Optum Global Solutions Software Engineer Interview Questions, Process, and Tips for Experienced

Q1. Rate yourself in the technology that you have added in your skills.
Ans. 
I rate myself 8 out of 10 in Java, 7 out of 10 in Python, and 6 out of 10 in SQL.
• Java - Strong understanding of OOP concepts, experience with Spring framework

• Python - Proficient in data manipulation and analysis, used in various automation scripts

• SQL - Comfortable writing complex queries, experience with database management
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String manipulation questions

Q1. Array search and sorting
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Q1. What are constructors in dot net core and how will you overload a constructor.
Ans. 
Constructors are special methods used to initialize objects. Overloading allows multiple constructors with different parameters.
• Constructors have the same name as the class and no return type.

• Overloading constructors allows for different ways to initialize objects.

• Example: public class Person { public Person(string name) { } public Person(string name, int age) { } }

• Overloaded constructors can call each other using the
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Q2. How to make restrict a class so that it can not be inherited
Ans. 
To restrict a class from being inherited, mark it as final.
• Use the final keyword before the class declaration.

• Final classes cannot be subclassed.

• Any attempt to subclass a final class will result in a compile-time error.
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Q3. What are constraints in Sql
Ans. 
Constraints in SQL are rules that limit the type of data that can be inserted, updated or deleted from a table.
• Constraints ensure data integrity and consistency.

• Types of constraints include primary key, foreign key, unique, check, and default constraints.

• Examples of constraints include ensuring a column cannot have null values, or ensuring a foreign key references a valid primary key.

• Constraints can be added when creat...read more
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Q1. Tell me about yourself and the work you have done in recent times.
Ans. 
I am a software engineer with experience in developing web applications using Java and JavaScript.
• Developed a web application using Java Spring framework

• Implemented RESTful APIs for data retrieval and manipulation

• Utilized JavaScript frameworks like React.js for front-end development

• Worked on database design and optimization using SQL

• Collaborated with cross-functional teams to deliver high-quality software
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Q2. What new technology have you learned in last 6 months.
Ans. 
I have learned about React Native in the last 6 months.
• I have learned how to build mobile applications using React Native.

• I have learned about the different components and libraries available in React Native.

• I have also learned how to integrate React Native with other technologies like Firebase.

• For example, I built a mobile app for a client using React Native and Firebase for real-time data updates.
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Q1. What are the features of Java 8?
Ans. 
Java 8 introduced significant features like lambdas, streams, and the new Date-Time API, enhancing productivity and code readability.
• Lambda Expressions: Enable concise representation of functional interfaces. Example: (a, b) -> a + b.

• Streams API: Facilitates functional-style operations on collections. Example: list.stream().filter(x -> x > 10).collect(Collectors.toList()).

• Default Methods: Allow interfaces to h...read more
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Q2. What is the process for implementing a linked list?
Ans. 
Implementing a linked list involves defining nodes, linking them, and providing methods for insertion, deletion, and traversal.
• Define a Node class with data and a pointer to the next node.

• Create a LinkedList class to manage the head node and operations.

• Implement methods for insertion (at head, tail, or specific position).

• Implement methods for deletion (by value or position).

• Provide traversal methods to display the list
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Q1. What is an IoC (Inversion of Control) container?
Ans. 
An IoC container manages object creation and dependencies, promoting loose coupling and easier testing in software applications.
• IoC containers handle the instantiation and lifecycle of objects, reducing manual dependency management.

• They support Dependency Injection (DI), allowing dependencies to be provided externally rather than hard-coded.

• Examples include Spring Framework (Java), .NET Core's built-in IoC container, a...read more
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