Atos Java Developer Interview Questions and Answers

Oops concepts in Java

• Encapsulation - hiding implementation details

• Inheritance - reusing code and creating parent-child relationships

• Polymorphism - multiple forms of a method or object

• Abstraction - creating abstract classes and interfaces

• Example: Encapsulation - using private variables and public methods

• Example: Inheritance - creating a subclass that inherits from a superclass

• Example: Polymorphism - using method overloa...read more

Altering columns in databases involves modifying the structure of a table by adding, deleting or modifying columns.

• Use ALTER TABLE statement to modify columns

• Add new columns using ADD COLUMN

• Delete columns using DROP COLUMN

• Modify columns using MODIFY COLUMN

• Changing column data type may result in data loss

Reversing a number in Java

• Convert the number to a string

• Use StringBuilder to reverse the string

• Convert the reversed string back to a number

To extract words from a line in Java, split the line using whitespace as delimiter.

• Use the split() method of String class

• Pass the whitespace regex as argument to split() method

• Iterate over the resulting array to get individual words

Single Ops tool is a software that helps businesses manage their operations from a single platform.

• It streamlines processes and improves efficiency

• It can include features like scheduling, inventory management, and invoicing

• Examples include ServiceTitan, Jobber, and Housecall Pro

I am a dedicated and hardworking individual with a passion for learning and growth.

• I have a background in marketing and have worked in the industry for 5 years.

• I am currently pursuing a Master's degree in Business Administration to further my skills and knowledge.

• I am a team player and enjoy collaborating with others to achieve common goals.