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Optum Global Solutions Senior Data Scientist Interview Questions and Answers

Updated 8 Oct 2024

Optum Global Solutions Senior Data Scientist Interview Experiences

1 interview found

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. What is random forest
  • Ans. 

    Random forest is an ensemble learning method used for classification and regression tasks.

    • Random forest is a collection of decision trees that are trained on random subsets of the data.

    • Each tree in the random forest independently predicts the target variable, and the final prediction is made by averaging the predictions of all trees.

    • Random forest is robust to overfitting and noisy data, and it can handle large datasets...

  • Answered by AI
  • Q2. Bias variance trade off

Skills evaluated in this interview

Interview questions from similar companies

Interview Questionnaire 

2 Questions

  • Q1. What is Data
  • Ans. 

    Data is a collection of facts, figures, or statistics that can be analyzed to gain insights and make informed decisions.

    • Data can be structured or unstructured

    • Data can be qualitative or quantitative

    • Examples of data include customer demographics, sales figures, and website traffic

    • Data can be analyzed using various tools and techniques to extract meaningful insights

  • Answered by AI
  • Q2. Data types

Skills evaluated in this interview

I applied via Recruitment Consultant and was interviewed in Dec 2020. There were 4 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. Basics of redux and react es6 js css3

Interview Preparation Tips

Interview preparation tips for other job seekers - First of all go through the job description .Brush up all your basics .And do practice hands on coding.

I was interviewed before Dec 2020.

Round 1 - Video Call 

(4 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

This round consisted of questions from DS/Algo , OOPS and Operating Systems primarily usage of some basic UNIX commands .

  • Q1. 

    Kth Largest Number Problem Statement

    You are given a continuous stream of numbers, and the task is to determine the kth largest number at any moment during the stream.

    Explanation:

    A specialized data st...

  • Ans. 

    Design a data structure to find the kth largest number in a continuous stream of integers.

    • Design a specialized data structure to handle an indefinite number of integers from the stream.

    • Implement 'add(DATA)' to incorporate integers into the stream's pool.

    • Implement 'getKthLargest()' to retrieve the kth largest number from the pool.

    • Maintain the pool of numbers and return the kth largest number for each query.

    • Ensure effici

  • Answered by AI
  • Q2. What is an interface?
  • Ans. 

    An interface in software engineering is a contract that defines the methods that a class must implement.

    • Defines a set of methods that a class must implement

    • Provides a way to achieve abstraction and multiple inheritance

    • Helps in achieving loose coupling between classes

  • Answered by AI
  • Q3. Can you explain the SOLID principles in Object-Oriented Design?
  • Ans. 

    SOLID principles are a set of five design principles in object-oriented programming to make software designs more understandable, flexible, and maintainable.

    • S - Single Responsibility Principle: A class should have only one reason to change.

    • O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

    • L - Liskov Substitution Principle: Objects of a superclass should be replaceable...

  • Answered by AI
  • Q4. Can you explain piping in Unix/Linux?
  • Ans. 

    Piping in Unix/Linux allows the output of one command to be used as the input for another command.

    • Piping is done using the '|' symbol

    • It helps in connecting multiple commands together to perform complex operations

    • Example: ls -l | grep 'txt' - This command lists all files in long format and then filters for files with 'txt' in their name

  • Answered by AI
Round 2 - Video Call 

(5 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

This round had questions revolving around OS , Selenium and some common concepts from DBMS. The interviewer was quite experienced and made the whole interview quite wholesome for me.

  • Q1. Can you explain any 5 essential UNIX commands?
  • Ans. 

    Essential UNIX commands include ls, cd, pwd, mkdir, and rm.

    • ls - list directory contents

    • cd - change directory

    • pwd - print working directory

    • mkdir - make directory

    • rm - remove files or directories

  • Answered by AI
  • Q2. How do you enable Actuator in a Spring Boot application?
  • Ans. 

    To enable Actuator in a Spring Boot application, you need to include the Actuator dependency in your pom.xml file and configure it in the application.properties file.

    • Include Actuator dependency in pom.xml file

    • Configure Actuator endpoints in application.properties file

    • Access Actuator endpoints to monitor and manage the application

  • Answered by AI
  • Q3. What is dependency injection?
  • Ans. 

    Dependency injection is a design pattern in which components are given their dependencies rather than creating them internally.

    • Allows for easier testing by providing mock dependencies

    • Promotes loose coupling between components

    • Improves code reusability and maintainability

    • Examples: Constructor injection, Setter injection, Interface injection

  • Answered by AI
  • Q4. What are Self-Join and Cross-Join in the context of database management systems?
  • Ans. 

    Self-Join is when a table is joined with itself, while Cross-Join is when every row from one table is combined with every row from another table.

    • Self-Join is used to combine rows with other rows in the same table.

    • Cross-Join generates a Cartesian product of the two tables involved.

    • Self-Join is typically used to compare rows within the same table, like in hierarchical structures.

    • Cross-Join is used when there is no common

  • Answered by AI
  • Q5. What are views in SQL?
  • Ans. 

    Views in SQL are virtual tables that are generated based on the result set of a SELECT query.

    • Views are saved SELECT queries that can be treated as tables.

    • They can simplify complex queries by storing them as a view.

    • Views do not store data themselves, but display data from the underlying tables.

    • They can be used to restrict access to specific columns or rows of a table.

    • Views can be used for data abstraction and security p

  • Answered by AI
Round 3 - HR 

(2 Questions)

Round duration - 30 Minutes
Round difficulty - Easy

This is a cultural fitment testing round .HR was very frank and asked standard questions. Then we discussed about my role.

  • Q1. Why should we hire you?
  • Q2. Why are you looking for a job change?

Interview Preparation Tips

Eligibility criteriaAbove 2 years of experienceCapgemini interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Java , Selenium , Spring Boot, OOPSTime required to prepare for the interview - 3 monthsInterview preparation tips for other job seekers

Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.

Final outcome of the interviewSelected

Skills evaluated in this interview

I applied via Naukri.com and was interviewed in Jan 2021. There were 4 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. The question were related to Pharmacovigilance domain related to ICSRs and behavioral aspect.

Interview Preparation Tips

Interview preparation tips for other job seekers - Be calm and try to control your nerves during interview process because interviewer seek overall technical as well as behavioral aspect.

I applied via Walk-in and was interviewed before Sep 2020. There were 4 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. A lot questions.

Interview Preparation Tips

Interview preparation tips for other job seekers - I came in HCL without any reference, Randomly I came to give interview. there were total 3 rounds I faced. 1 Round Technical. 2nd Technial. 3 HR . For clearing technical round in HCL you should be technically strong. My 1st round took more than a hour and 2nd round took nearly 45 mins. Your basics should be clear and strong.

I applied via Approached by Company and was interviewed before Jun 2021. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. C#,asp.net mvc,.net core

Interview Preparation Tips

Interview preparation tips for other job seekers - Please go through glassdoor interview questions

I applied via LinkedIn and was interviewed before Nov 2020. There were 4 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. Real life example of usage of Window functions - lag and lead
  • Ans. 

    Window functions like lag and lead are used to analyze data over a specific range or window.

    • Lag function can be used to calculate the difference between current and previous values in a time series data.

    • Lead function can be used to calculate the difference between current and future values in a time series data.

    • Window functions can be used to calculate moving averages, cumulative sums, and other statistical measures.

    • Fo...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Be prapared with SQL and technical but most importantly don't be shy in talking.

Skills evaluated in this interview

I applied via Naukri.com and was interviewed in Jun 2021. There were 3 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. About SAP BODS

Interview Preparation Tips

Interview preparation tips for other job seekers - Be strong and concentrate on basics.

I applied via Naukri.com and was interviewed in Jan 2021. There was 1 interview round.

Interview Questionnaire 

1 Question

  • Q1. Why do you make the Candidate for months to process the interview

Interview Preparation Tips

Interview preparation tips for other job seekers - The first round was went well. Got a positive feedback on the same day. But they ask for almost all the documents you have. and don't schedule the client round and will get calls weekly or 2 weeks once about the next round but won't get any action.

Optum Global Solutions Interview FAQs

How many rounds are there in Optum Global Solutions Senior Data Scientist interview?
Optum Global Solutions interview process usually has 1 rounds. The most common rounds in the Optum Global Solutions interview process are Technical.
What are the top questions asked in Optum Global Solutions Senior Data Scientist interview?

Some of the top questions asked at the Optum Global Solutions Senior Data Scientist interview -

  1. What is random for...read more
  2. Bias variance trade ...read more

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Optum Global Solutions Senior Data Scientist Interview Process

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Interview experience

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Optum Global Solutions Senior Data Scientist Salary
based on 84 salaries
₹18 L/yr - ₹45 L/yr
14% more than the average Senior Data Scientist Salary in India
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