John Deere Data Engineer Interview Questions and Answers

Q1. What is ETL ?
Ans. 
ETL stands for Extract, Transform, Load. It is a process used to extract data from various sources, transform it into a consistent format, and load it into a target database.
• Extract: Data is extracted from different sources such as databases, files, APIs, etc.

• Transform: Data is cleaned, validated, and transformed into a consistent format suitable for analysis.

• Load: The transformed data is loaded into a target database ...read more
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Focus on logical reasoning, quantitative analysis, and verbal reasoning.

Two questions were given that pertained to arrays and strings. It is advisable to practice more with array and string manipulation.

It was an elimination round, and the assigned topic was ChatGPT. We discussed it for 30 minutes.

Q1. Can you introduce yourself, and what do you know about the company?
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Q2. Data analysis-related questions were asked during the interview
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Q1. Why we should select you
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Q2. What are your qualifications
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Q3. Tell me something about us
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Q4. Howyoun are good than othes
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Q1. Introduce yourself?
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Q2. Tell me about your projects
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Q1. What is polymorphism in OOPS
Ans. 
Polymorphism in OOPS refers to the ability of a single function or method to operate on different types of data.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: Inheritance allows a child class to override a method of its parent class, providing different implem
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Q2. How SQL Performance Can Be Optimized
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SQL performance can be optimized by using indexes, optimizing queries, minimizing network round trips, and using proper data types.
• Use indexes on columns frequently used in WHERE clauses to speed up data retrieval.

• Optimize queries by avoiding unnecessary joins, using WHERE clauses effectively, and limiting the number of rows returned.

• Minimize network round trips by batching multiple queries into a single request.

• Use pr...read more
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Q1. Salary Expectation as per Your Role
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My salary expectation as a Senior Software Engineer is based on industry standards, my experience, and the responsibilities of the role.
• Research industry standards for Senior Software Engineer salaries

• Consider my years of experience and expertise in software development

• Factor in the specific responsibilities and requirements of the role

• Negotiate based on the company's budget and benefits package

• Be open to discussing sa
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Q2. How will manage If you see the application is crashed
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I will investigate the root cause, analyze logs, and work on fixing the issue to prevent future crashes.
• Investigate the crash logs to identify the root cause

• Analyze the code to understand the issue

• Implement a fix for the crash

• Test the fix thoroughly before deploying it

• Implement monitoring and alerting to catch similar issues in the future
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