Atlas Copco Senior Data Engineer Interview Questions and Answers

Q1. Sourcing and Vendor development related
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Quant , Logical REASONING , Java

Q1. Why should we hire you?
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Q2. What is your family background?
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Q3. Tell me about yourself.
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Q1. HR reached out to me through naukri. Based on my tech stack i matched the requirements. On the first call HR asked me a lot of the questions on why i was looking out for a change, what kind of work have i ...read more
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Q1. Write a program to find last non repeating character in a given string using Java 8 functions only like Streams and Lambda's.
Ans. 
Program to find last non-repeating character in a given string using Java 8 functions only.
• Use Java 8 Streams and Lambda's to filter the string and find the last non-repeating character.

• Create a Map to store the frequency of each character in the string.

• Use the filter() method to get the non-repeating characters and find the last one using reduce().
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Q2. Given two interface, Interface A and Interface B both having the same functions in them let's say apply(). If a class implements both of these interface then which function will get implemented?
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Q3. Given a employee table with name, ID, age, salary and ratings column. Find the top 3 employee based on the ratings.
Ans. 
Find the top 3 employees based on ratings in an employee table.
• Sort the employee table based on ratings in descending order.

• Select the top 3 employees from the sorted table.

• Return the selected employees as the result.
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Q4. Group anagram coding question.
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Q5. Given an Employee class with 3 fields name, age and salary. Make changes in the class so that any two employee objects having same names are considered duplicates.
Ans. 
Modify Employee class to consider objects with same names as duplicates.
• Add a static HashSet<String> to keep track of unique names.

• Override equals() and hashCode() methods to compare names.

• In the constructor, check if the name already exists in the HashSet and mark it as duplicate if true.
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Q1. It was an algorithm question which I had to code in 30 minutes
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Q2. Java/Spring related questions were asked
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They asked me about my current project and asked me to design a system similar to that