Alfa Laval Data Engineer Interview Questions and Answers

Q1. Previous organization experience
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Q1. Basics on java and python
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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. Questions were asked on Recursive programming
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Q2. What is the output of this? static void Main(string[] args) { DivideNumber(233) } static void DivideNumber(int n) { if(n>=10) { DivideNumber(n/10); } Console.Write(n/10) }
Ans. 
The output will be 23323
• The DivideNumber method recursively divides the input number by 10 until it is less than 10

• The Console.Write statement prints the result of n/10 each time the method is called
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Q3. Write Code If Input is 123, output should be "One Hundred Twenty Three";
Ans. 
Convert numeric input to words in English
• Break down the input number into hundreds, tens, and ones place

• Use a dictionary or array to map numbers to their corresponding words

• Handle special cases like teens and tens separately
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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
Ans. 
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
Ans. 
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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MCQ of programming languages - c/c++/Python , basic DS and OS questions

Q1. DS and programming language questions
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Q1. Project level discussion and questions
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Python SQL code and objectives will come

Q1. Pyspark hdfs SQL python
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Q1. Python pyspark SQL databricks aws
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