Optimus Information Interview Questions and Answers

Quick sort is a sorting algorithm that uses divide and conquer strategy to sort elements in an array.

• Quick sort picks a pivot element and partitions the array into two sub-arrays based on the pivot element.

• It then recursively sorts the sub-arrays.

• The complexity of quick sort is O(n log n) on average and O(n^2) in worst case scenario.

• Example: [5, 2, 9, 3, 7, 6] -> [2, 3, 5, 6, 7, 9]

Reverse a linked list by changing the direction of pointers

• Start with three pointers: current, previous, and next

• Iterate through the linked list, updating pointers to reverse the direction

• Return the new head of the reversed linked list

I am a recent graduate with a degree in Computer Science and a passion for software development.

• I recently graduated with a degree in Computer Science from XYZ University.

• I have completed internships at ABC Company and DEF Company, where I gained experience in software development.

• I am proficient in programming languages such as Java, Python, and C++.

• I am excited about the opportunity to learn and grow as a Software Engineer Trainee at your company.

Reacting hooks are a feature in React that allow functional components to use state and lifecycle methods. OOPs concepts are not present in JavaScript.

• Reacting hooks are used in React functional components to manage state and side effects.

• Examples of Reacting hooks include useState, useEffect, useContext, etc.

• Object-oriented programming concepts like classes and inheritance are not present in JavaScript.

• JavaScript is a prototype-based language, where objects inherit propertie...read more

Natural join combines tables based on common columns, while self-join joins a table with itself.

• Natural join automatically joins tables based on columns with the same name

• Self-join is used to join a table with itself to compare rows within the same table

• Self-join is commonly used to compare related rows in a hierarchical structure

In the last project, we used Azure services such as Azure Virtual Machines, Azure Blob Storage, and Azure Functions.

• Azure Virtual Machines for hosting applications and services

• Azure Blob Storage for storing unstructured data

• Azure Functions for serverless computing

Oops concepts in .NET Core include inheritance, polymorphism, encapsulation, and abstraction.

• Inheritance allows a class to inherit properties and behavior from another class.

• Polymorphism allows objects to be treated as instances of their parent class.

• Encapsulation hides the internal state of an object and only exposes necessary functionality.

• Abstraction allows for the creation of abstract classes and methods that must be implemented by derived classes.