTEs
Ans. 
Using Common Table Expressions (CTEs) to delete duplicates in SQL query
• Use a CTE to identify duplicates by ranking rows based on a unique identifier

• Delete rows with duplicate ranks in the main query
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Q4. Basic Python theory questions on lists and tuples and dictionaries
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Q5. Reverse a list without inbuilt functions
Ans. 
Reverse a list without using inbuilt functions
• Create two pointers, one at the start and one at the end of the array

• Swap the elements at the two pointers and move them towards the center until they meet

• Repeat the process until the entire list is reversed
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Q1. End to End Project implementation
Ans. 
End to end project implementation involves taking a project from conception to completion, including planning, development, testing, and deployment.
• Define project goals and requirements

• Design data pipelines and architecture

• Develop and implement data processing algorithms

• Test and validate data quality and accuracy

• Deploy and monitor the project in production

• Iterate and improve based on feedback
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Q2. ETL Data warehousing concepts like CDC,SCD & Schema Design
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Q3. Question on Data Mesh & Architecture Design for ETL
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Q4. SQL joins, number of records for each join
Ans. 
SQL joins combine data from two or more tables based on a related column between them.
• Different types of SQL joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

• The number of records in the result of a join depends on the type of join and the data in the tables.

• For example, an INNER JOIN will only return records that have matching values in both tables, while a LEFT JOIN will return all records from the left...read more
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Q1. Why should we hire you ?give us specific reason
Ans. 
I have a strong analytical background, excellent communication skills, and a proven track record of delivering high-quality work.
• I have a Bachelor's degree in Economics with a focus on data analysis

• I have experience using statistical software such as SPSS and Excel for data analysis

• I have completed multiple internships where I conducted market research and presented findings to senior management

• I am a quick learner and...read more
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Q2. Explain about your current process?
Ans. 
My current process involves collecting and analyzing data to provide insights and recommendations for decision-making.
• Collecting data from various sources such as databases, surveys, and reports

• Cleaning and organizing data to ensure accuracy and consistency

• Analyzing data using statistical tools and techniques

• Creating visualizations and reports to communicate findings

• Presenting insights and recommendations to stakeholde...read more
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