Optimus Information Interview Questions and Answers

The first round is basically a combination of the Aptitude and Coding rounds which had 22 Questions, 20 on the Quants and Aptitude and 2 Coding Questions. The first coding Question was based on a simple mathematics problem, but the second one was a little difficult which included methods like HashMap and PriorityQueue. But I cleared it in the first round.

Q1. Tell me about your internship, and what technologies you use.
Ans. 
I interned at a software development company where I worked on web development projects using technologies like HTML, CSS, JavaScript, and React.
• Interned at a software development company

• Worked on web development projects

• Used technologies like HTML, CSS, JavaScript, and React
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Q2. Tell me about reacting hooks and if oops are present in js give an example
Ans. 
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...read more
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Q3. Difference between Natural and self-join and where we use self-join
Ans. 
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
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Aptitude test basically contains of questions related to aptitude, behavioral questions, sql, oops concepts and coding also.

Q1. After aptitude test whomsoever get shortlisted will go for next round which is technical round. Our Technical interviewers ask questions related to technical aspects like oops, sql, sorting algorithms, run...read more
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Q1. It is mainly related to know about the background of the shortlisted candidate related his/her family, education, hobbies, likes, dislikes etc.
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Q1. It is basically PI round with Anil Chawla who take interwiews in every aspects it can be related to technical aspects or it can be either personal background also.
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Q1. Oops concepts in .NET CORe
Ans. 
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 ...read more
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Q2. Design principles
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Q1. Azure services used in last project
Ans. 
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
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Q2. Any challenges faced
Ans. 
One challenge faced was managing a diverse team with varying skill levels and personalities.
• Balancing workload distribution among team members

• Resolving conflicts and promoting teamwork

• Providing support and guidance for skill development

• Adapting leadership style to individual team members
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Q1. Why you want to switch
Ans. 
Seeking new challenges and opportunities for growth in a leadership role.
• Looking for a new challenge to further develop my leadership skills

• Interested in taking on more responsibility and leading a team

• Excited about the opportunity to make a bigger impact in a leadership position
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Q2. Why you want to join us
Ans. 
I want to join your team because of your reputation for innovation and collaboration.
• I am impressed by the innovative projects your team has worked on, such as [example project].

• I value collaboration and believe I can contribute effectively to your team dynamic.

• I am excited about the opportunity to learn and grow in a challenging environment like yours.
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Basic to Medium aptitude Questions

2 coding Qustions
one is easy and another one is medium level

Q1. Reverse a linked list
Ans. 
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
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Q2. Sorting related questions like quick sort ,Merge Sort, and their complexity
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Q3. SQL queries related to joins
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Q4. Patter based coding questions
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Q5. OOPS related Questions -Abstraction, Polymorphism, Encapsulation.
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Q6. Project related questions
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Q1. Project related questions
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Q2. Explain quick sort and their complexity
Ans. 
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]
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Q3. SQL Queries - Second Maximum Salary
Ans. 
Retrieve the second highest salary from a database using SQL queries.
• Use the 'DISTINCT' keyword to avoid duplicate salaries.

• A common approach is to use 'ORDER BY' and 'LIMIT' clauses.

• Example: SELECT DISTINCT salary FROM employees ORDER BY salary DESC LIMIT 1 OFFSET 1;

• Another method is using a subquery: SELECT MAX(salary) FROM employees WHERE salary < (SELECT MAX(salary) FROM employees);
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Q4. Some coding Questions
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Q1. Project related questions
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Q2. HTML, CSS , JavaScript related questions
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Q3. Some SQL Queries
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