IBS Software Services Senior Product Engineer Interview Questions and Answers

The problem was to check whether an int matrix is magic matrix ( where sum of elements in row = sum of elements in column = sum of elements in diagonal)

Q1. Problem on hashmap
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Q2. Questions about spring boot, projects
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Q1. More questions on spring boot
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Q1. Internal working of hashmap
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HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.

• If multiple keys hash to the same index, a linked list is used to handle collisions.

• To retrieve a value, the key is hashed a...read more
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Q1. Explain OOP Concepts with Example.
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OOP Concepts are fundamental principles in object-oriented programming that help in organizing code efficiently.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class). Example: Class Car with properties like make, model, and methods like start(), stop().

• Inheritance: Allows a class to inherit properties and methods from another class. Example: Class SUV inheriting from class Car.

• Pol...read more
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Q2. Method Overloading and Method Overriding
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