Colruyt Group Interview Questions and Answers for Experienced

Aptitude test was easy level and moderate level.

Coding test was held in the google form which was very easy.

Q1. What is volatile keyword?
Ans. 
The volatile keyword in software engineering is used to indicate that a variable's value can be modified by multiple threads.
• Volatile keyword ensures that the variable's value is always read from and written to the main memory, rather than cached in a thread's local cache.

• It is used to prevent unexpected behavior in multi-threaded environments where multiple threads may access and modify the same variable simultaneousl...read more
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Q2. What is abstract class
Ans. 
An abstract class is a class that cannot be instantiated and is meant to be subclassed.
• An abstract class can have abstract methods that must be implemented by its subclasses.

• An abstract class can also have non-abstract methods that can be inherited by its subclasses.

• An abstract class provides a common interface for its subclasses.

• An abstract class can have instance variables and constructors.

• An abstract class cannot be...read more
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Q3. Where do you use abstract class
Ans. 
Abstract classes are used to provide a common interface and partial implementation for related classes.
• Abstract classes are used when you want to create a base class that cannot be instantiated on its own but can be inherited by other classes.

• They are useful when you want to define common methods and properties that multiple related classes should have.

• Abstract classes can have both abstract and non-abstract methods.

• Ab...read more
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Q1. Hr round was good they asked basic questions and CTC details
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Q1. Beware from fake interviews .The team manager already knew he would take a male candidate for the role .So basically he did time pass in the interview asked me all kinds of exploratory questions making me ...read more
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Q1. Just focus on sql and leetcode
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Q2. What is joins in sql
Ans. 
Joins in SQL are used to combine rows from two or more tables based on a related column between them.
• Joins are used to retrieve data from multiple tables based on a related column

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column
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Q3. Reverse the array
Ans. 
Reverse the array of strings
• Create a new array and iterate through the original array in reverse order, adding each element to the new array

• Use built-in array methods like reverse() or spread operator for a more concise solution

• Ensure to handle edge cases like empty array or array with only one element
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Q1. 1. Brief about yourself. 2. What is collection library in python 3. Can a list be key of dictionary in python 4. What is difference between load balancer and api gateway 5. What is primary and secondary ...read more
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Q2. Write a code to filter anagram
Ans. 
Code to filter anagram from an array of strings
• Create a dictionary to store sorted strings as keys and original strings as values

• Iterate through the array of strings and sort each string to check for anagrams

• Return the values of the dictionary to get the filtered anagrams
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Q1. Regarding language and salary discussion
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Q1. Core java and spring boot ,data base question
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Q1. Previous company details
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It was easy to approach!

Discussions about common topics like boon or bane to society

Asked about the scenarios

Q1. Technical round related to skills and resume
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Q1. Discussions regarding work culture and compensations
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