Jio Software Engineer Interview Questions and Answers

Bubble sorting is a simple sorting algorithm that repeatedly steps through the list, compares adjacent elements and swaps them if they are in the wrong order.

• Bubble sort is a comparison-based algorithm

• It works by comparing each pair of adjacent elements and swapping them if they are in the wrong order

• The algorithm repeats this process until no more swaps are needed

• It has a worst-case and average-case complexity of...read more

Arrays are fixed in size while ArrayLists can dynamically grow and shrink.

• Arrays are of fixed size while ArrayLists can be resized dynamically.

• Arrays can hold primitive data types and objects while ArrayLists can only hold objects.

• Arrays are faster for accessing elements while ArrayLists are faster for adding and removing elements.

• Arrays use square brackets [] to declare while ArrayLists use angle brackets <>...read more

Code to generate a random number between 15-25

• Use Math.random() to generate a random number between 0-1

• Multiply the result with the range (25-15) and add the minimum value (15)

• Use Math.floor() to round down the result to an integer

Oops concepts are fundamental to object-oriented programming. They help in creating modular and reusable code.

• Encapsulation - hiding implementation details of an object from the outside world

• Inheritance - creating new classes from existing ones, inheriting their properties and methods

• Polymorphism - ability of objects to take on many forms, depending on the context

• Abstraction - focusing on essential features of an ...read more

Multiple inheritance is not allowed in Java to avoid the diamond problem.

• Java supports multiple interface inheritance to achieve the same functionality.

• Diamond problem occurs when a class inherits from two classes with a common method.

• Java prioritizes single inheritance to maintain simplicity and avoid ambiguity.