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Dun & Bradstreet Data Engineer Interview Questions and Answers
Dun & Bradstreet Data Engineer Interview Experiences
1 interview found
Selected
I applied via Referral and was interviewed in Jun 2024. There were 2 interview rounds.
Test is based on python, sql and linux
Interview is based on projects
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Interview questions from similar companies
Software Engineer Interview Questions & Answers
Athenahealth Technology
Anonymous
posted on 3 Nov 2022
I applied via Campus Placement and was interviewed before Nov 2021. There were 3 interview rounds.
There are 30 basic aptitude question in 30 minutes
3 coding question 2 were easy and 1 was of medium level
Interview Preparation Tips
I appeared for an interview in Mar 2017.
Interview Questionnaire
1 Question
- Q1. Views on their recruiting process
- Ans.
I believe the recruiting process is thorough and well-organized.
The company uses a combination of resume screening, interviews, and assessments to evaluate candidates.
They have a clear timeline for the hiring process and keep candidates informed of their progress.
Feedback is provided to candidates after interviews to help them improve for future opportunities.
Interview Preparation Tips
Experience:
I applied via Approached by Company and was interviewed before Jul 2021. There was 1 interview round.
(1 Question)
- Q1. How would you write a REST API from scratch? Explain your role in the project.
- Ans.
To write a REST API from scratch, I would follow these steps:
Define the resources and endpoints
Choose a programming language and framework
Implement CRUD operations for each resource
Use HTTP methods and status codes correctly
Add authentication and authorization
Test the API using tools like Postman
Document the API using tools like Swagger
Interview Preparation Tips
Skills evaluated in this interview
Interview Preparation Tips
(2 Questions)
- Q1. Self introduction
- Q2. Knowledge of data handling
Interview Preparation Tips
I appeared for an interview in Apr 2021.
(1 Question)
Round duration - 45 Minutes
Round difficulty - Medium
- Q1.
Find the Second Largest Element
Given an array or list of integers 'ARR', identify the second largest element in 'ARR'.
If a second largest element does not exist, return -1.
Example:
Input:
ARR = [2,...
- Ans.
Find the second largest element in an array of integers.
Iterate through the array to find the largest and second largest elements.
Handle cases where all elements are identical.
Return -1 if a second largest element does not exist.
Round duration - 20 Minutes
Round difficulty - Easy
Interview Preparation Tips
Tip 1 : Start with basic probability and statistics
Tip 2 : Prepare Machine Learning well
Tip 3 : Be good with any visualisation tool like Tableau
Tip 4 : Do some problems on kaggle
Tip 1 : Provide certifications for SQL, Machine Learning etc.
Tip 2 : Include some good ML projects in the resume
Skills evaluated in this interview
I applied via Campus Placement and was interviewed in Nov 2022. There were 2 interview rounds.
(2 Questions)
- Q1. Tell me about yourself
- Ans.
I am a data analyst with a strong background in statistics and programming.
Experienced in analyzing large datasets and extracting meaningful insights
Proficient in statistical analysis and data visualization tools such as Python, R, and Tableau
Skilled in SQL for data querying and manipulation
Strong problem-solving and critical thinking abilities
Effective communication skills for presenting findings to stakeholders
- Q2. Projects you have done
- Ans.
Developed a predictive model to forecast customer churn for a telecommunications company.
Used machine learning algorithms to analyze customer data
Performed feature engineering to identify key predictors of churn
Built and trained a model using historical data
Evaluated model performance and provided actionable insights to reduce churn
Interview Preparation Tips
- Python
- sql
- guest estimate
- machine learning
I applied via Naukri.com and was interviewed in Sep 2022. There were 3 interview rounds.
(2 Questions)
- Q1. I was interviewed for 2yr experience. Normal Core java and basic sql question.
- Q2. Oops concept. Collections. Abstract class and interface. Sql procedures and functions Sql basic query
(2 Questions)
- Q1. Questions related to the projects worked till date. Explain your project. And counter question on your project.
- Q2. How many projects have you worked on? Explain each in short.
Interview Preparation Tips
Selected
I applied via Recruitment Consulltant and was interviewed before Aug 2022. There were 5 interview rounds.
They will prove some static design template image need to conver in responsive HTML5 code they will prove some images related to the template provided
(2 Questions)
- Q1. Questions on responsive design device resolutions size and some js basic questions
- Q2. Sudo element in css iPad and desktop screen resolution Javascript elements Difference between dot &# class in css How to declare and define class in css
- Ans.
sudo element in CSS allows styling of elements based on their parent element
sudo element in CSS is used to select elements based on their parent element
It is denoted by the > symbol
Example: div > p { color: red; } selects all <p> elements that are direct children of <div> elements
(1 Question)
- Q1. About your qualifications and last company designation role package
(2 Questions)
- Q1. How to add internal and external css in html code Difference between HTML5 & HTML
- Ans.
Internal CSS is added within the <style> tag in the <head> section of HTML, while external CSS is linked using the <link> tag.
Internal CSS is added within the <style> tag in the <head> section of HTML
External CSS is linked using the <link> tag with the 'rel' attribute set to 'stylesheet' and the 'href' attribute pointing to the CSS file
Example: <style> body { background-color: ...
- Q2. Difference between Css & SAAS
- Ans.
CSS is a styling language used to style web pages, while SASS is a preprocessor scripting language that is interpreted into CSS.
CSS is a styling language used to describe the look and formatting of a document written in HTML.
SASS is a preprocessor scripting language that is interpreted into CSS.
SASS allows for variables, nesting, and mixins to be used in the stylesheet, making it more efficient and maintainable.
CSS is ...
Interview Preparation Tips
Skills evaluated in this interview
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based on 1 interview
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